Merge pull request '葛朋林组小米便签实践作业最终版' (#8) from develop into master

README.md

@@ -1,2 +0,0 @@
-# project1
-

other/06_210340049葛朋林_代码标注/BackupUtils.java

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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.tool;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.os.Environment;
+import android.text.TextUtils;
+import android.text.format.DateFormat;
+import android.util.Log;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+
+
+public class BackupUtils {
+    private static final String TAG = "BackupUtils";
+    //    定义了一个 TAG 常量用于日志输出。
+    // Singleton stuff
+    private static BackupUtils sInstance;
+//  然后，定义了一个静态的 sInstance 变量，表示类的唯一实例，
+//  在 getInstance() 方法中进行初始化。getInstance() 方法接收一个 Context 对象，
+//  并通过判断 sInstance 是否为空来决定是否需要创建一个新的 BackupUtils 实例。
+    public static synchronized BackupUtils getInstance(Context context) {
+        if (sInstance == null) {
+            sInstance = new BackupUtils(context);
+        }
+        return sInstance;
+    }
+
+    /**
+     * Following states are signs to represents backup or restore
+     * status
+     */
+    // Currently, the sdcard is not mounted
+    public static final int STATE_SD_CARD_UNMOUONTED           = 0;
+    // The backup file not exist
+    public static final int STATE_BACKUP_FILE_NOT_EXIST        = 1;
+    // The data is not well formated, may be changed by other programs
+    public static final int STATE_DATA_DESTROIED               = 2;
+    // Some run-time exception which causes restore or backup fails
+    public static final int STATE_SYSTEM_ERROR                 = 3;
+    // Backup or restore success
+    public static final int STATE_SUCCESS                      = 4;
+
+    private TextExport mTextExport;
+    //TextExport 对象用于导出文本格式的数据
+    private BackupUtils(Context context) {
+        mTextExport = new TextExport(context);
+    }
+
+    private static boolean externalStorageAvailable() {
+        return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
+    }
+    //用于检查 SD 卡是否可用，如果当前 SD 卡挂载，则返回 true，否则返回 false。
+    public int exportToText() {
+        return mTextExport.exportToText();
+    }
+    //返回输出文本的文件名
+    public String getExportedTextFileName() {
+        return mTextExport.mFileName;
+    }
+    //返回输出文本文件的路径
+    public String getExportedTextFileDir() {
+        return mTextExport.mFileDirectory;
+    }
+
+    private static class TextExport {
+        //定义了一个数组储存便签的信息
+        private static final String[] NOTE_PROJECTION = {
+                NoteColumns.ID,
+                NoteColumns.MODIFIED_DATE,
+                NoteColumns.SNIPPET,
+                NoteColumns.TYPE
+        };
+
+        private static final int NOTE_COLUMN_ID = 0;
+
+        private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
+
+        private static final int NOTE_COLUMN_SNIPPET = 2;
+
+        private static final String[] DATA_PROJECTION = {
+                DataColumns.CONTENT,
+                DataColumns.MIME_TYPE,
+                DataColumns.DATA1,
+                DataColumns.DATA2,
+                DataColumns.DATA3,
+                DataColumns.DATA4,
+        };
+
+        private static final int DATA_COLUMN_CONTENT = 0;
+
+        private static final int DATA_COLUMN_MIME_TYPE = 1;
+
+        private static final int DATA_COLUMN_CALL_DATE = 2;
+
+        private static final int DATA_COLUMN_PHONE_NUMBER = 4;
+
+        private final String [] TEXT_FORMAT;
+        private static final int FORMAT_FOLDER_NAME          = 0;
+        private static final int FORMAT_NOTE_DATE            = 1;
+        private static final int FORMAT_NOTE_CONTENT         = 2;
+
+        private Context mContext;
+        private String mFileName;
+        private String mFileDirectory;
+
+        //从context类实例中获取信息，给对应的属性赋初始值
+        public TextExport(Context context) {
+            TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
+            mContext = context;
+            mFileName = "";
+            mFileDirectory = "";
+        }
+        //获取文本组成部分
+        //通过ID返回文件的格式信息
+        private String getFormat(int id) {
+            return TEXT_FORMAT[id];
+        }
+
+        /**
+         * Export the folder identified by folder id to text
+         */
+        //通过查询parent id是文件夹id的note来选出制定ID文件夹下的Note,通过文件夹ID将目录导出后成文件,输出文件夹至文本
+        private void exportFolderToText(String folderId, PrintStream ps) {
+            // Query notes belong to this folder
+            Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                    NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
+                        folderId
+                    }, null);
+
+            if (notesCursor != null) {
+                if (notesCursor.moveToFirst()) {
+                    do {
+                        // Print note's last modified date
+                        ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
+                                mContext.getString(R.string.format_datetime_mdhm),
+                                notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
+                        // Query data belong to this note
+                        String noteId = notesCursor.getString(NOTE_COLUMN_ID);
+                        exportNoteToText(noteId, ps);
+                    } while (notesCursor.moveToNext());
+                }
+                notesCursor.close();
+            }
+        }
+
+        /**
+         * Export note identified by id to a print stream
+         */
+        //将便签的内容以文本的形式显示在屏幕上。比如电话号码、打电话的日期等。
+        private void exportNoteToText(String noteId, PrintStream ps) {
+            Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
+                    DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
+                        noteId
+                    }, null);
+
+            if (dataCursor != null) {
+                if (dataCursor.moveToFirst()) {
+                    do {
+                        String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
+                        if (DataConstants.CALL_NOTE.equals(mimeType)) {
+                            // Print phone number
+                            String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
+                            long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
+                            String location = dataCursor.getString(DATA_COLUMN_CONTENT);
+
+                            if (!TextUtils.isEmpty(phoneNumber)) {
+                                ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
+                                        phoneNumber));
+                            }
+                            // Print call date
+                            ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
+                                    .format(mContext.getString(R.string.format_datetime_mdhm),
+                                            callDate)));
+                            // Print call attachment location
+                            if (!TextUtils.isEmpty(location)) {
+                                ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
+                                        location));
+                            }
+                        } else if (DataConstants.NOTE.equals(mimeType)) {
+                            String content = dataCursor.getString(DATA_COLUMN_CONTENT);
+                            if (!TextUtils.isEmpty(content)) {
+                                ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
+                                        content));
+                            }
+                        }
+                    } while (dataCursor.moveToNext());
+                }
+                dataCursor.close();
+            }
+            // print a line separator between note
+            try {
+                ps.write(new byte[] {
+                        Character.LINE_SEPARATOR, Character.LETTER_NUMBER
+                });
+            } catch (IOException e) {
+                Log.e(TAG, e.toString());
+            }
+        }
+
+        /**
+         * Note will be exported as text which is user readable
+         */
+        //以TEXT形式输出到外部设备
+        public int exportToText() {
+            if (!externalStorageAvailable()) {
+                Log.d(TAG, "Media was not mounted");
+                return STATE_SD_CARD_UNMOUONTED;
+            }
+
+            PrintStream ps = getExportToTextPrintStream();
+            if (ps == null) {
+                Log.e(TAG, "get print stream error");
+                return STATE_SYSTEM_ERROR;
+            }
+            // First export folder and its notes
+            Cursor folderCursor = mContext.getContentResolver().query(
+                    Notes.CONTENT_NOTE_URI,
+                    NOTE_PROJECTION,
+                    "(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND "
+                            + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR "
+                            + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER, null, null);
+
+            if (folderCursor != null) {
+                if (folderCursor.moveToFirst()) {
+                    do {
+                        // Print folder's name
+                        String folderName = "";
+                        if(folderCursor.getLong(NOTE_COLUMN_ID) == Notes.ID_CALL_RECORD_FOLDER) {
+                            folderName = mContext.getString(R.string.call_record_folder_name);
+                        } else {
+                            folderName = folderCursor.getString(NOTE_COLUMN_SNIPPET);
+                        }
+                        if (!TextUtils.isEmpty(folderName)) {
+                            ps.println(String.format(getFormat(FORMAT_FOLDER_NAME), folderName));
+                        }
+                        String folderId = folderCursor.getString(NOTE_COLUMN_ID);
+                        exportFolderToText(folderId, ps);
+                    } while (folderCursor.moveToNext());
+                }
+                folderCursor.close();
+            }
+
+            // Export notes in root's folder
+            Cursor noteCursor = mContext.getContentResolver().query(
+                    Notes.CONTENT_NOTE_URI,
+                    NOTE_PROJECTION,
+                    NoteColumns.TYPE + "=" + +Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID
+                            + "=0", null, null);
+
+            if (noteCursor != null) {
+                if (noteCursor.moveToFirst()) {
+                    do {
+                        ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
+                                mContext.getString(R.string.format_datetime_mdhm),
+                                noteCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
+                        // Query data belong to this note
+                        String noteId = noteCursor.getString(NOTE_COLUMN_ID);
+                        exportNoteToText(noteId, ps);
+                    } while (noteCursor.moveToNext());
+                }
+                noteCursor.close();
+            }
+            ps.close();
+
+            return STATE_SUCCESS;
+        }
+
+        /**
+         * Get a print stream pointed to the file {@generateExportedTextFile}
+         */
+        //获取指向文件的打印流
+        //将要输出的内容整合到一个输出里并返回该输出流
+        private PrintStream getExportToTextPrintStream() {
+            File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
+                    R.string.file_name_txt_format);
+            if (file == null) {
+                Log.e(TAG, "create file to exported failed");
+                return null;
+            }
+            mFileName = file.getName();
+            mFileDirectory = mContext.getString(R.string.file_path);
+            PrintStream ps = null;
+            try {
+                FileOutputStream fos = new FileOutputStream(file);
+                ps = new PrintStream(fos);
+            } catch (FileNotFoundException e) {
+                e.printStackTrace();
+                return null;
+            } catch (NullPointerException e) {
+                e.printStackTrace();
+                return null;
+            }
+            return ps;
+        }
+    }
+
+    /**
+     * Generate the text file to store imported data
+     */
+    //产生用于存储输入信息的文件,使文本文件存储重要数据
+    private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
+        StringBuilder sb = new StringBuilder();
+        sb.append(Environment.getExternalStorageDirectory());
+        sb.append(context.getString(filePathResId));
+        File filedir = new File(sb.toString());
+        sb.append(context.getString(
+                fileNameFormatResId,
+                DateFormat.format(context.getString(R.string.format_date_ymd),
+                        System.currentTimeMillis())));
+        File file = new File(sb.toString());
+
+        try {
+            if (!filedir.exists()) {
+                filedir.mkdir();
+            }
+            if (!file.exists()) {
+                file.createNewFile();
+            }
+            return file;
+        } catch (SecurityException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return null;
+    }
+}
+
+

other/06_210340049葛朋林_代码标注/DataUtils.java

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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.tool;
+
+import android.content.ContentProviderOperation;
+import android.content.ContentProviderResult;
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.OperationApplicationException;
+import android.database.Cursor;
+import android.os.RemoteException;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.CallNote;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+
+
+public class DataUtils {
+    public static final String TAG = "DataUtils";
+    //直接删除多个笔记
+    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
+        if (ids == null) {
+            Log.d(TAG, "the ids is null");
+            return true;
+        }
+        if (ids.size() == 0) {
+            Log.d(TAG, "no id is in the hashset");
+            return true;
+        }
+        //提供一个任务列表
+        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+        for (long id : ids) {
+            if(id == Notes.ID_ROOT_FOLDER) {
+                Log.e(TAG, "Don't delete system folder root");
+                continue;
+            }//如果发现是根文件夹，则不删除
+            ContentProviderOperation.Builder builder = ContentProviderOperation//用newDelete实现删除功能
+                    .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+            operationList.add(builder.build());
+        }
+        try {
+            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            //数据库事务，数据库事务是由一组数据库操作序列组成，事务作为一个整体被执行
+            if (results == null || results.length == 0 || results[0] == null) {
+                Log.d(TAG, "delete notes failed, ids:" + ids.toString());
+                return false;
+            }
+            return true;
+        } catch (RemoteException e) {
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+        } catch (OperationApplicationException e) {
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+        }
+        return false;
+    }
+
+    public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
+        ContentValues values = new ContentValues();
+        values.put(NoteColumns.PARENT_ID, desFolderId);
+        values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);
+        values.put(NoteColumns.LOCAL_MODIFIED, 1);
+        resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null); //对需要移动的便签进行数据更新，然后用update实现
+    }
+
+    public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
+            long folderId) {
+        if (ids == null) {
+            Log.d(TAG, "the ids is null");
+            return true;
+        }
+
+        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+        for (long id : ids) {
+            ContentProviderOperation.Builder builder = ContentProviderOperation
+                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+            builder.withValue(NoteColumns.PARENT_ID, folderId);
+            builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
+            operationList.add(builder.build());
+        }//将ids里包含的每一列的数据逐次加入到operationList中，等待最后的批量处理
+
+        try {
+            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            if (results == null || results.length == 0 || results[0] == null) {
+                Log.d(TAG, "delete notes failed, ids:" + ids.toString());
+                return false;
+            }
+            return true;
+        } catch (RemoteException e) {
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+        } catch (OperationApplicationException e) {
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+        }
+        return false;
+    }
+
+    /**
+     * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
+     */
+    public static int getUserFolderCount(ContentResolver resolver) {
+        Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,
+                new String[] { "COUNT(*)" },
+                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
+                new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
+                null); //筛选条件：源文件不为trash folder
+
+        int count = 0;
+        if(cursor != null) {
+            if(cursor.moveToFirst()) {
+                try {
+                    count = cursor.getInt(0);
+                } catch (IndexOutOfBoundsException e) {
+                    Log.e(TAG, "get folder count failed:" + e.toString());
+                } finally {
+                    cursor.close();
+                }
+            }
+        }
+        return count;
+    }
+
+    public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
+        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
+                null,
+                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
+                new String [] {String.valueOf(type)},
+                null);//查询条件：type符合，且不属于垃圾文件夹
+
+        boolean exist = false;
+        if (cursor != null) {
+            if (cursor.getCount() > 0) {
+                exist = true;
+            }
+            cursor.close();
+        }
+        return exist;
+    }
+
+    public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
+        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
+                null, null, null, null);
+
+        boolean exist = false;
+        if (cursor != null) {
+            if (cursor.getCount() > 0) {
+                exist = true;
+            }
+            cursor.close();
+        }
+        return exist;
+    }
+
+    public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
+        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
+                null, null, null, null);
+
+        boolean exist = false;
+        if (cursor != null) {
+            if (cursor.getCount() > 0) {
+                exist = true;
+            }
+            cursor.close();
+        }
+        return exist;
+    }
+
+    public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
+        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
+                NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
+                " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
+                " AND " + NoteColumns.SNIPPET + "=?",
+                new String[] { name }, null);
+        boolean exist = false;
+        if(cursor != null) {
+            if(cursor.getCount() > 0) {
+                exist = true;
+            }
+            cursor.close();
+        }
+        return exist;
+    }
+
+    public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
+        Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
+                new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
+                NoteColumns.PARENT_ID + "=?",
+                new String[] { String.valueOf(folderId) },
+                null);
+        //通过数据库操作，查询条件是（callDate和phoneNumber匹配传入参数的值）
+        HashSet<AppWidgetAttribute> set = null;
+        if (c != null) {
+            if (c.moveToFirst()) {
+                set = new HashSet<AppWidgetAttribute>();
+                do {
+                    try {
+                        AppWidgetAttribute widget = new AppWidgetAttribute();
+                        widget.widgetId = c.getInt(0);
+                        widget.widgetType = c.getInt(1);
+                        set.add(widget);
+                    } catch (IndexOutOfBoundsException e) {
+                        Log.e(TAG, e.toString());
+                    }
+                } while (c.moveToNext());
+            }
+            c.close();
+        }
+        return set;
+    }
+
+    public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
+        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
+                new String [] { CallNote.PHONE_NUMBER },
+                CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
+                new String [] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE },//查询条件：noteId
+                null);
+
+        if (cursor != null && cursor.moveToFirst()) {
+            try {
+                return cursor.getString(0);
+            } catch (IndexOutOfBoundsException e) {
+                Log.e(TAG, "Get call number fails " + e.toString());
+            } finally {
+                cursor.close();
+            }
+        }
+        return "";
+    }
+
+    public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
+        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
+                new String [] { CallNote.NOTE_ID },
+                CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
+                + CallNote.PHONE_NUMBER + ",?)",
+                new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
+                null);
+
+        if (cursor != null) {
+            if (cursor.moveToFirst()) {
+                try {
+                    return cursor.getLong(0);
+                } catch (IndexOutOfBoundsException e) {
+                    Log.e(TAG, "Get call note id fails " + e.toString());
+                }
+            }
+            cursor.close();
+        }
+        return 0;
+    }
+
+    public static String getSnippetById(ContentResolver resolver, long noteId) {
+        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
+                new String [] { NoteColumns.SNIPPET },
+                NoteColumns.ID + "=?",
+                new String [] { String.valueOf(noteId)},
+                null);
+
+        if (cursor != null) {
+            String snippet = "";
+            if (cursor.moveToFirst()) {
+                snippet = cursor.getString(0);
+            }
+            cursor.close();
+            return snippet;
+        }
+        throw new IllegalArgumentException("Note is not found with id: " + noteId);
+    }
+
+    public static String getFormattedSnippet(String snippet) {//对字符串进行格式处理，将字符串两头的空格去掉，同时将换行符去掉
+        if (snippet != null) {
+            snippet = snippet.trim();
+            int index = snippet.indexOf('\n');
+            if (index != -1) {
+                snippet = snippet.substring(0, index);
+            }
+        }
+        return snippet;
+    }
+}

other/06_210340049葛朋林_代码标注/GTaskASyncTask.java

@@ -0,0 +1,129 @@
+
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;
+
+import android.app.Notification;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.os.AsyncTask;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.NotesListActivity;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+
+public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
+    //异步操作类，实现GTask的异步操作过程
+    private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;
+
+    public interface OnCompleteListener {
+        void onComplete();
+    }
+
+    private Context mContext;
+
+    private NotificationManager mNotifiManager;
+
+    private GTaskManager mTaskManager;
+
+    private OnCompleteListener mOnCompleteListener;
+
+    public GTaskASyncTask(Context context, OnCompleteListener listener) {
+        mContext = context;
+        mOnCompleteListener = listener;
+        mNotifiManager = (NotificationManager) mContext
+                .getSystemService(Context.NOTIFICATION_SERVICE);
+        mTaskManager = GTaskManager.getInstance();
+    }
+
+    public void cancelSync() {
+        mTaskManager.cancelSync();
+    }
+
+    public void publishProgess(String message) {
+        publishProgress(new String[] {
+            message
+        });
+    }
+
+    private void showNotification(int tickerId, String content) {// 向用户提示当前同步的状态，是一个用于交互的方法
+        PendingIntent pendingIntent;
+        if (tickerId != R.string.ticker_success) {
+            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+                    NotesPreferenceActivity.class), 0);
+
+        } else {
+            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+                    NotesListActivity.class), 0);
+        }
+
+
+        Notification.Builder builder = new Notification.Builder(mContext)
+                .setAutoCancel(true)
+                .setContentTitle(mContext.getString(R.string.app_name))
+                .setContentText(content)
+                .setContentIntent(pendingIntent)
+                .setWhen(System.currentTimeMillis())
+                .setOngoing(true);
+        Notification notification=builder.getNotification();
+        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+    }
+
+
+
+    @Override
+    protected Integer doInBackground(Void... unused) {//此方法在后台线程执行，完成任务的主要工作，通常需要较长的时间
+        publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity
+                .getSyncAccountName(mContext)));
+        return mTaskManager.sync(mContext, this);
+    }
+
+    @Override
+    protected void onProgressUpdate(String... progress) {//可以使用进度条增加用户体验度。 此方法在主线程执行，用于显示任务执行的进度。
+        showNotification(R.string.ticker_syncing, progress[0]);
+        if (mContext instanceof GTaskSyncService) {
+            ((GTaskSyncService) mContext).sendBroadcast(progress[0]);
+        }
+    }
+
+    @Override
+    protected void onPostExecute(Integer result) {//相当于Handler 处理UI的方式，在这里面可以使用在doInBackground 得到的结果处理操作UI
+        if (result == GTaskManager.STATE_SUCCESS) {
+            showNotification(R.string.ticker_success, mContext.getString(
+                    R.string.success_sync_account, mTaskManager.getSyncAccount()));
+            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
+        } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
+            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network));
+        } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
+            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_internal));
+        } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
+            showNotification(R.string.ticker_cancel, mContext
+                    .getString(R.string.error_sync_cancelled));
+        }
+        if (mOnCompleteListener != null) {
+            new Thread(new Runnable() {
+
+                public void run() {
+                    mOnCompleteListener.onComplete();
+                }
+            }).start();
+        }
+    }
+}

other/06_210340049葛朋林_代码标注/GTaskClient.java

@@ -0,0 +1,621 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.remote;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.accounts.AccountManagerFuture;
+import android.app.Activity;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.gtask.data.Node;
+import net.micode.notes.gtask.data.Task;
+import net.micode.notes.gtask.data.TaskList;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.gtask.exception.NetworkFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.cookie.Cookie;
+import org.apache.http.impl.client.BasicCookieStore;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.params.BasicHttpParams;
+import org.apache.http.params.HttpConnectionParams;
+import org.apache.http.params.HttpParams;
+import org.apache.http.params.HttpProtocolParams;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+
+public class GTaskClient {
+    //实现GTask的登录以及创建GTask任务和任务列表，从网络上获取任务内容
+    private static final String TAG = GTaskClient.class.getSimpleName();
+
+    private static final String GTASK_URL = "https://mail.google.com/tasks/";
+
+    private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";
+
+    private static final String GTASK_POST_URL = "https://mail.google.com/tasks/r/ig";
+
+    private static GTaskClient mInstance = null;
+
+    private DefaultHttpClient mHttpClient;
+
+    private String mGetUrl;
+
+    private String mPostUrl;
+
+    private long mClientVersion;
+
+    private boolean mLoggedin;
+
+    private long mLastLoginTime;
+
+    private int mActionId;
+
+    private Account mAccount;
+
+    private JSONArray mUpdateArray;
+    private GTaskClient() {
+        mHttpClient = null;
+        mGetUrl = GTASK_GET_URL;
+        mPostUrl = GTASK_POST_URL;
+        mClientVersion = -1;
+        mLoggedin = false;
+        mLastLoginTime = 0;
+        mActionId = 1;
+        mAccount = null;
+        mUpdateArray = null;
+    }
+
+    //获取实例，如果当前没有示例，则新建一个登陆的gtask，如果有直接返回
+    public static synchronized GTaskClient getInstance() {
+        if (mInstance == null) {
+            mInstance = new GTaskClient();
+        }
+        return mInstance;
+    }
+    //login：用于实现登录的方法，以activity作为参数
+    public boolean login(Activity activity) {
+        // we suppose that the cookie would expire after 5 minutes
+        // then we need to re-login
+        final long interval = 1000 * 60 * 5;
+        //判断距离上次登录的时间间隔，若超过5分钟，则重置登录状态
+        if (mLastLoginTime + interval < System.currentTimeMillis()) {
+            mLoggedin = false;
+        }
+
+        // need to re-login after account switch需要重新登录
+        if (mLoggedin
+                && !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
+                        .getSyncAccountName(activity))) {
+            mLoggedin = false;
+        }
+        //如果登录的时候符合上面的要求则让其显示已登录登陆
+        if (mLoggedin) {
+            Log.d(TAG, "already logged in");
+            return true;
+        }
+
+        mLastLoginTime = System.currentTimeMillis();
+        String authToken = loginGoogleAccount(activity, false);
+        //登录失败的情况
+        if (authToken == null) {
+            Log.e(TAG, "login google account failed");
+            return false;
+        }
+
+        // login with custom domain if necessary
+        if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()
+                .endsWith("googlemail.com"))) {
+            StringBuilder url = new StringBuilder(GTASK_URL).append("a/");
+            int index = mAccount.name.indexOf('@') + 1;
+            String suffix = mAccount.name.substring(index);
+            url.append(suffix + "/");
+            mGetUrl = url.toString() + "ig";
+            mPostUrl = url.toString() + "r/ig";
+
+            if (tryToLoginGtask(activity, authToken)) {
+                mLoggedin = true;
+            }
+        }
+
+        // try to login with google official url
+        if (!mLoggedin) {
+            mGetUrl = GTASK_GET_URL;
+            mPostUrl = GTASK_POST_URL;
+            if (!tryToLoginGtask(activity, authToken)) {
+                return false;
+            }
+        }
+
+        mLoggedin = true;
+        return true;
+    }
+
+    //loginGoogleAccount：用以具体实现登录Google账号的方法，方法返回账号令牌
+    private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
+        String authToken;
+        //AccountManager：账户管理器，辅助管理账户
+        AccountManager accountManager = AccountManager.get(activity);
+        Account[] accounts = accountManager.getAccountsByType("com.google");
+
+        if (accounts.length == 0) {
+            Log.e(TAG, "there is no available google account");
+            return null;
+        }
+
+        String accountName = NotesPreferenceActivity.getSyncAccountName(activity);
+        Account account = null;
+        for (Account a : accounts) {
+            if (a.name.equals(accountName)) {
+                account = a;
+                break;
+            }
+        }
+        if (account != null) {
+            mAccount = account;
+        } else {
+            Log.e(TAG, "unable to get an account with the same name in the settings");
+            return null;
+        }
+
+        // get the token now
+        AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,
+                "goanna_mobile", null, activity, null, null);
+        try {
+            Bundle authTokenBundle = accountManagerFuture.getResult();
+            authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);
+            if (invalidateToken) {
+                accountManager.invalidateAuthToken("com.google", authToken);
+                loginGoogleAccount(activity, false);
+            }
+        } catch (Exception e) {
+            Log.e(TAG, "get auth token failed");
+            authToken = null;
+        }
+
+        return authToken;
+    }
+    //尝试登陆Gtask，这只是一个预先判断令牌是否是有效以及是否能登上GTask的方法,而不是具体实现登陆的方法
+    private boolean tryToLoginGtask(Activity activity, String authToken) {
+        if (!loginGtask(authToken)) {
+            // maybe the auth token is out of date, now let's invalidate the
+            // token and try again
+            //删除过一个无效的authToken，申请一个新的后再次尝试登陆
+            authToken = loginGoogleAccount(activity, true);
+            if (authToken == null) {
+                Log.e(TAG, "login google account failed");
+                return false;
+            }
+
+            if (!loginGtask(authToken)) {
+                Log.e(TAG, "login gtask failed");
+                return false;
+            }
+        }
+        return true;
+    }
+    //实现登录Gtask的方法
+    private boolean loginGtask(String authToken) {
+        int timeoutConnection = 10000;
+        int timeoutSocket = 15000;
+        HttpParams httpParameters = new BasicHttpParams();
+        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
+        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
+        mHttpClient = new DefaultHttpClient(httpParameters);
+        BasicCookieStore localBasicCookieStore = new BasicCookieStore();
+        mHttpClient.setCookieStore(localBasicCookieStore);
+        HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
+
+        // login gtask
+        try {
+            String loginUrl = mGetUrl + "?auth=" + authToken;
+            HttpGet httpGet = new HttpGet(loginUrl);
+            HttpResponse response = null;
+            response = mHttpClient.execute(httpGet);
+
+            // get the cookie now
+            //获取CookieStore里存放的cookie,看如果存有“GTL(不知道什么意思)”，则说明有验证成功的有效的cookie
+            List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();
+            boolean hasAuthCookie = false;
+            for (Cookie cookie : cookies) {
+                if (cookie.getName().contains("GTL")) {
+                    hasAuthCookie = true;
+                }
+            }
+            if (!hasAuthCookie) {
+                Log.w(TAG, "it seems that there is no auth cookie");
+            }
+
+            // get the client version
+            //获取client的内容，具体操作是在返回的Content中截取从_setup(开始到)}</script>中间的字符串内容，也就是gtask_url的内容
+            String resString = getResponseContent(response.getEntity());
+            String jsBegin = "_setup(";
+            String jsEnd = ")}</script>";
+            int begin = resString.indexOf(jsBegin);
+            int end = resString.lastIndexOf(jsEnd);
+            String jsString = null;
+            if (begin != -1 && end != -1 && begin < end) {
+                jsString = resString.substring(begin + jsBegin.length(), end);
+            }
+            JSONObject js = new JSONObject(jsString);
+            mClientVersion = js.getLong("v");
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return false;
+        } catch (Exception e) {
+            // simply catch all exceptions
+            Log.e(TAG, "httpget gtask_url failed");
+            return false;
+        }
+
+        return true;
+    }
+
+    private int getActionId() {
+        return mActionId++;
+    }
+
+    //  实例化创建一个用于向网络传输数据的对象
+    //  使用HttpPost类
+    //  返回一个httpPost实例化对象，但里面还没有内容
+    private HttpPost createHttpPost() {
+        HttpPost httpPost = new HttpPost(mPostUrl);
+        httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
+        httpPost.setHeader("AT", "1");
+        return httpPost;
+    }
+    //通过URL获取响应后返回的数据，也就是网络上的数据和资源
+    //使用getContentEncoding()获取网络上的资源和数据
+    private String getResponseContent(HttpEntity entity) throws IOException {
+        String contentEncoding = null;
+        if (entity.getContentEncoding() != null) {//通过URL得到HttpEntity对象，如果不为空则使用getContent（）方法创建一个流将数据从网络都过来
+            contentEncoding = entity.getContentEncoding().getValue();
+            Log.d(TAG, "encoding: " + contentEncoding);
+        }
+
+        InputStream input = entity.getContent();
+        if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {//GZIP是使用DEFLATE进行压缩数据的另一个压缩库
+            input = new GZIPInputStream(entity.getContent());
+        } else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {//DEFLATE是一个无专利的压缩算法，它可以实现无损数据压缩
+            Inflater inflater = new Inflater(true);
+            input = new InflaterInputStream(entity.getContent(), inflater);
+        }
+
+        try {
+            InputStreamReader isr = new InputStreamReader(input);
+            BufferedReader br = new BufferedReader(isr);//是一个包装类，它可以包装字符流，将字符流放入缓存里，先把字符读到缓存里，到缓存满了时候，再读入内存，是为了提供读的效率而设计的
+            StringBuilder sb = new StringBuilder();
+
+            while (true) {
+                String buff = br.readLine();
+                if (buff == null) {
+                    return sb.toString();
+                }
+                sb = sb.append(buff);
+            }
+        } finally {
+            input.close();
+        }
+    }
+    //请求的具体内容在json的实例化对象js中然后传入,利用UrlEncodedFormEntity entity和httpPost.setEntity(entity)方法把js中的内容放置到httpPost中
+    private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
+        if (!mLoggedin) {
+            Log.e(TAG, "please login first");
+            throw new ActionFailureException("not logged in");
+        }
+
+        //实例化一个httpPost的对象用来向服务器传输数据，在这里就是发送请求，而请求的内容在js里
+        HttpPost httpPost = createHttpPost();
+        try {
+            LinkedList<BasicNameValuePair> list = new LinkedList<BasicNameValuePair>();
+            list.add(new BasicNameValuePair("r", js.toString()));
+            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8"); //UrlEncodedFormEntity()的形式比较单一，是普通的键值对
+            httpPost.setEntity(entity);
+
+            // execute the post
+            //执行这个请求
+            原文链接：https://blog.csdn.net/edgarrr/article/details/127608537
+            HttpResponse response = mHttpClient.execute(httpPost);
+            String jsString = getResponseContent(response.getEntity());
+            return new JSONObject(jsString);
+
+        } catch (ClientProtocolException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new NetworkFailureException("postRequest failed");
+        } catch (IOException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new NetworkFailureException("postRequest failed");
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("unable to convert response content to jsonobject");
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("error occurs when posting request");
+        }
+    }
+
+    //创建单个任务
+    //传入参数是一个.gtask.data.Task包里Task类的对象利用json获取Task里的内容,并且创建相应的jsPost
+    public void createTask(Task task) throws NetworkFailureException {
+        commitUpdate();
+        try {
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+
+            // action_list
+            actionList.put(task.getCreateAction(getActionId()));
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            // post
+            JSONObject jsResponse = postRequest(jsPost);
+            JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
+                    GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
+            task.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("create task: handing jsonobject failed");
+        }
+    }
+    //创建一个任务列表，与createTask几乎一样，区别就是最后设置的是tasklist的gid
+    public void createTaskList(TaskList tasklist) throws NetworkFailureException {
+        commitUpdate();
+        try {
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+
+            // action_list
+            actionList.put(tasklist.getCreateAction(getActionId()));
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            // post
+            JSONObject jsResponse = postRequest(jsPost);
+            JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
+                    GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
+            tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("create tasklist: handing jsonobject failed");
+        }
+    }
+
+    //同步更新操作
+    //使用JSONObject进行数据存储，使用jsPost.put，Put的信息包括UpdateArray和ClientVersion
+    public void commitUpdate() throws NetworkFailureException {
+        if (mUpdateArray != null) {
+            try {
+                JSONObject jsPost = new JSONObject();
+
+                // action_list
+                jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
+
+                // client_version
+                jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+                postRequest(jsPost);
+                mUpdateArray = null;
+            } catch (JSONException e) {
+                Log.e(TAG, e.toString());
+                e.printStackTrace();
+                throw new ActionFailureException("commit update: handing jsonobject failed");
+            }
+        }
+    }
+
+    //添加更新的事项
+    //调用commitUpdate()实现
+    public void addUpdateNode(Node node) throws NetworkFailureException {
+        if (node != null) {
+            // too many update items may result in an error
+            // set max to 10 items
+            if (mUpdateArray != null && mUpdateArray.length() > 10) {
+                commitUpdate();
+            }
+
+            if (mUpdateArray == null)
+                mUpdateArray = new JSONArray();
+            mUpdateArray.put(node.getUpdateAction(getActionId()));
+        }
+    }
+    //移动task,比如讲task移动到不同的task列表中去
+    //通过getGid获取task所属列表的gid
+    //通过JSONObject.put(String name, Object value)函数设置移动后的task的相关属性值，从而达到移动的目的
+    //最后还是通过postRequest进行更新后的发送
+    public void moveTask(Task task, TaskList preParent, TaskList curParent)
+            throws NetworkFailureException {
+        commitUpdate();
+        try {
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+            JSONObject action = new JSONObject();
+
+            // action_list
+            //设置优先级ID，只有当移动是发生在文件中
+            action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
+        }
+        action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());  //设置移动前所属列表
+        action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());  //设置当前所属列表
+            if (preParent == curParent && task.getPriorSibling() != null) {
+                // put prioring_sibing_id only if moving within the tasklist and
+                // it is not the first one
+                action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
+            }
+            action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
+            action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
+            if (preParent != curParent) {
+                // put the dest_list only if moving between tasklists
+                action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
+            }
+            actionList.put(action);
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            postRequest(jsPost);
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("move task: handing jsonobject failed");
+        }
+    }
+
+    /*
+     * 删除操作节点
+     * 还是利用JSON
+     * 删除过后使用postRequest发送删除后的结果
+     */
+    public void deleteNode(Node node) throws NetworkFailureException {
+        commitUpdate();
+        try {
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+
+            // action_list
+            node.setDeleted(true);
+            actionList.put(node.getUpdateAction(getActionId()));
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            postRequest(jsPost);
+            mUpdateArray = null;
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("delete node: handing jsonobject failed");
+        }
+    }
+
+    /*
+     * 获取任务列表
+     * 首先通过GetURI使用getResponseContent从网上获取数据
+     * 然后筛选出"_setup("到)}</script>的部分，并且从中获取GTASK_JSON_LISTS的内容返回
+     */
+    public JSONArray getTaskLists() throws NetworkFailureException {
+        if (!mLoggedin) {
+            Log.e(TAG, "please login first");
+            throw new ActionFailureException("not logged in");
+        }
+
+        try {
+            HttpGet httpGet = new HttpGet(mGetUrl);
+            HttpResponse response = null;
+            response = mHttpClient.execute(httpGet);
+
+            // get the task list
+            //筛选工作，把筛选出的字符串放入jsString
+            String resString = getResponseContent(response.getEntity());
+            String jsBegin = "_setup(";
+            String jsEnd = ")}</script>";
+            int begin = resString.indexOf(jsBegin);
+            int end = resString.lastIndexOf(jsEnd);
+            String jsString = null;
+            if (begin != -1 && end != -1 && begin < end) {
+                jsString = resString.substring(begin + jsBegin.length(), end);
+            }
+            JSONObject js = new JSONObject(jsString);
+            return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);
+        } catch (ClientProtocolException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new NetworkFailureException("gettasklists: httpget failed");
+        } catch (IOException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new NetworkFailureException("gettasklists: httpget failed");
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("get task lists: handing jasonobject failed");
+        }
+    }
+    //通过传入的TASKList的gid,从网络上获取相应属于这个任务列表的任务
+    public JSONArray getTaskList(String listGid) throws NetworkFailureException {
+        commitUpdate();
+        try {
+            JSONObject jsPost = new JSONObject();
+            JSONArray actionList = new JSONArray();
+            JSONObject action = new JSONObject();
+
+            // action_list
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
+            action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);
+            action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
+            actionList.put(action);
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+
+            // client_version
+            jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
+
+            JSONObject jsResponse = postRequest(jsPost);
+            return jsResponse.getJSONArray(GTaskStringUtils.GTASK_JSON_TASKS);
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("get task list: handing jsonobject failed");
+        }
+    }
+
+    public Account getSyncAccount() {
+        return mAccount;
+    }
+    //重置更新的内容
+    public void resetUpdateArray() {
+        mUpdateArray = null;
+    }
+}

other/06_210340049葛朋林_代码标注/GTaskManager.java

@@ -0,0 +1,846 @@
+package net.micode.notes.gtask.remote;
+
+public class GTaskManager {
+    private static final String TAG = GTaskManager.class.getSimpleName();
+    public static final int STATE_SUCCESS = 0;
+    public static final int STATE_NETWORK_ERROR = 1;
+    public static final int STATE_INTERNAL_ERROR = 2;
+    public static final int STATE_SYNC_IN_PROGRESS = 3;
+    public static final int STATE_SYNC_CANCELLED = 4;
+    private static GTaskManager mInstance = null;
+
+    private Activity mActivity;
+    private Context mContext;
+    private ContentResolver mContentResolver;
+    private boolean mSyncing;
+    private boolean mCancelled;
+    private HashMap<String, TaskList> mGTaskListHashMap;
+    private HashMap<String, Node> mGTaskHashMap;
+    private HashMap<String, MetaData> mMetaHashMap;
+    private TaskList mMetaList;
+    private HashSet<Long> mLocalDeleteIdMap;
+    private HashMap<String, Long> mGidToNid;
+    private HashMap<Long, String> mNidToGid;
+
+    private GTaskManager() {                                   //对象初始化函数
+        mSyncing = false;                                      //正在同步,flase代表未执行
+        mCancelled = false;                                    //全局标识，flase代表可以执行
+        mGTaskListHashMap = new HashMap<String, TaskList>();   //<>代表Java的泛型,就是创建一个用类型作为参数的类。
+        mGTaskHashMap = new HashMap<String, Node>();
+        mMetaHashMap = new HashMap<String, MetaData>();
+        mMetaList = null;
+        mLocalDeleteIdMap = new HashSet<Long>();
+        mGidToNid = new HashMap<String, Long>();    //GoogleID to NodeID??
+        mNidToGid = new HashMap<Long, String>();    //NodeID to GoogleID???通过hashmap散列表建立映射
+    }
+
+    /**
+     * 包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下。
+     * 功能：类初始化函数
+     * @author TTS
+     * @return GtaskManger
+     */
+    public static synchronized GTaskManager getInstance() {    //可能运行在多线程环境下，使用语言级同步--synchronized
+        if (mInstance == null) {
+            mInstance = new GTaskManager();
+        }
+        return mInstance;
+    }
+
+    /**
+     * 包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下。
+     * @author TTS
+     * @param activity
+     */
+    public synchronized void setActivityContext(Activity activity) {
+        // used for getting auth token
+        mActivity = activity;
+    }
+
+    /**
+     * 核心函数
+     * 功能：实现了本地同步操作和远端同步操作
+     * @author TTS
+     * @param context-----获取上下文
+     * @param asyncTask-------用于同步的异步操作类
+     * @return int
+     */
+    public int sync(Context context, GTaskASyncTask asyncTask) {           //核心函数
+        if (mSyncing) {
+            Log.d(TAG, "Sync is in progress");                       //创建日志文件（调试信息），debug
+            return STATE_SYNC_IN_PROGRESS;
+        }
+        mContext = context;
+        mContentResolver = mContext.getContentResolver();
+        mSyncing = true;
+        mCancelled = false;
+        mGTaskListHashMap.clear();
+        mGTaskHashMap.clear();
+        mMetaHashMap.clear();
+        mLocalDeleteIdMap.clear();
+        mGidToNid.clear();
+        mNidToGid.clear();
+
+        try {
+            GTaskClient client = GTaskClient.getInstance();    //getInstance即为创建一个实例,client--客户机
+            client.resetUpdateArray();     //JSONArray类型，reset即置为NULL
+
+            // login google task
+            if (!mCancelled) {
+                if (!client.login(mActivity)) {
+                    throw new NetworkFailureException("login google task failed");
+                }
+            }
+
+            // get the task list from google
+            asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
+            initGTaskList();                                 //获取Google上的JSONtasklist转为本地TaskList
+
+            // do content sync work
+            asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
+            syncContent();
+        } catch (NetworkFailureException e) {                       //分为两种异常，此类异常为网络异常
+            Log.e(TAG, e.toString());                             //创建日志文件（调试信息），error
+            return STATE_NETWORK_ERROR;
+        } catch (ActionFailureException e) {                        //此类异常为操作异常
+            Log.e(TAG, e.toString());
+            return STATE_INTERNAL_ERROR;
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return STATE_INTERNAL_ERROR;
+        } finally {
+            mGTaskListHashMap.clear();
+            mGTaskHashMap.clear();
+            mMetaHashMap.clear();
+            mLocalDeleteIdMap.clear();
+            mGidToNid.clear();
+            mNidToGid.clear();
+            mSyncing = false;
+        }
+
+        return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
+    }
+
+    /**
+     *功能：初始化GtaskList，获取Google上的JSONtasklist转为本地TaskList。
+     *获得的数据存储在mMetaList，mGTaskListHashMap，mGTaskHashMap
+     *@author TTS
+     *@exception NetworkFailureException
+     *@return void
+     */
+    private void initGTaskList() throws NetworkFailureException {
+        if (mCancelled)
+            return;
+        GTaskClient client = GTaskClient.getInstance();    //getInstance即为创建一个实例，client应指远端客户机
+        try {
+            //Json对象是Name Value对(即子元素)的无序集合，相当于一个Map对象。JsonObject类是bantouyan-json库对Json对象的抽象，提供操纵Json对象的各种方法。
+            //其格式为{"key1":value1,"key2",value2....};key 必须是字符串。
+            //因为ajax请求不刷新页面，但配合js可以实现局部刷新，因此json常常被用来作为异步请求的返回对象使用。
+            JSONArray jsTaskLists = client.getTaskLists();     //原注释为get task list------lists？？？
+
+            // init meta list first
+            mMetaList = null;                                       //TaskList类型
+            for (int i = 0; i < jsTaskLists.length(); i++) {
+                JSONObject object = jsTaskLists.getJSONObject(i);  //JSONObject与JSONArray一个为对象，一个为数组。此处取出单个JASONObject
+                String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
+                String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
+
+                if (name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
+                    mMetaList = new TaskList();                    //MetaList意为元表,Tasklist类型，此处为初始化
+                    mMetaList.setContentByRemoteJSON(object);      //将JSON中部分数据复制到自己定义的对象中相对应的数据：name->mname...
+
+                    // load meta data
+                    JSONArray jsMetas = client.getTaskList(gid);   //原注释为get action_list------list？？？
+                    for (int j = 0; j < jsMetas.length(); j++) {
+                        object = (JSONObject) jsMetas.getJSONObject(j);
+                        MetaData metaData = new MetaData();            //继承自Node
+                        metaData.setContentByRemoteJSON(object);
+                        if (metaData.isWorthSaving()) {                             //if not worth to save，metadata将不加入mMetaList
+                            mMetaList.addChildTask(metaData);
+                            if (metaData.getGid() != null) {
+                                mMetaHashMap.put(metaData.getRelatedGid(), metaData);
+                            }
+                        }
+                    }
+                }
+            }
+
+            // create meta list if not existed
+            if (mMetaList == null) {
+                mMetaList = new TaskList();
+                mMetaList.setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                        + GTaskStringUtils.FOLDER_META);
+                GTaskClient.getInstance().createTaskList(mMetaList);
+            }
+
+            // init task list
+            for (int i = 0; i < jsTaskLists.length(); i++) {
+                JSONObject object = jsTaskLists.getJSONObject(i);
+                String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);  //通过getString函数传入本地某个标志数据的名称，获取其在远端的名称。
+                String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
+
+                if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
+                        && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                        + GTaskStringUtils.FOLDER_META)) {
+                    TaskList tasklist = new TaskList();     //继承自Node
+                    tasklist.setContentByRemoteJSON(object);
+                    mGTaskListHashMap.put(gid, tasklist);
+                    mGTaskHashMap.put(gid, tasklist);          //为什么加两遍？？？
+
+                    // load tasks
+                    JSONArray jsTasks = client.getTaskList(gid);
+                    for (int j = 0; j < jsTasks.length(); j++) {
+                        object = (JSONObject) jsTasks.getJSONObject(j);
+                        gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
+                        Task task = new Task();
+                        task.setContentByRemoteJSON(object);
+                        if (task.isWorthSaving()) {
+                            task.setMetaInfo(mMetaHashMap.get(gid));
+                            tasklist.addChildTask(task);
+                            mGTaskHashMap.put(gid, task);
+                        }
+                    }
+                }
+            }
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("initGTaskList: handing JSONObject failed");
+        }
+    }
+
+    /**
+     * 功能：本地内容同步操作
+     * @throws NetworkFailureException
+     * @return 无返回值
+     */
+    private void syncContent() throws NetworkFailureException {    //本地内容同步操作
+        int syncType;
+        Cursor c = null;                                           //数据库指针
+        String gid;                                                //GoogleID??
+        Node node;                                                 //Node包含Sync_Action的不同类型
+
+        mLocalDeleteIdMap.clear();                                 //HashSet<Long>类型
+
+        if (mCancelled) {
+            return;
+        }
+
+        // for local deleted note
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+                    "(type<>? AND parent_id=?)", new String[] {
+                            String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, null);
+            if (c != null) {
+                while (c.moveToNext()) {
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        doContentSync(Node.SYNC_ACTION_DEL_REMOTE, node, c);
+                    }
+
+                    mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
+                }
+            } else {
+                Log.w(TAG, "failed to query trash folder");
+            }
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+
+        // sync folder first
+        syncFolder();
+
+        // for note existing in database
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+                    "(type=? AND parent_id<>?)", new String[] {
+                            String.valueOf(Notes.TYPE_NOTE), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, NoteColumns.TYPE + " DESC");
+            if (c != null) {
+                while (c.moveToNext()) {
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));   //通过hashmap建立联系
+                        mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);   //通过hashmap建立联系
+                        syncType = node.getSyncAction(c);
+                    } else {
+                        if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
+                            // local add
+                            syncType = Node.SYNC_ACTION_ADD_REMOTE;
+                        } else {
+                            // remote delete
+                            syncType = Node.SYNC_ACTION_DEL_LOCAL;
+                        }
+                    }
+                    doContentSync(syncType, node, c);
+                }
+            } else {
+                Log.w(TAG, "failed to query existing note in database");
+            }
+
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+
+        // go through remaining items
+        Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator();   //Iterator迭代器
+        while (iter.hasNext()) {
+            Map.Entry<String, Node> entry = iter.next();
+            node = entry.getValue();
+            doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
+        }
+
+        // mCancelled can be set by another thread, so we neet to check one by    //thread----线程
+        // one
+        // clear local delete table
+        if (!mCancelled) {
+            if (!DataUtils.batchDeleteNotes(mContentResolver, mLocalDeleteIdMap)) {
+                throw new ActionFailureException("failed to batch-delete local deleted notes");
+            }
+        }
+
+        // refresh local sync id
+        if (!mCancelled) {
+            GTaskClient.getInstance().commitUpdate();
+            refreshLocalSyncId();
+        }
+
+    }
+
+    /**
+     * 功能：
+     * @author TTS
+     * @throws NetworkFailureException
+     */
+    private void syncFolder() throws NetworkFailureException {
+        Cursor c = null;
+        String gid;
+        Node node;
+        int syncType;
+
+        if (mCancelled) {
+            return;
+        }
+
+        // for root folder
+        try {
+            c = mContentResolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
+                    Notes.ID_ROOT_FOLDER), SqlNote.PROJECTION_NOTE, null, null, null);
+            if (c != null) {
+                c.moveToNext();
+                gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                node = mGTaskHashMap.get(gid);
+                if (node != null) {
+                    mGTaskHashMap.remove(gid);
+                    mGidToNid.put(gid, (long) Notes.ID_ROOT_FOLDER);
+                    mNidToGid.put((long) Notes.ID_ROOT_FOLDER, gid);
+                    // for system folder, only update remote name if necessary
+                    if (!node.getName().equals(
+                            GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT))
+                        doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
+                } else {
+                    doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
+                }
+            } else {
+                Log.w(TAG, "failed to query root folder");
+            }
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+
+        // for call-note folder
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)",
+                    new String[] {
+                            String.valueOf(Notes.ID_CALL_RECORD_FOLDER)
+                    }, null);
+            if (c != null) {
+                if (c.moveToNext()) {
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        mGidToNid.put(gid, (long) Notes.ID_CALL_RECORD_FOLDER);
+                        mNidToGid.put((long) Notes.ID_CALL_RECORD_FOLDER, gid);
+                        // for system folder, only update remote name if
+                        // necessary
+                        if (!node.getName().equals(
+                                GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                                        + GTaskStringUtils.FOLDER_CALL_NOTE))
+                            doContentSync(Node.SYNC_ACTION_UPDATE_REMOTE, node, c);
+                    } else {
+                        doContentSync(Node.SYNC_ACTION_ADD_REMOTE, node, c);
+                    }
+                }
+            } else {
+                Log.w(TAG, "failed to query call note folder");
+            }
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+
+        // for local existing folders
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+                    "(type=? AND parent_id<>?)", new String[] {
+                            String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, NoteColumns.TYPE + " DESC");
+            if (c != null) {
+                while (c.moveToNext()) {
+                    gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));
+                        mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
+                        syncType = node.getSyncAction(c);
+                    } else {
+                        if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
+                            // local add
+                            syncType = Node.SYNC_ACTION_ADD_REMOTE;
+                        } else {
+                            // remote delete
+                            syncType = Node.SYNC_ACTION_DEL_LOCAL;
+                        }
+                    }
+                    doContentSync(syncType, node, c);
+                }
+            } else {
+                Log.w(TAG, "failed to query existing folder");
+            }
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+
+        // for remote add folders
+        Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
+        while (iter.hasNext()) {
+            Map.Entry<String, TaskList> entry = iter.next();
+            gid = entry.getKey();
+            node = entry.getValue();
+            if (mGTaskHashMap.containsKey(gid)) {
+                mGTaskHashMap.remove(gid);
+                doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
+            }
+        }
+
+        if (!mCancelled)
+            GTaskClient.getInstance().commitUpdate();
+    }
+
+    /**
+     * 功能：syncType分类，addLocalNode，addRemoteNode，deleteNode，updateLocalNode，updateRemoteNode
+     * @author TTS
+     * @param syncType
+     * @param node
+     * @param c
+     * @throws NetworkFailureException
+     */
+    private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException {
+        if (mCancelled) {
+            return;
+        }
+
+        MetaData meta;
+        switch (syncType) {
+            case Node.SYNC_ACTION_ADD_LOCAL:
+                addLocalNode(node);
+                break;
+            case Node.SYNC_ACTION_ADD_REMOTE:
+                addRemoteNode(node, c);
+                break;
+            case Node.SYNC_ACTION_DEL_LOCAL:
+                meta = mMetaHashMap.get(c.getString(SqlNote.GTASK_ID_COLUMN));
+                if (meta != null) {
+                    GTaskClient.getInstance().deleteNode(meta);
+                }
+                mLocalDeleteIdMap.add(c.getLong(SqlNote.ID_COLUMN));
+                break;
+            case Node.SYNC_ACTION_DEL_REMOTE:
+                meta = mMetaHashMap.get(node.getGid());
+                if (meta != null) {
+                    GTaskClient.getInstance().deleteNode(meta);
+                }
+                GTaskClient.getInstance().deleteNode(node);
+                break;
+            case Node.SYNC_ACTION_UPDATE_LOCAL:
+                updateLocalNode(node, c);
+                break;
+            case Node.SYNC_ACTION_UPDATE_REMOTE:
+                updateRemoteNode(node, c);
+                break;
+            case Node.SYNC_ACTION_UPDATE_CONFLICT:
+                // merging both modifications maybe a good idea
+                // right now just use local update simply
+                updateRemoteNode(node, c);
+                break;
+            case Node.SYNC_ACTION_NONE:
+                break;
+            case Node.SYNC_ACTION_ERROR:
+            default:
+                throw new ActionFailureException("unkown sync action type");
+        }
+    }
+
+    /**
+     * 功能：本地增加Node
+     * @author TTS
+     * @param node
+     * @throws NetworkFailureException
+     */
+    private void addLocalNode(Node node) throws NetworkFailureException {
+        if (mCancelled) {
+            return;
+        }
+
+        SqlNote sqlNote;
+        if (node instanceof TaskList) {
+            if (node.getName().equals(
+                    GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT)) {
+                sqlNote = new SqlNote(mContext, Notes.ID_ROOT_FOLDER);
+            } else if (node.getName().equals(
+                    GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_CALL_NOTE)) {
+                sqlNote = new SqlNote(mContext, Notes.ID_CALL_RECORD_FOLDER);
+            } else {
+                sqlNote = new SqlNote(mContext);
+                sqlNote.setContent(node.getLocalJSONFromContent());
+                sqlNote.setParentId(Notes.ID_ROOT_FOLDER);
+            }
+        } else {
+            sqlNote = new SqlNote(mContext);
+            JSONObject js = node.getLocalJSONFromContent();
+            try {
+                if (js.has(GTaskStringUtils.META_HEAD_NOTE)) {
+                    JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+                    if (note.has(NoteColumns.ID)) {
+                        long id = note.getLong(NoteColumns.ID);
+                        if (DataUtils.existInNoteDatabase(mContentResolver, id)) {
+                            // the id is not available, have to create a new one
+                            note.remove(NoteColumns.ID);
+                        }
+                    }
+                }
+
+                if (js.has(GTaskStringUtils.META_HEAD_DATA)) {
+                    JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+                    for (int i = 0; i < dataArray.length(); i++) {
+                        JSONObject data = dataArray.getJSONObject(i);
+                        if (data.has(DataColumns.ID)) {
+                            long dataId = data.getLong(DataColumns.ID);
+                            if (DataUtils.existInDataDatabase(mContentResolver, dataId)) {
+                                // the data id is not available, have to create
+                                // a new one
+                                data.remove(DataColumns.ID);
+                            }
+                        }
+                    }
+
+                }
+            } catch (JSONException e) {
+                Log.w(TAG, e.toString());
+                e.printStackTrace();
+            }
+            sqlNote.setContent(js);
+
+            Long parentId = mGidToNid.get(((Task) node).getParent().getGid());
+            if (parentId == null) {
+                Log.e(TAG, "cannot find task's parent id locally");
+                throw new ActionFailureException("cannot add local node");
+            }
+            sqlNote.setParentId(parentId.longValue());
+        }
+
+        // create the local node
+        sqlNote.setGtaskId(node.getGid());
+        sqlNote.commit(false);
+
+        // update gid-nid mapping
+        mGidToNid.put(node.getGid(), sqlNote.getId());
+        mNidToGid.put(sqlNote.getId(), node.getGid());
+
+        // update meta
+        updateRemoteMeta(node.getGid(), sqlNote);
+    }
+
+    /**
+     * 功能：update本地node
+     * @author TTS
+     * @param node
+     * ----同步操作的基础数据类型
+     * @param c
+     * ----Cursor
+     * @throws NetworkFailureException
+     */
+    private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException {
+        if (mCancelled) {
+            return;
+        }
+
+        SqlNote sqlNote;
+        // update the note locally
+        sqlNote = new SqlNote(mContext, c);
+        sqlNote.setContent(node.getLocalJSONFromContent());
+
+        Long parentId = (node instanceof Task) ? mGidToNid.get(((Task) node).getParent().getGid())
+                : new Long(Notes.ID_ROOT_FOLDER);
+        if (parentId == null) {
+            Log.e(TAG, "cannot find task's parent id locally");
+            throw new ActionFailureException("cannot update local node");
+        }
+        sqlNote.setParentId(parentId.longValue());
+        sqlNote.commit(true);
+
+        // update meta info
+        updateRemoteMeta(node.getGid(), sqlNote);
+    }
+
+    /**
+     * 功能：远程增加Node
+     * 需要updateRemoteMeta
+     * @author TTS
+     * @param node
+     * ----同步操作的基础数据类型
+     * @param c
+     * --Cursor
+     * @throws NetworkFailureException
+     */
+    private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException {
+        if (mCancelled) {
+            return;
+        }
+
+        SqlNote sqlNote = new SqlNote(mContext, c);     //从本地mContext中获取内容
+        Node n;
+
+        // update remotely
+        if (sqlNote.isNoteType()) {
+            Task task = new Task();
+            task.setContentByLocalJSON(sqlNote.getContent());
+
+            String parentGid = mNidToGid.get(sqlNote.getParentId());
+            if (parentGid == null) {
+                Log.e(TAG, "cannot find task's parent tasklist");           //调试信息
+                throw new ActionFailureException("cannot add remote task");
+            }
+            mGTaskListHashMap.get(parentGid).addChildTask(task);            //在本地生成的GTaskList中增加子结点
+
+            //登录远程服务器，创建Task
+            GTaskClient.getInstance().createTask(task);
+            n = (Node) task;
+
+            // add meta
+            updateRemoteMeta(task.getGid(), sqlNote);
+        } else {
+            TaskList tasklist = null;
+
+            // we need to skip folder if it has already existed
+            String folderName = GTaskStringUtils.MIUI_FOLDER_PREFFIX;
+            if (sqlNote.getId() == Notes.ID_ROOT_FOLDER)
+                folderName += GTaskStringUtils.FOLDER_DEFAULT;
+            else if (sqlNote.getId() == Notes.ID_CALL_RECORD_FOLDER)
+                folderName += GTaskStringUtils.FOLDER_CALL_NOTE;
+            else
+                folderName += sqlNote.getSnippet();
+
+            //iterator迭代器，通过统一的接口迭代所有的map元素
+            Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
+            while (iter.hasNext()) {
+                Map.Entry<String, TaskList> entry = iter.next();
+                String gid = entry.getKey();
+                TaskList list = entry.getValue();
+
+                if (list.getName().equals(folderName)) {
+                    tasklist = list;
+                    if (mGTaskHashMap.containsKey(gid)) {
+                        mGTaskHashMap.remove(gid);
+                    }
+                    break;
+                }
+            }
+
+            // no match we can add now
+            if (tasklist == null) {
+                tasklist = new TaskList();
+                tasklist.setContentByLocalJSON(sqlNote.getContent());
+                GTaskClient.getInstance().createTaskList(tasklist);
+                mGTaskListHashMap.put(tasklist.getGid(), tasklist);
+            }
+            n = (Node) tasklist;
+        }
+
+        // update local note
+        sqlNote.setGtaskId(n.getGid());
+        sqlNote.commit(false);
+        sqlNote.resetLocalModified();
+        sqlNote.commit(true);
+
+        // gid-id mapping                                             //创建id间的映射
+        mGidToNid.put(n.getGid(), sqlNote.getId());
+        mNidToGid.put(sqlNote.getId(), n.getGid());
+    }
+
+    /**
+     * 功能：更新远端的Node，包含meta更新(updateRemoteMeta)
+     * @author TTS
+     * @param node
+     * ----同步操作的基础数据类型
+     * @param c
+     *  --Cursor
+     * @throws NetworkFailureException
+     */
+    private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException {
+        if (mCancelled) {
+            return;
+        }
+
+        SqlNote sqlNote = new SqlNote(mContext, c);
+
+        // update remotely
+        node.setContentByLocalJSON(sqlNote.getContent());
+        GTaskClient.getInstance().addUpdateNode(node);                                //GTaskClient用途为从本地登陆远端服务器 
+
+        // update meta
+        updateRemoteMeta(node.getGid(), sqlNote);
+
+        // move task if necessary
+        if (sqlNote.isNoteType()) {
+            Task task = (Task) node;
+            TaskList preParentList = task.getParent();
+            //preParentList为通过node获取的父节点列表
+
+            String curParentGid = mNidToGid.get(sqlNote.getParentId());
+            //curParentGid为通过光标在数据库中找到sqlNote的mParentId，再通过mNidToGid由long类型转为String类型的Gid
+
+            if (curParentGid == null) {
+                Log.e(TAG, "cannot find task's parent tasklist");
+                throw new ActionFailureException("cannot update remote task");
+            }
+            TaskList curParentList = mGTaskListHashMap.get(curParentGid);
+            //通过HashMap找到对应Gid的TaskList
+
+            if (preParentList != curParentList) {                                          //?????????????
+                preParentList.removeChildTask(task);
+                curParentList.addChildTask(task);
+                GTaskClient.getInstance().moveTask(task, preParentList, curParentList);
+            }
+        }
+
+        // clear local modified flag
+        sqlNote.resetLocalModified();
+        //commit到本地数据库
+        sqlNote.commit(true);
+    }
+
+    /**
+     * 功能：升级远程meta。  meta---元数据----计算机文件系统管理数据---管理数据的数据。
+     * @author TTS
+     * @param gid
+     * ---GoogleID为String类型
+     * @param sqlNote
+     * ---同步前的数据库操作，故使用类SqlNote
+     * @throws NetworkFailureException
+     */
+    private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException {
+        if (sqlNote != null && sqlNote.isNoteType()) {
+            MetaData metaData = mMetaHashMap.get(gid);
+            if (metaData != null) {
+                metaData.setMeta(gid, sqlNote.getContent());
+                GTaskClient.getInstance().addUpdateNode(metaData);
+            } else {
+                metaData = new MetaData();
+                metaData.setMeta(gid, sqlNote.getContent());
+                mMetaList.addChildTask(metaData);
+                mMetaHashMap.put(gid, metaData);
+                GTaskClient.getInstance().createTask(metaData);
+            }
+        }
+    }
+
+    /**
+     * 功能：刷新本地，给sync的ID对应上最后更改过的对象
+     * @author TTS
+     * @return void
+     * @throws NetworkFailureException
+     */
+    private void refreshLocalSyncId() throws NetworkFailureException {
+        if (mCancelled) {
+            return;
+        }
+
+        // get the latest gtask list                                               //获取最近的（最晚的）gtask list
+        mGTaskHashMap.clear();
+        mGTaskListHashMap.clear();
+        mMetaHashMap.clear();
+        initGTaskList();
+
+        Cursor c = null;
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
+                    "(type<>? AND parent_id<>?)", new String[] {
+                            String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
+                    }, NoteColumns.TYPE + " DESC");                                                 //query语句：五个参数，NoteColumns.TYPE + " DESC"-----为按类型递减顺序返回查询结果。new String[] {String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)}------为选择参数。"(type<>? AND parent_id<>?)"-------指明返回行过滤器。SqlNote.PROJECTION_NOTE--------应返回的数据列的名字。Notes.CONTENT_NOTE_URI--------contentProvider包含所有数据集所对应的uri
+            if (c != null) {
+                while (c.moveToNext()) {
+                    String gid = c.getString(SqlNote.GTASK_ID_COLUMN);
+                    Node node = mGTaskHashMap.get(gid);
+                    if (node != null) {
+                        mGTaskHashMap.remove(gid);
+                        ContentValues values = new ContentValues();                     //在ContentValues中创建键值对。准备通过contentResolver写入数据
+                        values.put(NoteColumns.SYNC_ID, node.getLastModified());
+                        mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,   //进行批量更改，选择参数为NULL，应该可以用insert替换，参数分别为表名和需要更新的value对象。
+                                c.getLong(SqlNote.ID_COLUMN)), values, null, null);
+                    } else {
+                        Log.e(TAG, "something is missed");
+                        throw new ActionFailureException(
+                                "some local items don't have gid after sync");
+                    }
+                }
+            } else {
+                Log.w(TAG, "failed to query local note to refresh sync id");
+            }
+        } finally {
+            if (c != null) {
+                c.close();
+                c = null;
+            }
+        }
+    }
+
+    /**
+     * 功能：获取同步账号,mAccount.name
+     * @author TTS
+     * @return String
+     */
+    public String getSyncAccount() {
+        return GTaskClient.getInstance().getSyncAccount().name;
+    }
+
+    /**
+     * 功能：取消同步，置mCancelled为true
+     * @author TTS
+     */
+    public void cancelSync() {
+        mCancelled = true;
+    }
+}

other/06_210340049葛朋林_代码标注/GTaskStringUtils.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package net.micode.notes.tool;
+//这个类就是定义了一堆static string，实际就是为jsonObject提供Key，把这些定义全部写到一个类里，方便查看管理，是一个非常好的编程习惯
+public class GTaskStringUtils {
+
+    public final static String GTASK_JSON_ACTION_ID = "action_id";
+
+    public final static String GTASK_JSON_ACTION_LIST = "action_list";
+
+    public final static String GTASK_JSON_ACTION_TYPE = "action_type";
+
+    public final static String GTASK_JSON_ACTION_TYPE_CREATE = "create";
+
+    public final static String GTASK_JSON_ACTION_TYPE_GETALL = "get_all";
+
+    public final static String GTASK_JSON_ACTION_TYPE_MOVE = "move";
+
+    public final static String GTASK_JSON_ACTION_TYPE_UPDATE = "update";
+
+    public final static String GTASK_JSON_CREATOR_ID = "creator_id";
+
+    public final static String GTASK_JSON_CHILD_ENTITY = "child_entity";
+
+    public final static String GTASK_JSON_CLIENT_VERSION = "client_version";
+
+    public final static String GTASK_JSON_COMPLETED = "completed";
+
+    public final static String GTASK_JSON_CURRENT_LIST_ID = "current_list_id";
+
+    public final static String GTASK_JSON_DEFAULT_LIST_ID = "default_list_id";
+
+    public final static String GTASK_JSON_DELETED = "deleted";
+
+    public final static String GTASK_JSON_DEST_LIST = "dest_list";
+
+    public final static String GTASK_JSON_DEST_PARENT = "dest_parent";
+
+    public final static String GTASK_JSON_DEST_PARENT_TYPE = "dest_parent_type";
+
+    public final static String GTASK_JSON_ENTITY_DELTA = "entity_delta";
+
+    public final static String GTASK_JSON_ENTITY_TYPE = "entity_type";
+
+    public final static String GTASK_JSON_GET_DELETED = "get_deleted";
+
+    public final static String GTASK_JSON_ID = "id";
+
+    public final static String GTASK_JSON_INDEX = "index";
+
+    public final static String GTASK_JSON_LAST_MODIFIED = "last_modified";
+
+    public final static String GTASK_JSON_LATEST_SYNC_POINT = "latest_sync_point";
+
+    public final static String GTASK_JSON_LIST_ID = "list_id";
+
+    public final static String GTASK_JSON_LISTS = "lists";
+
+    public final static String GTASK_JSON_NAME = "name";
+
+    public final static String GTASK_JSON_NEW_ID = "new_id";
+
+    public final static String GTASK_JSON_NOTES = "notes";
+
+    public final static String GTASK_JSON_PARENT_ID = "parent_id";
+
+    public final static String GTASK_JSON_PRIOR_SIBLING_ID = "prior_sibling_id";
+
+    public final static String GTASK_JSON_RESULTS = "results";
+
+    public final static String GTASK_JSON_SOURCE_LIST = "source_list";
+
+    public final static String GTASK_JSON_TASKS = "tasks";
+
+    public final static String GTASK_JSON_TYPE = "type";
+
+    public final static String GTASK_JSON_TYPE_GROUP = "GROUP";
+
+    public final static String GTASK_JSON_TYPE_TASK = "TASK";
+
+    public final static String GTASK_JSON_USER = "user";
+
+    public final static String MIUI_FOLDER_PREFFIX = "[MIUI_Notes]";
+
+    public final static String FOLDER_DEFAULT = "Default";
+
+    public final static String FOLDER_CALL_NOTE = "Call_Note";
+
+    public final static String FOLDER_META = "METADATA";
+
+    public final static String META_HEAD_GTASK_ID = "meta_gid";
+
+    public final static String META_HEAD_NOTE = "meta_note";
+
+    public final static String META_HEAD_DATA = "meta_data";
+
+    public final static String META_NOTE_NAME = "[META INFO] DON'T UPDATE AND DELETE";
+
+}

other/06_210340049葛朋林_代码标注/GTaskSyncService.java

@@ -0,0 +1,124 @@
+package net.micode.notes.gtask.remote;
+
+/*
+ * Service是在一段不定的时间运行在后台，不和用户交互的应用组件
+ * 主要方法：
+ * private void startSync()  启动一个同步工作
+ * private void cancelSync() 取消同步
+ * public void onCreate()
+ * public int onStartCommand(Intent intent, int flags, int startId)  service生命周期的组成部分，相当于重启service（比如在被暂停之后），而不是创建一个新的service
+ * public void onLowMemory()  在没有内存的情况下如果存在service则结束掉这的service
+ * public IBinder onBind()
+ * public void sendBroadcast(String msg)   发送同步的相关通知
+ * public static void startSync(Activity activity)
+ * public static void cancelSync(Context context)
+ * public static boolean isSyncing()  判读是否在进行同步
+ * public static String getProgressString()  获取当前进度的信息
+ */
+
+public class GTaskSyncService extends Service {
+    public final static String ACTION_STRING_NAME = "sync_action_type";
+
+    public final static int ACTION_START_SYNC = 0;
+
+    public final static int ACTION_CANCEL_SYNC = 1;
+
+    public final static int ACTION_INVALID = 2;
+
+    public final static String GTASK_SERVICE_BROADCAST_NAME = "net.micode.notes.gtask.remote.gtask_sync_service";
+
+    public final static String GTASK_SERVICE_BROADCAST_IS_SYNCING = "isSyncing";
+
+    public final static String GTASK_SERVICE_BROADCAST_PROGRESS_MSG = "progressMsg";
+
+    private static GTaskASyncTask mSyncTask = null;
+
+    private static String mSyncProgress = "";
+
+    //开始一个同步的工作
+    private void startSync() {
+        if (mSyncTask == null) {
+            mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() {
+                public void onComplete() {
+                    mSyncTask = null;
+                    sendBroadcast("");
+                    stopSelf();
+                }
+            });
+            sendBroadcast("");
+            mSyncTask.execute(); //这个函数让任务是以单线程队列方式或线程池队列方式运行
+        }
+    }
+
+
+    private void cancelSync() {
+        if (mSyncTask != null) {
+            mSyncTask.cancelSync();
+        }
+    }
+
+    @Override
+    public void onCreate() {  //初始化一个service
+        mSyncTask = null;
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        Bundle bundle = intent.getExtras();
+        if (bundle != null && bundle.containsKey(ACTION_STRING_NAME)) {
+            switch (bundle.getInt(ACTION_STRING_NAME, ACTION_INVALID)) {
+                //两种情况，开始同步或者取消同步
+                case ACTION_START_SYNC:
+                    startSync();
+                    break;
+                case ACTION_CANCEL_SYNC:
+                    cancelSync();
+                    break;
+                default:
+                    break;
+            }
+            return START_STICKY; //等待新的intent来是这个service继续运行
+        }
+        return super.onStartCommand(intent, flags, startId);
+    }
+
+    @Override
+    public void onLowMemory() {
+        if (mSyncTask != null) {
+            mSyncTask.cancelSync();
+        }
+    }
+
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    public void sendBroadcast(String msg) {
+        mSyncProgress = msg;
+        Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME);  //创建一个新的Intent
+        intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null); //附加INTENT中的相应参数的值
+        intent.putExtra(GTASK_SERVICE_BROADCAST_PROGRESS_MSG, msg);
+        sendBroadcast(intent);   //发送这个通知
+    }
+
+    public static void startSync(Activity activity) {//执行一个service，service的内容里的同步动作就是开始同步
+        GTaskManager.getInstance().setActivityContext(activity);
+        Intent intent = new Intent(activity, GTaskSyncService.class);
+        intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC);
+        activity.startService(intent);
+    }
+
+    public static void cancelSync(Context context) {//执行一个service，service的内容里的同步动作就是取消同步
+        Intent intent = new Intent(context, GTaskSyncService.class);
+        intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC);
+        context.startService(intent);
+    }
+
+    public static boolean isSyncing() {
+        return mSyncTask != null;
+    }
+
+    public static String getProgressString() {
+        return mSyncProgress;
+    }
+}

other/06_210340052黄滕旭_代码标注/Contact.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.provider.ContactsContract.CommonDataKinds.Phone;
+import android.provider.ContactsContract.Data;
+import android.telephony.PhoneNumberUtils;
+import android.util.Log;
+
+import java.util.HashMap;
+
+public class Contact {//联系人
+    private static HashMap<String, String> sContactCache;
+    private static final String TAG = "Contact";
+    //定义字符串"CALLER_ID_SELECTION"
+    private static final String CALLER_ID_SELECTION =  "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+    + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+    + " AND " + Data.RAW_CONTACT_ID + " IN "
+            + "(SELECT raw_contact_id "
+            + " FROM phone_lookup"
+            + " WHERE min_match = '+')";
+//获取联系人
+    public static String getContact(Context context, String phoneNumber) {
+        if(sContactCache == null) {
+            sContactCache = new HashMap<String, String>();
+        }//如果为空则创建新的sContactCache
+
+        if(sContactCache.containsKey(phoneNumber)) {
+            return sContactCache.get(phoneNumber);
+        }//查询hash表中已有的phoneNumber信息
+
+        String selection = CALLER_ID_SELECTION.replace("+",
+                PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+        // 查找数据库中phoneNumber的信息
+        Cursor cursor = context.getContentResolver().query(
+                Data.CONTENT_URI,
+                new String [] { Phone.DISPLAY_NAME },
+                selection,
+                new String[] { phoneNumber },
+                null);
+        //判断查找的结果
+        if (cursor != null && cursor.moveToFirst()) {
+            try {
+                String name = cursor.getString(0);
+                sContactCache.put(phoneNumber, name);
+                return name;//找到相关信息返回name
+            } catch (IndexOutOfBoundsException e) {
+                Log.e(TAG, " Cursor get string error " + e.toString());
+                return null;//异常
+            } finally {
+                cursor.close();//没找到相关信息
+            }
+        } else {//未找到相关信息
+            Log.d(TAG, "No contact matched with number:" + phoneNumber);
+            return null;
+        }
+    }
+}

other/06_210340052黄滕旭_代码标注/MetaData.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+
+public class MetaData extends Task {
+    private final static String TAG = MetaData.class.getSimpleName();
+
+    private String mRelatedGid = null;
+
+    public void setMeta(String gid, JSONObject metaInfo) {
+        try {
+            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);//将这对键值放入metaInfo这个jsonobject对象中
+        } catch (JSONException e) {
+            Log.e(TAG, "failed to put related gid");//输出错误
+        }
+        setNotes(metaInfo.toString());
+        setName(GTaskStringUtils.META_NOTE_NAME);
+    }
+
+    public String getRelatedGid() {
+        return mRelatedGid;
+    }
+    //获取相关联的Gid
+    @Override
+    public boolean isWorthSaving() {
+        return getNotes() != null;
+    }
+    //判断当前数据是否为空，若为空则返回真即值得保存
+    @Override//使用远程json数据对象设置元数据内容
+    public void setContentByRemoteJSON(JSONObject js) {
+        super.setContentByRemoteJSON(js);
+        if (getNotes() != null) {
+            try {
+                JSONObject metaInfo = new JSONObject(getNotes().trim());
+                mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
+            } catch (JSONException e) {
+                Log.w(TAG, "failed to get related gid");
+                mRelatedGid = null;
+            }
+        }
+    }
+
+    @Override//使用本地json数据对象设置元数据内容，一般不会用到，若用到，则抛出异常
+    public void setContentByLocalJSON(JSONObject js) {
+        // this function should not be called
+        throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
+    }
+
+    @Override//从元数据内容中获取本地json对象,用到便抛出异常
+    public JSONObject getLocalJSONFromContent() {
+        throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
+    }
+
+    @Override//获取同步动作状态，若用到，则抛出异常
+    public int getSyncAction(Cursor c) {
+        throw new IllegalAccessError("MetaData:getSyncAction should not be called");
+    }
+
+}

other/06_210340052黄滕旭_代码标注/Node.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+
+import org.json.JSONObject;
+
+public abstract class Node {
+    //定义了各种用于表征同步状态的常量
+    public static final int SYNC_ACTION_NONE = 0;// 本地和云端都无可更新内容
+
+    public static final int SYNC_ACTION_ADD_REMOTE = 1;// 需要在远程云端增加内容
+
+    public static final int SYNC_ACTION_ADD_LOCAL = 2;// 需要在本地增加内容
+
+    public static final int SYNC_ACTION_DEL_REMOTE = 3;// 需要在远程云端删除内容
+
+    public static final int SYNC_ACTION_DEL_LOCAL = 4;// 需要在本地删除内容
+
+    public static final int SYNC_ACTION_UPDATE_REMOTE = 5;//远程更新内容
+
+    public static final int SYNC_ACTION_UPDATE_LOCAL = 6;//本地更新内容
+
+    public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;//同步出现冲突
+
+    public static final int SYNC_ACTION_ERROR = 8;//同步错误
+
+    private String mGid;
+
+    private String mName;
+
+    private long mLastModified;//记录最后一次修改时间
+
+
+    private boolean mDeleted;//表征是否被删除
+
+    public Node() {
+        mGid = null;
+        mName = "";
+        mLastModified = 0;
+        mDeleted = false;
+    }
+
+    public abstract JSONObject getCreateAction(int actionId);
+
+    public abstract JSONObject getUpdateAction(int actionId);
+
+    public abstract void setContentByRemoteJSON(JSONObject js);
+
+    public abstract void setContentByLocalJSON(JSONObject js);
+
+    public abstract JSONObject getLocalJSONFromContent();
+
+    public abstract int getSyncAction(Cursor c);
+
+    public void setGid(String gid) {
+        this.mGid = gid;
+    }
+
+    public void setName(String name) {
+        this.mName = name;
+    }
+
+    public void setLastModified(long lastModified) {
+        this.mLastModified = lastModified;
+    }
+
+    public void setDeleted(boolean deleted) {
+        this.mDeleted = deleted;
+    }
+
+    public String getGid() {
+        return this.mGid;
+    }
+
+    public String getName() {
+        return this.mName;
+    }
+
+    public long getLastModified() {
+        return this.mLastModified;
+    }
+
+    public boolean getDeleted() {
+        return this.mDeleted;
+    }
+
+}

other/06_210340052黄滕旭_代码标注/Notes.java

@@ -0,0 +1,281 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.net.Uri;
+//
+// Notes 类中定义了很多常量，这些常量大多是int型和string型
+public class Notes {
+    public static final String AUTHORITY = "micode_notes";
+    public static final String TAG = "Notes";
+    public static final int TYPE_NOTE     = 0;
+    public static final int TYPE_FOLDER   = 1;
+    public static final int TYPE_SYSTEM   = 2;
+
+    /**
+     * Following IDs are system folders' identifiers
+     * {@link Notes#ID_ROOT_FOLDER } is default folder
+     * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
+     * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
+     */
+    public static final int ID_ROOT_FOLDER = 0;//文件夹ID
+    public static final int ID_TEMPARAY_FOLDER = -1;//暂时文件夹ID
+    public static final int ID_CALL_RECORD_FOLDER = -2;//电话记录文件夹
+    public static final int ID_TRASH_FOLER = -3;//垃圾文件夹
+
+    public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
+    public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
+    public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
+    public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
+    public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
+    public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
+
+    public static final int TYPE_WIDGET_INVALIDE      = -1;
+    public static final int TYPE_WIDGET_2X            = 0;
+    public static final int TYPE_WIDGET_4X            = 1;
+
+    public static class DataConstants {
+        public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
+        public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
+    }
+
+    /**
+     * Uri to query all notes and folders
+     */
+    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+
+    /**
+     * Uri to query data
+     */
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+
+    public interface NoteColumns {
+        /**
+         * The unique ID for a row
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String ID = "_id";
+
+        /**
+         * The parent's id for note or folder
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String PARENT_ID = "parent_id";
+
+        /**
+         * Created data for note or folder
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String CREATED_DATE = "created_date";
+
+        /**
+         * Latest modified date
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String MODIFIED_DATE = "modified_date";
+
+
+        /**
+         * Alert date
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String ALERTED_DATE = "alert_date";
+
+        /**
+         * Folder's name or text content of note
+         * <P> Type: TEXT </P>
+         */
+        public static final String SNIPPET = "snippet";
+
+        /**
+         * Note's widget id
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String WIDGET_ID = "widget_id";
+
+        /**
+         * Note's widget type
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String WIDGET_TYPE = "widget_type";
+
+        /**
+         * Note's background color's id
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String BG_COLOR_ID = "bg_color_id";
+
+        /**
+         * For text note, it doesn't has attachment, for multi-media
+         * note, it has at least one attachment
+         * <P> Type: INTEGER </P>
+         */
+        public static final String HAS_ATTACHMENT = "has_attachment";
+
+        /**
+         * Folder's count of notes
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String NOTES_COUNT = "notes_count";
+
+        /**
+         * The file type: folder or note
+         * <P> Type: INTEGER </P>
+         */
+        public static final String TYPE = "type";
+
+        /**
+         * The last sync id
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String SYNC_ID = "sync_id";
+
+        /**
+         * Sign to indicate local modified or not
+         * <P> Type: INTEGER </P>
+         */
+        public static final String LOCAL_MODIFIED = "local_modified";
+
+        /**
+         * Original parent id before moving into temporary folder
+         * <P> Type : INTEGER </P>
+         */
+        public static final String ORIGIN_PARENT_ID = "origin_parent_id";
+
+        /**
+         * The gtask id
+         * <P> Type : TEXT </P>
+         */
+        public static final String GTASK_ID = "gtask_id";
+
+        /**
+         * The version code
+         * <P> Type : INTEGER (long) </P>
+         */
+        public static final String VERSION = "version";
+    }
+//数据栏目
+    public interface DataColumns {
+        /**
+         * The unique ID for a row
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String ID = "_id";
+
+        /**
+         * The MIME type of the item represented by this row.
+         * <P> Type: Text </P>
+         */
+        public static final String MIME_TYPE = "mime_type";
+
+        /**
+         * The reference id to note that this data belongs to
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String NOTE_ID = "note_id";
+
+        /**
+         * Created data for note or folder
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String CREATED_DATE = "created_date";
+
+        /**
+         * Latest modified date
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String MODIFIED_DATE = "modified_date";
+
+        /**
+         * Data's content
+         * <P> Type: TEXT </P>
+         */
+        public static final String CONTENT = "content";
+
+
+        /**
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * integer data type
+         * <P> Type: INTEGER </P>
+         */
+        public static final String DATA1 = "data1";
+
+        /**
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * integer data type
+         * <P> Type: INTEGER </P>
+         */
+        public static final String DATA2 = "data2";
+
+        /**
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * TEXT data type
+         * <P> Type: TEXT </P>
+         */
+        public static final String DATA3 = "data3";
+
+        /**
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * TEXT data type
+         * <P> Type: TEXT </P>
+         */
+        public static final String DATA4 = "data4";
+
+        /**
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * TEXT data type
+         * <P> Type: TEXT </P>
+         */
+        public static final String DATA5 = "data5";
+    }
+//测试内容的数据
+    public static final class TextNote implements DataColumns {
+        /**
+         * Mode to indicate the text in check list mode or not
+         * <P> Type: Integer 1:check list mode 0: normal mode </P>
+         */
+        public static final String MODE = DATA1;
+
+        public static final int MODE_CHECK_LIST = 1;
+
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
+
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
+    }
+
+    public static final class CallNote implements DataColumns {
+        /**
+         * Call date for this record
+         * <P> Type: INTEGER (long) </P>
+         */
+        public static final String CALL_DATE = DATA1;
+
+        /**
+         * Phone number for this record
+         * <P> Type: TEXT </P>
+         */
+        public static final String PHONE_NUMBER = DATA3;
+
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
+
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
+
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
+    }
+}

other/06_210340052黄滕旭_代码标注/NotesDatabaseHelper.java

@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+
+
+//数据库操作，用SQLOpenhelper,对一些note和文件进行数据库的操作
+public class NotesDatabaseHelper extends SQLiteOpenHelper {
+    private static final String DB_NAME = "note.db";
+
+    private static final int DB_VERSION = 4;
+
+    public interface TABLE {//接口，分成note和data，在后面的程序里分别使用过
+        public static final String NOTE = "note";
+
+        public static final String DATA = "data";
+    }
+
+    private static final String TAG = "NotesDatabaseHelper";
+
+    private static NotesDatabaseHelper mInstance;
+
+    private static final String CREATE_NOTE_TABLE_SQL =
+        "CREATE TABLE " + TABLE.NOTE + "(" +
+            NoteColumns.ID + " INTEGER PRIMARY KEY," +
+            NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
+            NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
+            NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
+            NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
+        ")";
+    //数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容
+
+    private static final String CREATE_DATA_TABLE_SQL =
+        "CREATE TABLE " + TABLE.DATA + "(" +
+            DataColumns.ID + " INTEGER PRIMARY KEY," +
+            DataColumns.MIME_TYPE + " TEXT NOT NULL," +
+            DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
+            DataColumns.DATA1 + " INTEGER," +
+            DataColumns.DATA2 + " INTEGER," +
+            DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
+            DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
+            DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
+        ")";//和上面的功能一样，主要是存储的项目不同
+
+    private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
+        "CREATE INDEX IF NOT EXISTS note_id_index ON " +
+        TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格
+
+    /**
+     * Increase folder's note count when move note to the folder
+     */
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+        "CREATE TRIGGER increase_folder_count_on_update "+
+        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+        " END";//在文件夹中移出一个Note之后需要更改的数据的表格。
+
+    /**
+     * Decrease folder's note count when move note from folder
+     */
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+        "CREATE TRIGGER decrease_folder_count_on_update " +
+        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+        "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
+        " END";//在文件夹中插入一个Note之后需要更改的数据的表格
+
+    /**
+     * Increase folder's note count when insert new note to the folder
+     */
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
+        "CREATE TRIGGER increase_folder_count_on_insert " +
+        " AFTER INSERT ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+        " END";//在文件夹中删除一个Note之后需要更改的数据的表格。
+
+    /**
+     * Decrease folder's note count when delete note from the folder
+     */
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER decrease_folder_count_on_delete " +
+        " AFTER DELETE ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+        "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
+        " END";//在文件夹中对一个Note导入新的数据之后需要更改的数据的表格。
+
+    /**
+     * Update note's content when insert data with type {@link DataConstants#NOTE}
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
+        "CREATE TRIGGER update_note_content_on_insert " +
+        " AFTER INSERT ON " + TABLE.DATA +
+        " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+        " END";//Note数据被修改后需要更改的数据的表格
+
+    /**
+     * Update note's content when data with {@link DataConstants#NOTE} type has changed
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
+        "CREATE TRIGGER update_note_content_on_update " +
+        " AFTER UPDATE ON " + TABLE.DATA +
+        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+        " END";//Note数据被修改后需要更改的数据的表格
+
+    /**
+     * Update note's content when data with {@link DataConstants#NOTE} type has deleted
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER update_note_content_on_delete " +
+        " AFTER delete ON " + TABLE.DATA +
+        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.SNIPPET + "=''" +
+        "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
+        " END";//Note数据被修改后需要更改的数据的表格
+
+    /**
+     * Delete datas belong to note which has been deleted
+     */
+    private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER delete_data_on_delete " +
+        " AFTER DELETE ON " + TABLE.NOTE +
+        " BEGIN" +
+        "  DELETE FROM " + TABLE.DATA +
+        "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
+        " END";//删除已删除便签后需要更改的数据的表格。
+
+
+    /**
+     * Delete notes belong to folder which has been deleted
+     */
+    private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER folder_delete_notes_on_delete " +
+        " AFTER DELETE ON " + TABLE.NOTE +
+        " BEGIN" +
+        "  DELETE FROM " + TABLE.NOTE +
+        "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+        " END";//删除已删除的文件夹的便签后需要更改的数据的表格。
+
+
+
+    /**
+     * Move notes belong to folder which has been moved to trash folder
+     */
+    private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
+        "CREATE TRIGGER folder_move_notes_on_trash " +
+        " AFTER UPDATE ON " + TABLE.NOTE +
+        " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+        "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+        " END";////还原垃圾桶中便签后需要更改的数据的表格。
+
+    public NotesDatabaseHelper(Context context) {
+        super(context, DB_NAME, null, DB_VERSION);
+    }
+
+    public void createNoteTable(SQLiteDatabase db) {
+        db.execSQL(CREATE_NOTE_TABLE_SQL);
+        reCreateNoteTableTriggers(db);
+        createSystemFolder(db);
+        Log.d(TAG, "note table has been created");
+    }//创建note数据表格
+
+    private void reCreateNoteTableTriggers(SQLiteDatabase db) {
+        db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
+
+        db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
+        db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
+        db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
+        db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
+        db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
+        db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
+        db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
+    }
+//先删除原来有的数据库的触发器再重新创建新的数据库，重新创建上述定义的表格用的。
+    private void createSystemFolder(SQLiteDatabase db) {
+        ContentValues values = new ContentValues();
+
+        /**
+         * call record foler for call notes
+         */
+        values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * root folder which is default folder
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * temporary folder which is used for moving note
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * create trash folder
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+    }//创建几个系统文件夹
+
+    public void createDataTable(SQLiteDatabase db) {
+        db.execSQL(CREATE_DATA_TABLE_SQL);
+        reCreateDataTableTriggers(db);
+        db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
+        Log.d(TAG, "data table has been created");
+    }//创建表格来存储便签内容
+
+    private void reCreateDataTableTriggers(SQLiteDatabase db) {
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
+
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
+    }//execSQL是数据库操作的API，主要是更改行为的SQL语句。
+
+    static synchronized NotesDatabaseHelper getInstance(Context context) {
+        if (mInstance == null) {
+            mInstance = new NotesDatabaseHelper(context);
+        }
+        return mInstance;
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        createNoteTable(db);
+        createDataTable(db);
+    }//实现两个表格（上面创建的两个表格）
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        boolean reCreateTriggers = false;
+        boolean skipV2 = false;
+
+        if (oldVersion == 1) {
+            upgradeToV2(db);
+            skipV2 = true; // this upgrade including the upgrade from v2 to v3
+            oldVersion++;
+        }
+
+        if (oldVersion == 2 && !skipV2) {
+            upgradeToV3(db);
+            reCreateTriggers = true;
+            oldVersion++;
+        }
+
+        if (oldVersion == 3) {
+            upgradeToV4(db);
+            oldVersion++;
+        }
+
+        if (reCreateTriggers) {
+            reCreateNoteTableTriggers(db);
+            reCreateDataTableTriggers(db);
+        }
+
+        if (oldVersion != newVersion) {
+            throw new IllegalStateException("Upgrade notes database to version " + newVersion
+                    + "fails");
+        }
+    }//数据库版本的更新
+
+    private void upgradeToV2(SQLiteDatabase db) {
+        db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
+        db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
+        createNoteTable(db);
+        createDataTable(db);
+    }//更新到V2版本
+
+    private void upgradeToV3(SQLiteDatabase db) {
+        // drop unused triggers
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
+        // add a column for gtask id
+        db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+                + " TEXT NOT NULL DEFAULT ''");
+        // add a trash system folder
+        ContentValues values = new ContentValues();
+        values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+    }//更新到V3版本
+
+    private void upgradeToV4(SQLiteDatabase db) {
+        db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+                + " INTEGER NOT NULL DEFAULT 0");
+    }
+}//更新到V4版本

other/06_210340052黄滕旭_代码标注/NotesProvider.java

@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+
+import android.app.SearchManager;
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Intent;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.NotesDatabaseHelper.TABLE;
+
+//为存储和获取数据提供接口。可以在不同的应用程序之间共享数据
+public class NotesProvider extends ContentProvider {
+    // UriMatcher用于匹配Uri
+    private static final UriMatcher mMatcher;
+
+    private NotesDatabaseHelper mHelper;
+
+    private static final String TAG = "NotesProvider";
+
+    private static final int URI_NOTE            = 1;
+    private static final int URI_NOTE_ITEM       = 2;
+    private static final int URI_DATA            = 3;
+    private static final int URI_DATA_ITEM       = 4;
+
+    private static final int URI_SEARCH          = 5;
+    private static final int URI_SEARCH_SUGGEST  = 6;
+
+    static {
+        mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        // 把需要匹配Uri路径全部给注册上
+        mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
+        mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
+        mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
+        mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM);
+        mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH);
+        mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
+        mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
+    }
+
+    /**
+     * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
+     * we will trim '\n' and white space in order to show more information.
+     */
+    // 声明 NOTES_SEARCH_PROJECTION
+    private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+        + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+        + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+        + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+        + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
+    // 声明NOTES_SNIPPET_SEARCH_QUERY
+    private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
+        + " FROM " + TABLE.NOTE
+        + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+        + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+        + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
+
+    @Override
+    // Context只有在onCreate()中才被初始化
+    // 对mHelper进行实例化
+    public boolean onCreate() {
+        mHelper = NotesDatabaseHelper.getInstance(getContext());
+        return true;
+    }
+
+    @Override
+    // 查询uri在数据库中对应的位置
+
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        Cursor c = null;        // 获取可读数据库
+        SQLiteDatabase db = mHelper.getReadableDatabase();
+        String id = null;
+        // 匹配查找uri
+        //不同的匹配值，在数据库中查找相应的条目
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
+                        sortOrder);
+                break;
+            case URI_NOTE_ITEM:
+                id = uri.getPathSegments().get(1);
+                c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs, null, null, sortOrder);
+                break;
+            case URI_DATA:
+                c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
+                        sortOrder);
+                break;
+            case URI_DATA_ITEM:
+                id = uri.getPathSegments().get(1);
+                c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs, null, null, sortOrder);
+                break;
+            case URI_SEARCH:
+            case URI_SEARCH_SUGGEST:
+                if (sortOrder != null || projection != null) {
+                    throw new IllegalArgumentException(
+                            "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
+                }//异常
+
+                String searchString = null;
+                if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
+                    if (uri.getPathSegments().size() > 1) {
+                        searchString = uri.getPathSegments().get(1);
+                    }
+                } else {
+                    searchString = uri.getQueryParameter("pattern");
+                }
+
+                if (TextUtils.isEmpty(searchString)) {
+                    return null;
+                }
+
+                try {
+                    searchString = String.format("%%%s%%", searchString);
+                    c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
+                            new String[] { searchString });//异常
+                } catch (IllegalStateException ex) {
+                    Log.e(TAG, "got exception: " + ex.toString());
+                }
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);// 抛出异常
+        }
+        if (c != null) {
+            c.setNotificationUri(getContext().getContentResolver(), uri);
+        }
+        return c;
+    }
+
+    @Override//插入一个Uri
+    public Uri insert(Uri uri, ContentValues values) {
+        //获取可写数据库
+        SQLiteDatabase db = mHelper.getWritableDatabase();
+        long dataId = 0, noteId = 0, insertedId = 0;
+        switch (mMatcher.match(uri)) {
+            //新增一个条目
+            case URI_NOTE:
+                insertedId = noteId = db.insert(TABLE.NOTE, null, values);
+                break;
+            // 如果存在，查找NOTE_ID
+            case URI_DATA:
+                if (values.containsKey(DataColumns.NOTE_ID)) {
+                    noteId = values.getAsLong(DataColumns.NOTE_ID);
+                } else {
+                    Log.d(TAG, "Wrong data format without note id:" + values.toString());
+                }
+                insertedId = dataId = db.insert(TABLE.DATA, null, values);
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        // Notify the note uri
+        if (noteId > 0) {
+            getContext().getContentResolver().notifyChange(
+                    ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
+        }
+
+        // Notify the data uri
+        if (dataId > 0) {
+            getContext().getContentResolver().notifyChange(
+                    ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
+        }
+    // 返回插入的uri的路径
+        return ContentUris.withAppendedId(uri, insertedId);
+    }
+
+    @Override// 删除一个uri
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        int count = 0;
+        String id = null;
+        SQLiteDatabase db = mHelper.getWritableDatabase();        // 获得可写的数据库
+        boolean deleteData = false;
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
+                count = db.delete(TABLE.NOTE, selection, selectionArgs);
+                break;
+            case URI_NOTE_ITEM:
+                id = uri.getPathSegments().get(1);
+                /**
+                 * ID that smaller than 0 is system folder which is not allowed to
+                 * trash
+                 */
+                long noteId = Long.valueOf(id);
+                if (noteId <= 0) {
+                    break;
+                }
+                count = db.delete(TABLE.NOTE,
+                        NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
+                break;
+            case URI_DATA:
+                count = db.delete(TABLE.DATA, selection, selectionArgs);
+                deleteData = true;
+                break;
+            case URI_DATA_ITEM:
+                id = uri.getPathSegments().get(1);
+                count = db.delete(TABLE.DATA,
+                        DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
+                deleteData = true;
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        if (count > 0) {
+            if (deleteData) {
+                getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
+            }
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+        return count;
+    }
+
+    @Override    // 更新一个uri
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        int count = 0;
+        String id = null;
+        SQLiteDatabase db = mHelper.getWritableDatabase();
+        boolean updateData = false;
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                increaseNoteVersion(-1, selection, selectionArgs);
+                count = db.update(TABLE.NOTE, values, selection, selectionArgs);
+                break;
+            case URI_NOTE_ITEM:
+                id = uri.getPathSegments().get(1);
+                increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
+                count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs);
+                break;
+            case URI_DATA:
+                count = db.update(TABLE.DATA, values, selection, selectionArgs);
+                updateData = true;
+                break;
+            case URI_DATA_ITEM:
+                id = uri.getPathSegments().get(1);
+                count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs);
+                updateData = true;
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        if (count > 0) {
+            if (updateData) {
+                getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
+            }
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+        return count;
+    }
+    // 将字符串解析成规定格式
+    private String parseSelection(String selection) {
+        return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
+    }
+
+    //增加NoteVersion
+    private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
+        StringBuilder sql = new StringBuilder(120);
+        sql.append("UPDATE ");
+        sql.append(TABLE.NOTE);
+        sql.append(" SET ");
+        sql.append(NoteColumns.VERSION);
+        sql.append("=" + NoteColumns.VERSION + "+1 ");
+
+        if (id > 0 || !TextUtils.isEmpty(selection)) {
+            sql.append(" WHERE ");
+        }
+        if (id > 0) {
+            sql.append(NoteColumns.ID + "=" + String.valueOf(id));
+        }
+        if (!TextUtils.isEmpty(selection)) {
+            String selectString = id > 0 ? parseSelection(selection) : selection;
+            for (String args : selectionArgs) {
+                selectString = selectString.replaceFirst("\\?", args);
+            }
+            sql.append(selectString);
+        }
+    // execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句
+        mHelper.getWritableDatabase().execSQL(sql.toString());
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+}

other/06_210340052黄滕旭_代码标注/SqlData.java

@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.NotesDatabaseHelper.TABLE;
+import net.micode.notes.gtask.exception.ActionFailureException;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+
+public class SqlData {//得到类的简写名称存入字符串TAG中
+    private static final String TAG = SqlData.class.getSimpleName();
+
+    private static final int INVALID_ID = -99999;//为mDataId初始值设为-99999
+    // 集合了interface DataColumns中所有SF常量
+    public static final String[] PROJECTION_DATA = new String[] {
+            DataColumns.ID, DataColumns.MIME_TYPE, DataColumns.CONTENT, DataColumns.DATA1,
+            DataColumns.DATA3
+    };
+    //以下五个变量作为sql表中5列的编号
+    public static final int DATA_ID_COLUMN = 0;
+
+    public static final int DATA_MIME_TYPE_COLUMN = 1;
+
+    public static final int DATA_CONTENT_COLUMN = 2;
+
+    public static final int DATA_CONTENT_DATA_1_COLUMN = 3;
+
+    public static final int DATA_CONTENT_DATA_3_COLUMN = 4;
+
+    private ContentResolver mContentResolver;
+    //判断是否直接用Content生成，是为true，否则为false
+    private boolean mIsCreate;
+
+    private long mDataId;
+
+    private String mDataMimeType;
+
+    private String mDataContent;
+
+    private long mDataContentData1;
+
+    private String mDataContentData3;
+
+    private ContentValues mDiffDataValues;
+    /*
+	 * 功能描述：构造函数，用于初始化数据
+     * 参数注解：mContentResolver用于获取ContentProvider提供的数据
+     * 参数注解： mIsCreate表征当前数据是用哪种方式创建（两种构造函数的参数不同）
+*/
+
+    public SqlData(Context context) {
+        mContentResolver = context.getContentResolver();
+        mIsCreate = true;
+        mDataId = INVALID_ID;
+        mDataMimeType = DataConstants.NOTE;
+        mDataContent = "";
+        mDataContentData1 = 0;
+        mDataContentData3 = "";
+        mDiffDataValues = new ContentValues();
+    }
+/*
+	 * 功能描述：构造函数，初始化数据
+     * 参数注解：mContentResolver用于获取ContentProvider提供的数据
+     * 参数注解： mIsCreate表征当前数据是用哪种方式创建（两种构造函数的参数不同）*/
+    public SqlData(Context context, Cursor c) {
+        mContentResolver = context.getContentResolver();
+        mIsCreate = false;
+        loadFromCursor(c);
+        mDiffDataValues = new ContentValues();
+    }
+//从光标处加载数据
+    private void loadFromCursor(Cursor c) {
+        mDataId = c.getLong(DATA_ID_COLUMN);
+        mDataMimeType = c.getString(DATA_MIME_TYPE_COLUMN);
+        mDataContent = c.getString(DATA_CONTENT_COLUMN);
+        mDataContentData1 = c.getLong(DATA_CONTENT_DATA_1_COLUMN);
+        mDataContentData3 = c.getString(DATA_CONTENT_DATA_3_COLUMN);
+    }
+    //设置用于共享的数据，并提供异常抛出与处理机制
+    public void setContent(JSONObject js) throws JSONException {
+        long dataId = js.has(DataColumns.ID) ? js.getLong(DataColumns.ID) : INVALID_ID;
+        //如果传入的JSONObject对象中有DataColumns.ID这一项，则设置，否则设为INVALID_ID
+        if (mIsCreate || mDataId != dataId) {
+            mDiffDataValues.put(DataColumns.ID, dataId);
+        }
+        mDataId = dataId;
+
+        String dataMimeType = js.has(DataColumns.MIME_TYPE) ? js.getString(DataColumns.MIME_TYPE)
+                : DataConstants.NOTE;
+        if (mIsCreate || !mDataMimeType.equals(dataMimeType)) {
+            mDiffDataValues.put(DataColumns.MIME_TYPE, dataMimeType);
+        }
+        mDataMimeType = dataMimeType;
+
+        String dataContent = js.has(DataColumns.CONTENT) ? js.getString(DataColumns.CONTENT) : "";
+        if (mIsCreate || !mDataContent.equals(dataContent)) {
+            mDiffDataValues.put(DataColumns.CONTENT, dataContent);
+        }
+        mDataContent = dataContent;
+
+        long dataContentData1 = js.has(DataColumns.DATA1) ? js.getLong(DataColumns.DATA1) : 0;
+        if (mIsCreate || mDataContentData1 != dataContentData1) {
+            mDiffDataValues.put(DataColumns.DATA1, dataContentData1);
+        }
+        mDataContentData1 = dataContentData1;
+
+        String dataContentData3 = js.has(DataColumns.DATA3) ? js.getString(DataColumns.DATA3) : "";
+        if (mIsCreate || !mDataContentData3.equals(dataContentData3)) {
+            mDiffDataValues.put(DataColumns.DATA3, dataContentData3);
+        }
+        mDataContentData3 = dataContentData3;
+    }
+    //获取共享的数据内容，并提供异常抛出与处理机制
+    public JSONObject getContent() throws JSONException {
+        if (mIsCreate) {
+            Log.e(TAG, "it seems that we haven't created this in database yet");
+            return null;
+        }
+        //创建JSONObject对象。并将相关数据放入其中，并返回。
+        JSONObject js = new JSONObject();
+        js.put(DataColumns.ID, mDataId);
+        js.put(DataColumns.MIME_TYPE, mDataMimeType);
+        js.put(DataColumns.CONTENT, mDataContent);
+        js.put(DataColumns.DATA1, mDataContentData1);
+        js.put(DataColumns.DATA3, mDataContentData3);
+        return js;
+    }
+    //commit函数用于把当前造作所做的修改保存到数据库
+    public void commit(long noteId, boolean validateVersion, long version) {
+
+        if (mIsCreate) {
+            if (mDataId == INVALID_ID && mDiffDataValues.containsKey(DataColumns.ID)) {
+                mDiffDataValues.remove(DataColumns.ID);
+            }
+
+            mDiffDataValues.put(DataColumns.NOTE_ID, noteId);
+            //创建便签
+            Uri uri = mContentResolver.insert(Notes.CONTENT_DATA_URI, mDiffDataValues);
+            try {
+                mDataId = Long.valueOf(uri.getPathSegments().get(1));
+            } catch (NumberFormatException e) {
+                Log.e(TAG, "Get note id error :" + e.toString());
+                throw new ActionFailureException("create note failed");
+            }//异常
+        } else {
+            if (mDiffDataValues.size() > 0) {
+                int result = 0;
+                if (!validateVersion) {
+                    result = mContentResolver.update(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues, null, null);
+                } else {
+                    result = mContentResolver.update(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues,
+                            " ? in (SELECT " + NoteColumns.ID + " FROM " + TABLE.NOTE
+                                    + " WHERE " + NoteColumns.VERSION + "=?)", new String[] {
+                                    String.valueOf(noteId), String.valueOf(version)
+                            });
+                }
+                if (result == 0) {
+                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                }//没有更新
+            }
+        }
+
+        mDiffDataValues.clear();
+        mIsCreate = false;
+    }
+    //获取当前ID
+    public long getId() {
+        return mDataId;
+    }
+}

other/06_210340054金佳艺_代码标注/SqlNote.java

@@ -0,0 +1,562 @@
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WAR/*
+RANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+//sqlNote代码注释
+/*  sqlNote：用于支持软件最底层的数据库的相关操作，note是data的子父集。
+    用来实现数据库中管理便签的数据，
+    方法包括提取便签内容、从数据库中获取便签数据、设置便签内容、向数据库提交便签。
+ */
+package net.micode.notes.gtask.data;
+
+import android.appwidget.AppWidgetManager;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+import net.micode.notes.tool.ResourceParser;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+
+
+public class SqlNote {
+    /*
+	 * 功能描述：得到类的简写名称存入字符串TAG中
+	 * 实现过程：调用getSimpleName ()函数
+     */
+    private static final String TAG = SqlNote.class.getSimpleName();
+    //定义一个标识便于后面数据的输入输出
+    private static final int INVALID_ID = -99999;
+
+    public static final String[] PROJECTION_NOTE = new String[] {
+            NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
+            NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
+            NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE,
+            NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.SYNC_ID,
+            NoteColumns.LOCAL_MODIFIED, NoteColumns.ORIGIN_PARENT_ID, NoteColumns.GTASK_ID,
+            NoteColumns.VERSION
+    };
+//设置17个列的编号
+    public static final int ID_COLUMN = 0;
+
+    public static final int ALERTED_DATE_COLUMN = 1;
+
+    public static final int BG_COLOR_ID_COLUMN = 2;
+
+    public static final int CREATED_DATE_COLUMN = 3;
+
+    public static final int HAS_ATTACHMENT_COLUMN = 4;
+
+    public static final int MODIFIED_DATE_COLUMN = 5;
+
+    public static final int NOTES_COUNT_COLUMN = 6;
+
+    public static final int PARENT_ID_COLUMN = 7;
+
+    public static final int SNIPPET_COLUMN = 8;
+
+    public static final int TYPE_COLUMN = 9;
+
+    public static final int WIDGET_ID_COLUMN = 10;
+
+    public static final int WIDGET_TYPE_COLUMN = 11;
+
+    public static final int SYNC_ID_COLUMN = 12;
+
+    public static final int LOCAL_MODIFIED_COLUMN = 13;
+
+    public static final int ORIGIN_PARENT_ID_COLUMN = 14;
+
+    public static final int GTASK_ID_COLUMN = 15;
+
+    public static final int VERSION_COLUMN = 16;
+//定义了17个内部变量。12个可以从content中获得，5个需要初始化为0或new
+    private Context mContext;
+
+    private ContentResolver mContentResolver;  //定义了一个私有全局变量
+
+    private boolean mIsCreate;  //后续选择生成
+
+    private long mId;
+
+    private long mAlertDate;
+
+    private int mBgColorId;
+
+    private long mCreatedDate;
+
+    private int mHasAttachment;
+
+    private long mModifiedDate;
+
+    private long mParentId;
+
+    private String mSnippet;
+
+    private int mType;
+
+    private int mWidgetId;
+
+    private int mWidgetType;
+
+    private long mOriginParent;
+
+    private long mVersion;
+
+    private ContentValues mDiffNoteValues;
+
+    private ArrayList<SqlData> mDataList;
+
+    /*
+     * 功能描述：构造函数
+     * 参数注解： mIsCreate用于标示构造方式
+     */
+    //构造函数只有context，对所有的变量进行初始化
+    public SqlNote(Context context) {  //构造函数进行初始化
+        mContext = context;
+        mContentResolver = context.getContentResolver();  //获取对象或直接查询数据
+        mIsCreate = true;  //当前数据的创建
+        mId = INVALID_ID;  //初始值定义
+        mAlertDate = 0;
+        mBgColorId = ResourceParser.getDefaultBgId(context);
+        mCreatedDate = System.currentTimeMillis();//调用系统函数获取创建时间
+        mHasAttachment = 0;
+        mModifiedDate = System.currentTimeMillis();//最后一次修改时间初始化为创建时间
+        mParentId = 0;
+        mSnippet = "";
+        mType = Notes.TYPE_NOTE;
+        mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
+        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
+        mOriginParent = 0;
+        mVersion = 0;
+        mDiffNoteValues = new ContentValues();  //创建内容
+        mDataList = new ArrayList<SqlData>();
+    }
+
+    /*
+     * 功能描述：构造函数
+     * 参数注解： mIsCreate用于标示构造方式
+     */
+    //构造函数有context和一个数据库的cursor，多数变量通过cursor指向的一条记录直接进行初始化
+
+    public SqlNote(Context context, Cursor c) {
+        mContext = context;
+        mContentResolver = context.getContentResolver();  //获取程序之间的数据共享
+        mIsCreate = false;  //记录当前数据创建方式
+        loadFromCursor(c);  //从光标处载入数据
+        mDataList = new ArrayList<SqlData>();
+        if (mType == Notes.TYPE_NOTE)
+            loadDataContent();
+        mDiffNoteValues = new ContentValues();
+    }
+
+    /*
+     * 功能描述：构造函数
+     * 参数注解： mIsCreate用于标示构造方式
+     */
+
+    public SqlNote(Context context, long id) {
+        mContext = context;
+        mContentResolver = context.getContentResolver();
+        mIsCreate = false;
+        loadFromCursor(id);
+        mDataList = new ArrayList<SqlData>();
+        if (mType == Notes.TYPE_NOTE)
+            loadDataContent();
+        mDiffNoteValues = new ContentValues();
+
+    }
+
+    /*
+     *功能描述：通过id从光标处加载数据
+     */
+    private void loadFromCursor(long id) {
+        Cursor c = null;
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
+                    new String[] {
+                        String.valueOf(id)
+                    }, null);//通过id获取对应的ContentResolver中的cursor
+            if (c != null) {
+                c.moveToNext();
+                loadFromCursor(c);
+                //加载数据进行初始化
+                //使函数SqlNote(Context context, long id)与SqlNote(Context context, long id)的实现方式基本相同
+            } else {
+                Log.w(TAG, "loadFromCursor: cursor = null");
+            }
+        } finally {
+            if (c != null)
+                c.close();
+        }
+    }
+
+    //功能描述：通过游标从光标处加载数据
+    private void loadFromCursor(Cursor c) {
+        //直接从一条记录中的获得以下变量的初始值
+        mId = c.getLong(ID_COLUMN);
+        mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
+        mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
+        mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
+        mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
+        mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
+        mParentId = c.getLong(PARENT_ID_COLUMN);
+        mSnippet = c.getString(SNIPPET_COLUMN);
+        mType = c.getInt(TYPE_COLUMN);
+        mWidgetId = c.getInt(WIDGET_ID_COLUMN);
+        mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
+        mVersion = c.getLong(VERSION_COLUMN);
+    }
+
+    //功能描述：通过content机制获取共享数据并加载到数据库当前游标处
+    private void loadDataContent() {
+        Cursor c = null;
+        mDataList.clear();
+        try {
+            c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
+                    "(note_id=?)", new String[] {
+                        String.valueOf(mId)
+                    }, null);
+            if (c != null) {
+                if (c.getCount() == 0) {
+                    Log.w(TAG, "it seems that the note has not data");
+                    return;
+                }
+                while (c.moveToNext()) {
+                    SqlData data = new SqlData(mContext, c);
+                    mDataList.add(data);
+                }
+            } else {
+                Log.w(TAG, "loadDataContent: cursor = null");
+            }
+        } finally {
+            if (c != null)
+                c.close();
+        }
+    }
+
+    //功能描述：通过设置content机制用于共享的数据信息
+    public boolean setContent(JSONObject js) {
+        try {
+            JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);  //创建一个JSONObject对象
+            if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
+                Log.w(TAG, "cannot set system folder");
+            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
+                // for folder we can only update the snnipet and type
+                //对于文件夹，只能更新snnipet并键入
+                String snippet = note.has(NoteColumns.SNIPPET) ? note
+                        .getString(NoteColumns.SNIPPET) : "";  //如果共享数据存在摘要，需要将其赋给声明的snippct变量，否则变量为空
+                if (mIsCreate || !mSnippet.equals(snippet)) {
+                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+                }  //如果SQLNote采用的是第一种构造方式，或snippet为空，则将snippet键值存入contenttvalue中
+                mSnippet = snippet;
+
+                int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+                        : Notes.TYPE_NOTE;
+                if (mIsCreate || mType != type) {
+                    mDiffNoteValues.put(NoteColumns.TYPE, type);
+                }  //判断类型是否匹配
+                mType = type;
+            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
+                JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+                long id = note.has(NoteColumns.ID) ? note.getLong(NoteColumns.ID) : INVALID_ID;
+                if (mIsCreate || mId != id) {
+                    mDiffNoteValues.put(NoteColumns.ID, id);
+                }  //判断id是否匹配
+                mId = id;
+
+                long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note
+                        .getLong(NoteColumns.ALERTED_DATE) : 0;
+                if (mIsCreate || mAlertDate != alertDate) {
+                    mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
+                }  //如果仅通过上下文对Note进行数据库修改，或该标记日与原标记日不同
+                mAlertDate = alertDate;
+
+                int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note
+                        .getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
+                if (mIsCreate || mBgColorId != bgColorId) {
+                    mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
+                }  //判断背景颜色是否一致
+                mBgColorId = bgColorId;
+
+                long createDate = note.has(NoteColumns.CREATED_DATE) ? note
+                        .getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
+                if (mIsCreate || mCreatedDate != createDate) {
+                    mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
+                }  //判断日期是否一致
+                mCreatedDate = createDate;
+
+                int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
+                        .getInt(NoteColumns.HAS_ATTACHMENT) : 0;  //修改附件
+                if (mIsCreate || mHasAttachment != hasAttachment) {
+                    mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
+                }  //判断附件是否一致
+                mHasAttachment = hasAttachment;
+
+                long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note
+                        .getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();  //修改日期
+                if (mIsCreate || mModifiedDate != modifiedDate) {
+                    mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
+                }  //判断修改的日期是否一致
+                mModifiedDate = modifiedDate;
+
+                long parentId = note.has(NoteColumns.PARENT_ID) ? note
+                        .getLong(NoteColumns.PARENT_ID) : 0;
+                if (mIsCreate || mParentId != parentId) {
+                    mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
+                }
+                mParentId = parentId;
+
+                String snippet = note.has(NoteColumns.SNIPPET) ? note
+                        .getString(NoteColumns.SNIPPET) : "";  //定义小部件
+                if (mIsCreate || !mSnippet.equals(snippet)) {
+                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+                }  //判断小部件是否一致
+                mSnippet = snippet;
+
+                int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+                        : Notes.TYPE_NOTE;
+                if (mIsCreate || mType != type) {
+                    mDiffNoteValues.put(NoteColumns.TYPE, type);
+                }  //判断类型是否一致
+                mType = type;
+
+                int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)
+                        : AppWidgetManager.INVALID_APPWIDGET_ID;
+                if (mIsCreate || mWidgetId != widgetId) {
+                    mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
+                }  //判断控件id是否一致
+                mWidgetId = widgetId;
+
+                int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note
+                        .getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
+                if (mIsCreate || mWidgetType != widgetType) {
+                    mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
+                }
+                mWidgetType = widgetType;
+
+                long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
+                        .getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
+                if (mIsCreate || mOriginParent != originParent) {
+                    mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
+                }
+                mOriginParent = originParent;
+
+                for (int i = 0; i < dataArray.length(); i++) {
+                    JSONObject data = dataArray.getJSONObject(i);
+                    SqlData sqlData = null;
+                    if (data.has(DataColumns.ID)) {
+                        long dataId = data.getLong(DataColumns.ID);
+                        for (SqlData temp : mDataList) {
+                            if (dataId == temp.getId()) {
+                                sqlData = temp;
+                            }
+                        }
+                    }
+
+                    if (sqlData == null) {
+                        sqlData = new SqlData(mContext);
+                        mDataList.add(sqlData);
+                    }
+
+                    sqlData.setContent(data);
+                }
+            }
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return false;
+        }
+        return true;
+    }
+
+    //功能描述：获取content机制提供的数据并加载到note中
+
+    public JSONObject getContent() { //获取content机制提供的数据并加载到note中
+        try {
+            JSONObject js = new JSONObject();
+
+            if (mIsCreate) {
+                Log.e(TAG, "it seems that we haven't created this in database yet");
+                return null;
+            } //采用的是第一种构造方式，自然实施初始化而已，显示错误：没创建数据库
+
+            JSONObject note = new JSONObject();
+            if (mType == Notes.TYPE_NOTE) { //类型为note时//判断类型是否note类型
+                note.put(NoteColumns.ID, mId); //设置以下12个内部变量
+                note.put(NoteColumns.ALERTED_DATE, mAlertDate);//提醒时间
+                note.put(NoteColumns.BG_COLOR_ID, mBgColorId);//背景颜色
+                note.put(NoteColumns.CREATED_DATE, mCreatedDate);//创建日期
+                note.put(NoteColumns.HAS_ATTACHMENT, mHasAttachment);
+                note.put(NoteColumns.MODIFIED_DATE, mModifiedDate);//修改日期
+                note.put(NoteColumns.PARENT_ID, mParentId);
+                note.put(NoteColumns.SNIPPET, mSnippet);//摘要
+                note.put(NoteColumns.TYPE, mType);//类型
+                note.put(NoteColumns.WIDGET_ID, mWidgetId);
+                note.put(NoteColumns.WIDGET_TYPE, mWidgetType);//小部件类型
+                note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);//最初的父类
+                js.put(GTaskStringUtils.META_HEAD_NOTE, note);;//将这个便签存入元数据中
+
+
+                JSONArray dataArray = new JSONArray();
+                for (SqlData sqlData : mDataList) {
+                    JSONObject data = sqlData.getContent();
+                    if (data != null) {
+                        dataArray.put(data);
+                    }
+                }
+                js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
+            } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {  //类型为文件夹或者系统时
+                note.put(NoteColumns.ID, mId);
+                note.put(NoteColumns.TYPE, mType);
+                note.put(NoteColumns.SNIPPET, mSnippet);
+                js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+            }
+            //对于文件夹类型或者系统文件夹类型，将id，类型，以及摘要，存入jsonobject,然后对应META_HEAD_NOTE键，存入共享，其实也只有那么多可以传输
+
+            return js;
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    //功能描述：给当前id设置父id
+
+    public void setParentId(long id) {
+        mParentId = id;
+        mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
+    }
+
+    //功能描述：给当前id设置Gtaskid
+
+    public void setGtaskId(String gid) {
+        mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
+    }
+
+    //功能描述：给当前id设置同步id
+
+    public void setSyncId(long syncId) {
+        mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
+    }
+
+    //功能描述：将本地修改初始化，即撤销当前所有修改
+
+    public void resetLocalModified() {
+        mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
+    }
+
+    //功能描述：获得当前id
+
+    public long getId() {
+        return mId;
+    }
+
+    //功能描述：获得当前id的父id
+    public long getParentId() {
+        return mParentId;
+    }
+
+    //功能描述：获取小片段，即用于显示的部分便签内容
+    public String getSnippet() {
+        return mSnippet;
+    }
+
+    //功能描述：判断是否为便签类型
+    public boolean isNoteType() {
+        return mType == Notes.TYPE_NOTE;
+    }
+
+    //功能描述：commit函数，作用于把当前所做的修改传送并保存在数据库中
+    public void commit(boolean validateVersion) {
+        if (mIsCreate) {
+            if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
+                mDiffNoteValues.remove(NoteColumns.ID);
+                //如果是一个无效的id并且还含有这个id，就将它移除
+            }
+
+            Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);
+            //插入便签的uri
+            try {
+                mId = Long.valueOf(uri.getPathSegments().get(1));
+                //强制转换path为id  ，Long型
+            } catch (NumberFormatException e) {
+                Log.e(TAG, "Get note id error :" + e.toString());
+                throw new ActionFailureException("create note failed");
+            }  //捕获异常，转换出错，显示错误“获取note的id出现错误”
+            if (mId == 0) {
+                throw new IllegalStateException("Create thread id failed");
+            } //创建线程 id 失败
+
+            if (mType == Notes.TYPE_NOTE) {  //对于note类型，引用sqlData.commit
+                for (SqlData sqlData : mDataList) {  //直接使用sqldata中实现
+                    sqlData.commit(mId, false, -1);
+                }
+            }
+        } else {
+            if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {
+                Log.e(TAG, "No such note"); //判断是否含有这个便签
+                throw new IllegalStateException("Try to update note with invalid id");
+                //如果没有就是无效id
+            }
+            if (mDiffNoteValues.size() > 0) {
+                mVersion ++;
+                int result = 0;
+                if (!validateVersion) { //构造字符串
+                    result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+                            + NoteColumns.ID + "=?)", new String[] {
+                        String.valueOf(mId)
+                    });
+                } else {
+                    result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+                            + NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
+                            new String[] {
+                                    String.valueOf(mId), String.valueOf(mVersion)
+                            });
+                }
+                if (result == 0) {
+                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                }  //如果没有更新，可能是用户在同步的时候更新了
+            }
+
+            if (mType == Notes.TYPE_NOTE) {
+                for (SqlData sqlData : mDataList) {
+                    sqlData.commit(mId, validateVersion, mVersion);
+                }
+            }  //对note类型，还是对其中的data引用commit，从而实现目的
+        }
+
+        // refresh local info
+        //刷新本地信息
+        loadFromCursor(mId);
+        if (mType == Notes.TYPE_NOTE)
+            loadDataContent();  //如果是便签类型，获取共享数据并加载到数据库
+
+        mDiffNoteValues.clear(); //清空共享数据
+        mIsCreate = false; //重置
+    }
+}

other/06_210340054金佳艺_代码标注/Task.java

@@ -0,0 +1,365 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+  //Task代码注释
+  //主要作用：同步任务，将创建、更新和同步动作包装成JSON对象，同时使用本地和远程的JSON对结点内容进行设置，从而获取同步信息，实现本地和远程的信息同步
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+
+public class Task extends Node {  //定义一个Task类,继承Node类
+    private static final String TAG = Task.class.getSimpleName();
+    //调用函数得到类简写名称并存入字符串TAG内
+    private boolean mCompleted; //判断当前任务是否完成
+
+    private String mNotes;  //在实例中存储数据的类型，表示任务的注释信息
+
+    private JSONObject mMetaInfo; //将在实例中存储数据的类型
+
+    private Task mPriorSibling;  //对应的优先兄弟Task的指针
+
+    private TaskList mParent;  //所在的任务列表的指针
+
+    public Task() {
+        super();
+        mCompleted = false;
+        mNotes = null;
+        mPriorSibling = null;  //TaskList中当前Task前面的Task的指针
+        mParent = null;  //当前Task所在的TaskList
+        mMetaInfo = null;
+    }
+
+    public JSONObject getCreateAction(int actionId) {
+        //getCreateAction方法接收一个整型参数actionId，将该参数作为返回JSONObject对象的action_id属性值。
+        JSONObject js = new JSONObject();
+
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,  //存入当前task指针
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+        //发送对actiontype的请求
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+            // index 父任务列表中的索引
+            js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this));  //设置索引
+
+            // entity_delta
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());  //获取任务名
+            entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");  //对任务创建id进行判空操作
+            entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE, //实体类数据
+                    GTaskStringUtils.GTASK_JSON_TYPE_TASK);
+            if (getNotes() != null) {
+                entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
+            }  //若存在文本输入放入实体内
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);  //讲实体存入js
+
+            // parent_id
+            js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid()); //父类id类型
+
+            // dest_parent_type
+            js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE,
+                    GTaskStringUtils.GTASK_JSON_TYPE_GROUP); //所在列表的id存入父id
+
+            // list_id
+            js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
+
+            // prior_sibling_id
+            if (mPriorSibling != null) {
+                js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid());
+            }
+            //如果该任务在兄弟任务中不是第一个，则设置prior_sibling_id属性值为前一个兄弟任务的gid
+            //将其优先存入ID序列中
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());  //e.toString()获取异常类型和异常详细消息
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate task-create jsonobject");
+        } //抛出异常处理机制
+
+        return js;
+    }
+
+    public JSONObject getUpdateAction(int actionId) {  //更新action
+        //getUpdateAction方法接收一个整型参数actionId，将该参数作为返回JSONObject对象的action_id属性值
+        JSONObject js = new JSONObject();
+
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+            //action_type属性值为update，表示更新操作
+
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+            // id
+            js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
+
+            // entity_delta
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+            if (getNotes() != null) {
+                entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
+            }//如果存在 notes ，则将其也放入 entity 中
+            entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+            //deleted属性表示任务是否被删除，如果该值为true，则该任务会被移除
+
+        } catch (JSONException e) { //获取异常
+            Log.e(TAG, e.toString());
+            e.printStackTrace();  //命令行打印异常信息在程序中出错的位置及原因
+            throw new ActionFailureException("fail to generate task-update jsonobject");
+        }  //生成任务更新的数据传输失败
+
+        return js;
+    }
+
+    public void setContentByRemoteJSON(JSONObject js)  //通过云端传输数据设置内容
+    //定义了一个setContentByRemoteJSON方法，该方法从远程JSON对象中获取任务的属性值，并将这些属性值设置到本地任务对象中
+    //表示从远程服务器获取的任务信息
+
+    {
+        if (js != null) {
+            try {
+                // id
+                if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {  //如果js指针指向的目标存在
+                    setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));  //利用类自身的set函数，并且使用了JSONObject的get类型函数
+                }  //判断记录是否被删除
+
+                // last_modified
+                if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
+                    setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
+                }
+
+                // name
+                if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
+                    setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
+                }
+
+                // notes
+                if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) {
+                    setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES));
+                }
+
+                // deleted
+                if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) {
+                    setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED));
+                }
+
+                // completed
+                if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) {
+                    setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED));
+                } //记录已经完成的
+            } catch (JSONException e) {  //抛出异常
+                Log.e(TAG, e.toString());  //获取异常类型和异常信息
+                e.printStackTrace();  //打印
+                throw new ActionFailureException("fail to get task content from jsonobject");
+            }
+        }
+    }
+
+    public void setContentByLocalJSON(JSONObject js) {  //通过本地的jsonobject获取内容
+        if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)
+                || !js.has(GTaskStringUtils.META_HEAD_DATA)) {  //如果js不存在或者js没有元数据的开头或者js指针没有元数据
+            Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");  //反馈给用户出错信息
+        }
+
+        try {
+            JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+            JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+
+            if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) { //note类型不匹配
+                Log.e(TAG, "invalid type");  //无效
+                return;
+            }
+
+            for (int i = 0; i < dataArray.length(); i++) {
+                //遍历 dataArray 查找与数据库中DataConstants.NOTE 记录信息一致的 data
+                JSONObject data = dataArray.getJSONObject(i);
+                if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
+                    setName(data.getString(DataColumns.CONTENT));  //判断两个字符串是否相等
+                    break;
+                }
+            }
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+    }
+
+    public JSONObject getLocalJSONFromContent() {  //从content获取本地json
+        String name = getName(); //获取名称
+        try {
+            if (mMetaInfo == null) {
+                // new task created from web
+                if (name == null) {
+                    Log.w(TAG, "the note seems to be an empty one");
+                    return null;
+                }
+                //若命名为空则创建一个新的
+
+                JSONObject js = new JSONObject();
+                JSONObject note = new JSONObject();
+                JSONArray dataArray = new JSONArray();
+                JSONObject data = new JSONObject();  //对四个指针进行初始化
+                data.put(DataColumns.CONTENT, name);
+                dataArray.put(data);
+                js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);  //元数据类型信息非空，则进行同步更新操作
+                note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+                js.put(GTaskStringUtils.META_HEAD_NOTE, note);  //实现数据同步
+                return js;
+            } else {  //否则将元数据同步至数据中
+                // synced task
+                JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE); //同步任务
+                JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA); //同步数据
+
+                for (int i = 0; i < dataArray.length(); i++) {
+                    JSONObject data = dataArray.getJSONObject(i);
+                    if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
+                        data.put(DataColumns.CONTENT, getName());
+                        break;
+                    }
+                }//通过循环查找与数据库中DataConstants.NOTE 记录信息一致的 data
+
+                note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+                return mMetaInfo;
+            }
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public void setMetaInfo(MetaData metaData) { //设置元数据信息
+        if (metaData != null && metaData.getNotes() != null) {
+            try {
+                mMetaInfo = new JSONObject(metaData.getNotes());
+            } catch (JSONException e) {
+                Log.w(TAG, e.toString());
+                mMetaInfo = null;
+            }
+        }  //如果元数据非空且其 notes 非空，则修改元数据类型信息
+    }
+
+    public int getSyncAction(Cursor c) {  //实现同步操作
+        try {
+            JSONObject noteInfo = null;  //新建一个 JSONObject 的对象实体
+            if (mMetaInfo != null && mMetaInfo.has(GTaskStringUtils.META_HEAD_NOTE)) {
+                noteInfo = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+            } //元数据信息不为空并且元数据信息还含有“META_HEAD_NOTE”，说明便签存在
+
+            if (noteInfo == null) {
+                Log.w(TAG, "it seems that note meta has been deleted");
+                return SYNC_ACTION_UPDATE_REMOTE;
+            }  //云端便签 id 已被删除，不存在，返回更新本地数据的同步行为
+
+            if (!noteInfo.has(NoteColumns.ID)) {
+                Log.w(TAG, "remote note id seems to be deleted");
+                return SYNC_ACTION_UPDATE_LOCAL;
+            }  //匹配note的id
+
+            // validate the note id now
+            if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) {
+                Log.w(TAG, "note id doesn't match");
+                return SYNC_ACTION_UPDATE_LOCAL;  //判断修改后的ID匹配是否成功，成功则返回无同步操作，未成功则应用云端到本地，返回本地同步更新操作
+            }
+
+            if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
+                // there is no local update
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    // no update both side
+                    return SYNC_ACTION_NONE;
+                } else {
+                    // apply remote to local
+                    return SYNC_ACTION_UPDATE_LOCAL;
+                }
+            } else {
+                // validate gtask id
+                if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
+                    //判断gtask的id与获取的id是否匹配
+                    Log.e(TAG, "gtask id doesn't match"); //错误，未找到 gtask 的 id
+                    return SYNC_ACTION_ERROR;
+                }
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    ////错误，未找到 gtask 的 id
+                    // local modification only
+                    return SYNC_ACTION_UPDATE_REMOTE;
+                } else {
+                    return SYNC_ACTION_UPDATE_CONFLICT;
+                }
+            }
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+
+        return SYNC_ACTION_ERROR;
+    }
+
+    public boolean isWorthSaving() {  //判断是否修改并同步操作
+        return mMetaInfo != null || (getName() != null && getName().trim().length() > 0)
+                || (getNotes() != null && getNotes().trim().length() > 0);
+    }
+
+    public void setCompleted(boolean completed) {
+        this.mCompleted = completed;
+    }  //设定是否完成的成员变量
+
+    public void setNotes(String notes) {
+        this.mNotes = notes;
+    }  //设定note成员变量
+
+    public void setPriorSibling(Task priorSibling) {
+        this.mPriorSibling = priorSibling;
+    }  //设置优先兄弟 task 的优先级
+
+    public void setParent(TaskList parent) {
+        this.mParent = parent;
+    }  //设置父类节点
+
+    public boolean getCompleted() {
+        return this.mCompleted;
+    }  //判断是否完成
+
+    public String getNotes() {
+        return this.mNotes;
+    }  //获取成员变量 mNotes 的信息
+
+    public Task getPriorSibling() {
+        return this.mPriorSibling;
+    }  //获取优先兄弟列表
+
+    public TaskList getParent() {
+        return this.mParent;
+    }  //获取父类节点列表
+
+}

other/06_210340054金佳艺_代码标注/TaskList.java

@@ -0,0 +1,431 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+  //TaskList代码标注
+  //主要作用：同步任务列表，将Task组织成同步任务列表进行管理
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+
+
+public class TaskList extends Node {//创建继承 Node的任务表类
+    private static final String TAG = TaskList.class.getSimpleName();  //tag标记
+    //调用getSimplename（）函数获取名字并赋值给TAG作为标记
+    private int mIndex;  //当前TaskList的指针
+
+    private ArrayList<Task> mChildren;  //类中主要的保存数据的单元，用来实现一个以Task为元素的ArrayList
+
+
+    public TaskList() {  //构造函数进行初始化
+        super();  //调用父类构造方法
+        mChildren = new ArrayList<Task>();  //声明数组
+        mIndex = 1;
+    }
+
+    /* (non-Javadoc)
+     * @see net.micode.notes.gtask.data.Node#getCreateAction(int)
+     * 生成并返回一个包含了一定数据的JSONObject实体
+     */
+
+    public JSONObject getCreateAction(int actionId) {
+        JSONObject js = new JSONObject();  //直接构建即直接实例化一个JSONObject对象
+
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+            //操作的是列表，而不只是单个task了
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+            // index
+            js.put(GTaskStringUtils.GTASK_JSON_INDEX, mIndex);
+
+            // entity_delta
+            // 新建一个 JSONObject 对象，名为实体，将 name，creator id，entity type 三个信息存在一起
+            JSONObject entity = new JSONObject();  //创建一个实体类并进行初始化
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+            //getName是父类的一个函数
+            entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
+            //初始化id
+            entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
+                    GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
+            //将实体类型设置为“GROUP”
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate tasklist-create jsonobject");
+        }
+
+        return js;
+    }
+
+    /* (non-Javadoc)
+     * @see net.micode.notes.gtask.data.Node#getUpdateAction(int)
+     * 生成并返回一个包含了一定数据的JSONObject实体
+     */
+
+    public JSONObject getUpdateAction(int actionId) {  //接受更新action，返回jsonobject
+        JSONObject js = new JSONObject();  //创建一个对象并进行初始化
+
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+            // id
+            js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
+
+            // entity_delta
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+            entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate tasklist-update jsonobject");
+        }
+
+        return js;
+    }
+
+    public void setContentByRemoteJSON(JSONObject js) {
+        //通过云端 JSON 数据设置实例化对象 js 的内容
+        if (js != null) {
+            try {
+                // id
+                if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
+                    setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
+                }
+                //判断js对象是否为空，如果为空即没有内容就不需要进行设置了
+
+                // last_modified
+                if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
+                    setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
+                }
+                //调用JSONObject中的getLong函数，得到last_modified的号，并作为参数传给setLastModified函数（父类函数）进行设置
+
+                // name
+                if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
+                    setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
+                }  //对任务的name进行设置
+
+            } catch (JSONException e) {
+                Log.e(TAG, e.toString());
+                e.printStackTrace();
+                throw new ActionFailureException("fail to get tasklist content from jsonobject");
+            }
+        }
+    }
+
+    public void setContentByLocalJSON(JSONObject js) {  //通过本地 JSON 数据设置对象 js 内容
+        if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)) {
+            //若 js 创建失败或 js 中不存在 META_HEAD_NOTE信息
+            Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
+        }  //警告，没有可用资源
+
+        try {
+            JSONObject folder = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+            //NullPointerException这个异常出现在处理对象时对象不存在但又没有捕捉到进行处理的时候
+
+            if (folder.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
+                //对文件夹，设置文件名
+                String name = folder.getString(NoteColumns.SNIPPET);
+                //获取文件夹片段字符串作为文件夹名称
+                setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + name);
+                //设置名称为MIUI系统文件夹前缀+文件夹名称
+            } else if (folder.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
+                //判断是不是系统文件
+                if (folder.getLong(NoteColumns.ID) == Notes.ID_ROOT_FOLDER)
+                    setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT);
+                    //如果是根文件夹，设置名称：MIUI系统文件夹前缀+默认文件夹名称
+                else if (folder.getLong(NoteColumns.ID) == Notes.ID_CALL_RECORD_FOLDER)
+                    setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                            + GTaskStringUtils.FOLDER_CALL_NOTE);
+                    //如果是通话文件夹，设置名称：MIUI系统文件夹前缀+通话便签文件夹名称
+                else
+                    Log.e(TAG, "invalid system folder");
+                ;//无效系统文件夹警告
+            } else {
+                Log.e(TAG, "error type");
+                //错误的文件夹类型
+            }
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+    }
+
+    public JSONObject getLocalJSONFromContent() {  //从content获取本地json
+        try {
+            JSONObject js = new JSONObject();  //创建对象并初始化
+            JSONObject folder = new JSONObject();  //创建文件夹对象并初始化
+
+            String folderName = getName();
+            if (getName().startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX))
+                folderName = folderName.substring(GTaskStringUtils.MIUI_FOLDER_PREFFIX.length(),
+                        folderName.length());
+            folder.put(NoteColumns.SNIPPET, folderName);
+            //如果获取的文件夹名称是以[MIUI_Notes]开头，则文件夹名称应删掉前缀
+            if (folderName.equals(GTaskStringUtils.FOLDER_DEFAULT)
+                    || folderName.equals(GTaskStringUtils.FOLDER_CALL_NOTE))
+                folder.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+                //这里与上一个函数setContentByRemoteJSON(JSONObject js)是一个逆过程，可以参看上一个函数是如何构造出foldername的
+            else
+                folder.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
+
+            js.put(GTaskStringUtils.META_HEAD_NOTE, folder);
+
+            return js;
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public int getSyncAction(Cursor c) {  //获取同步信息
+        try {
+            if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) { //若本地修改未记录
+                // there is no local update
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    //记录最后一次修改
+                    // no update both side
+                    return SYNC_ACTION_NONE;
+                } else {
+                    // apply remote to local
+                    return SYNC_ACTION_UPDATE_LOCAL;
+                }  //匹配失败，返回更新本地数据的同步行为
+            } else {
+                // validate gtask id
+                if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
+                    Log.e(TAG, "gtask id doesn't match");
+                    return SYNC_ACTION_ERROR;
+                }  //如果获取的ID不匹配，返回同步动作失败
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    // local modification only
+                    return SYNC_ACTION_UPDATE_REMOTE;
+                    //如果是最近一次修改的 id，则返回云端更新的同步动作
+                } else {
+                    // for folder conflicts, just apply local modification
+                    return SYNC_ACTION_UPDATE_REMOTE;
+                }
+            }
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+
+        return SYNC_ACTION_ERROR;
+    }
+
+
+     // @return
+     //功能：获得TaskList的大小，即mChildren的大小
+
+    public int getChildTaskCount() {
+
+        return mChildren.size();
+    }
+
+    //获得TaskList的大小，即mChildren的大小，mChildren 是TaskList 的一个实例
+     //@param task
+     //@return 返回值为是否成功添加任务。
+     //功能：在当前任务表末尾添加新的任务。
+
+    public boolean addChildTask(Task task) {
+        boolean ret = false;
+        if (task != null && !mChildren.contains(task)) { //任务非空且任务表中不存在该任务
+            ret = mChildren.add(task);
+            if (ret) {
+                // need to set prior sibling and parent
+                task.setPriorSibling(mChildren.isEmpty() ? null : mChildren
+                        .get(mChildren.size() - 1));
+                task.setParent(this);
+                //ArrayList的每一次修改变化都要紧跟相关Task中PriorSibling的修改
+            }
+        }
+        return ret;
+    }
+
+    /**
+     * @param task
+     * @param index
+     * @return
+     * 功能：在当前任务表的指定位置添加新的任务。
+     */
+
+    public boolean addChildTask(Task task, int index) {
+        if (index < 0 || index > mChildren.size()) {
+            Log.e(TAG, "add child task: invalid index");
+            return false;
+        }
+        //在当前任务表的指定位置添加新的任务，index是指针
+
+        int pos = mChildren.indexOf(task);
+        if (task != null && pos == -1) {
+            mChildren.add(index, task);
+            //获取要添加的任务在列表中的位置，如果不在列表中则返回-1
+
+            // update the task list
+            Task preTask = null; //更新任务表
+            Task afterTask = null;
+            if (index != 0)
+                preTask = mChildren.get(index - 1);
+            if (index != mChildren.size() - 1)
+                afterTask = mChildren.get(index + 1);
+
+            task.setPriorSibling(preTask); //使得前后三个任务连在一起
+            if (afterTask != null)
+                afterTask.setPriorSibling(task);
+        }
+
+        return true;
+    }
+
+    /**
+     * @param task
+     * @return 返回删除是否成功
+     * 功能：删除TaskList中的一个Task
+     */
+
+    public boolean removeChildTask(Task task) { //删除任务表中的子任务
+        boolean ret = false;
+        int index = mChildren.indexOf(task); //获取该任务在任务表中的索引
+        if (index != -1) {  //索引有效，任务在表中存在
+            ret = mChildren.remove(task);  //移除任务
+
+            if (ret) {
+                // reset prior sibling and parent
+                task.setPriorSibling(null);
+                task.setParent(null);  //删除成功，task的上一个任务指针和父指针置空
+
+                // update the task list
+                if (index != mChildren.size()) {
+                    mChildren.get(index).setPriorSibling(
+                            index == 0 ? null : mChildren.get(index - 1));
+                }  //删除成功后，要对任务列表进行更新
+            }
+        }
+        return ret;
+    }
+
+    /**
+     * @param task
+     * @param index
+     * @return
+     * 功能：将当前TaskList中含有的某个Task移到index位置
+     */
+
+    public boolean moveChildTask(Task task, int index) {
+
+        if (index < 0 || index >= mChildren.size()) {
+            Log.e(TAG, "move child task: invalid index");
+            return false;
+        }
+
+        int pos = mChildren.indexOf(task);
+        if (pos == -1) {
+            Log.e(TAG, "move child task: the task should in the list");
+            return false;
+        }
+
+        if (pos == index)
+            return true;
+        return (removeChildTask(task) && addChildTask(task, index));
+    }
+    //利用已经实现好的功能完成当下功能
+
+    /**
+     * @param gid
+     * @return返回寻找结果
+     * 功能：按gid寻找Task
+     */
+
+    public Task findChildTaskByGid(String gid) {
+        for (int i = 0; i < mChildren.size(); i++) {
+            Task t = mChildren.get(i);
+            if (t.getGid().equals(gid)) {
+                return t;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * @param task
+     * @return
+     * 功能：返回指定Task的index
+     */
+    public int getChildTaskIndex(Task task) {
+        return mChildren.indexOf(task);
+    }
+
+    /**
+     * @param index
+     * @return
+     * 功能：返回指定index的Task
+     */
+    public Task getChildTaskByIndex(int index) {
+        if (index < 0 || index >= mChildren.size()) {
+            Log.e(TAG, "getTaskByIndex: invalid index");  //如果指针不在范围内，无效索引
+            return null;
+        }
+        return mChildren.get(index);
+    }
+
+    /**
+     * @param gid
+     * @return
+     * 功能：返回指定gid的Task
+     */
+    public Task getChilTaskByGid(String gid) {
+        for (Task task : mChildren) { //ArrayList的遍历方法 //通过索引获取子任务
+            if (task.getGid().equals(gid))
+                return task;
+        }
+        return null;
+    }
+
+    public ArrayList<Task> getChildTaskList() {
+        return this.mChildren;
+    }  //获取子任务列表
+
+    public void setIndex(int index) {
+        this.mIndex = index;
+    }  //设置任务索引
+
+    public int getIndex() {
+        return this.mIndex;
+    } //获取任务索引
+}

other/06_210340061林亭旭_代码标注/NoteEditText.java

@@ -0,0 +1,264 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.content.Context;//抽象类，提供了一组通用的API,通过 Context才能识别调用者
+import android.graphics.Rect;
+import android.text.Layout;
+import android.text.Selection;
+import android.text.Spanned;
+import android.text.TextUtils;
+import android.text.style.URLSpan;
+import android.util.AttributeSet;
+import android.util.Log;
+import android.view.ContextMenu;
+import android.view.KeyEvent;
+import android.view.MenuItem;
+import android.view.MenuItem.OnMenuItemClickListener;
+import android.view.MotionEvent;
+import android.widget.EditText;
+
+import net.micode.notes.R;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class NoteEditText extends EditText {//NoteEditText继承EditText的部分属性，设置便签与文本框
+    private static final String TAG = "NoteEditText";
+    private int mIndex;
+    private int mSelectionStartBeforeDelete;//
+
+    private static final String SCHEME_TEL = "tel:" ;//建立电话数据。
+    private static final String SCHEME_HTTP = "http:" ;//建立网站数据
+    private static final String SCHEME_EMAIL = "mailto:" ;//建立邮箱数据
+
+    private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
+    //建立由字符和整数的hash表，链接电话数据、网站数据与邮箱数据
+    static {
+        sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
+        sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
+        sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
+    }
+
+    /**
+     * Call by the {@link NoteEditActivity} to delete or add edit text
+     */
+    //在NoteEditActivity中进行删除或添加文本的操作，并对进行更改的数据进行标记
+    public interface OnTextViewChangeListener {
+        /**
+         * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
+         * and the text is null
+         */
+        //当｛@link KeyEvent#KEYCODE_DEL｝发生并且文本为空时删除当前编辑文本
+        void onEditTextDelete(int index, String text);
+
+        /**
+         * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
+         * happen
+         */
+        //当｛@link KeyEvent#KEYCODE_ENTER｝发生时，在当前编辑文本后添加编辑文本
+        void onEditTextEnter(int index, String text);
+
+        /**
+         * Hide or show item option when text change
+         */
+        //文本更改时隐藏或显示项目选项
+        void onTextChange(int index, boolean hasText);
+    }
+
+    private OnTextViewChangeListener mOnTextViewChangeListener;
+
+    public NoteEditText(Context context) {
+        super(context, null);//用super引用父类变量
+        mIndex = 0;
+    }//根据context设置文本
+
+
+    public void setIndex(int index) {
+        mIndex = index;
+    }//设置光标，并对光标进行初始化
+
+
+    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
+        mOnTextViewChangeListener = listener;
+    }//令listener赋值给mOnTextViewChangeListener实现文本修改标记初始化
+
+    public NoteEditText(Context context, AttributeSet attrs) {
+        super(context, attrs, android.R.attr.editTextStyle);
+    }//规定context控件属性，便于维护便签动态变化的属性
+
+    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        // TODO Auto-generated constructor stub
+    }//通过类型定义和引用父类变量，实现defStyle的自动初始化
+
+    @Override
+    //view里的函数，处理手机屏幕的所有事件
+    /*参数event为手机屏幕触摸事件封装类的对象，其中封装了该事件的所有信息，
+                例如触摸的位置、触摸的类型以及触摸的时间等。该对象会在用户触摸手机屏幕时被创建。*/
+
+    public boolean onTouchEvent(MotionEvent event) {
+        switch (event.getAction()) {
+            //对每一次屏幕被按下的情况进行重述
+            case MotionEvent.ACTION_DOWN:
+                //更新触屏坐标值
+                int x = (int) event.getX();
+                int y = (int) event.getY();
+                x -= getTotalPaddingLeft();
+                y -= getTotalPaddingTop();
+                x += getScrollX();
+                y += getScrollY();
+
+                Layout layout = getLayout();
+                //运用布局控件Layout对每一次的坐标新值x，y进行设置新位置
+                int line = layout.getLineForVertical(y);
+                int off = layout.getOffsetForHorizontal(line, x);
+                Selection.setSelection(getText(), off);
+                //同过selection寻找并更新当前光标新坐标值
+                break;
+        }
+
+        return super.onTouchEvent(event);
+        //回溯至函数，实现对每一次触屏事件的计算
+    }
+
+    @Override
+    // 函数功能：处理用户按下一个键盘按键时会触发 的事件
+
+    public boolean onKeyDown(int keyCode, KeyEvent event) //当作为一个构造函数（带有运算符 new）调用时，Boolean() 将把它的参数转换成一个布尔值，并且返回一个包含该值的 Boolean 对象
+    {
+        switch (keyCode) {//根据按键的unicode编码值判断
+            case KeyEvent.KEYCODE_ENTER://按键编码值传入系统
+                if (mOnTextViewChangeListener != null)//对输入命令进行判空
+                {
+                    return false;//对非法输入进行错误提示
+                }
+                break;
+            case KeyEvent.KEYCODE_DEL://删除按键
+                mSelectionStartBeforeDelete = getSelectionStart();
+                break;
+            default:
+                break;
+        }
+        return super.onKeyDown(keyCode, event);//继续进行父类其他点击事件
+    }
+
+    @Override
+    // 函数功能：处理用户松开一个键盘按键时会触发 的事件
+
+    public boolean onKeyUp(int keyCode, KeyEvent event) {
+        switch(keyCode) {
+            //根据按键Unicode编码值进行操作，包括进入和删除两种操作
+            case KeyEvent.KEYCODE_DEL:
+                if (mOnTextViewChangeListener != null) //判断是否被修改
+                {
+                    if (0 == mSelectionStartBeforeDelete && mIndex != 0)//判断是否有被编辑修改并且文档不为空
+                    {
+                        mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
+                        ////利用上文OnTextViewChangeListener对KEYCODE_DEL按键情况的删除函数进行删除
+                        return true;
+                    }
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not seted");
+                    //出现其他情况进行报错，文档修改监听器未被建立
+                }
+                break;
+            case KeyEvent.KEYCODE_ENTER://对监听器错误情况进行判断
+                if (mOnTextViewChangeListener != null) {
+                    int selectionStart = getSelectionStart();//获取当前起始位置
+                    String text = getText().subSequence(selectionStart, length()).toString();//获取当前文本
+                    setText(getText().subSequence(0, selectionStart));//根据获取文本设置当前文本
+                    mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
+                    //当错误发生及当{@link KeyEvent#KEYCODE_ENTER}时添加新文本
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not seted");////其他情况报错，文档的改动监听器并没有建立
+                }
+                break;
+            default:
+                break;
+        }
+        return super.onKeyUp(keyCode, event);
+        //回溯至前面函数继续执行父类的其他按键弹起的事件
+    }
+
+    @Override
+    //函数功能：当焦点发生变化时，会自动调用该方法来处理焦点改变的事件
+    //     * 参数：focused表示触发该事件的View是否获得了焦点，当该控件获得焦点时，Focused等于true，否则等于false。
+    //           direction表示焦点移动的方向，用数值表示
+    //           Rect：表示在触发事件的View的坐标系中，前一个获得焦点的矩形区域，即表示焦点是从哪里来的。如果不可用则为null
+    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
+        if (mOnTextViewChangeListener != null) //判断监听器是否建立
+        {
+            if (!focused && TextUtils.isEmpty(getText())) //截取焦点并且判断文本是否为空
+            {
+                mOnTextViewChangeListener.onTextChange(mIndex, false);
+                //mOnTextViewChangeListener子函数，置false隐藏事件选项
+            } else {
+                mOnTextViewChangeListener.onTextChange(mIndex, true);
+                //mOnTextViewChangeListener子函数，置true显示事件选项
+            }
+        }
+        super.onFocusChanged(focused, direction, previouslyFocusedRect);
+        //回溯至前面函数继续执行父类的其他焦点变化事件
+    }
+
+    @Override
+    //函数意义：生成上下文菜单
+    protected void onCreateContextMenu(ContextMenu menu) {
+        if (getText() instanceof Spanned) //判断文本是否存在
+        {
+            int selStart = getSelectionStart();
+            int selEnd = getSelectionEnd();
+            //获取开始位置和截至位置
+            int min = Math.min(selStart, selEnd);
+            int max = Math.max(selStart, selEnd);
+            //计算开始到结尾的最大值和最小值
+            final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
+            //设置url信息范围值
+            if (urls.length == 1) {
+                int defaultResId = 0;
+                for(String schema: sSchemaActionResMap.keySet()) //获取计划表中的所有key值
+                {
+                    if(urls[0].getURL().indexOf(schema) >= 0) //若url可以添加则在添加后将defaultResId置为key所映射的值
+                    {
+                        defaultResId = sSchemaActionResMap.get(schema);
+                        break;
+                    }
+                }
+
+                if (defaultResId == 0) //defaultResId == 0则说明url并没有添加任何东西，所以置为连接其他SchemaActionResMap的值
+                {
+                    defaultResId = R.string.note_link_other;
+                }
+
+                menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener//建立菜单
+                        (
+                                new OnMenuItemClickListener() //新建按键监听器
+                                {
+                                    public boolean onMenuItemClick(MenuItem item) {
+                                        // goto a new intent
+                                        urls[0].onClick(NoteEditText.this);//根据文本进行按键设置
+                                        return true;
+                                    }
+                                });
+            }
+        }
+        super.onCreateContextMenu(menu);
+        //回溯至前面函数继续执行父类的其他菜单创建的事件
+    }
+}
+

other/06_210340061林亭旭_代码标注/NoteItemData.java

@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.ui;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.text.TextUtils;
+
+import net.micode.notes.data.Contact;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.tool.DataUtils;
+
+
+public class NoteItemData {
+    static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,//备注列ID
+        NoteColumns.ALERTED_DATE,//提醒日期
+        NoteColumns.BG_COLOR_ID,//背景ID颜色
+        NoteColumns.CREATED_DATE,//创建数据
+        NoteColumns.HAS_ATTACHMENT, //具有附件
+        NoteColumns.MODIFIED_DATE,//修改数据
+        NoteColumns.NOTES_COUNT,//备注计数
+        NoteColumns.PARENT_ID,//家长ID
+        NoteColumns.SNIPPET,//片段
+        NoteColumns.TYPE,//类型
+        NoteColumns.WIDGET_ID,//部件ID
+        NoteColumns.WIDGET_TYPE,//部件类型
+    };
+
+    private static final int ID_COLUMN                    = 0;//ID列
+    private static final int ALERTED_DATE_COLUMN          = 1;//警报日期列
+    private static final int BG_COLOR_ID_COLUMN           = 2;//背景颜色ID列
+    private static final int CREATED_DATE_COLUMN          = 3;//创建日期列
+    private static final int HAS_ATTACHMENT_COLUMN        = 4;//具有附件列
+    private static final int MODIFIED_DATE_COLUMN         = 5;//修改日期列
+    private static final int NOTES_COUNT_COLUMN           = 6;//备注计数列
+    private static final int PARENT_ID_COLUMN             = 7;//父ID列
+    private static final int SNIPPET_COLUMN               = 8;//代码段列
+    private static final int TYPE_COLUMN                  = 9;//类型栏
+    private static final int WIDGET_ID_COLUMN             = 10;//小部件ID列
+    private static final int WIDGET_TYPE_COLUMN           = 11;//小部件类型列
+
+    private long mId;
+    private long mAlertDate;
+    private int mBgColorId;
+    private long mCreatedDate;
+    private boolean mHasAttachment;
+    private long mModifiedDate;
+    private int mNotesCount;
+    private long mParentId;
+    private String mSnippet;
+    private int mType;
+    private int mWidgetId;
+    private int mWidgetType;
+    private String mName;
+    private String mPhoneNumber;
+
+    private boolean mIsLastItem;
+    private boolean mIsFirstItem;
+    private boolean mIsOnlyOneItem;
+    private boolean mIsOneNoteFollowingFolder;
+    private boolean mIsMultiNotesFollowingFolder;
+
+    public NoteItemData(Context context, Cursor cursor) //利用光标cursor获取数据初始化NoteItemData
+    {
+        mId = cursor.getLong(ID_COLUMN);
+        //将数据类型变为long类
+        mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
+        //将数据类型变为long类
+        mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
+        //将数据类型变为int类
+        mCreatedDate = cursor.getLong(CREATED_DATE_COLUMN);
+        //将数据类型变为long类
+        mHasAttachment = (cursor.getInt(HAS_ATTACHMENT_COLUMN) > 0) ? true : false;
+        //对HAS_ATTACHMENT_COLUMN进行判0，>0为ture否则为false
+        mModifiedDate = cursor.getLong(MODIFIED_DATE_COLUMN);
+        //将数据类型变为long类
+        mNotesCount = cursor.getInt(NOTES_COUNT_COLUMN);
+        //将数据类型变为int类
+        mParentId = cursor.getLong(PARENT_ID_COLUMN);
+        //将数据类型变为long类
+        mSnippet = cursor.getString(SNIPPET_COLUMN);
+        //将数据类型变为string类
+        mSnippet = mSnippet.replace(NoteEditActivity.TAG_CHECKED, "").replace(
+                NoteEditActivity.TAG_UNCHECKED, "");
+        mType = cursor.getInt(TYPE_COLUMN);
+        mWidgetId = cursor.getInt(WIDGET_ID_COLUMN);
+        mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN);
+
+        mPhoneNumber = "";
+        //初始化电话号码信息
+        if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
+            mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId);
+            if (!TextUtils.isEmpty(mPhoneNumber))//mphonenumber里有符合字符串，则用contart功能连接
+            {
+                mName = Contact.getContact(context, mPhoneNumber);
+                if (mName == null)//如果用户姓名为空，则令姓名等于电话号
+                {
+                    mName = mPhoneNumber;
+                }
+            }
+        }
+
+        if (mName == null)//若名字为空，则输入名字
+        {
+            mName = "";
+        }
+        checkPostion(cursor);
+    }
+    //据鼠标的位置设置标记，记录位置
+    private void checkPostion(Cursor cursor) {
+        //初始化标记
+        mIsLastItem = cursor.isLast() ? true : false;//寻找光标最后位置
+        mIsFirstItem = cursor.isFirst() ? true : false;//寻找光标的初始位置
+        mIsOnlyOneItem = (cursor.getCount() == 1);//记录是否遍历完所有路程
+        //初始化“多重子文件”“单一子文件”
+        mIsMultiNotesFollowingFolder = false;
+        mIsOneNoteFollowingFolder = false;
+
+        //设置标记
+        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {//若此时标记为note格式并且不为第一个元素
+            int position = cursor.getPosition();//用getPosition得到此时位置
+            if (cursor.moveToPrevious()) {//获取光标位置后，回溯至上一行，
+                if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
+                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {//若光标满足系统格式或note格式
+                    if (cursor.getCount() > (position + 1))//如果得到的步数大于地址+1
+                    {
+                        mIsMultiNotesFollowingFolder = true;//若是数据行数大于但前位置+1则设置成正确
+                    } else {
+                        mIsOneNoteFollowingFolder = true;//否则单一文件夹标记为true
+                    }
+                }
+                if (!cursor.moveToNext()) {//若不能再往下走则报错
+                    throw new IllegalStateException("cursor move to previous but can't move back");
+                }
+            }
+        }
+    }
+    public boolean isOneFollowingFolder() {
+        return mIsOneNoteFollowingFolder;
+    }//文件夹注释行
+
+    public boolean isMultiFollowingFolder() {
+        return mIsMultiNotesFollowingFolder;
+    }
+
+    public boolean isLast() {
+        return mIsLastItem;
+    }
+
+    public String getCallName() {
+        return mName;
+    }//得到用户名
+
+    public boolean isFirst() {
+        return mIsFirstItem;
+    }//得到初始地址
+
+    public boolean isSingle() {
+        return mIsOnlyOneItem;
+    }
+
+    public long getId() {
+        return mId;
+    }
+
+    public long getAlertDate() {
+        return mAlertDate;
+    }
+
+    public long getCreatedDate() {
+        return mCreatedDate;
+    }
+
+    public boolean hasAttachment() {
+        return mHasAttachment;
+    }
+
+    public long getModifiedDate() {
+        return mModifiedDate;
+    }
+
+    public int getBgColorId() {
+        return mBgColorId;
+    }
+
+    public long getParentId() {
+        return mParentId;
+    }
+
+    public int getNotesCount() {
+        return mNotesCount;
+    }
+
+    public long getFolderId () {
+        return mParentId;
+    }
+
+    public int getType() {
+        return mType;
+    }
+
+    public int getWidgetType() {
+        return mWidgetType;
+    }
+
+    public int getWidgetId() {
+        return mWidgetId;
+    }
+
+    public String getSnippet() {
+        return mSnippet;
+    }
+
+    public boolean hasAlert() {
+        return (mAlertDate > 0);
+    }
+
+    //若数据父id为保存至文件夹模式的id且满足电话号码单元不为空，则isCallRecord为true
+    public boolean isCallRecord() {
+        return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
+    }
+
+    public static int getNoteType(Cursor cursor) {
+        return cursor.getInt(TYPE_COLUMN);
+    }
+}
+

other/06_210340061林亭旭_代码标注/SqlNote.java

@@ -0,0 +1,554 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.appwidget.AppWidgetManager;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+import net.micode.notes.tool.ResourceParser;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+
+
+public class SqlNote {
+    private static final String TAG/*私有静态常量*/ = SqlNote.class.getSimpleName();
+
+    private static final int INVALID_ID = -99999;//无效的 ID
+
+    public static final String[] PROJECTION_NOTE = new String[]
+            //需要在查询中选择的笔记属性
+            {
+            NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
+            NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
+            NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE,
+            NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.SYNC_ID,
+            NoteColumns.LOCAL_MODIFIED, NoteColumns.ORIGIN_PARENT_ID, NoteColumns.GTASK_ID,
+            NoteColumns.VERSION
+    };
+
+    public static final int ID_COLUMN = 0;//ID 属性在 PROJECTION_NOTE 数组中的下标为 0
+
+    public static final int ALERTED_DATE_COLUMN = 1;
+
+    public static final int BG_COLOR_ID_COLUMN = 2;
+
+    public static final int CREATED_DATE_COLUMN = 3;
+
+    public static final int HAS_ATTACHMENT_COLUMN = 4;
+
+    public static final int MODIFIED_DATE_COLUMN = 5;
+
+    public static final int NOTES_COUNT_COLUMN = 6;
+
+    public static final int PARENT_ID_COLUMN = 7;
+
+    public static final int SNIPPET_COLUMN = 8;
+
+    public static final int TYPE_COLUMN = 9;
+
+    public static final int WIDGET_ID_COLUMN = 10;
+
+    public static final int WIDGET_TYPE_COLUMN = 11;
+
+    public static final int SYNC_ID_COLUMN = 12;
+
+    public static final int LOCAL_MODIFIED_COLUMN = 13;
+
+    public static final int ORIGIN_PARENT_ID_COLUMN = 14;
+
+    public static final int GTASK_ID_COLUMN = 15;
+
+    public static final int VERSION_COLUMN = 16;
+
+    private Context mContext;//上下文
+
+    private ContentResolver mContentResolver;//ContentResolver 对象
+
+    private boolean mIsCreate;//表示是否在数据库中创建新笔记
+
+    private long mId;//笔记的 ID
+
+    private long mAlertDate;//提醒日期
+
+    private int mBgColorId;//背景颜色 ID
+
+    private long mCreatedDate;//创建日期
+
+    private int mHasAttachment;//是否有附件
+
+    private long mModifiedDate;//修改日期
+
+    private long mParentId;//父笔记 ID
+
+    private String mSnippet;//笔记的摘要
+
+    private int mType;//笔记类型
+
+    private int mWidgetId;//小部件 ID
+
+    private int mWidgetType;//小部件类型
+
+    private long mOriginParent;//原始父笔记 ID
+
+    private long mVersion;//版本号
+
+    private ContentValues mDiffNoteValues;// ContentValues 类型的 mDiffNoteValues
+
+    private ArrayList<SqlData> mDataList;//SqlData 对象的列表
+
+    public SqlNote(Context context) {
+        mContext = context;
+        mContentResolver = context.getContentResolver();
+        //将传入的上下文对象赋值给成员变量 mContext 和 mContentResolver
+        mIsCreate = true;
+        //将 mIsCreate 置为 true，表示该笔记是要被创建的
+        mId = INVALID_ID;
+        //mId 赋值为常量 INVALID_ID，表示该笔记的 ID 是无效的
+        mAlertDate = 0;
+        mBgColorId = ResourceParser.getDefaultBgId(context);//
+        // 将 mBgColorId 设为默认背景颜色 ID；
+        mCreatedDate = System.currentTimeMillis();
+        // 将 mCreatedDate 和 mModifiedDate 设为当前时间戳。
+        mHasAttachment = 0;
+        //mHasAttachment 设为 0，表示该笔记没有附件
+        mModifiedDate = System.currentTimeMillis();
+        mParentId = 0;
+        //mParentId 设为 0，表示该笔记的父 ID 是无效的
+        mSnippet = "";//mSnippet 设为空字符串，表示该笔记没有摘要
+        mType = Notes.TYPE_NOTE;
+        mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;//该笔记没有小部件 ID
+        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;//该笔记不是小部件
+        mOriginParent = 0;//该笔记没有原始父笔记
+        mVersion = 0;//笔记的版本号是 0
+        mDiffNoteValues = new ContentValues();
+        //建一个空的 ContentValues 对象赋值给 mDiffNoteValues
+        mDataList = new ArrayList<SqlData>();
+        //创建一个空的 SqlData 对象列表 mDataList
+    }
+
+    public SqlNote(Context context, Cursor c)
+    //将传入的 Cursor 对象中的数据加载到 SqlNote 对象中
+    {
+        mContext = context;
+        mContentResolver = context.getContentResolver();
+        //分别赋值为传入的上下文
+        mIsCreate = false;//这是一个已经存在的笔记
+        loadFromCursor(c);//从 Cursor 对象中读取数据并加载到 SqlNote 对象中
+        mDataList = new ArrayList<SqlData>();//创建一个空的 SqlData 对象列表 mDataList
+        if (mType == Notes.TYPE_NOTE)
+            //如果该笔记是普通笔记，则调用 loadDataContent() 方法从数据库读取笔记内容和附件信息
+            loadDataContent();
+        mDiffNoteValues = new ContentValues();
+        //创建一个空的 ContentValues 对象赋值给 mDiffNoteValues
+    }
+
+    public SqlNote(Context context, long id)
+    //根据笔记 ID 加载笔记数据
+    {
+        mContext = context;
+        mContentResolver = context.getContentResolver();//初始化
+        mIsCreate = false;//已经存在的笔记
+        loadFromCursor(id);
+        mDataList = new ArrayList<SqlData>();
+        if (mType == Notes.TYPE_NOTE)
+            loadDataContent();
+        mDiffNoteValues = new ContentValues();
+//创建一个空的 ContentValues 对象赋值给 mDiffNoteValues
+    }
+
+    private void loadFromCursor(long id)
+    //根据给定的笔记 ID 从数据库中加载笔记信息
+    {
+        Cursor c = null;
+        try {
+            c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
+                   //查询指定 ID 的笔记数据
+                    new String[] {
+                        String.valueOf(id)
+                    }, null);//对获取数据进行判空
+            if (c != null) {
+                c.moveToNext();
+                loadFromCursor(c);
+                // 不为空，将游标移动到第一行，
+                // 并调用 loadFromCursor(Cursor c) 方法将数据加载到 SqlNote 对象中
+            } else {
+                Log.w(TAG, "loadFromCursor: cursor = null");//为空，则打印一条警告日志
+            }
+        } finally {
+            if (c != null)
+                c.close();
+        }
+    }
+
+    private void loadFromCursor(Cursor c)
+    //从 Cursor 对象中加载笔记数据
+    {
+        mId = c.getLong(ID_COLUMN);//笔记的 ID
+        mAlertDate = c.getLong(ALERTED_DATE_COLUMN);//提醒时间
+        mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);//背景颜色 ID
+        mCreatedDate = c.getLong(CREATED_DATE_COLUMN);//创建时间
+        mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);//是否有附件
+        mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);//修改时间
+        mParentId = c.getLong(PARENT_ID_COLUMN);//父亲笔记的 ID
+        mSnippet = c.getString(SNIPPET_COLUMN);//笔记片段
+        mType = c.getInt(TYPE_COLUMN);//笔记类型
+        mWidgetId = c.getInt(WIDGET_ID_COLUMN);//挂件 ID
+        mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);//挂件类型
+        mVersion = c.getLong(VERSION_COLUMN);//版本号
+    }
+
+    private void loadDataContent()
+    //从数据库中读取笔记的内容和附件信息，并将其存储在 mDataList
+    {
+        Cursor c = null;
+        mDataList.clear();
+        //清空 mDataList 列表
+        try {
+            c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
+                    "(note_id=?)", new String[] {
+                        String.valueOf(mId)
+                    }, null);//判断获取到的 Cursor 对象是否为空
+            if (c != null) {// 不为空，则判断游标中是否有数据
+                if (c.getCount() == 0) {
+                    Log.w(TAG, "it seems that the note has not data");
+                    //无数据，则打印一条警告日志并返回
+                    return;
+                }
+                while (c.moveToNext()) {
+                    SqlData data = new SqlData(mContext, c);
+                    mDataList.add(data);
+                }//遍历游标中的每一行数据，创建 SqlData 对象并添加到 mDataList 列表
+            } else {
+                Log.w(TAG, "loadDataContent: cursor = null");
+            }
+        } finally {
+            if (c != null)
+                c.close();
+        }
+    }
+
+    public boolean setContent(JSONObject js)
+    //据传入的 JSONObject 对象设置笔记的内容
+    {
+        try {
+            JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+            if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
+                Log.w(TAG, "cannot set system folder");
+            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
+                // for folder we can only update the snnipet and type
+                String snippet = note.has(NoteColumns.SNIPPET) ? note
+                        .getString(NoteColumns.SNIPPET) : "";
+                if (mIsCreate || !mSnippet.equals(snippet)) {
+                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+                }
+                mSnippet = snippet;
+
+                int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+                        : Notes.TYPE_NOTE;
+                if (mIsCreate || mType != type) {
+                    mDiffNoteValues.put(NoteColumns.TYPE, type);
+                }
+                mType = type;
+            } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
+                JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+                long id = note.has(NoteColumns.ID) ? note.getLong(NoteColumns.ID) : INVALID_ID;
+                if (mIsCreate || mId != id) {
+                    mDiffNoteValues.put(NoteColumns.ID, id);
+                }
+                mId = id;
+
+                long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note
+                        .getLong(NoteColumns.ALERTED_DATE) : 0;
+                if (mIsCreate || mAlertDate != alertDate) {
+                    mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
+                }
+                mAlertDate = alertDate;
+
+                int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note
+                        .getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
+                if (mIsCreate || mBgColorId != bgColorId) {
+                    mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
+                }
+                mBgColorId = bgColorId;
+//系统文件夹或者文件夹类型的笔记，只能更新摘要和类型，而对于笔记类型的笔记，会解析出一系列字段，并将它们保存在一个 List 中
+                long createDate = note.has(NoteColumns.CREATED_DATE) ? note
+                        .getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
+                if (mIsCreate || mCreatedDate != createDate) {
+                    mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
+                }
+                mCreatedDate = createDate;
+
+                int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
+                        .getInt(NoteColumns.HAS_ATTACHMENT) : 0;
+                if (mIsCreate || mHasAttachment != hasAttachment) {
+                    mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
+                }
+                mHasAttachment = hasAttachment;
+
+                long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note
+                        .getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
+                if (mIsCreate || mModifiedDate != modifiedDate) {
+                    mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
+                }
+                mModifiedDate = modifiedDate;
+
+                long parentId = note.has(NoteColumns.PARENT_ID) ? note
+                        .getLong(NoteColumns.PARENT_ID) : 0;
+                if (mIsCreate || mParentId != parentId) {
+                    mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
+                }
+                mParentId = parentId;
+
+                String snippet = note.has(NoteColumns.SNIPPET) ? note
+                        .getString(NoteColumns.SNIPPET) : "";
+                if (mIsCreate || !mSnippet.equals(snippet)) {
+                    mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+                }
+                mSnippet = snippet;
+
+                int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+                        : Notes.TYPE_NOTE;
+                if (mIsCreate || mType != type) {
+                    mDiffNoteValues.put(NoteColumns.TYPE, type);
+                }
+                mType = type;
+
+                int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)
+                        : AppWidgetManager.INVALID_APPWIDGET_ID;
+                if (mIsCreate || mWidgetId != widgetId) {
+                    mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
+                }
+                mWidgetId = widgetId;
+
+                int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note
+                        .getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
+                if (mIsCreate || mWidgetType != widgetType) {
+                    mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
+                }
+                mWidgetType = widgetType;
+
+                long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
+                        .getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
+                if (mIsCreate || mOriginParent != originParent) {
+                    mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
+                }
+                mOriginParent = originParent;
+//分别解析
+                for (int i = 0; i < dataArray.length(); i++)
+
+                {
+                    JSONObject data = dataArray.getJSONObject(i);
+                    SqlData sqlData = null;//未找到设置为null
+                    if (data.has(DataColumns.ID)) //根据数据块 ID 在 mDataList 中查找对应的 SqlData 对象
+                         {
+                        long dataId = data.getLong(DataColumns.ID);//赋值
+                        for (SqlData temp : mDataList) {
+                            if (dataId == temp.getId()) {
+                                sqlData = temp;
+                            }
+                        }
+                    }
+
+                    if (sqlData == null) {
+                        sqlData = new SqlData(mContext);
+                        mDataList.add(sqlData);//没找到对像，则新建一个对象并添加到 mDataList 中
+                    }
+
+                    sqlData.setContent(data);
+                }
+            }
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return false;
+        }//当 JSON 解析出错时，将会抛出 JSONException 异常并被 catch 住
+        return true;
+    }
+
+    public JSONObject getContent()
+    //将 SqlData 对象转换为 JSONObject
+     {
+        try {
+            JSONObject js = new JSONObject();
+            //判断 SqlData 对象是否已经存入数据库中
+
+            if (mIsCreate) {
+                Log.e(TAG, "it seems that we haven't created this in database yet");
+                return null;
+                //未存储，返回 null
+            }
+
+            JSONObject note = new JSONObject();
+            if (mType == Notes.TYPE_NOTE) {
+                note.put(NoteColumns.ID, mId);
+                note.put(NoteColumns.ALERTED_DATE, mAlertDate);
+                note.put(NoteColumns.BG_COLOR_ID, mBgColorId);
+                note.put(NoteColumns.CREATED_DATE, mCreatedDate);
+                note.put(NoteColumns.HAS_ATTACHMENT, mHasAttachment);
+                note.put(NoteColumns.MODIFIED_DATE, mModifiedDate);
+                note.put(NoteColumns.PARENT_ID, mParentId);
+                note.put(NoteColumns.SNIPPET, mSnippet);
+                note.put(NoteColumns.TYPE, mType);
+                note.put(NoteColumns.WIDGET_ID, mWidgetId);
+                note.put(NoteColumns.WIDGET_TYPE, mWidgetType);
+                note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);
+                js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+
+                JSONArray dataArray = new JSONArray();
+                for (SqlData sqlData : mDataList) {
+                    JSONObject data = sqlData.getContent();
+                    if (data != null) {
+                        dataArray.put(data);
+                    }
+                }//根据 SqlData 对象的类型不同，分别构造 Note 和 Data 两个 JSONObject，
+                // 并放入 META_HEAD_NOTE 和 META_HEAD_DATA 字段中
+                js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
+            } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {
+                note.put(NoteColumns.ID, mId);
+                note.put(NoteColumns.TYPE, mType);
+                note.put(NoteColumns.SNIPPET, mSnippet);
+                js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+            }
+
+            return js;//将其内容转换为 JSONObject 对象并返回
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+        return null;//遇到错误会打印日志并返回 null
+    }
+
+    public void setParentId(long id)
+    //设置 SqlData 对象的父节点 ID
+    {
+        mParentId = id;
+        mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
+    }
+
+    public void setGtaskId(String gid) {
+        mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
+    }
+
+    public void setSyncId(long syncId) {
+        mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
+    }
+
+    public void resetLocalModified() {
+        mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
+    }
+
+    public long getId() {
+        return mId;
+    }
+
+    public long getParentId() {
+        return mParentId;
+    }
+
+    public String getSnippet() {
+        return mSnippet;
+    }
+
+    public boolean isNoteType() {
+        return mType == Notes.TYPE_NOTE;
+    }
+
+    public void commit(boolean validateVersion)
+    //将 SqlData 对象中的属性变化保存到数据库中
+    {
+        if (mIsCreate)
+        //判断该对象是新创建的还是已经存在于数据库中
+        {
+            if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
+                mDiffNoteValues.remove(NoteColumns.ID);
+            }
+
+            Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);
+            //新建的对象，则调用 insert 方法将其保存到数据库中
+            try {
+                mId = Long.valueOf(uri.getPathSegments().get(1));
+            } catch (NumberFormatException e) {
+                Log.e(TAG, "Get note id error :" + e.toString());
+                throw new ActionFailureException("create note failed");
+            }
+            if (mId == 0) {
+                throw new IllegalStateException("Create thread id failed");
+            }//对是否为新值进行判定
+
+            if (mType == Notes.TYPE_NOTE) {
+                for (SqlData sqlData : mDataList) {
+                    sqlData.commit(mId, false, -1);
+                    //validateVersion 参数指定为 false，mVersion 参数指定为 -1
+                }
+            }
+        } else {
+            if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {
+                Log.e(TAG, "No such note");
+                throw new IllegalStateException("Try to update note with invalid id");
+            }
+            //判断当前对象的 ID 是否合法，如果不合法则抛出异常
+            if (mDiffNoteValues.size() > 0) {
+                mVersion ++;
+                int result = 0;
+                if (!validateVersion) {
+                    result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+                            + NoteColumns.ID + "=?)", new String[] {
+                        String.valueOf(mId)
+                    });
+                } else {
+                    result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+                            + NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
+                            new String[] {
+                                    String.valueOf(mId), String.valueOf(mVersion)
+                            });
+                }
+                if (result == 0) {
+                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                }
+            }//判断笔记是否被成功更新，并在更新失败时输出一些日志信息。
+
+            if (mType == Notes.TYPE_NOTE)//检查当前对象是否表示笔记对象
+                 {
+                for (SqlData sqlData : mDataList) {
+                    sqlData.commit(mId, validateVersion, mVersion);//对比参数，不对校验版本号
+                }
+            }
+        }
+
+        // refresh local info
+        loadFromCursor(mId);//逐一转换为 SqlData 对象，并添加到 mDataList 变量中
+        if (mType == Notes.TYPE_NOTE)//加载笔记内容
+            loadDataContent();
+
+        mDiffNoteValues.clear();//清空 mDiffNoteValues 变量
+        mIsCreate = false;//标记设置为 false，表示当前对象已经存在于数据库中
+    }
+}

other/06_210340061林亭旭_代码标注/Task.java

@@ -0,0 +1,396 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+
+package net.micode.notes.gtask.data;
+//包含了一些用于处理GTask（Google Task）相关数据的类。具体来说，这些类实现了将本地笔记同步到Google Task中，以及从Google Task中同步笔记到本地的功能。
+
+import android.database.Cursor;//引入Android类cursor（为Android提供接口用于访问数据源中的数据，并支持对数据进行查询、排序、更新等操作。）
+import android.text.TextUtils;// 引入Android类TextUtilsAndroid提供的一个工具类，包含了一些字符串处理相关的方法，如检查字符串是否为空、去除字符串两端的空格等
+import android.util.Log;//引入Android类Log是Android提供的一个工具类，用于在开发和调试过程中输出日志信息
+
+import net.micode.notes.data.Notes;//是该应用程序中的一个关键类，定义了笔记和数据表的结构
+import net.micode.notes.data.Notes.DataColumns;//笔记表子类，定义了笔记表中的各个字段
+import net.micode.notes.data.Notes.DataConstants;//是一个接口，定义了一些常量，如便签类型、便签状态等
+import net.micode.notes.data.Notes.NoteColumns;//笔记表子类，定义了笔记表中的各个字段
+import net.micode.notes.gtask.exception.ActionFailureException;//是自定义异常类，表示某个操作失败了
+import net.micode.notes.tool.GTaskStringUtils;//是一个字符串处理工具类，定义了一些与Google Task有关的字符串处理方法
+
+import org.json.JSONArray;//是一个表示JSON数组的类，可以方便地读取和操作JSON数组中的元素。
+import org.json.JSONException;//是一个异常类，表示在解析JSON数据时发生了错误。
+import org.json.JSONObject;//是一个表示JSON对象的类，可以方便地读取和操作JSON对象中的属性和值。
+public class Task extends Node//定义了一个Task类，继承自Node类
+{
+    private static final String TAG = Task.class.getSimpleName();
+
+    private boolean mCompleted;//表示任务是否已完成
+
+    private String mNotes;//表示任务的注释信息
+
+    private JSONObject mMetaInfo;//表示任务的元信息，是一个JSONObject对象
+
+    private Task mPriorSibling;//表示该任务在同级任务中的前一个任务对象
+
+    private TaskList mParent;//表示该任务所属的任务列表对象
+
+    public Task() {
+        super();
+        mCompleted = false;
+        mNotes = null;
+        mPriorSibling = null;
+        mParent = null;
+        mMetaInfo = null;
+    }//无参构造函数，初始化所有属性值均为null或false
+
+    public JSONObject getCreateAction(int actionId)
+    //getCreateAction方法接收一个整型参数actionId，将该参数作为返回JSONObject对象的action_id属性值。
+    {
+        JSONObject js = new JSONObject();
+
+        try {
+            // action_type,创建操作
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+
+            // index，父任务列表中的索引
+            js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this));
+
+            // entity_delta一个JSONObject对象
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());//得到任务名
+            entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");//对任务创建者id进行判空操作
+            entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,//实体类数据task
+                    GTaskStringUtils.GTASK_JSON_TYPE_TASK);
+            if (getNotes() != null)
+            //如果任务有注释，则设置notes属性表示任务注释信息。
+            {
+                entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
+            }
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+
+            // parent_id
+            js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid());
+
+            // dest_parent_type
+            js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE,
+                    GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
+
+            // list_id
+            js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
+
+            // prior_sibling_id
+            if (mPriorSibling != null) {
+                js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid());
+            }
+            //如果该任务在兄弟任务中不是第一个，则设置prior_sibling_id属性值为前一个兄弟任务的gid。
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate task-create jsonobject");
+        }
+        //如果在生成JSONObject对象时发生异常，则会抛出一个自定义异常ActionFailureException。
+        return js;
+    }
+
+    public JSONObject getUpdateAction(int actionId)
+  //getUpdateAction方法接收一个整型参数actionId，将该参数作为返回JSONObject对象的action_id属性值
+    {
+        JSONObject js = new JSONObject();
+
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+            //action_type属性值为update，表示更新操作
+
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+            //id属性值为该任务的gid。
+            // id
+            js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
+
+            // entity_delta
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());//任务名称
+            if (getNotes() != null) {
+                entity.put(GTaskStringUtils.GTASK_JSON_NOTES, getNotes());
+            }//如果该任务有注释，则设置notes属性表示任务注释信息
+            entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+        }//deleted属性表示任务是否被删除，如果该值为true，则该任务会被移除
+        catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate task-update jsonobject");
+        }//如果在生成JSONObject对象时发生异常，则会抛出一个自定义异常ActionFailureException。
+
+        return js;
+    }
+
+    public void setContentByRemoteJSON(JSONObject js)
+    //定义了一个setContentByRemoteJSON方法，该方法从远程JSON对象中获取任务的属性值，并将这些属性值设置到本地任务对象中
+    //表示从远程服务器获取的任务信息
+    {
+        if (js != null) //首先检查传入的JSON对象是否为空，如果不是空对象，则依次从JSON对象中获取以下属性值
+        {
+            try {
+                // id
+                if (js.has(GTaskStringUtils.GTASK_JSON_ID))
+                    //id属性值，并调用setGid方法将其赋值给本地任务对象的gid属性
+                {
+                    setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
+                }
+
+                // last_modified
+                if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
+                    setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
+                }//last_modified属性值，并调用setLastModified方法将其赋值给本地任务对象的lastModified属性
+
+                // name
+                if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
+                    setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
+                }//name属性值，并调用setName方法将其赋值给本地任务对象的name属性
+
+                // notes
+                if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) {
+                    setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES));
+                }//notes属性值，并调用setNotes方法将其赋值给本地任务对象的notes属性
+
+                // deleted
+                if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) {
+                    setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED));
+                }//deleted属性值，并调用setDeleted方法将其赋值给本地任务对象的deleted属性
+
+                // completed
+                if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) {
+                    setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED));
+                }//completed属性值，并调用setCompleted方法将其赋值给本地任务对象的completed属性
+            } catch (JSONException e) {
+                Log.e(TAG, e.toString());
+                e.printStackTrace();
+                throw new ActionFailureException("fail to get task content from jsonobject");
+            }//如果在解析JSON对象时发生异常，则会抛出一个自定义异常ActionFailureException
+        }
+    }
+
+    public void setContentByLocalJSON(JSONObject js)
+    //定义了一个setContentByLocalJSON方法，该方法从本地JSON对象中获取任务的属性值，并将这些属性值设置到本地任务对象中
+           //setContentByLocalJSON方法接收一个JSONObject参数js，用来表示本地存储的任务信息
+    {
+        if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)
+                || !js.has(GTaskStringUtils.META_HEAD_DATA)) {
+            Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
+        }//该方法首先检查传入的JSON对象是否为空，以及是否包含必要属性。如果不满足这些条件，则打印一条警告日志并退出方法
+
+        try {
+            JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+            JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+//从JSON对象中获取META_HEAD_NOTE和META_HEAD_DATA属性的值，并分别赋给变量note和dataArray
+            if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) {
+                Log.e(TAG, "invalid type");
+                return;
+            }
+//该方法检查获取到的note对象的type属性是否为Notes.TYPE_NOTE，如果不是则打印一条错误日志并退出方法
+            for (int i = 0; i < dataArray.length(); i++) {
+                JSONObject data = dataArray.getJSONObject(i);
+                if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
+                    setName(data.getString(DataColumns.CONTENT));
+                    break;
+                }
+            }//该方法遍历dataArray数组中的每个元素，找到mime_type属性为DataConstants.NOTE的元素，并将其content属性值赋给本地任务对象的name属性
+
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }//如果在解析JSON对象时发生异常，则会打印一条错误日志
+    }
+
+    public JSONObject getLocalJSONFromContent()
+    //定义了一个getLocalJSONFromContent方法，该方法从本地任务对象中获取任务的属性值，并将这些属性值构造成JSON对象返回
+    {
+        String name = getName();
+        try {
+            if (mMetaInfo == null)//获取任务的名称
+                 {
+                // new task created from web
+                if (name == null) {
+                    Log.w(TAG, "the note seems to be an empty one");
+                    return null;
+                }
+//根据任务的元信息（即mMetaInfo属性），判断任务是从Web端创建还是同步而来。如果任务的元信息为空，则认为该任务是从Web端创建的。
+
+                JSONObject js = new JSONObject();
+                JSONObject note = new JSONObject();
+                JSONArray dataArray = new JSONArray();
+                JSONObject data = new JSONObject();
+                data.put(DataColumns.CONTENT, name);
+                dataArray.put(data);
+                js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
+                note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+                js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+                return js;//对于从Web端创建的任务，如果任务名称为空，则会打印一条警告日志并返回null。
+                     // 否则，该方法构造一个JSONObject对象，其中包含META_HEAD_DATA和META_HEAD_NOTE两个属性
+                     // 并将任务的名称设置为META_HEAD_DATA属性所表示的JSONArray对象中的data属性值
+            } else {
+                // synced task
+                JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+                JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+                //对于同步而来的任务，该方法首先获取任务的META_HEAD_DATA和META_HEAD_NOTE属性的值，
+                for (int i = 0; i < dataArray.length(); i++) {
+                    JSONObject data = dataArray.getJSONObject(i);
+                    if (TextUtils.equals(data.getString(DataColumns.MIME_TYPE), DataConstants.NOTE)) {
+                        data.put(DataColumns.CONTENT, getName());
+                        break;
+                    }
+                }//遍历META_HEAD_DATA属性值所表示的JSONArray对象中的所有元素，找到mime_type属性为DataConstants.NOTE的元素，并将其content属性值设置为本地任务对象的名称
+
+                note.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
+                return mMetaInfo;
+            }//最后，该方法将note对象的type属性设置为Notes.TYPE_NOTE，并返回元信息对应的JSONObject对象
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return null;
+        }//如果在构造JSON对象时发生异常，则会打印一条错误日志，并返回null
+    }
+
+    public void setMetaInfo(MetaData metaData) //用于设置mMetaInfo属性
+            //接收一个MetaData对象参数metaData
+    {
+        if (metaData != null && metaData.getNotes() != null) {
+            try {
+                mMetaInfo = new JSONObject(metaData.getNotes());
+            }
+            //metaData不为空并且其notes属性不为空字符串，则将notes属性值解析为JSON对象，并将其赋给mMetaInfo属性
+            catch (JSONException e) {
+                Log.w(TAG, e.toString());
+                mMetaInfo = null;
+            }//如果在解析JSON对象时发生异常，则会打印一条警告日志并将mMetaInfo属性赋为null
+        }//如果metaData对象或者其notes属性为空，则不会对mMetaInfo属性做任何更改
+    }
+
+    public int getSyncAction(Cursor c)
+    //用于返回同步任务的操作类型
+    {
+        try {
+            JSONObject noteInfo = null;
+            if (mMetaInfo != null && mMetaInfo.has(GTaskStringUtils.META_HEAD_NOTE)) {
+                noteInfo = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+            }//mMetaInfo属性,中获取与任务相关联的笔记信息
+
+            if (noteInfo == null) {
+                Log.w(TAG, "it seems that note meta has been deleted");
+                return SYNC_ACTION_UPDATE_REMOTE;
+            }//// 如果不存在，则会打印一条警告日志并返回SYNC_ACTION_UPDATE_REMOTE操作类型
+
+            if (!noteInfo.has(NoteColumns.ID)) {
+                Log.w(TAG, "remote note id seems to be deleted");
+                return SYNC_ACTION_UPDATE_LOCAL;
+            }//检查笔记信息中是否存在NoteColumns.ID属性，
+            // 如果不存在，则会打印一条警告日志并返回SYNC_ACTION_UPDATE_LOCAL操作类型
+
+            // validate the note id now
+            if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) {
+                Log.w(TAG, "note id doesn't match");
+                return SYNC_ACTION_UPDATE_LOCAL;
+            }//获取查询结果集c中的本地笔记的id属性值，并将其与笔记信息中的NoteColumns.ID属性值进行比较。
+            // 如果两者不相等，则会打印一条警告日志并返回SYNC_ACTION_UPDATE_LOCAL操作类型。
+
+            if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
+                // there is no local update
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    // no update both side
+                    return SYNC_ACTION_NONE;
+                } else {
+                    // apply remote to local
+                    return SYNC_ACTION_UPDATE_LOCAL;
+                }//根据本地笔记对象的LOCAL_MODIFIED_COLUMN属性值是否为0来确定是否存在本地更新。如果该属性值为0，则表示没有本地更新。
+                // 如果本地笔记对象的SYNC_ID_COLUMN属性值等于当前任务对象的最后修改时间，则表示两者都没有更新
+                // 返回SYNC_ACTION_NONE操作类型；否则，返回SYNC_ACTION_UPDATE_LOCAL操作类型。
+            } else {
+                // validate gtask id
+                if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
+                    Log.e(TAG, "gtask id doesn't match");
+                    return SYNC_ACTION_ERROR;
+                }
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    // local modification only
+                    return SYNC_ACTION_UPDATE_REMOTE;
+                } else {
+                    return SYNC_ACTION_UPDATE_CONFLICT;
+                }//如果本地笔记对象的LOCAL_MODIFIED_COLUMN属性值不为0，则表示存在本地更新。
+                // 此时，检查SqlNote.GTASK_ID_COLUMN属性值是否与当前任务对象的Google Task ID相等。
+                // 如果不相等，打印一条错误日志并返回SYNC_ACTION_ERROR操作类型。
+                // 接着，比较本地笔记对象的SYNC_ID_COLUMN属性值与getLastModified()方法返回值是否相等。
+                // 如果相等，则表示只存在本地更新，返回SYNC_ACTION_UPDATE_REMOTE操作类型；
+                // 否则，返回SYNC_ACTION_UPDATE_CONFLICT操作类型
+            }
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+
+        return SYNC_ACTION_ERROR;
+    }//如果在执行过程中发生异常，则会打印一条错误日志并返回SYNC_ACTION_ERROR操作类型。
+
+    public boolean isWorthSaving() {
+        return mMetaInfo != null || (getName() != null && getName().trim().length() > 0)
+                || (getNotes() != null && getNotes().trim().length() > 0);
+    }//isWorthSaving()方法用于判断当前任务对象是否值得保存，返回一个布尔值。
+    //该方法会判断以下三种情况，只要其中任意一种情况成立，则返回true，表示该任务对象值得保存：
+    //mMetaInfo属性不为null，即当前任务对象存在元信息。
+    //getName()方法返回值不为null且去除空格后长度大于0，表示当前任务对象的名称不为空。
+    //getNotes()方法返回值不为null且去除空格后长度大于0，表示当前任务对象的笔记内容不为空。
+    //如果上述所有条件都不成立，则返回false，表示当前任务对象不值得保存
+
+    public void setCompleted(boolean completed) {
+        this.mCompleted = completed;
+    }
+
+    public void setNotes(String notes) {
+        this.mNotes = notes;
+    }
+
+    public void setPriorSibling(Task priorSibling) {
+        this.mPriorSibling = priorSibling;
+    }
+
+    public void setParent(TaskList parent) {
+        this.mParent = parent;
+    }
+
+    public boolean getCompleted() {
+        return this.mCompleted;
+    }
+
+    public String getNotes() {
+        return this.mNotes;
+    }
+
+    public Task getPriorSibling() {
+        return this.mPriorSibling;
+    }
+
+    public TaskList getParent() {
+        return this.mParent;
+    }
+
+}

other/06_210340061林亭旭_代码标注/TaskList.java

@@ -0,0 +1,435 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.gtask.data;
+
+import android.database.Cursor;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.exception.ActionFailureException;
+import net.micode.notes.tool.GTaskStringUtils;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.ArrayList;
+
+
+public class TaskList extends Node
+//TaskList 类继承了 Node 类
+//    表示它是可以存储在树形结构中的一个节点
+//    TaskList 类有三个属性：mIndex、mChildren 和 TAG
+{
+    private static final String TAG = TaskList.class.getSimpleName();
+    //用于记录 TaskList 类的类名，方便在调试过程中进行日志记录和错误跟踪
+
+    private int mIndex;
+    //表示 TaskList 对象在树形结构中的序号。默认情况下，它被初始化为 1
+
+    private ArrayList<Task> mChildren;
+    // ArrayList<Task> 类型的属性，表示 TaskList 对象的子节点列表
+
+    public TaskList() {
+        super();
+        mChildren = new ArrayList<Task>();
+        mIndex = 1;
+    }
+
+    public JSONObject getCreateAction(int actionId)
+    //据当前文件夹对象的属性值，构造一个包含创建操作信息的 JSON 对象，并返回给调用者
+    {
+        JSONObject js = new JSONObject();
+//创建一个空的 JSONObject 对象 js
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+//添加 GTASK_JSON_ACTION_TYPE字段及对应的值
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+            // 添加GTASK_JSON_ACTION_ID字段及对应的值
+            // index
+            js.put(GTaskStringUtils.GTASK_JSON_INDEX, mIndex);
+
+            // entity_delta
+            // 添加GTASK_JSON_INDEX 和 GTASK_JSON_ENTITY_DELTA 等字段及对应的值。
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+            //创建一个包含实体信息的 JSONObject 对象 entity，并向其中添加文件夹名称 GTASK_JSON_NAME
+            entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
+            entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
+                    GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
+            //创建人 ID GTASK_JSON_CREATOR_ID 和实体类型 GTASK_JSON_ENTITY_TYPE 等字段及对应的值
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+//将 entity 对象作为值添加到父级 JSONObject 对象 js 中的 GTASK_JSON_ENTITY_DELTA 字段中
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate tasklist-create jsonobject");
+        }//如果生成 JSON 对象时出现异常，则记录错误日志并抛出 ActionFailureException 异常
+
+        return js;
+    }
+
+    public JSONObject getUpdateAction(int actionId)
+    //根据当前文件夹对象的属性值，构造一个包含更新操作信息的 JSON 对象，并返回给调用者
+    {
+        JSONObject js = new JSONObject();//创建一个空的 JSONObject 对象 js
+
+        try {
+            // action_type
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+//添加 GTASK_JSON_ACTION_TYPE字段及对应的值
+            // action_id
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+//添加GTASK_JSON_ACTION_ID字段及对应的值
+            // id
+            js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
+//添加GTASK_JSON_ID字段及对应的值
+            // entity_delta
+            JSONObject entity = new JSONObject();
+            entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
+            entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
+            //添加GTASK_JSON_DELETED字段及对应的值
+            js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
+////然后将 entity 对象作为值添加到父级 JSONObject 对象 js 中的 GTASK_JSON_ENTITY_DELTA 字段
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            throw new ActionFailureException("fail to generate tasklist-update jsonobject");
+        }
+        //如果生成 JSON 对象时出现异常，则记录错误日志并抛出 ActionFailureException 异常
+
+        return js;
+    }
+
+    public void setContentByRemoteJSON(JSONObject js)
+    //从给定的 JSONObject 对象 js 中读取云端 Google Tasks 的文件夹信息，并将其应用到当前的文件夹对象中
+    {
+        if (js != null)
+        //对输入进行判空
+        {
+            try {
+                // id
+                if (js.has(GTaskStringUtils.GTASK_JSON_ID))
+                //检查是否含有字段 GTASK_JSON_ID
+                {
+                    setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
+                }
+
+                // last_modified
+                if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
+                    setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
+                }//检查是否含有字段 GTASK_JSON_LAST_MODIFIED
+
+                // name
+                if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
+                    setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
+                }//检查是否含有字段GTASK_JSON_NAME
+
+            } catch (JSONException e) {
+                Log.e(TAG, e.toString());
+                e.printStackTrace();
+                throw new ActionFailureException("fail to get tasklist content from jsonobject");
+            }
+            //如果解析 JSON 对象时出现异常
+            // 则记录错误日志并抛出 ActionFailureException 异常
+        }
+    }
+
+    public void setContentByLocalJSON(JSONObject js)
+    //从给定的 JSONObject 对象 js 中读取文件夹信息，并将其应用到当前的文件夹对象中
+    {
+        if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)) {
+            Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
+        }
+        //如果输入的 JSON 对象为 null 或不含有 GTaskStringUtils.META_HEAD_NOTE 字段
+        // 则会记录警告日志并跳过后续处理
+
+        try {
+            JSONObject folder = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+//从 GTaskStringUtils.META_HEAD_NOTE 字段中获取 folder 子对象，并根据 NoteColumns.TYPE 属性判断文件夹类型
+            if (folder.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER)
+         //       如果文件夹类型是 Notes.TYPE_FOLDER
+        {
+                String name = folder.getString(NoteColumns.SNIPPET);//则从 NoteColumns.SNIPPET 属性中获取文件夹名称
+                setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + name);//为当前文件夹对象设置名称，以 GTaskStringUtils.MIUI_FOLDER_PREFFIX 作为前缀
+            } else if (folder.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM)
+            //如果文件夹类型是 Notes.TYPE_SYSTEM，
+            {
+                if (folder.getLong(NoteColumns.ID) == Notes.ID_ROOT_FOLDER)
+                    //根据 NoteColumns.ID 属性的值判断系统文件夹类型，并为当前文件夹对象设置相应的名称
+                    setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_DEFAULT);
+                else if (folder.getLong(NoteColumns.ID) == Notes.ID_CALL_RECORD_FOLDER)
+                    setName(GTaskStringUtils.MIUI_FOLDER_PREFFIX
+                            + GTaskStringUtils.FOLDER_CALL_NOTE);
+                else
+                    Log.e(TAG, "invalid system folder");
+            } else {
+                Log.e(TAG, "error type");
+            }//如果出现错误，则记录错误日志并跳过后续处理。如果文件夹类型不合法，则同样记录错误日志并跳过后续处理。
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+    }
+
+    public JSONObject getLocalJSONFromContent()
+    //将应用中的文件夹信息转换为 JSON 格式的方法
+            //返回一个包含文件夹信息的 JSONObject 对象
+    {
+        try {
+            JSONObject js = new JSONObject();
+            JSONObject folder = new JSONObject();
+//创建一个新的 JSONObject 对象
+// 并创建一个名为 folder 的子对象，用于存储文件夹的属性信息
+            String folderName = getName();
+            if (getName().startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX))
+                folderName = folderName.substring(GTaskStringUtils.MIUI_FOLDER_PREFFIX.length(),
+                        folderName.length());
+            //从当前文件夹对象中获取文件夹名称，并根据名称的前缀判断该文件夹是否是系统文件夹
+            folder.put(NoteColumns.SNIPPET, folderName);
+
+            if (folderName.equals(GTaskStringUtils.FOLDER_DEFAULT)
+                    || folderName.equals(GTaskStringUtils.FOLDER_CALL_NOTE))
+                folder.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+            // //如果是系统文件夹，则设置 NoteColumns.TYPE 属性为 Notes.TYPE_SYSTEM
+            else
+                folder.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);//否则设置为 Notes.TYPE_FOLDER
+
+            js.put(GTaskStringUtils.META_HEAD_NOTE, folder);
+//将文件夹的名称和类型信息添加到 folder 子对象中，并将 folder 作为 GTaskStringUtils.META_HEAD_NOTE 的值添加到主 JSONObject 中
+// 用于指定待更新笔记的文件夹信息。
+            return js;
+        } catch (JSONException e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+            return null;
+        }//如果转换过程中出现异常，则记录错误日志并返回 null
+    }
+
+    public int getSyncAction(Cursor c)
+//从给定的 Cursor 对象 c 中读取本地笔记的信息，并将其与云端笔记进行比较，
+// 从而决定应该执行哪种同步操作
+    {
+        try {
+            if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0)
+            //判断本地笔记是否有修改
+            {
+                // there is no local update
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    // no update both side
+                    //如果本地笔记没有被修改
+                    // 则进一步判断云端笔记的最后修改时间和本地笔记最后同步时间是否相等
+                    // 如果相等，则不需要更新，返回 SYNC_ACTION_NON
+                    return SYNC_ACTION_NONE;
+                } else {
+                    // apply remote to local
+                    //如果不相等，则需要将云端笔记的内容同步到本地，返回 SYNC_ACTION_UPDATE_LOCAL
+                    return SYNC_ACTION_UPDATE_LOCAL;
+                }
+            } else
+            //被修改过
+            {
+                // validate gtask id
+                if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid()))
+                //验证云端笔记的 ID 和本地笔记的 ID 是否匹配
+                {
+                    Log.e(TAG, "gtask id doesn't match");
+                    return SYNC_ACTION_ERROR;
+                }//如果不匹配，则说明出现了错误
+                // 返回 SYNC_ACTION_ERROR 表示同步失败
+                if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
+                    // local modification only
+                    return SYNC_ACTION_UPDATE_REMOTE;
+                    //如果 ID 匹配，则需要进一步判断本地笔记和云端笔记的最后修改时间。
+                    // 如果相等，则只需要将本地笔记同步到云端
+                    //返回 SYNC_ACTION_UPDATE_REMOTE
+                } else {
+                    // for folder conflicts, just apply local modification
+                    return SYNC_ACTION_UPDATE_REMOTE;
+                }//存在冲突，优先选择本地笔记的修改内容
+                // 返回 SYNC_ACTION_UPDATE_REMOTE
+            }
+        } catch (Exception e) {
+            Log.e(TAG, e.toString());
+            e.printStackTrace();
+        }
+
+        return SYNC_ACTION_ERROR;
+    }
+
+    public int getChildTaskCount() {
+        return mChildren.size();
+    }
+
+    public boolean addChildTask(Task task)
+    //向任务列表中添加指定的子任务
+    {
+        boolean ret = false;
+        if (task != null && !mChildren.contains(task))
+        //判断待添加的任务是否为空，并且是否已经存在于列表中
+            //如果待添加任务为空，或者已经在列表中，则直接返回添加失败
+        {
+            ret = mChildren.add(task);
+            if (ret) {
+                // need to set prior sibling and parent
+                task.setPriorSibling(mChildren.isEmpty() ? null : mChildren
+                        .get(mChildren.size() - 1));
+                task.setParent(this);//将待添加任务的前驱节点设置为列表中的最后一个任务（如果列表不为空,将其父节点设置为该任务列表的实例对象。
+            }//该方法返回操作结果，如果添加成功则返回 true，否则返回 false。
+
+        }
+        return ret;
+    }
+
+    public boolean addChildTask(Task task, int index)
+    //用于向任务列表中添加指定的子任务
+    {
+        if (index < 0 || index > mChildren.size())
+        //判断待添加任务的索引是否越界
+        {
+            Log.e(TAG, "add child task: invalid index");
+            return false;
+        }//越界则记录一条错误日志，并返回 false 表示添加失败
+
+        int pos = mChildren.indexOf(task);
+        if (task != null && pos == -1) {
+            mChildren.add(index, task);
+
+            // update the task list
+            Task preTask = null;
+            Task afterTask = null;
+            if (index != 0)//如果待添加任务不在列表中，则将其插入到指定位置上，并更新列表中其他任务的“父兄弟”关系
+                preTask = mChildren.get(index - 1);
+            //将待添加任务的前驱节点设置为索引 index - 1
+            if (index != mChildren.size() - 1)
+                afterTask = mChildren.get(index + 1);
+            //后继节点设置为索引 index + 1 的任务
+
+            task.setPriorSibling(preTask);
+            if (afterTask != null)
+                afterTask.setPriorSibling(task);
+        }
+
+        return true;
+    }//待添加任务已经在列表中，则不执行操作并直接返回 true 表示添加成功
+
+    public boolean removeChildTask(Task task)
+            //从任务列表中删除指定的子任务
+    {
+        boolean ret = false;
+        int index = mChildren.indexOf(task);
+        if (index != -1) {
+            ret = mChildren.remove(task);
+//通过 indexOf() 方法查找待删除任务在列表中的索引
+
+            if (ret) {
+                // reset prior sibling and parent
+                task.setPriorSibling(null);
+                task.setParent(null);
+              //执行删除操作,重置为 null
+
+                // update the task list
+                if (index != mChildren.size()) {
+                    mChildren.get(index).setPriorSibling(
+                            index == 0 ? null : mChildren.get(index - 1));
+                }
+                //更新列表中其他任务的关系：如果待删除任务的前一个任务存在，则将其设置为待删除任务的前驱节点；
+                // 否则，设置为 null。
+            }
+        }
+        return ret;
+    }
+
+    public boolean moveChildTask(Task task, int index)
+    //将指定的子任务移动到新的位置
+    {
+        if (index < 0 || index >= mChildren.size())//判断待移动任务的索引是否越界
+        {
+            Log.e(TAG, "move child task: invalid index");
+            return false;
+        }
+//若存在越界,返回 false 表示操作失败
+
+        int pos = mChildren.indexOf(task);
+        if (pos == -1) {
+            Log.e(TAG, "move child task: the task should in the list");
+            return false;
+        }//如果待移动任务不在列表中，则会记录一条错误日志，并返回 false 表示操作失败
+
+        if (pos == index)////如果待移动任务已经在列表中，并且新的索引与当前位置相同
+            return true;
+        return (removeChildTask(task) && addChildTask(task, index));
+    }//直接返回 true 表示操作成功
+
+    public Task findChildTaskByGid(String gid)
+    //根据子任务的GID（全局唯一标识符）查找指定的子任务
+    {
+        for (int i = 0; i < mChildren.size(); i++)
+        //当前任务列表节点下所有的子任务中依次查找，判断每个子任务的GID是否等于输入的参数gid
+        {
+            Task t = mChildren.get(i);
+            if (t.getGid().equals(gid)) {
+                return t;
+            }//若找到对应的子任务，则返回该子任务；
+        }
+        return null;
+    }//否则，返回null表示找不到指定的子任务
+
+    public int getChildTaskIndex(Task task) {
+        return mChildren.indexOf(task);
+    }
+
+    public Task getChildTaskByIndex(int index)
+    //根据子任务在任务列表中的位置获取指定的子任务
+    {
+        if (index < 0 || index >= mChildren.size())
+        {
+            Log.e(TAG, "getTaskByIndex: invalid index");
+            return null;
+        }//判断输入的参数index是否越界，如果小于0或大于等于当前子任务的个数，则会记录一条错误日志，并返回null
+        return mChildren.get(index);//返回该位置上对应的子任务
+    }
+
+    public Task getChilTaskByGid(String gid)
+    //根据子任务的GID（全局唯一标识符）查找指定的子任务
+    {
+        for (Task task : mChildren)
+            //遍历当前任务列表节点下所有的子任务，并依次判断每个子任务的GID是否等于输入的参数gid
+             {
+            if (task.getGid().equals(gid))
+                return task;
+        }
+        return null;
+    }
+    //若找到对应的子任务，则返回该子任务；否则，返回null表示找不到指定的子任务
+
+    public ArrayList<Task> getChildTaskList() {
+        return this.mChildren;
+    }
+
+    public void setIndex(int index) {
+        this.mIndex = index;
+    }
+
+    public int getIndex() {
+        return this.mIndex;
+    }
+}

src/Xiaominotes/.idea/.gitignore

@@ -1,3 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml

src/Xiaominotes/.idea/libraries/Gradle__androidx_activity_activity_1_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.activity:activity:1.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/2bd6b404abc619b7113462ddb7e38d41/jetified-activity-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/2bd6b404abc619b7113462ddb7e38d41/jetified-activity-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/2bd6b404abc619b7113462ddb7e38d41/jetified-activity-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.activity/activity/1.0.0/28eb83e6a29ac3fbb87aa632cfa0e644a313f491/activity-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_annotation_annotation_1_1_0.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.annotation:annotation:1.1.0">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.annotation/annotation/1.1.0/e3a6fb2f40e3a3842e6b7472628ba4ce416ea4c8/annotation-1.1.0.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.annotation/annotation/1.1.0/408af38ec57369afe3fd6466e1c4bfdd5f15fc92/annotation-1.1.0-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.annotation/annotation/1.1.0/8b7bdc00eb4d998bfbc76767b098620990f2a805/annotation-1.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_annotation_annotation_experimental_1_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.annotation:annotation-experimental:1.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/8b1826e082b884f9fc593d27a9580a45/jetified-annotation-experimental-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/8b1826e082b884f9fc593d27a9580a45/jetified-annotation-experimental-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/8b1826e082b884f9fc593d27a9580a45/jetified-annotation-experimental-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.annotation/annotation-experimental/1.0.0/2408f6cb8f31ffabdd88e1365f82914c251e44dc/annotation-experimental-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_appcompat_appcompat_1_2_0_aar.xml

@@ -0,0 +1,16 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.appcompat:appcompat:1.2.0@aar">
+    <ANNOTATIONS>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/20cb719c6e7f450c785cfe641873baec/appcompat-1.2.0/annotations.zip!/" />
+    </ANNOTATIONS>
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/20cb719c6e7f450c785cfe641873baec/appcompat-1.2.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/20cb719c6e7f450c785cfe641873baec/appcompat-1.2.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/20cb719c6e7f450c785cfe641873baec/appcompat-1.2.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.appcompat/appcompat/1.2.0/13e8ff89631c2e101eb6bddd12c2fb4bbd74b15d/appcompat-1.2.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_appcompat_appcompat_resources_1_2_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.appcompat:appcompat-resources:1.2.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/022e86935ec8da08f293a834c7a9a4dc/jetified-appcompat-resources-1.2.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/022e86935ec8da08f293a834c7a9a4dc/jetified-appcompat-resources-1.2.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/022e86935ec8da08f293a834c7a9a4dc/jetified-appcompat-resources-1.2.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.appcompat/appcompat-resources/1.2.0/9c8b428f65a329eeff4f6abe14a44931b12ef3f2/appcompat-resources-1.2.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_arch_core_core_common_2_1_0.xml

@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.arch.core:core-common:2.1.0">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.arch.core/core-common/2.1.0/b3152fc64428c9354344bd89848ecddc09b6f07e/core-common-2.1.0.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.arch.core/core-common/2.1.0/80ac2d7c8e6400ce2fbc663cd1a7e1cbef38c4b8/core-common-2.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_arch_core_core_runtime_2_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.arch.core:core-runtime:2.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/750b7b3e6ba5087b346f6e90470bbb4c/core-runtime-2.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/750b7b3e6ba5087b346f6e90470bbb4c/core-runtime-2.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/750b7b3e6ba5087b346f6e90470bbb4c/core-runtime-2.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.arch.core/core-runtime/2.0.0/bc41b287c95bc50a3cd27cb1b7cfb301805ba7f1/core-runtime-2.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_cardview_cardview_1_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.cardview:cardview:1.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/204d56b624e751e7990ccfa8a11e8889/cardview-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/204d56b624e751e7990ccfa8a11e8889/cardview-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/204d56b624e751e7990ccfa8a11e8889/cardview-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.cardview/cardview/1.0.0/c9f3ce7ca74ad2c978230f4094ba6804c5166f9c/cardview-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_collection_collection_1_1_0.xml

@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.collection:collection:1.1.0">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.collection/collection/1.1.0/1f27220b47669781457de0d600849a5de0e89909/collection-1.1.0.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.collection/collection/1.1.0/bae67b0019fbb38498198fcc2d0282a340b71c5b/collection-1.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_constraintlayout_constraintlayout_2_0_1_aar.xml

@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.constraintlayout:constraintlayout:2.0.1@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/1d7e9fd91787b67e581a3c9368312805/constraintlayout-2.0.1/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/1d7e9fd91787b67e581a3c9368312805/constraintlayout-2.0.1/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/1d7e9fd91787b67e581a3c9368312805/constraintlayout-2.0.1/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_constraintlayout_constraintlayout_solver_2_0_1.xml

@@ -0,0 +1,9 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.constraintlayout:constraintlayout-solver:2.0.1">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.constraintlayout/constraintlayout-solver/2.0.1/30988fe2d77f3fe3bf7551bb8a8b795fad7e7226/constraintlayout-solver-2.0.1.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES />
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_coordinatorlayout_coordinatorlayout_1_1_0_aar.xml

@@ -0,0 +1,16 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.coordinatorlayout:coordinatorlayout:1.1.0@aar">
+    <ANNOTATIONS>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/0b72cca5aef8e2f071ebd052cd8ee1aa/coordinatorlayout-1.1.0/annotations.zip!/" />
+    </ANNOTATIONS>
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/0b72cca5aef8e2f071ebd052cd8ee1aa/coordinatorlayout-1.1.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/0b72cca5aef8e2f071ebd052cd8ee1aa/coordinatorlayout-1.1.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/0b72cca5aef8e2f071ebd052cd8ee1aa/coordinatorlayout-1.1.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.coordinatorlayout/coordinatorlayout/1.1.0/a15529ac349d76a872ae5ef42b84c320c456cd7f/coordinatorlayout-1.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_core_core_1_3_1_aar.xml

@@ -0,0 +1,16 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.core:core:1.3.1@aar">
+    <ANNOTATIONS>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/fe05db651979b39875ef014855ff51f0/core-1.3.1/annotations.zip!/" />
+    </ANNOTATIONS>
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/fe05db651979b39875ef014855ff51f0/core-1.3.1/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/fe05db651979b39875ef014855ff51f0/core-1.3.1/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/fe05db651979b39875ef014855ff51f0/core-1.3.1/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.core/core/1.3.1/d70edd6d800903a31efea1a28ae531bd91e1a926/core-1.3.1-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_cursoradapter_cursoradapter_1_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.cursoradapter:cursoradapter:1.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/9f5395c9e2c4a1a11a43e64f5d81258c/cursoradapter-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/9f5395c9e2c4a1a11a43e64f5d81258c/cursoradapter-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/9f5395c9e2c4a1a11a43e64f5d81258c/cursoradapter-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.cursoradapter/cursoradapter/1.0.0/1e323083b41c31fd4d45510dfce50614963c3c6c/cursoradapter-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_customview_customview_1_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.customview:customview:1.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/3438716bbde0c4ae93b6b3ca42413f5c/customview-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/3438716bbde0c4ae93b6b3ca42413f5c/customview-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/3438716bbde0c4ae93b6b3ca42413f5c/customview-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.customview/customview/1.0.0/61f6a717d144dff3a6bda413d9abeeb2bca71581/customview-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_drawerlayout_drawerlayout_1_0_0_aar.xml

@@ -0,0 +1,16 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.drawerlayout:drawerlayout:1.0.0@aar">
+    <ANNOTATIONS>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/9bcad8df747e7e541c668492e993a22d/drawerlayout-1.0.0/annotations.zip!/" />
+    </ANNOTATIONS>
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/9bcad8df747e7e541c668492e993a22d/drawerlayout-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/9bcad8df747e7e541c668492e993a22d/drawerlayout-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/9bcad8df747e7e541c668492e993a22d/drawerlayout-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.drawerlayout/drawerlayout/1.0.0/9ecd4ecb7da215ba4c5c3e00bf8d290dad6f2bc5/drawerlayout-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_fragment_fragment_1_1_0_aar.xml

@@ -0,0 +1,16 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.fragment:fragment:1.1.0@aar">
+    <ANNOTATIONS>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/743d2645c3f1bb02b7a57f08f911970e/fragment-1.1.0/annotations.zip!/" />
+    </ANNOTATIONS>
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/743d2645c3f1bb02b7a57f08f911970e/fragment-1.1.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/743d2645c3f1bb02b7a57f08f911970e/fragment-1.1.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/743d2645c3f1bb02b7a57f08f911970e/fragment-1.1.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.fragment/fragment/1.1.0/b9ebb04df2cb0cad4419af3c658690bc82aa5706/fragment-1.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_interpolator_interpolator_1_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.interpolator:interpolator:1.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/a81ff3a6f4fe4cdba627ce49c2369465/interpolator-1.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/a81ff3a6f4fe4cdba627ce49c2369465/interpolator-1.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/a81ff3a6f4fe4cdba627ce49c2369465/interpolator-1.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.interpolator/interpolator/1.0.0/fefd5e3cbc479b6b4a9532d05688a1e659e8d3d2/interpolator-1.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_lifecycle_lifecycle_common_2_1_0.xml

@@ -0,0 +1,11 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.lifecycle:lifecycle-common:2.1.0">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-common/2.1.0/c67e7807d9cd6c329b9d0218b2ec4e505dd340b7/lifecycle-common-2.1.0.jar!/" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-common/2.1.0/ff1470ebad448355d3722c637c85d5174b584f38/lifecycle-common-2.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_lifecycle_lifecycle_livedata_2_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.lifecycle:lifecycle-livedata:2.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/e3a7d3b723deff8b2b903c0665652c62/lifecycle-livedata-2.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/e3a7d3b723deff8b2b903c0665652c62/lifecycle-livedata-2.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/e3a7d3b723deff8b2b903c0665652c62/lifecycle-livedata-2.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-livedata/2.0.0/740ce61935bd789380c01178bd8ce402402ebd2f/lifecycle-livedata-2.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_lifecycle_lifecycle_livedata_core_2_0_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.lifecycle:lifecycle-livedata-core:2.0.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/c9ce6976a0ee114a7df6a78a9d188526/lifecycle-livedata-core-2.0.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/c9ce6976a0ee114a7df6a78a9d188526/lifecycle-livedata-core-2.0.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/c9ce6976a0ee114a7df6a78a9d188526/lifecycle-livedata-core-2.0.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-livedata-core/2.0.0/c158207594782b42f3a2e08a5a029eb3319e4404/lifecycle-livedata-core-2.0.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_lifecycle_lifecycle_runtime_2_1_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.lifecycle:lifecycle-runtime:2.1.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/8649d60e3e3b1c6cd478587450b96639/lifecycle-runtime-2.1.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/8649d60e3e3b1c6cd478587450b96639/lifecycle-runtime-2.1.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/8649d60e3e3b1c6cd478587450b96639/lifecycle-runtime-2.1.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-runtime/2.1.0/533a0cd1a095abbdfd08a49c4d34bd0713977034/lifecycle-runtime-2.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

src/Xiaominotes/.idea/libraries/Gradle__androidx_lifecycle_lifecycle_viewmodel_2_1_0_aar.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Gradle: androidx.lifecycle:lifecycle-viewmodel:2.1.0@aar">
+    <CLASSES>
+      <root url="jar://E:/Android_SDK/caches/transforms-2/files-2.1/793aeea327d8b0368ff5df157d748988/lifecycle-viewmodel-2.1.0/jars/classes.jar!/" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/793aeea327d8b0368ff5df157d748988/lifecycle-viewmodel-2.1.0/res" />
+      <root url="file://E:/Android_SDK/caches/transforms-2/files-2.1/793aeea327d8b0368ff5df157d748988/lifecycle-viewmodel-2.1.0/AndroidManifest.xml" />
+    </CLASSES>
+    <JAVADOC />
+    <SOURCES>
+      <root url="jar://E:/Android_SDK/caches/modules-2/files-2.1/androidx.lifecycle/lifecycle-viewmodel/2.1.0/bfd86b9887c2343516f82bed91acbab34a45841d/lifecycle-viewmodel-2.1.0-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>