添加注释

MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java

@@ -0,0 +1,416 @@
+/*
+ * 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;
+
+/**
+ * 该类提供了将笔记数据备份为文本文件的功能。
+ */
+public class BackupUtils {
+    private static final String TAG = "BackupUtils";
+    // 单例模式实例
+    private static BackupUtils sInstance;
+
+    /**
+     * 获取BackupUtils的单例实例。
+     *
+     * @param context 应用上下文
+     * @return BackupUtils的单例实例
+     */
+    public static synchronized BackupUtils getInstance(Context context) {
+        if (sInstance == null) {
+            sInstance = new BackupUtils(context);
+        }
+        return sInstance;
+    }
+
+    /**
+     * 以下状态常量用于表示备份或恢复操作的状态。
+     */
+    // 当前SD卡未挂载
+    public static final int STATE_SD_CARD_UNMOUONTED = 0;
+    // 备份文件不存在
+    public static final int STATE_BACKUP_FILE_NOT_EXIST = 1;
+    // 数据格式不正确，可能被其他程序修改
+    public static final int STATE_DATA_DESTROIED = 2;
+    // 运行时异常导致备份或恢复失败
+    public static final int STATE_SYSTEM_ERROR = 3;
+    // 备份或恢复成功
+    public static final int STATE_SUCCESS = 4;
+
+    private TextExport mTextExport;
+
+    /**
+     * 构造函数，初始化TextExport对象。
+     *
+     * @param context 应用上下文
+     */
+    private BackupUtils(Context context) {
+        mTextExport = new TextExport(context);
+    }
+
+    /**
+     * 检查外部存储是否可用。
+     *
+     * @return 如果外部存储已挂载返回true，否则返回false
+     */
+    private static boolean externalStorageAvailable() {
+        return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
+    }
+
+    /**
+     * 将笔记数据导出为文本文件。
+     *
+     * @return 导出操作的状态码
+     */
+    public int exportToText() {
+        return mTextExport.exportToText();
+    }
+
+    /**
+     * 获取导出的文本文件的名称。
+     *
+     * @return 导出的文本文件的名称
+     */
+    public String getExportedTextFileName() {
+        return mTextExport.mFileName;
+    }
+
+    /**
+     * 获取导出的文本文件的目录。
+     *
+     * @return 导出的文本文件的目录
+     */
+    public String getExportedTextFileDir() {
+        return mTextExport.mFileDirectory;
+    }
+
+    /**
+     * 内部类，负责将笔记数据导出为文本文件。
+     */
+    private static class TextExport {
+        // 用于查询笔记的投影列
+        private static final String[] NOTE_PROJECTION = {
+                NoteColumns.ID,
+                NoteColumns.MODIFIED_DATE,
+                NoteColumns.SNIPPET,
+                NoteColumns.TYPE
+        };
+
+        // 笔记ID列的索引
+        private static final int NOTE_COLUMN_ID = 0;
+
+        // 笔记修改日期列的索引
+        private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
+
+        // 笔记摘要列的索引
+        private static final int NOTE_COLUMN_SNIPPET = 2;
+
+        // 用于查询笔记数据的投影列
+        private static final String[] DATA_PROJECTION = {
+                DataColumns.CONTENT,
+                DataColumns.MIME_TYPE,
+                DataColumns.DATA1,
+                DataColumns.DATA2,
+                DataColumns.DATA3,
+                DataColumns.DATA4,
+        };
+
+        // 笔记数据内容列的索引
+        private static final int DATA_COLUMN_CONTENT = 0;
+
+        // 笔记数据MIME类型列的索引
+        private static final int DATA_COLUMN_MIME_TYPE = 1;
+
+        // 通话记录日期列的索引
+        private static final int DATA_COLUMN_CALL_DATE = 2;
+
+        // 电话号码列的索引
+        private static final int DATA_COLUMN_PHONE_NUMBER = 4;
+
+        // 文本导出格式数组
+        private final String[] TEXT_FORMAT;
+        // 文件夹名称格式索引
+        private static final int FORMAT_FOLDER_NAME = 0;
+        // 笔记日期格式索引
+        private static final int FORMAT_NOTE_DATE = 1;
+        // 笔记内容格式索引
+        private static final int FORMAT_NOTE_CONTENT = 2;
+
+        private Context mContext;
+        private String mFileName;
+        private String mFileDirectory;
+
+        /**
+         * 构造函数，初始化文本导出所需的资源。
+         *
+         * @param context 应用上下文
+         */
+        public TextExport(Context context) {
+            TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
+            mContext = context;
+            mFileName = "";
+            mFileDirectory = "";
+        }
+
+        /**
+         * 获取指定索引的文本格式。
+         *
+         * @param id 格式索引
+         * @return 对应的文本格式
+         */
+        private String getFormat(int id) {
+            return TEXT_FORMAT[id];
+        }
+
+        /**
+         * 将指定文件夹下的笔记导出为文本。
+         *
+         * @param folderId 文件夹ID
+         * @param ps       打印流
+         */
+        private void exportFolderToText(String folderId, PrintStream ps) {
+            // 查询属于该文件夹的笔记
+            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 {
+                        // 打印笔记的最后修改日期
+                        ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
+                                mContext.getString(R.string.format_datetime_mdhm),
+                                notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
+                        // 查询属于该笔记的数据
+                        String noteId = notesCursor.getString(NOTE_COLUMN_ID);
+                        exportNoteToText(noteId, ps);
+                    } while (notesCursor.moveToNext());
+                }
+                notesCursor.close();
+            }
+        }
+
+        /**
+         * 将指定笔记导出为文本。
+         *
+         * @param noteId 笔记ID
+         * @param ps     打印流
+         */
+        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)) {
+                            // 打印电话号码
+                            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));
+                            }
+                            // 打印通话日期
+                            ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
+                                    .format(mContext.getString(R.string.format_datetime_mdhm),
+                                            callDate)));
+                            // 打印通话附件位置
+                            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();
+            }
+            // 在笔记之间打印换行符
+            try {
+                ps.write(new byte[]{
+                        Character.LINE_SEPARATOR, Character.LETTER_NUMBER
+                });
+            } catch (IOException e) {
+                Log.e(TAG, e.toString());
+            }
+        }
+
+        /**
+         * 将笔记数据导出为用户可读的文本文件。
+         *
+         * @return 导出操作的状态码
+         */
+        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;
+            }
+            // 首先导出文件夹及其笔记
+            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 {
+                        // 打印文件夹名称
+                        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();
+            }
+
+            // 导出根文件夹下的笔记
+            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))));
+                        // 查询属于该笔记的数据
+                        String noteId = noteCursor.getString(NOTE_COLUMN_ID);
+                        exportNoteToText(noteId, ps);
+                    } while (noteCursor.moveToNext());
+                }
+                noteCursor.close();
+            }
+            ps.close();
+
+            return STATE_SUCCESS;
+        }
+
+        /**
+         * 获取指向导出文本文件的打印流。
+         *
+         * @return 打印流，如果获取失败返回null
+         */
+        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;
+        }
+    }
+
+    /**
+     * 生成用于存储导入数据的文本文件。
+     *
+     * @param context          应用上下文
+     * @param filePathResId    文件路径资源ID
+     * @param fileNameFormatResId 文件名格式资源ID
+     * @return 生成的文件，如果生成失败返回null
+     */
+    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;
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java

@@ -0,0 +1,389 @@
+/*
+ * 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;
+
+/**
+ * 该类提供了与笔记数据操作相关的工具方法，包括批量删除、移动笔记等。
+ */
+public class DataUtils {
+    public static final String TAG = "DataUtils";
+
+    /**
+     * 批量删除笔记。
+     *
+     * @param resolver 内容解析器
+     * @param ids      要删除的笔记ID集合
+     * @return 如果删除成功返回true，否则返回false
+     */
+    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;
+        }
+
+        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;
+            }
+            ContentProviderOperation.Builder builder = ContentProviderOperation
+                   .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+            operationList.add(builder.build());
+        }
+        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;
+    }
+
+    /**
+     * 将笔记移动到指定文件夹。
+     *
+     * @param resolver    内容解析器
+     * @param id          笔记ID
+     * @param srcFolderId 源文件夹ID
+     * @param desFolderId 目标文件夹ID
+     */
+    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);
+    }
+
+    /**
+     * 批量将笔记移动到指定文件夹。
+     *
+     * @param resolver 内容解析器
+     * @param ids      要移动的笔记ID集合
+     * @param folderId 目标文件夹ID
+     * @return 如果移动成功返回true，否则返回false
+     */
+    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());
+        }
+
+        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;
+    }
+
+    /**
+     * 获取用户文件夹的数量（不包括系统文件夹）。
+     *
+     * @param resolver 内容解析器
+     * @return 用户文件夹的数量
+     */
+    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);
+
+        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;
+    }
+
+    /**
+     * 检查笔记是否在数据库中可见。
+     *
+     * @param resolver 内容解析器
+     * @param noteId   笔记ID
+     * @param type     笔记类型
+     * @return 如果笔记可见返回true，否则返回false
+     */
+    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);
+
+        boolean exist = false;
+        if (cursor != null) {
+            if (cursor.getCount() > 0) {
+                exist = true;
+            }
+            cursor.close();
+        }
+        return exist;
+    }
+
+    /**
+     * 检查笔记是否存在于数据库中。
+     *
+     * @param resolver 内容解析器
+     * @param noteId   笔记ID
+     * @return 如果笔记存在返回true，否则返回false
+     */
+    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;
+    }
+
+    /**
+     * 检查数据是否存在于数据库中。
+     *
+     * @param resolver 内容解析器
+     * @param dataId   数据ID
+     * @return 如果数据存在返回true，否则返回false
+     */
+    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;
+    }
+
+    /**
+     * 检查可见文件夹名称是否已存在。
+     *
+     * @param resolver 内容解析器
+     * @param name     文件夹名称
+     * @return 如果文件夹名称已存在返回true，否则返回false
+     */
+    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;
+    }
+
+    /**
+     * 获取指定文件夹下的笔记小部件属性集合。
+     *
+     * @param resolver 内容解析器
+     * @param folderId 文件夹ID
+     * @return 笔记小部件属性集合
+     */
+    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);
+
+        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;
+    }
+
+    /**
+     * 根据笔记ID获取通话号码。
+     *
+     * @param resolver 内容解析器
+     * @param noteId   笔记ID
+     * @return 通话号码，如果未找到返回空字符串
+     */
+    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},
+                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 "";
+    }
+
+    /**
+     * 根据电话号码和通话日期获取笔记ID。
+     *
+     * @param resolver  内容解析器
+     * @param phoneNumber 电话号码
+     * @param callDate  通话日期
+     * @return 笔记ID，如果未找到返回0
+     */
+    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;
+    }
+
+    /**
+     * 根据笔记ID获取笔记摘要。
+     *
+     * @param resolver 内容解析器
+     * @param noteId   笔记ID
+     * @return 笔记摘要
+     * @throws IllegalArgumentException 如果未找到笔记
+     */
+    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);
+    }
+
+    /**
+     * 格式化笔记摘要，去除首尾空格并截取第一行。
+     *
+     * @param snippet 笔记摘要
+     * @return 格式化后的笔记摘要
+     */
+    public static String getFormattedSnippet(String snippet) {
+        if (snippet != null) {
+            snippet = snippet.trim();
+            int index = snippet.indexOf('\n');
+            if (index != -1) {
+                snippet = snippet.substring(0, index);
+            }
+        }
+        return snippet;
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/tool/GTaskStringUtils.java

@@ -0,0 +1,161 @@
+/*
+ * 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;
+
+/**
+ * 该类包含与Google任务（GTask）相关的JSON字符串常量，用于在应用中处理GTask的JSON数据。
+ */
+public class GTaskStringUtils {
+
+    // 定义GTask JSON数据中的动作ID字段
+    public final static String GTASK_JSON_ACTION_ID = "action_id";
+
+    // 定义GTask JSON数据中的动作列表字段
+    public final static String GTASK_JSON_ACTION_LIST = "action_list";
+
+    // 定义GTask JSON数据中的动作类型字段
+    public final static String GTASK_JSON_ACTION_TYPE = "action_type";
+
+    // 定义GTask JSON数据中的创建动作类型
+    public final static String GTASK_JSON_ACTION_TYPE_CREATE = "create";
+
+    // 定义GTask JSON数据中的获取所有动作类型
+    public final static String GTASK_JSON_ACTION_TYPE_GETALL = "get_all";
+
+    // 定义GTask JSON数据中的移动动作类型
+    public final static String GTASK_JSON_ACTION_TYPE_MOVE = "move";
+
+    // 定义GTask JSON数据中的更新动作类型
+    public final static String GTASK_JSON_ACTION_TYPE_UPDATE = "update";
+
+    // 定义GTask JSON数据中的创建者ID字段
+    public final static String GTASK_JSON_CREATOR_ID = "creator_id";
+
+    // 定义GTask JSON数据中的子实体字段
+    public final static String GTASK_JSON_CHILD_ENTITY = "child_entity";
+
+    // 定义GTask JSON数据中的客户端版本字段
+    public final static String GTASK_JSON_CLIENT_VERSION = "client_version";
+
+    // 定义GTask JSON数据中的完成状态字段
+    public final static String GTASK_JSON_COMPLETED = "completed";
+
+    // 定义GTask JSON数据中的当前列表ID字段
+    public final static String GTASK_JSON_CURRENT_LIST_ID = "current_list_id";
+
+    // 定义GTask JSON数据中的默认列表ID字段
+    public final static String GTASK_JSON_DEFAULT_LIST_ID = "default_list_id";
+
+    // 定义GTask JSON数据中的删除状态字段
+    public final static String GTASK_JSON_DELETED = "deleted";
+
+    // 定义GTask JSON数据中的目标列表字段
+    public final static String GTASK_JSON_DEST_LIST = "dest_list";
+
+    // 定义GTask JSON数据中的目标父级字段
+    public final static String GTASK_JSON_DEST_PARENT = "dest_parent";
+
+    // 定义GTask JSON数据中的目标父级类型字段
+    public final static String GTASK_JSON_DEST_PARENT_TYPE = "dest_parent_type";
+
+    // 定义GTask JSON数据中的实体增量字段
+    public final static String GTASK_JSON_ENTITY_DELTA = "entity_delta";
+
+    // 定义GTask JSON数据中的实体类型字段
+    public final static String GTASK_JSON_ENTITY_TYPE = "entity_type";
+
+    // 定义GTask JSON数据中的获取已删除项字段
+    public final static String GTASK_JSON_GET_DELETED = "get_deleted";
+
+    // 定义GTask JSON数据中的ID字段
+    public final static String GTASK_JSON_ID = "id";
+
+    // 定义GTask JSON数据中的索引字段
+    public final static String GTASK_JSON_INDEX = "index";
+
+    // 定义GTask JSON数据中的最后修改时间字段
+    public final static String GTASK_JSON_LAST_MODIFIED = "last_modified";
+
+    // 定义GTask JSON数据中的最新同步点字段
+    public final static String GTASK_JSON_LATEST_SYNC_POINT = "latest_sync_point";
+
+    // 定义GTask JSON数据中的列表ID字段
+    public final static String GTASK_JSON_LIST_ID = "list_id";
+
+    // 定义GTask JSON数据中的列表集合字段
+    public final static String GTASK_JSON_LISTS = "lists";
+
+    // 定义GTask JSON数据中的名称字段
+    public final static String GTASK_JSON_NAME = "name";
+
+    // 定义GTask JSON数据中的新ID字段
+    public final static String GTASK_JSON_NEW_ID = "new_id";
+
+    // 定义GTask JSON数据中的备注字段
+    public final static String GTASK_JSON_NOTES = "notes";
+
+    // 定义GTask JSON数据中的父级ID字段
+    public final static String GTASK_JSON_PARENT_ID = "parent_id";
+
+    // 定义GTask JSON数据中的前一个兄弟ID字段
+    public final static String GTASK_JSON_PRIOR_SIBLING_ID = "prior_sibling_id";
+
+    // 定义GTask JSON数据中的结果字段
+    public final static String GTASK_JSON_RESULTS = "results";
+
+    // 定义GTask JSON数据中的源列表字段
+    public final static String GTASK_JSON_SOURCE_LIST = "source_list";
+
+    // 定义GTask JSON数据中的任务集合字段
+    public final static String GTASK_JSON_TASKS = "tasks";
+
+    // 定义GTask JSON数据中的类型字段
+    public final static String GTASK_JSON_TYPE = "type";
+
+    // 定义GTask JSON数据中的组类型
+    public final static String GTASK_JSON_TYPE_GROUP = "GROUP";
+
+    // 定义GTask JSON数据中的任务类型
+    public final static String GTASK_JSON_TYPE_TASK = "TASK";
+
+    // 定义GTask JSON数据中的用户字段
+    public final static String GTASK_JSON_USER = "user";
+
+    // 定义MIUI文件夹前缀
+    public final static String MIUI_FOLDER_PREFFIX = "[MIUI_Notes]";
+
+    // 定义默认文件夹名称
+    public final static String FOLDER_DEFAULT = "Default";
+
+    // 定义通话记录文件夹名称
+    public final static String FOLDER_CALL_NOTE = "Call_Note";
+
+    // 定义元数据文件夹名称
+    public final static String FOLDER_META = "METADATA";
+
+    // 定义元数据头中的GTask ID字段
+    public final static String META_HEAD_GTASK_ID = "meta_gid";
+
+    // 定义元数据头中的备注字段
+    public final static String META_HEAD_NOTE = "meta_note";
+
+    // 定义元数据头中的数据字段
+    public final static String META_HEAD_DATA = "meta_data";
+
+    // 定义元数据备注名称
+    public final static String META_NOTE_NAME = "[META INFO] DON'T UPDATE AND DELETE";
+}

MiNotes-master/app/src/main/java/net/micode/notes/tool/ResourceParser.java

@@ -0,0 +1,286 @@
+/*
+ * 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.preference.PreferenceManager;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.NotesPreferenceActivity;
+
+/**
+ * 该类用于解析应用中的资源，包括背景颜色、字体大小等。
+ */
+public class ResourceParser {
+
+    // 定义黄色背景颜色的常量
+    public static final int YELLOW = 0;
+    // 定义蓝色背景颜色的常量
+    public static final int BLUE = 1;
+    // 定义白色背景颜色的常量
+    public static final int WHITE = 2;
+    // 定义绿色背景颜色的常量
+    public static final int GREEN = 3;
+    // 定义红色背景颜色的常量
+    public static final int RED = 4;
+
+    // 定义默认背景颜色为黄色
+    public static final int BG_DEFAULT_COLOR = YELLOW;
+
+    // 定义小字体大小的常量
+    public static final int TEXT_SMALL = 0;
+    // 定义中等字体大小的常量
+    public static final int TEXT_MEDIUM = 1;
+    // 定义大字体大小的常量
+    public static final int TEXT_LARGE = 2;
+    // 定义超大字体大小的常量
+    public static final int TEXT_SUPER = 3;
+
+    // 定义默认字体大小为中等
+    public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;
+
+    /**
+     * 内部类，用于管理笔记编辑界面的背景资源。
+     */
+    public static class NoteBgResources {
+        // 笔记编辑背景资源数组
+        private final static int[] BG_EDIT_RESOURCES = new int[]{
+                R.drawable.edit_yellow,
+                R.drawable.edit_blue,
+                R.drawable.edit_white,
+                R.drawable.edit_green,
+                R.drawable.edit_red
+        };
+
+        // 笔记编辑标题背景资源数组
+        private final static int[] BG_EDIT_TITLE_RESOURCES = new int[]{
+                R.drawable.edit_title_yellow,
+                R.drawable.edit_title_blue,
+                R.drawable.edit_title_white,
+                R.drawable.edit_title_green,
+                R.drawable.edit_title_red
+        };
+
+        /**
+         * 根据ID获取笔记编辑背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getNoteBgResource(int id) {
+            return BG_EDIT_RESOURCES[id];
+        }
+
+        /**
+         * 根据ID获取笔记编辑标题背景资源。
+         *
+         * @param id 标题背景资源ID
+         * @return 对应的标题背景资源ID
+         */
+        public static int getNoteTitleBgResource(int id) {
+            return BG_EDIT_TITLE_RESOURCES[id];
+        }
+    }
+
+    /**
+     * 获取默认的背景ID。
+     *
+     * @param context 应用上下文
+     * @return 默认的背景ID
+     */
+    public static int getDefaultBgId(Context context) {
+        if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
+                NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
+            return (int) (Math.random() * NoteBgResources.BG_EDIT_RESOURCES.length);
+        } else {
+            return BG_DEFAULT_COLOR;
+        }
+    }
+
+    /**
+     * 内部类，用于管理笔记列表项的背景资源。
+     */
+    public static class NoteItemBgResources {
+        // 笔记列表第一项背景资源数组
+        private final static int[] BG_FIRST_RESOURCES = new int[]{
+                R.drawable.list_yellow_up,
+                R.drawable.list_blue_up,
+                R.drawable.list_white_up,
+                R.drawable.list_green_up,
+                R.drawable.list_red_up
+        };
+
+        // 笔记列表中间项背景资源数组
+        private final static int[] BG_NORMAL_RESOURCES = new int[]{
+                R.drawable.list_yellow_middle,
+                R.drawable.list_blue_middle,
+                R.drawable.list_white_middle,
+                R.drawable.list_green_middle,
+                R.drawable.list_red_middle
+        };
+
+        // 笔记列表最后一项背景资源数组
+        private final static int[] BG_LAST_RESOURCES = new int[]{
+                R.drawable.list_yellow_down,
+                R.drawable.list_blue_down,
+                R.drawable.list_white_down,
+                R.drawable.list_green_down,
+                R.drawable.list_red_down,
+        };
+
+        // 笔记列表单项背景资源数组
+        private final static int[] BG_SINGLE_RESOURCES = new int[]{
+                R.drawable.list_yellow_single,
+                R.drawable.list_blue_single,
+                R.drawable.list_white_single,
+                R.drawable.list_green_single,
+                R.drawable.list_red_single
+        };
+
+        /**
+         * 根据ID获取笔记列表第一项背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getNoteBgFirstRes(int id) {
+            return BG_FIRST_RESOURCES[id];
+        }
+
+        /**
+         * 根据ID获取笔记列表最后一项背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getNoteBgLastRes(int id) {
+            return BG_LAST_RESOURCES[id];
+        }
+
+        /**
+         * 根据ID获取笔记列表单项背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getNoteBgSingleRes(int id) {
+            return BG_SINGLE_RESOURCES[id];
+        }
+
+        /**
+         * 根据ID获取笔记列表中间项背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getNoteBgNormalRes(int id) {
+            return BG_NORMAL_RESOURCES[id];
+        }
+
+        /**
+         * 获取文件夹背景资源。
+         *
+         * @return 文件夹背景资源ID
+         */
+        public static int getFolderBgRes() {
+            return R.drawable.list_folder;
+        }
+    }
+
+    /**
+     * 内部类，用于管理小部件的背景资源。
+     */
+    public static class WidgetBgResources {
+        // 2x小部件背景资源数组
+        private final static int[] BG_2X_RESOURCES = new int[]{
+                R.drawable.widget_2x_yellow,
+                R.drawable.widget_2x_blue,
+                R.drawable.widget_2x_white,
+                R.drawable.widget_2x_green,
+                R.drawable.widget_2x_red,
+        };
+
+        /**
+         * 根据ID获取2x小部件背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getWidget2xBgResource(int id) {
+            return BG_2X_RESOURCES[id];
+        }
+
+        // 4x小部件背景资源数组
+        private final static int[] BG_4X_RESOURCES = new int[]{
+                R.drawable.widget_4x_yellow,
+                R.drawable.widget_4x_blue,
+                R.drawable.widget_4x_white,
+                R.drawable.widget_4x_green,
+                R.drawable.widget_4x_red
+        };
+
+        /**
+         * 根据ID获取4x小部件背景资源。
+         *
+         * @param id 背景资源ID
+         * @return 对应的背景资源ID
+         */
+        public static int getWidget4xBgResource(int id) {
+            return BG_4X_RESOURCES[id];
+        }
+    }
+
+    /**
+     * 内部类，用于管理文本外观资源。
+     */
+    public static class TextAppearanceResources {
+        // 文本外观资源数组
+        private final static int[] TEXTAPPEARANCE_RESOURCES = new int[]{
+                R.style.TextAppearanceNormal,
+                R.style.TextAppearanceMedium,
+                R.style.TextAppearanceLarge,
+                R.style.TextAppearanceSuper
+        };
+
+        /**
+         * 根据ID获取文本外观资源。
+         * 如果ID超出资源数组长度，返回默认字体大小对应的资源。
+         *
+         * @param id 文本外观资源ID
+         * @return 对应的文本外观资源ID
+         */
+        public static int getTexAppearanceResource(int id) {
+            /**
+             * HACKME: 修复将资源ID存储在共享偏好中的错误。
+             * 如果ID大于资源数组的长度，返回默认字体大小对应的资源。
+             */
+            if (id >= TEXTAPPEARANCE_RESOURCES.length) {
+                return BG_DEFAULT_FONT_SIZE;
+            }
+            return TEXTAPPEARANCE_RESOURCES[id];
+        }
+
+        /**
+         * 获取文本外观资源数组的长度。
+         *
+         * @return 文本外观资源数组的长度
+         */
+        public static int getResourcesSize() {
+            return TEXTAPPEARANCE_RESOURCES.length;
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java

@@ -0,0 +1,166 @@
+/*
+ * 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.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.DialogInterface.OnDismissListener;
+import android.content.Intent;
+import android.media.AudioManager;
+import android.media.MediaPlayer;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.PowerManager;
+import android.provider.Settings;
+import android.view.Window;
+import android.view.WindowManager;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.DataUtils;
+
+import java.io.IOException;
+
+
+/**
+ * 闹钟提醒活动，当闹钟触发时显示的界面
+ */
+public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
+    private long mNoteId; // 关联的笔记ID
+    private String mSnippet; // 笔记内容片段
+    private static final int SNIPPET_PREW_MAX_LEN = 60; // 预览文本最大长度
+    MediaPlayer mPlayer; // 媒体播放器用于播放闹铃
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        requestWindowFeature(Window.FEATURE_NO_TITLE); // 无标题栏
+        
+        // 设置窗口属性，在锁屏时也能显示
+        final Window win = getWindow();
+        win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
+
+        // 如果屏幕关闭，则唤醒屏幕
+        if (!isScreenOn()) {
+            win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+                    | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
+        }
+
+        // 从Intent获取笔记数据
+        Intent intent = getIntent();
+        try {
+            mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
+            mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            // 截取过长文本
+            mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
+                    SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
+                    : mSnippet;
+        } catch (IllegalArgumentException e) {
+            e.printStackTrace();
+            return;
+        }
+
+        mPlayer = new MediaPlayer();
+        // 检查笔记是否仍然存在
+        if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
+            showActionDialog(); // 显示操作对话框
+            playAlarmSound(); // 播放闹铃声音
+        } else {
+            finish(); // 笔记不存在则结束活动
+        }
+    }
+
+    // 检查屏幕是否亮着
+    private boolean isScreenOn() {
+        PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
+        return pm.isScreenOn();
+    }
+
+    // 播放闹铃声音
+    private void playAlarmSound() {
+        // 获取默认闹铃铃声
+        Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
+
+        // 检查静音模式设置
+        int silentModeStreams = Settings.System.getInt(getContentResolver(),
+                Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
+
+        // 设置音频流类型
+        if ((silentModeStreams & (1 << AudioManager.STREAM_ALARM)) != 0) {
+            mPlayer.setAudioStreamType(silentModeStreams);
+        } else {
+            mPlayer.setAudioStreamType(AudioManager.STREAM_ALARM);
+        }
+        
+        // 准备并播放声音
+        try {
+            mPlayer.setDataSource(this, url);
+            mPlayer.prepare();
+            mPlayer.setLooping(true); // 循环播放
+            mPlayer.start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    // 显示操作对话框
+    private void showActionDialog() {
+        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        dialog.setTitle(R.string.app_name);
+        dialog.setMessage(mSnippet);
+        dialog.setPositiveButton(R.string.notealert_ok, this);
+        if (isScreenOn()) {
+            dialog.setNegativeButton(R.string.notealert_enter, this);
+        }
+        dialog.show().setOnDismissListener(this);
+    }
+
+    // 对话框按钮点击事件
+    public void onClick(DialogInterface dialog, int which) {
+        switch (which) {
+            case DialogInterface.BUTTON_NEGATIVE: // 进入笔记
+                Intent intent = new Intent(this, NoteEditActivity.class);
+                intent.setAction(Intent.ACTION_VIEW);
+                intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                startActivity(intent);
+                break;
+            default:
+                break;
+        }
+    }
+
+    // 对话框关闭事件
+    public void onDismiss(DialogInterface dialog) {
+        stopAlarmSound(); // 停止闹铃
+        finish(); // 结束活动
+    }
+
+    // 停止闹铃声音
+    private void stopAlarmSound() {
+        if (mPlayer != null) {
+            mPlayer.stop();
+            mPlayer.release();
+            mPlayer = null;
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/AlarmInitReceiver.java

@@ -0,0 +1,71 @@
+/*
+ * 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.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.BroadcastReceiver;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+
+/**
+ * 初始化闹钟的广播接收器，通常在设备启动后运行
+ */
+public class AlarmInitReceiver extends BroadcastReceiver {
+    // 查询笔记的投影(需要哪些列)
+    private static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,
+        NoteColumns.ALERTED_DATE
+    };
+
+    private static final int COLUMN_ID = 0; // ID列索引
+    private static final int COLUMN_ALERTED_DATE = 1; // 提醒日期列索引
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        long currentDate = System.currentTimeMillis();
+        // 查询所有设置了未来提醒的笔记
+        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                PROJECTION,
+                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
+                new String[] { String.valueOf(currentDate) },
+                null);
+
+        if (c != null) {
+            if (c.moveToFirst()) {
+                do {
+                    long alertDate = c.getLong(COLUMN_ALERTED_DATE);
+                    // 为每个笔记创建闹钟
+                    Intent sender = new Intent(context, AlarmReceiver.class);
+                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, 
+                            c.getLong(COLUMN_ID)));
+                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, 0);
+                    AlarmManager alermManager = (AlarmManager) context
+                            .getSystemService(Context.ALARM_SERVICE);
+                    alermManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);
+                } while (c.moveToNext());
+            }
+            c.close();
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/AlarmReceiver.java

@@ -0,0 +1,34 @@
+/*
+ * 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.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+/**
+ * 闹钟触发时接收广播并启动闹钟提醒活动
+ */
+public class AlarmReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        // 启动闹钟提醒活动
+        intent.setClass(context, AlarmAlertActivity.class);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        context.startActivity(intent);
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/DateTimePicker.java

@@ -0,0 +1,504 @@
+/*
+ * 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 java.text.DateFormatSymbols;
+import java.util.Calendar;
+
+import net.micode.notes.R;
+
+import android.content.Context;
+import android.text.format.DateFormat;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.NumberPicker;
+
+/**
+ * DateTimePicker类继承自FrameLayout，用于创建一个日期和时间选择器，
+ * 允许用户通过滚动选择日期和时间，并提供了日期和时间变化的回调接口。
+ */
+public class DateTimePicker extends FrameLayout {
+
+    // 默认启用状态
+    private static final boolean DEFAULT_ENABLE_STATE = true;
+    // 半天的小时数
+    private static final int HOURS_IN_HALF_DAY = 12;
+    // 一天的小时数
+    private static final int HOURS_IN_ALL_DAY = 24;
+    // 一周的天数
+    private static final int DAYS_IN_ALL_WEEK = 7;
+    // 日期选择器的最小取值
+    private static final int DATE_SPINNER_MIN_VAL = 0;
+    // 日期选择器的最大取值
+    private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1;
+    // 24小时制小时选择器的最小取值
+    private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0;
+    // 24小时制小时选择器的最大取值
+    private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23;
+    // 12小时制小时选择器的最小取值
+    private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1;
+    // 12小时制小时选择器的最大取值
+    private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12;
+    // 分钟选择器的最小取值
+    private static final int MINUT_SPINNER_MIN_VAL = 0;
+    // 分钟选择器的最大取值
+    private static final int MINUT_SPINNER_MAX_VAL = 59;
+    // 上午/下午选择器的最小取值
+    private static final int AMPM_SPINNER_MIN_VAL = 0;
+    // 上午/下午选择器的最大取值
+    private static final int AMPM_SPINNER_MAX_VAL = 1;
+
+    // 日期选择器
+    private final NumberPicker mDateSpinner;
+    // 小时选择器
+    private final NumberPicker mHourSpinner;
+    // 分钟选择器
+    private final NumberPicker mMinuteSpinner;
+    // 上午/下午选择器
+    private final NumberPicker mAmPmSpinner;
+    // 日历对象，用于存储当前日期和时间
+    private Calendar mDate;
+
+    // 日期显示值数组
+    private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
+
+    // 是否为上午
+    private boolean mIsAm;
+    // 是否为24小时制
+    private boolean mIs24HourView;
+    // 是否启用
+    private boolean mIsEnabled = DEFAULT_ENABLE_STATE;
+    // 是否正在初始化
+    private boolean mInitialising;
+    // 日期和时间变化监听器
+    private OnDateTimeChangedListener mOnDateTimeChangedListener;
+
+    /**
+     * 日期选择器值变化监听器，当日期选择器的值发生变化时调用
+     */
+    private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            // 根据新值和旧值的差值更新日期
+            mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal);
+            // 更新日期选择器的显示
+            updateDateControl();
+            // 调用日期和时间变化的回调方法
+            onDateTimeChanged();
+        }
+    };
+
+    /**
+     * 小时选择器值变化监听器，当小时选择器的值发生变化时调用
+     */
+    private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            boolean isDateChanged = false;
+            // 创建一个新的日历对象
+            Calendar cal = Calendar.getInstance();
+            if (!mIs24HourView) {
+                if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
+                    // 从下午11点到凌晨12点，日期加1
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, 1);
+                    isDateChanged = true;
+                } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
+                    // 从凌晨12点到上午11点，日期减1
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, -1);
+                    isDateChanged = true;
+                }
+                if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
+                        oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
+                    // 切换上午/下午状态
+                    mIsAm = !mIsAm;
+                    // 更新上午/下午选择器的显示
+                    updateAmPmControl();
+                }
+            } else {
+                if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
+                    // 从23点到0点，日期加1
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, 1);
+                    isDateChanged = true;
+                } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
+                    // 从0点到23点，日期减1
+                    cal.setTimeInMillis(mDate.getTimeInMillis());
+                    cal.add(Calendar.DAY_OF_YEAR, -1);
+                    isDateChanged = true;
+                }
+            }
+            // 计算新的小时数
+            int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
+            // 设置日历对象的小时数
+            mDate.set(Calendar.HOUR_OF_DAY, newHour);
+            // 调用日期和时间变化的回调方法
+            onDateTimeChanged();
+            if (isDateChanged) {
+                // 如果日期发生变化，更新日历对象的年、月、日
+                setCurrentYear(cal.get(Calendar.YEAR));
+                setCurrentMonth(cal.get(Calendar.MONTH));
+                setCurrentDay(cal.get(Calendar.DAY_OF_MONTH));
+            }
+        }
+    };
+
+    /**
+     * 分钟选择器值变化监听器，当分钟选择器的值发生变化时调用
+     */
+    private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            // 获取分钟选择器的最小和最大取值
+            int minValue = mMinuteSpinner.getMinValue();
+            int maxValue = mMinuteSpinner.getMaxValue();
+            int offset = 0;
+            if (oldVal == maxValue && newVal == minValue) {
+                // 从59分钟到0分钟，小时数加1
+                offset += 1;
+            } else if (oldVal == minValue && newVal == maxValue) {
+                // 从0分钟到59分钟，小时数减1
+                offset -= 1;
+            }
+            if (offset != 0) {
+                // 根据偏移量更新日历对象的小时数
+                mDate.add(Calendar.HOUR_OF_DAY, offset);
+                // 更新小时选择器的显示
+                mHourSpinner.setValue(getCurrentHour());
+                // 更新日期选择器的显示
+                updateDateControl();
+                int newHour = getCurrentHourOfDay();
+                if (newHour >= HOURS_IN_HALF_DAY) {
+                    // 如果小时数大于等于12，设置为下午
+                    mIsAm = false;
+                    // 更新上午/下午选择器的显示
+                    updateAmPmControl();
+                } else {
+                    // 如果小时数小于12，设置为上午
+                    mIsAm = true;
+                    // 更新上午/下午选择器的显示
+                    updateAmPmControl();
+                }
+            }
+            // 设置日历对象的分钟数
+            mDate.set(Calendar.MINUTE, newVal);
+            // 调用日期和时间变化的回调方法
+            onDateTimeChanged();
+        }
+    };
+
+    /**
+     * 上午/下午选择器值变化监听器，当上午/下午选择器的值发生变化时调用
+     */
+    private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
+        @Override
+        public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
+            // 切换上午/下午状态
+            mIsAm = !mIsAm;
+            if (mIsAm) {
+                // 从下午切换到上午，小时数减12
+                mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY);
+            } else {
+                // 从上午切换到下午，小时数加12
+                mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY);
+            }
+            // 更新上午/下午选择器的显示
+            updateAmPmControl显示
+            updateAmPmControl();
+            // 调用日期和时间变化的回调方法
+            onDateTimeChanged();
+        }
+    };
+
+    /**
+     * 日期和时间变化监听器接口，用于监听日期和时间的变化
+     */
+    public interface OnDateTimeChangedListener {
+        /**
+         * 当日期和时间发生变化时调用
+         * @param view 日期和时间选择器视图
+         * @param year 年份
+         * @param month 月份
+         * @param dayOfMonth 日期
+         * @param hourOfDay 小时数
+         * @param minute 分钟数
+         */
+        void onDateTimeChanged(DateTimePicker view, int year, int month,
+                int dayOfMonth, int hourOfDay, int minute);
+    }
+
+    /**
+     * 构造函数，使用当前时间初始化日期和时间选择器
+     * @param context 上下文对象
+     */
+    public DateTimePicker(Context context) {
+        this(context, System.currentTimeMillis());
+    }
+
+    /**
+     * 构造函数，使用指定的时间初始化日期和时间选择器
+     * @param context 上下文对象
+     * @param date 指定的时间（毫秒）
+     */
+    public DateTimePicker(Context context, long date) {
+        this(context, date, DateFormat.is24HourFormat(context));
+    }
+
+    /**
+     * 构造函数，使用指定的时间和是否为24小时制初始化日期和时间选择器
+     * @param context 上下文对象
+     * @param date 指定的时间（毫秒）
+     * @param is24HourView 是否为24小时制
+     */
+    public DateTimePicker(Context context, long date, boolean is24HourView) {
+        super(context);
+        // 初始化日历对象
+        mDate = Calendar.getInstance();
+        mInitialising = true;
+        // 判断当前小时数是否大于等于12，确定是否为下午
+        mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
+        // 加载布局
+        inflate(context, R.layout.datetime_picker, this);
+
+        // 获取日期选择器
+        mDateSpinner = (NumberPicker) findViewById(R.id.date);
+        // 设置日期选择器的最小和最大取值
+        mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
+        mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
+        // 设置日期选择器的值变化监听器
+        mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
+
+        // 获取小时选择器
+        mHourSpinner = (NumberPicker) findViewById(R.id.hour);
+        // 设置小时选择器的值变化监听器
+        mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
+        // 获取分钟选择器
+        mMinuteSpinner =  (NumberPicker) findViewById(R.id.minute);
+        // 设置分钟选择器的最小和最大取值
+        mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
+        mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
+        // 设置分钟选择器的长按更新间隔
+        mMinuteSpinner.setOnLongPressUpdateInterval(100);
+        // 设置分钟选择器的值变化监听器
+        mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
+
+        // 获取上午/下午显示字符串数组
+        String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();
+        // 获取上午/下午选择器
+        mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm);
+        // 设置上午/下午选择器的最小和最大取值
+        mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL);
+        mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL);
+        // 设置上午/下午选择器的显示值
+        mAmPmSpinner.setDisplayedValues(stringsForAmPm);
+        // 设置上午/下午选择器的值变化监听器
+        mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);
+
+        // 更新日期选择器的显示
+        updateDateControl();
+        // 更新小时选择器的显示
+        updateHourControl();
+        // 更新上午/下午选择器的显示
+        updateAmPmControl();
+
+        // 设置是否为24小时制
+        set24HourView(is24HourView);
+
+        // 设置当前日期和时间
+        setCurrentDate(date);
+
+        // 设置启用状态
+        setEnabled(isEnabled());
+
+        // 设置内容描述
+        mInitialising = false;
+    }
+
+    /**
+     * 设置启用状态
+     * @param enabled 是否启用
+     */
+    @Override
+    public void setEnabled(boolean enabled) {
+        if (mIsEnabled == enabled) {
+            return;
+        }
+        super.setEnabled(enabled);
+        // 设置日期选择器的启用状态
+        mDateSpinner.setEnabled(enabled);
+        // 设置分钟选择器的启用状态
+        mMinuteSpinner.setEnabled(enabled);
+        // 设置小时选择器的启用状态
+        mHourSpinner.setEnabled(enabled);
+        // 设置上午/下午选择器的启用状态
+        mAmPmSpinner.setEnabled(enabled);
+        mIsEnabled = enabled;
+    }
+
+    /**
+     * 获取启用状态
+     * @return 是否启用
+     */
+    @Override
+    public boolean isEnabled() {
+        return mIsEnabled;
+    }
+
+    /**
+     * 获取当前日期和时间的毫秒数
+     * @return 当前日期和时间的毫秒数
+     */
+    public long getCurrentDateInTimeMillis() {
+        return mDate.getTimeInMillis();
+    }
+
+    /**
+     * 设置当前日期和时间
+     * @param date 指定的时间（毫秒）
+     */
+    public void setCurrentDate(long date) {
+        Calendar cal = Calendar.getInstance();
+        cal.setTimeInMillis(date);
+        // 设置当前日期和时间的年、月、日、小时、分钟
+        setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
+                cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
+    }
+
+    /**
+     * 设置当前日期和时间
+     * @param year 年份
+     * @param month 月份
+     */
+    public void setCurrentDate(int year, int month, int dayOfMonth, int hourOfDay, int minute) {
+        mDate.set(Calendar.YEAR, year);
+        mDate.set(Calendar.MONTH, month);
+        mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+        mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
+        mDate.set(Calendar.MINUTE, minute);
+        mDate.set(Calendar.SECOND, 0);
+        mDate.set(Calendar.MILLISECOND, 0);
+
+        updateDateControl();
+        updateHourControl();
+        updateAmPmControl();
+    }
+
+    /**
+     * 更新日期选择器的显示
+     */
+    private void updateDateControl() {
+        Calendar cal = Calendar.getInstance();
+        cal.setTimeInMillis(mDate.getTimeInMillis());
+        int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
+        mDateSpinner.setValue(dayOfWeek - 1);
+    }
+
+    /**
+     * 更新小时选择器的显示
+     */
+    private void updateHourControl() {
+        int hour = getCurrentHour();
+        mHourSpinner.setValue(hour);
+    }
+
+    /**
+     * 更新上午/下午选择器的显示
+     */
+    private void updateAmPmControl() {
+        mAmPmSpinner.setValue(mIsAm ? 0 : 1);
+    }
+
+    /**
+     * 获取当前小时数
+     * @return 当前小时数
+     */
+    private int getCurrentHour() {
+        int hour = mDate.get(Calendar.HOUR);
+        if (hour == 0) {
+            hour = 12;
+        }
+        return hour;
+    }
+
+    /**
+     * 获取当前小时数（24小时制）
+     * @return 当前小时数（24小时制）
+     */
+    private int getCurrentHourOfDay() {
+        return mDate.get(Calendar.HOUR_OF_DAY);
+    }
+
+    /**
+     * 设置当前年份
+     * @param year 年份
+     */
+    private void setCurrentYear(int year) {
+        mDate.set(Calendar.YEAR, year);
+    }
+
+    /**
+     * 设置当前月份
+     * @param month 月份
+     */
+    private void setCurrentMonth(int month) {
+        mDate.set(Calendar.MONTH, month);
+    }
+
+    /**
+     * 设置当前日期
+     * @param dayOfMonth 日期
+     */
+    private void setCurrentDay(int dayOfMonth) {
+        mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+    }
+
+    /**
+     * 设置是否为24小时制
+     * @param is24HourView 是否为24小时制
+     */
+    public void set24HourView(boolean is24HourView) {
+        mIs24HourView = is24HourView;
+        if (mIs24HourView) {
+            mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW);
+            mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW);
+            mAmPmSpinner.setVisibility(View.GONE);
+        } else {
+            mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
+            mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
+            mAmPmSpinner.setVisibility(View.VISIBLE);
+        }
+        updateHourControl();
+    }
+
+    /**
+     * 调用日期和时间变化的回调方法
+     */
+    private void onDateTimeChanged() {
+        if (!mInitialising && mOnDateTimeChangedListener != null) {
+            mOnDateTimeChangedListener.onDateTimeChanged(this, mDate.get(Calendar.YEAR),
+                    mDate.get(Calendar.MONTH), mDate.get(Calendar.DAY_OF_MONTH),
+                    mDate.get(Calendar.HOUR_OF_DAY), mDate.get(Calendar.MINUTE));
+        }
+    }
+
+    /**
+     * 设置日期和时间变化监听器
+     * @param listener 监听器对象
+     */
+    public void setOnDateTimeChangedListener(OnDateTimeChangedListener listener) {
+        mOnDateTimeChangedListener {insert\_element\_6\_PSBsaXN0ZW5lcjsKICAgIH0KfQpgYGAKCg==}### 

MiNotes-master/app/src/main/java/net/micode/notes/ui/DateTimePickerDialog.java

@@ -0,0 +1,101 @@
+/*
+ * 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 java.util.Calendar;
+
+import net.micode.notes.R;
+import net.micode.notes.ui.DateTimePicker;
+import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.text.format.DateFormat;
+import android.text.format.DateUtils;
+
+/**
+ * 日期时间选择对话框
+ */
+public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
+    private Calendar mDate = Calendar.getInstance(); // 当前日期
+    private boolean mIs24HourView; // 是否24小时制
+    private OnDateTimeSetListener mOnDateTimeSetListener; // 日期时间设置回调
+    private DateTimePicker mDateTimePicker; // 日期时间选择器
+
+    // 日期时间设置回调接口
+    public interface OnDateTimeSetListener {
+        void OnDateTimeSet(AlertDialog dialog, long date);
+    }
+
+    public DateTimePickerDialog(Context context, long date) {
+        super(context);
+        mDateTimePicker = new DateTimePicker(context);
+        setView(mDateTimePicker); // 设置自定义视图
+        // 日期时间变化监听器
+        mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
+            public void onDateTimeChanged(DateTimePicker view, int year, int month,
+                    int dayOfMonth, int hourOfDay, int minute) {
+                // 更新日期对象
+                mDate.set(Calendar.YEAR, year);
+                mDate.set(Calendar.MONTH, month);
+                mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+                mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
+                mDate.set(Calendar.MINUTE, minute);
+                updateTitle(mDate.getTimeInMillis()); // 更新标题显示
+            }
+        });
+        
+        // 初始化日期
+        mDate.setTimeInMillis(date);
+        mDate.set(Calendar.SECOND, 0);
+        mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
+        
+        // 设置按钮
+        setButton(context.getString(R.string.datetime_dialog_ok), this);
+        setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
+        
+        // 设置时间显示格式
+        set24HourView(DateFormat.is24HourFormat(this.getContext()));
+        updateTitle(mDate.getTimeInMillis());
+    }
+
+    // 设置24小时制显示
+    public void set24HourView(boolean is24HourView) {
+        mIs24HourView = is24HourView;
+    }
+
+    // 设置日期时间设置监听器
+    public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
+        mOnDateTimeSetListener = callBack;
+    }
+
+    // 更新对话框标题显示
+    private void updateTitle(long date) {
+        int flag = DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_TIME;
+        flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
+        setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
+    }
+
+    // 确定按钮点击事件
+    public void onClick(DialogInterface arg0, int arg1) {
+        if (mOnDateTimeSetListener != null) {
+            mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/DropdownMenu.java

@@ -0,0 +1,69 @@
+/*
+ * 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.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.PopupMenu;
+import android.widget.PopupMenu.OnMenuItemClickListener;
+
+import net.micode.notes.R;
+
+/**
+ * 下拉菜单组件
+ */
+public class DropdownMenu {
+    private Button mButton; // 触发按钮
+    private PopupMenu mPopupMenu; // 弹出菜单
+    private Menu mMenu; // 菜单对象
+
+    public DropdownMenu(Context context, Button button, int menuId) {
+        mButton = button;
+        mButton.setBackgroundResource(R.drawable.dropdown_icon); // 设置下拉图标
+        mPopupMenu = new PopupMenu(context, mButton); // 创建弹出菜单
+        mMenu = mPopupMenu.getMenu();
+        // 从菜单资源填充菜单
+        mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
+        // 按钮点击显示菜单
+        mButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                mPopupMenu.show();
+            }
+        });
+    }
+
+    // 设置菜单项点击监听器
+    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
+        if (mPopupMenu != null) {
+            mPopupMenu.setOnMenuItemClickListener(listener);
+        }
+    }
+
+    // 查找菜单项
+    public MenuItem findItem(int id) {
+        return mMenu.findItem(id);
+    }
+
+    // 设置按钮文本
+    public void setTitle(CharSequence title) {
+        mButton.setText(title);
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/FoldersListAdapter.java

@@ -0,0 +1,124 @@
+/*
+ * 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.view.View;
+import android.view.ViewGroup;
+import android.widget.CursorAdapter;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+
+/**
+ * FoldersListAdapter类继承自CursorAdapter，用于将数据库中的文件夹数据绑定到ListView的每个项上，
+ * 显示文件夹的名称。
+ */
+public class FoldersListAdapter extends CursorAdapter {
+    // 查询数据库时使用的投影列数组，指定要查询的列
+    public static final String [] PROJECTION = {
+        NoteColumns.ID,
+        NoteColumns.SNIPPET
+    };
+
+    // 定义各列在投影数组中的索引，方便从游标中获取数据
+    public static final int ID_COLUMN   = 0;
+    public static final int NAME_COLUMN = 1;
+
+    /**
+     * 构造函数，初始化适配器
+     * @param context 上下文对象
+     * @param c 数据库游标
+     */
+    public FoldersListAdapter(Context context, Cursor c) {
+        super(context, c);
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * 创建新的列表项视图
+     * @param context 上下文对象
+     * @param cursor 数据库游标
+     * @param parent 父视图
+     * @return 新的列表项视图
+     */
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        return new FolderListItem(context);
+    }
+
+    /**
+     * 将数据绑定到列表项视图上
+     * @param view 列表项视图
+     * @param context 上下文对象
+     * @param cursor 数据库游标
+     */
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        if (view instanceof FolderListItem) {
+            // 如果是根文件夹，显示特定的名称，否则显示文件夹的摘要作为名称
+            String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                    .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+            // 将文件夹名称绑定到列表项视图上
+            ((FolderListItem) view).bind(folderName);
+        }
+    }
+
+    /**
+     * 获取指定位置的文件夹名称
+     * @param context 上下文对象
+     * @param position 列表项的位置
+     * @return 文件夹名称
+     */
+    public String getFolderName(Context context, int position) {
+        // 获取指定位置的游标
+        Cursor cursor = (Cursor) getItem(position);
+        return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+    }
+
+    /**
+     * 文件夹列表项的内部类，用于显示文件夹名称
+     */
+    private class FolderListItem extends LinearLayout {
+        // 显示文件夹名称的TextView
+        private TextView mName;
+
+        /**
+         * 构造函数，初始化文件夹列表项视图
+         * @param context 上下文对象
+         */
+        public FolderListItem(Context context) {
+            super(context);
+            // 加载文件夹列表项的布局
+            inflate(context, R.layout.folder_list_item, this);
+            // 获取显示文件夹名称的TextView
+            mName = (TextView) findViewById(R.id.tv_folder_name);
+        }
+
+        /**
+         * 将文件夹名称绑定到TextView上
+         * @param name 文件夹名称
+         */
+        public void bind(String name) {
+            mName.setText(name){insert\_element\_7\_OwogICAgICAgIH0KICAgIH0KfQo=}```
+
+###

MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java

@@ -0,0 +1,287 @@
+/*
+ * 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.app.Activity;
+import android.app.AlarmManager;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.app.SearchManager;
+import android.appwidget.AppWidgetManager;
+import android.content.ContentUris;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.graphics.Paint;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.TextUtils;
+import android.text.format.DateUtils;
+import android.text.style.BackgroundColorSpan;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.WindowManager;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.PopupMenu;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.TextNote;
+import net.micode.notes.model.WorkingNote;
+import net.micode.notes.model.WorkingNote.NoteSettingChangedListener;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.ResourceParser;
+import net.micode.notes.tool.ResourceParser.TextAppearanceResources;
+import net.micode.notes.ui.DateTimePickerDialog.OnDateTimeSetListener;
+import net.micode.notes.ui.NoteEditText.OnTextViewChangeListener;
+import net.micode.notes.widget.NoteWidgetProvider_2x;
+import net.micode.notes.widget.NoteWidgetProvider_4x;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * NoteEditActivity类用于处理笔记的编辑操作，包括初始化界面、加载笔记数据、处理用户输入等。
+ */
+public class NoteEditActivity extends Activity implements OnClickListener,
+        NoteSettingChangedListener, OnTextViewChangeListener {
+
+    /**
+     * 头部视图的ViewHolder类，用于存储头部视图的控件引用
+     */
+    private class HeadViewHolder {
+        // 显示修改日期的TextView
+        public TextView tvModified;
+        // 显示提醒图标的ImageView
+        public ImageView ivAlertIcon;
+        // 显示提醒日期的TextView
+        public TextView tvAlertDate;
+        // 设置背景颜色的ImageView
+        public ImageView ibSetBgColor;
+    }
+
+    // 背景颜色选择按钮与颜色ID的映射
+    private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
+    static {
+        sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
+        sBgSelectorBtnsMap.put(R.id.iv_bg_red, ResourceParser.RED);
+        sBgSelectorBtnsMap.put(R.id.iv_bg_blue, ResourceParser.BLUE);
+        sBgSelectorBtnsMap.put(R.id.iv_bg_green, ResourceParser.GREEN);
+        sBgSelectorBtnsMap.put(R.id.iv_bg_white, ResourceParser.WHITE);
+    }
+
+    // 背景颜色ID与选择状态图标ID的映射
+    private static final Map<Integer, Integer> sBgSelectorSelectionMap = new HashMap<Integer, Integer>();
+    static {
+        sBgSelectorSelectionMap.put(ResourceParser.YELLOW, R.id.iv_bg_yellow_select);
+        sBgSelectorSelectionMap.put(ResourceParser.RED, R.id.iv_bg_red_select);
+        sBgSelectorSelectionMap.put(ResourceParser.BLUE, R.id.iv_bg_blue_select);
+        sBgSelectorSelectionMap.put(ResourceParser.GREEN, R.id.iv_bg_green_select);
+        sBgSelectorSelectionMap.put(ResourceParser.WHITE, R.id.iv_bg_white_select);
+    }
+
+    // 字体大小选择按钮与字体大小ID的映射
+    private static final Map<Integer, Integer> sFontSizeBtnsMap = new HashMap<Integer, Integer>();
+    static {
+        sFontSizeBtnsMap.put(R.id.ll_font_large, ResourceParser.TEXT_LARGE);
+        sFontSizeBtnsMap.put(R.id.ll_font_small, ResourceParser.TEXT_SMALL);
+        sFontSizeBtnsMap.put(R.id.ll_font_normal, ResourceParser.TEXT_MEDIUM);
+        sFontSizeBtnsMap.put(R.id.ll_font_super, ResourceParser.TEXT_SUPER);
+    }
+
+    // 字体大小ID与选择状态图标ID的映射
+    private static final Map<Integer, Integer> sFontSelectorSelectionMap = new HashMap<Integer, Integer>();
+    static {
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_LARGE, R.id.iv_large_select);
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_SMALL, R.id.iv_small_select);
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_MEDIUM, R.id.iv_medium_select);
+        sFontSelectorSelectionMap.put(ResourceParser.TEXT_SUPER, R.id.iv_super_select);
+    }
+
+    private static final String TAG = "NoteEditActivity";
+
+    // 头部视图的ViewHolder
+    private HeadViewHolder mNoteHeaderHolder;
+    // 头部视图面板
+    private View mHeadViewPanel;
+    // 背景颜色选择器视图
+    private View mNoteBgColorSelector;
+    // 字体大小选择器视图
+    private View mFontSizeSelector;
+    // 笔记编辑器
+    private EditText mNoteEditor;
+    // 笔记编辑器面板
+    private View mNoteEditorPanel;
+    // 工作笔记对象
+    private WorkingNote mWorkingNote;
+    // 共享偏好设置
+    private SharedPreferences mSharedPrefs;
+    // 字体大小ID
+    private int mFontSizeId;
+
+    private static final String PREFERENCE_FONT_SIZE = "pref_font_size";
+
+    private static final int SHORTCUT_ICON_TITLE_MAX_LEN = 10;
+
+    // 已选中和未选中标记
+    public static final String TAG_CHECKED = String.valueOf('\u221A');
+    public static final String TAG_UNCHECKED = String.valueOf('\u25A1');
+
+    // 编辑文本列表
+    private LinearLayout mEditTextList;
+    // 用户查询关键字
+    private String mUserQuery;
+    // 正则表达式模式
+    private Pattern mPattern;
+
+    /**
+     * 活动创建时调用，初始化界面和资源
+     * @param savedInstanceState 保存的实例状态
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        // 设置布局
+        this.setContentView(R.layout.note_edit);
+
+        // 如果保存的实例状态为空且初始化活动状态失败，则关闭活动
+        if (savedInstanceState == null && !initActivityState(getIntent())) {
+            finish();
+            return;
+        }
+        // 初始化资源
+        initResources();
+    }
+
+    /**
+     * 恢复活动状态时调用，恢复之前保存的状态
+     * @param savedInstanceState 保存的实例状态
+     */
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        if (savedInstanceState != null && savedInstanceState.containsKey(Intent.EXTRA_UID)) {
+            // 创建一个查看笔记的意图
+            Intent intent = new Intent(Intent.ACTION_VIEW);
+            // 从保存的状态中获取笔记ID
+            intent.putExtra(Intent.EXTRA_UID, savedInstanceState.getLong(Intent.EXTRA_UID));
+            // 初始化活动状态
+            if (!initActivityState(intent)) {
+                finish();
+                return;
+            }
+            Log.d(TAG, "Restoring from killed activity");
+        }
+    }
+
+    /**
+     * 初始化活动状态，根据意图加载笔记数据
+     * @param intent 意图对象
+     * @return 初始化是否成功
+     */
+    private boolean initActivityState(Intent intent) {
+        mWorkingNote = null;
+        // 如果意图动作是查看笔记
+        if (TextUtils.equals(Intent.ACTION_VIEW, intent.getAction())) {
+            // 获取笔记ID
+            long noteId = intent.getLongExtra(Intent.EXTRA_UID, 0);
+            mUserQuery = "";
+
+            // 如果意图包含搜索结果信息
+            if (intent.hasExtra(SearchManager.EXTRA_DATA_KEY)) {
+                noteId = Long.parseLong(intent.getStringExtra(SearchManager.EXTRA_DATA_KEY));
+                mUserQuery = intent.getStringExtra(SearchManager.USER_QUERY);
+            }
+
+            // 检查笔记是否在数据库中可见
+            if (!DataUtils.visibleInNoteDatabase(getContentResolver(), noteId, Notes.TYPE_NOTE)) {
+                // 笔记不可见，跳转到笔记列表活动
+                Intent jump = new Intent(this, NotesListActivity.class);
+                startActivity(jump);
+                // 显示笔记不存在的提示信息
+                showToast(R.string.error_note_not_exist);
+                finish();
+                return false;
+            } else {
+                // 加载笔记数据
+                mWorkingNote = WorkingNote.load(this, noteId);
+                if (mWorkingNote == null) {
+                    Log.e(TAG, "load note failed with note id" + noteId);
+                    finish();
+                    return false;
+                }
+            }
+            // 设置软键盘状态
+            getWindow().setSoftInputMode(
+                    WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN
+                            | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
+        } else if(TextUtils.equals(Intent.ACTION_INSERT_OR_EDIT, intent.getAction())) {
+            // 新建笔记
+            // 获取文件夹ID
+            long folderId = intent.getLongExtra(Notes.INTENT_EXTRA_FOLDER_ID, 0);
+            // 获取小部件ID
+            int widgetId = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_ID,
+                    AppWidgetManager.INVALID_APPWIDGET_ID);
+            // 获取小部件类型
+            int widgetType = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_TYPE,
+                    Notes.TYPE_WIDGET_INVALIDE);
+            // 获取背景资源ID
+            int bgResId = intent.getIntExtra(Notes.INTENT_EXTRA_BACKGROUND_ID,
+                    ResourceParser.getDefaultBgId(this));
+
+            // 解析通话记录笔记
+            String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
+            long callDate = intent.getLongExtra(Notes.INTENT_EXTRA_CALL_DATE, 0);
+            if (callDate != 0 && phoneNumber != null) {
+                if (TextUtils.isEmpty(phoneNumber)) {
+                    Log.w(TAG, "The call record number is null");
+                }
+                long noteId = 0;
+                // 根据电话号码和通话日期获取笔记ID
+                if ((noteId = DataUtils.getNoteIdByPhoneNumberAndCallDate(getContentResolver(),
+                        phoneNumber, callDate)) > 0) {
+                    // 加载通话记录笔记
+                    mWorkingNote = WorkingNote.load(this, noteId);
+                    if (mWorkingNote == null) {
+                        Log.e(TAG, "load call note failed with note id" + noteId);
+                        finish();
+                        return false;
+                    }
+                }
+            }
+        }
+        return true;
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java

@@ -0,0 +1,294 @@
+/*
+ * 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.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;
+
+/**
+ * NoteEditText类继承自EditText，用于处理笔记编辑时的文本输入，
+ * 扩展了一些功能，如处理按键事件、触摸事件、上下文菜单等，并提供了文本变化的回调接口。
+ */
+public class NoteEditText extends EditText {
+    private static final String TAG = "NoteEditText";
+    // 编辑文本在列表中的索引
+    private int mIndex;
+    // 删除操作前的选择起始位置
+    private int mSelectionStartBeforeDelete;
+
+    // 定义支持的链接协议
+    private static final String SCHEME_TEL = "tel:" ;
+    private static final String SCHEME_HTTP = "http:" ;
+    private static final String SCHEME_EMAIL = "mailto:" ;
+
+    // 协议与对应的操作资源ID映射
+    private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
+    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);
+    }
+
+    /**
+     * 文本视图变化监听器接口，用于处理编辑文本的删除、插入和文本变化事件
+     */
+    public interface OnTextViewChangeListener {
+        /**
+         * 当按下删除键且文本为空时，删除当前编辑文本
+         * @param index 编辑文本的索引
+         * @param text 编辑文本的内容
+         */
+        void onEditTextDelete(int index, String text);
+
+        /**
+         * 当按下回车键时，在当前编辑文本后插入新的编辑文本
+         * @param index 新编辑文本的索引
+         * @param text 要插入的文本
+         */
+        void onEditTextEnter(int index, String text);
+
+        /**
+         * 当文本内容变化时，隐藏或显示选项
+         * @param index 编辑文本的索引
+         * @param hasText 是否有文本内容
+         */
+        void onTextChange(int index, boolean hasText);
+    }
+
+    // 文本视图变化监听器
+    private OnTextViewChangeListener mOnTextViewChangeListener;
+
+    /**
+     * 构造函数，使用默认属性
+     * @param context 上下文对象
+     */
+    public NoteEditText(Context context) {
+        super(context, null);
+        mIndex = 0;
+    }
+
+    /**
+     * 设置编辑文本的索引
+     * @param index 索引值
+     */
+    public void setIndex(int index) {
+        mIndex = index;
+    }
+
+    /**
+     * 设置文本视图变化监听器
+     * @param listener 监听器对象
+     */
+    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
+        mOnTextViewChangeListener = listener;
+    }
+
+    /**
+     * 构造函数，使用属性集
+     * @param context 上下文对象
+     * @param attrs 属性集
+     */
+    public NoteEditText(Context context, AttributeSet attrs) {
+        super(context, attrs, android.R.attr.editTextStyle);
+    }
+
+    /**
+     * 构造函数，使用属性集和默认样式
+     * @param context 上下文对象
+     * @param attrs 属性集
+     * @param defStyle 默认样式
+     */
+    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        // TODO Auto-generated constructor stub
+    }
+
+    /**
+     * 处理触摸事件，根据触摸位置设置文本选择
+     * @param event 触摸事件
+     * @return 是否处理该事件
+     */
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                // 获取触摸点的坐标
+                int x = (int) event.getX();
+                int y = (int) event.getY();
+                // 调整坐标以适应文本布局
+                x -= getTotalPaddingLeft();
+                y -= getTotalPaddingTop();
+                x += getScrollX();
+                y += getScrollY();
+
+                // 获取文本布局
+                Layout layout = getLayout();
+                // 根据坐标获取行号和偏移量
+                int line = layout.getLineForVertical(y);
+                int off = layout.getOffsetForHorizontal(line, x);
+                // 设置文本选择位置
+                Selection.setSelection(getText(), off);
+                break;
+        }
+
+        return super.onTouchEvent(event);
+    }
+
+    /**
+     * 处理按键按下事件，记录删除操作前的选择起始位置
+     * @param keyCode 按键码
+     * @param event 按键事件
+     * @return 是否处理该事件
+     */
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_ENTER:
+                if (mOnTextViewChangeListener != null) {
+                    return false;
+                }
+                break;
+            case KeyEvent.KEYCODE_DEL:
+                mSelectionStartBeforeDelete = getSelectionStart();
+                break;
+            default:
+                break;
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
+    /**
+     * 处理按键抬起事件，根据按键码调用相应的监听器方法
+     * @param keyCode 按键码
+     * @param event 按键事件
+     * @return 是否处理该事件
+     */
+    @Override
+    public boolean onKeyUp(int keyCode, KeyEvent event) {
+        switch(keyCode) {
+            case KeyEvent.KEYCODE_DEL:
+                if (mOnTextViewChangeListener != null) {
+                    // 如果选择起始位置为0且不是第一个编辑文本，则删除当前编辑文本
+                    if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
+                        mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
+                        return true;
+                    }
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not seted");
+                }
+                break;
+            case KeyEvent.KEYCODE_ENTER:
+                if (mOnTextViewChangeListener != null) {
+                    // 获取选择起始位置
+                    int selectionStart = getSelectionStart();
+                    // 获取选择位置之后的文本
+                    String text = getText().subSequence(selectionStart, length()).toString();
+                    // 设置当前编辑文本为选择位置之前的文本
+                    setText(getText().subSequence(0, selectionStart));
+                    // 在当前编辑文本后插入新的编辑文本
+                    mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
+                } else {
+                    Log.d(TAG, "OnTextViewChangeListener was not seted");
+                }
+                break;
+            default:
+                break;
+        }
+        return super.onKeyUp(keyCode, event);
+    }
+
+    /**
+     * 处理焦点变化事件，根据焦点状态和文本内容调用监听器方法
+     * @param focused 是否获得焦点
+     * @param direction 焦点变化方向
+     * @param previouslyFocusedRect 之前聚焦的矩形区域
+     */
+    @Override
+    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
+        if (mOnTextViewChangeListener != null) {
+            if (!focused && TextUtils.isEmpty(getText())) {
+                // 失去焦点且文本为空时，调用文本变化监听器
+                mOnTextViewChangeListener.onTextChange(mIndex, false);
+            } else {
+                mOnTextViewChangeListener.onTextChange(mIndex, true);
+            }
+        }
+        super.onFocusChanged(focused, direction, previouslyFocusedRect);
+    }
+
+    /**
+     * 创建上下文菜单，处理链接相关的菜单项
+     * @param menu 上下文菜单
+     */
+    @Override
+    protected void onCreateContextMenu(ContextMenu menu) {
+        if (getText() instanceof Spanned) {
+            // 获取选择的起始和结束位置
+            int selStart = getSelectionStart();
+            int selEnd = getSelectionEnd();
+
+            int min = Math.min(selStart, selEnd);
+            int max = Math.max(selStart, selEnd);
+
+            // 获取选择范围内的URLSpan
+            final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
+            if (urls.length == 1) {
+                int defaultResId = 0;
+                // 根据链接协议获取对应的操作资源ID
+                for(String schema: sSchemaActionResMap.keySet()) {
+                    if(urls[0].getURL().indexOf(schema) >= 0) {
+                        defaultResId = sSchemaActionResMap.get(schema);
+                        break;
+                    }
+                }
+
+                if (defaultResId == 0) {
+                    defaultResId = R.string.note_link_other;
+                }
+
+                // 添加菜单项并设置点击监听器
+                menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
+                        new OnMenuItemClickListener() {
+                            public boolean onMenuItemClick(MenuItem item) {
+                                // 处理链接点击事件
+                                urls[0].onClick(NoteEditText.this);
+                                return true;
+                            }
+                        });
+            }
+        }
+        super.onCreateContextMenu(menu);
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteItemData.java

@@ -0,0 +1,338 @@
+/*
+ * 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;
+
+/**
+ * NoteItemData类用于封装笔记项的数据，从数据库游标中提取并存储笔记的各种信息，
+ * 如笔记ID、提醒日期、背景颜色、创建日期等，同时提供了获取这些信息的方法。
+ */
+public class NoteItemData {
+    // 查询数据库时使用的投影列数组，指定要查询的列
+    static final String [] PROJECTION = 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,
+    };
+
+    // 定义各列在投影数组中的索引，方便从游标中获取数据
+    private static final int ID_COLUMN                    = 0;
+    private static final int ALERTED_DATE_COLUMN          = 1;
+    private static final int BG_COLOR_ID_COLUMN           = 2;
+    private static final int CREATED_DATE_COLUMN          = 3;
+    private static final int HAS_ATTACHMENT_COLUMN        = 4;
+    private static final int MODIFIED_DATE_COLUMN         = 5;
+    private static final int NOTES_COUNT_COLUMN           = 6;
+    private static final int PARENT_ID_COLUMN             = 7;
+    private static final int SNIPPET_COLUMN               = 8;
+    private static final int TYPE_COLUMN                  = 9;
+    private static final int WIDGET_ID_COLUMN             = 10;
+    private static final int WIDGET_TYPE_COLUMN           = 11;
+
+    // 存储笔记的各种属性
+    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;
+
+    // 标记笔记项在列表中的位置信息
+    private boolean mIsLastItem;
+    private boolean mIsFirstItem;
+    private boolean mIsOnlyOneItem;
+    private boolean mIsOneNoteFollowingFolder;
+    private boolean mIsMultiNotesFollowingFolder;
+
+    /**
+     * 构造函数，从游标中提取笔记数据并初始化对象的属性
+     * @param context 上下文对象
+     * @param cursor 数据库游标，包含笔记数据
+     */
+    public NoteItemData(Context context, Cursor cursor) {
+        mId = cursor.getLong(ID_COLUMN);
+        mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
+        mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
+        mCreatedDate = cursor.getLong(CREATED_DATE_COLUMN);
+        mHasAttachment = (cursor.getInt(HAS_ATTACHMENT_COLUMN) > 0) ? true : false;
+        mModifiedDate = cursor.getLong(MODIFIED_DATE_COLUMN);
+        mNotesCount = cursor.getInt(NOTES_COUNT_COLUMN);
+        mParentId = cursor.getLong(PARENT_ID_COLUMN);
+        mSnippet = cursor.getString(SNIPPET_COLUMN);
+        // 移除笔记摘要中的特定标记
+        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 = "";
+        // 如果笔记的父ID是通话记录文件夹的ID
+        if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
+            // 获取通话记录的电话号码
+            mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId);
+            if (!TextUtils.isEmpty(mPhoneNumber)) {
+                // 根据电话号码获取联系人姓名
+                mName = Contact.getContact(context, mPhoneNumber);
+                if (mName == null) {
+                    mName = mPhoneNumber;
+                }
+            }
+        }
+
+        if (mName == null) {
+            mName = "";
+        }
+        // 检查笔记项在列表中的位置
+        checkPostion(cursor);
+    }
+
+    /**
+     * 检查笔记项在列表中的位置，设置相应的标记
+     * @param cursor 数据库游标
+     */
+    private void checkPostion(Cursor cursor) {
+        mIsLastItem = cursor.isLast() ? true : false;
+        mIsFirstItem = cursor.isFirst() ? true : false;
+        mIsOnlyOneItem = (cursor.getCount() == 1);
+        mIsMultiNotesFollowingFolder = false;
+        mIsOneNoteFollowingFolder = false;
+
+        // 如果笔记类型是普通笔记且不是第一项
+        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {
+            int position = cursor.getPosition();
+            if (cursor.moveToPrevious()) {
+                // 如果前一项是文件夹或系统项
+                if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
+                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {
+                    if (cursor.getCount() > (position + 1)) {
+                        // 后续有多条笔记跟随文件夹
+                        mIsMultiNotesFollowingFolder = true;
+                    } else {
+                        // 后续只有一条笔记跟随文件夹
+                        mIsOneNoteFollowingFolder = true;
+                    }
+                }
+                if (!cursor.moveToNext()) {
+                    throw new IllegalStateException("cursor move to previous but can't move back");
+                }
+            }
+        }
+    }
+
+    /**
+     * 判断是否是文件夹后跟随的第一条笔记
+     * @return 如果是返回true，否则返回false
+     */
+    public boolean isOneFollowingFolder() {
+        return mIsOneNoteFollowingFolder;
+    }
+
+    /**
+     * 判断是否是文件夹后跟随的多条笔记之一
+     * @return 如果是返回true，否则返回false
+     */
+    public boolean isMultiFollowingFolder() {
+        return mIsMultiNotesFollowingFolder;
+    }
+
+    /**
+     * 判断是否是列表中的最后一项
+     * @return 如果是返回true，否则返回false
+     */
+    public boolean isLast() {
+        return mIsLastItem;
+    }
+
+    /**
+     * 获取通话记录的联系人姓名
+     * @return 联系人姓名
+     */
+    public String getCallName() {
+        return mName;
+    }
+
+    /**
+     * 判断是否是列表中的第一项
+     * @return 如果是返回true，否则返回false
+     */
+    public boolean isFirst() {
+        return mIsFirstItem;
+    }
+
+    /**
+     * 判断列表中是否只有一项
+     * @return 如果是返回true，否则返回false
+     */
+    public boolean isSingle() {
+        return mIsOnlyOneItem;
+    }
+
+    /**
+     * 获取笔记的ID
+     * @return 笔记ID
+     */
+    public long getId() {
+        return mId;
+    }
+
+    /**
+     * 获取笔记的提醒日期
+     * @return 提醒日期
+     */
+    public long getAlertDate() {
+        return mAlertDate;
+    }
+
+    /**
+     * 获取笔记的创建日期
+     * @return 创建日期
+     */
+    public long getCreatedDate() {
+        return mCreatedDate;
+    }
+
+    /**
+     * 判断笔记是否有附件
+     * @return 如果有附件返回true，否则返回false
+     */
+    public boolean hasAttachment() {
+        return mHasAttachment;
+    }
+
+    /**
+     * 获取笔记的修改日期
+     * @return 修改日期
+     */
+    public long getModifiedDate() {
+        return mModifiedDate;
+    }
+
+    /**
+     * 获取笔记的背景颜色ID
+     * @return 背景颜色ID
+     */
+    public int getBgColorId() {
+        return mBgColorId;
+    }
+
+    /**
+     * 获取笔记的父ID
+     * @return 父ID
+     */
+    public long getParentId() {
+        return mParentId;
+    }
+
+    /**
+     * 获取笔记所在文件夹中的笔记数量
+     * @return 笔记数量
+     */
+    public int getNotesCount() {
+        return mNotesCount;
+    }
+
+    /**
+     * 获取笔记所在文件夹的ID
+     * @return 文件夹ID
+     */
+    public long getFolderId () {
+        return mParentId;
+    }
+
+    /**
+     * 获取笔记的类型
+     * @return 笔记类型
+     */
+    public int getType() {
+        return mType;
+    }
+
+    /**
+     * 获取笔记小部件的类型
+     * @return 小部件类型
+     */
+    public int getWidgetType() {
+        return mWidgetType;
+    }
+
+    /**
+     * 获取笔记小部件的ID
+     * @return 小部件ID
+     */
+    public int getWidgetId() {
+        return mWidgetId;
+    }
+
+    /**
+     * 获取笔记的摘要
+     * @return 笔记摘要
+     */
+    public String getSnippet() {
+        return mSnippet;
+    }
+
+    /**
+     * 判断笔记是否有提醒
+     * @return 如果有提醒返回true，否则返回false
+     */
+    public boolean hasAlert() {
+        return (mAlertDate > 0);
+    }
+
+    /**
+     * 判断笔记是否是通话记录笔记
+     * @return 如果是通话记录笔记返回true，否则返回false
+     */
+    public boolean isCallRecord() {
+        return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
+    }
+
+    /**
+     * 从游标中获取笔记的类型
+     * @param cursor 数据库游标
+     * @return 笔记类型
+     */
+    public static int getNoteType(Cursor cursor) {
+        return cursor.getInt(TYPE_COLUMN);
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListActivity.java

@@ -0,0 +1,348 @@
+/*
+ * 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.R.menu;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.appwidget.AppWidgetManager;
+import android.content.AsyncQueryHandler;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.database.Cursor;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
+import android.util.Log;
+import android.view.ActionMode;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.Display;
+import android.view.HapticFeedbackConstants;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MenuItem.OnMenuItemClickListener;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.View.OnCreateContextMenuListener;
+import android.view.View.OnTouchListener;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ListView;
+import android.widget.PopupMenu;
+import android.widget.TextView;
+import android.widget.Toast;
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.remote.GTaskSyncService;
+import net.micode.notes.model.WorkingNote;
+import net.micode.notes.tool.BackupUtils;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.ResourceParser;
+import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
+import net.micode.notes.widget.NoteWidgetProvider_2x;
+import net.micode.notes.widget.NoteWidgetProvider_4x;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.HashSet;
+
+/**
+ * NotesListActivity类用于显示笔记列表，处理笔记列表的初始化、查询、点击事件等操作。
+ */
+public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+    // 文件夹笔记列表查询的令牌
+    private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
+    // 文件夹列表查询的令牌
+    private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
+    // 文件夹删除菜单的ID
+    private static final int MENU_FOLDER_DELETE = 0;
+    // 文件夹查看菜单的ID
+    private static final int MENU_FOLDER_VIEW = 1;
+    // 文件夹重命名菜单的ID
+    private static final int MENU_FOLDER_CHANGE_NAME = 2;
+    // 应用介绍的偏好设置键
+    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
+
+    /**
+     * 列表编辑状态的枚举类型
+     */
+    private enum ListEditState {
+        NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
+    };
+
+    // 当前列表编辑状态
+    private ListEditState mState;
+    // 后台查询处理器
+    private BackgroundQueryHandler mBackgroundQueryHandler;
+    // 笔记列表适配器
+    private NotesListAdapter mNotesListAdapter;
+    // 笔记列表视图
+    private ListView mNotesListView;
+    // 新增笔记按钮
+    private Button mAddNewNote;
+    // 菜单设置按钮
+    private Button mMenuSet;
+    // 是否分发事件
+    private boolean mDispatch;
+    // 初始Y坐标
+    private int mOriginY;
+    // 分发Y坐标
+    private int mDispatchY;
+    // 标题栏TextView
+    private TextView mTitleBar;
+    // 当前文件夹ID
+    private long mCurrentFolderId;
+    // 内容解析器
+    private ContentResolver mContentResolver;
+    // 模式回调对象
+    private ModeCallback mModeCallBack;
+
+    private static final String TAG = "NotesListActivity";
+
+    // 笔记列表视图滚动速率
+    public static final int NOTES_LISTVIEW_SCROLL_RATE = 30;
+    // 焦点笔记数据项
+    private NoteItemData mFocusNoteDataItem;
+    // 普通查询的选择条件
+    private static final String NORMAL_SELECTION = NoteColumns.PARENT_ID + "=?";
+    // 根文件夹查询的选择条件
+    private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>"
+            + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR ("
+            + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND "
+            + NoteColumns.NOTES_COUNT + ">0)";
+
+    // 打开笔记的请求码
+    private final static int REQUEST_CODE_OPEN_NODE = 102;
+    // 新建笔记的请求码
+    private final static int REQUEST_CODE_NEW_NODE  = 103;
+
+    /**
+     * 活动创建时调用，初始化界面和资源
+     * @param savedInstanceState 保存的实例状态
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        // 设置布局
+        setContentView(R.layout.note_list);
+        // 初始化资源
+        initResources();
+
+        /**
+         * Insert an introduction when user firstly use this application
+         */
+        // 当用户首次使用应用时插入介绍笔记
+        setAppInfoFromRawRes();
+    }
+
+    /**
+     * 处理活动返回结果
+     * @param requestCode 请求码
+     * @param resultCode 结果码
+     * @param data 返回的数据
+     */
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        if (resultCode == RESULT_OK
+                && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
+            // 刷新笔记列表
+            mNotesListAdapter.changeCursor(null);
+        } else {
+            super.onActivityResult(requestCode, resultCode, data);
+        }
+    }
+
+    /**
+     * 从原始资源中设置应用信息，首次使用应用时插入介绍笔记
+     */
+    private void setAppInfoFromRawRes() {
+        // 获取共享偏好设置
+        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
+        if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) {
+            StringBuilder sb = new StringBuilder();
+            InputStream in = null;
+            try {
+                // 打开介绍文件的输入流
+                in = getResources().openRawResource(R.raw.introduction);
+                if (in != null) {
+                    // 创建输入流读取器和缓冲读取器
+                    InputStreamReader isr = new InputStreamReader(in);
+                    BufferedReader br = new BufferedReader(isr);
+                    char [] buf = new char[1024];
+                    int len = 0;
+                    // 读取文件内容
+                    while ((len = br.read(buf)) > 0) {
+                        sb.append(buf, 0, len);
+                    }
+                } else {
+                    Log.e(TAG, "Read introduction file error");
+                    return;
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+                return;
+            } finally {
+                if(in != null) {
+                    try {
+                        // 关闭输入流
+                        in.close();
+                    } catch (IOException e) {
+                        // TODO Auto-generated catch block
+                        e.printStackTrace();
+                    }
+                }
+            }
+
+            // 创建一个空的工作笔记
+            WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER,
+                    AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE,
+                    ResourceParser.RED);
+            // 设置笔记内容
+            note.setWorkingText(sb.toString());
+            if (note.saveNote()) {
+                // 保存介绍笔记成功，更新偏好设置
+                sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit();
+            } else {
+                Log.e(TAG, "Save introduction note error");
+                return;
+            }
+        }
+    }
+
+    /**
+     * 活动开始时调用，启动异步笔记列表查询
+     */
+    @Override
+    protected void onStart() {
+        super.onStart();
+        startAsyncNotesListQuery();
+    }
+
+    /**
+     * 初始化资源，包括视图、适配器、监听器等
+     */
+    private void initResources() {
+        // 获取内容解析器
+        mContentResolver = this.getContentResolver();
+        // 创建后台查询处理器
+        mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
+        // 设置当前文件夹ID为根文件夹ID
+        mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+        // 获取笔记列表视图
+        mNotesListView = (ListView) findViewById(R.id.notes_list);
+        // 添加列表页脚视图
+        mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null),
+                null, false);
+        // 设置列表项点击监听器
+        mNotesListView.setOnItemClickListener(new OnListItemClickListener());
+        // 设置列表项长按监听器
+        mNotesListView.setOnItemLongClickListener(this);
+        // 创建笔记列表适配器
+        mNotesListAdapter = new NotesListAdapter(this);
+        // 设置列表适配器
+        mNotesListView.setAdapter(mNotesListAdapter);
+        // 获取新增笔记按钮
+        mAddNewNote = (Button) findViewById(R.id.btn_new_note);
+        // 设置新增笔记按钮的点击监听器
+        mAddNewNote.setOnClickListener(this);
+        // 设置新增笔记按钮的触摸监听器
+        mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener());
+        // 获取菜单设置按钮
+        mMenuSet = (Button) findViewById(R.id.btn_set);
+        mDispatch = false;
+        mDispatchY = 0;
+        mOriginY = 0;
+        // 获取标题栏TextView
+        mTitleBar = (TextView) findViewById(R.id.tv_title_bar);
+        // 设置初始列表编辑状态
+        mState = ListEditState.NOTE_LIST;
+        // 创建模式回调对象
+        mModeCallBack = new ModeCallback();
+    }
+
+    /**
+     * 模式回调类，处理多选模式和菜单项点击事件
+     */
+    private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
+        // 下拉菜单
+        private DropdownMenu mDropDownMenu;
+        // 动作模式
+        private ActionMode mActionMode;
+        // 菜单
+        private Menu menu;
+        // 移动菜单菜单项
+        private MenuItem mMoveMenu;
+
+        /**
+         * 创建动作模式时调用，初始化菜单和相关设置
+         * @param mode 动作模式
+         * @param menu 菜单
+         * @return 是否创建成功
+         */
+        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            // 加载菜单布局
+            getMenuInflater().inflate(R.menu.note_list_options, menu);
+            this.menu = menu;
+            // 设置删除菜单项的点击监听器
+            menu.findItem(R.id.delete).setOnMenuItemClickListener(this);
+            mMoveMenu = menu.findItem(R.id.move);
+            // 根据当前笔记的父文件夹ID和用户文件夹数量决定移动菜单是否可见
+            if (mFocusNoteDataItem.getParentId() == Notes.ID_CALL_RECORD_FOLDER
+                    || DataUtils.getUserFolderCount(mContentResolver) == 0) {
+                mMoveMenu.setVisible(false);
+            } else {
+                mMoveMenu.setVisible(true);
+                // 设置移动菜单的点击监听器
+                mMoveMenu.setOnMenuItemClickListener(this);
+            }
+            mActionMode = mode;
+            // 设置适配器为选择模式
+            mNotesListAdapter.setChoiceMode(true);
+            // 禁用列表项的长按事件
+            mNotesListView.setLongClickable(false);
+            // 隐藏新增笔记按钮
+            mAddNewNote.setVisibility(View.GONE);
+            // 隐藏菜单设置按钮
+            mMenuSet.setVisibility(View.GONE);
+
+            // 加载自定义视图
+            View customView = LayoutInflater.from(NotesListActivity.this).inflate(
+                    R.layout.note_list_dropdown_menu, null);
+            // 设置动作模式的自定义视图
+            mode.setCustomView(customView);
+            return true;
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListAdapter.java

@@ -0,0 +1,278 @@
+/*
+ * 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.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CursorAdapter;
+
+import net.micode.notes.data.Notes;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+
+/**
+ * NotesListAdapter类继承自CursorAdapter，用于将数据库中的笔记数据绑定到ListView的每个项上，
+ * 同时处理列表项的选择状态、全选、获取选中项等操作。
+ */
+public class NotesListAdapter extends CursorAdapter {
+    private static final String TAG = "NotesListAdapter";
+    // 上下文对象
+    private Context mContext;
+    // 存储列表项的选择状态，键为列表项的位置，值为是否选中
+    private HashMap<Integer, Boolean> mSelectedIndex;
+    // 笔记的数量
+    private int mNotesCount;
+    // 是否处于选择模式
+    private boolean mChoiceMode;
+
+    /**
+     * 存储小部件属性的内部类
+     */
+    public static class AppWidgetAttribute {
+        // 小部件ID
+        public int widgetId;
+        // 小部件类型
+        public int widgetType;
+    };
+
+    /**
+     * 构造函数，初始化适配器
+     * @param context 上下文对象
+     */
+    public NotesListAdapter(Context context) {
+        super(context, null);
+        mSelectedIndex = new HashMap<Integer, Boolean>();
+        mContext = context;
+        mNotesCount = 0;
+    }
+
+    /**
+     * 创建新的列表项视图
+     * @param context 上下文对象
+     * @param cursor 数据库游标
+     * @param parent 父视图
+     * @return 新的列表项视图
+     */
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        return new NotesListItem(context);
+    }
+
+    /**
+     * 将数据绑定到列表项视图上
+     * @param view 列表项视图
+     * @param context 上下文对象
+     * @param cursor 数据库游标
+     */
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        if (view instanceof NotesListItem) {
+            // 创建笔记项数据对象
+            NoteItemData itemData = new NoteItemData(context, cursor);
+            // 将数据绑定到列表项视图上
+            ((NotesListItem) view).bind(context, itemData, mChoiceMode,
+                    isSelectedItem(cursor.getPosition()));
+        }
+    }
+
+    /**
+     * 设置列表项的选择状态
+     * @param position 列表项的位置
+     * @param checked 是否选中
+     */
+    public void setCheckedItem(final int position, final boolean checked) {
+        mSelectedIndex.put(position, checked);
+        // 通知适配器数据发生变化
+        notifyDataSetChanged();
+    }
+
+    /**
+     * 判断是否处于选择模式
+     * @return 如果处于选择模式返回true，否则返回false
+     */
+    public boolean isInChoiceMode() {
+        return mChoiceMode;
+    }
+
+    /**
+     * 设置选择模式
+     * @param mode 是否开启选择模式
+     */
+    public void setChoiceMode(boolean mode) {
+        // 清空选择状态
+        mSelectedIndex.clear();
+        mChoiceMode = mode;
+    }
+
+    /**
+     * 全选或全不选列表项
+     * @param checked 是否全选
+     */
+    public void selectAll(boolean checked) {
+        // 获取数据库游标
+        Cursor cursor = getCursor();
+        for (int i = 0; i < getCount(); i++) {
+            if (cursor.moveToPosition(i)) {
+                // 如果是普通笔记类型，则设置选择状态
+                if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) {
+                    setCheckedItem(i, checked);
+                }
+            }
+        }
+    }
+
+    /**
+     * 获取选中项的ID集合
+     * @return 选中项的ID集合
+     */
+    public HashSet<Long> getSelectedItemIds() {
+        HashSet<Long> itemSet = new HashSet<Long>();
+        for (Integer position : mSelectedIndex.keySet()) {
+            if (mSelectedIndex.get(position) == true) {
+                // 获取列表项的ID
+                Long id = getItemId(position);
+                if (id == Notes.ID_ROOT_FOLDER) {
+                    Log.d(TAG, "Wrong item id, should not happen");
+                } else {
+                    itemSet.add(id);
+                }
+            }
+        }
+
+        return itemSet;
+    }
+
+    /**
+     * 获取选中项的小部件属性集合
+     * @return 选中项的小部件属性集合
+     */
+    public HashSet<AppWidgetAttribute> getSelectedWidget() {
+        HashSet<AppWidgetAttribute> itemSet = new HashSet<AppWidgetAttribute>();
+        for (Integer position : mSelectedIndex.keySet()) {
+            if (mSelectedIndex.get(position) == true) {
+                // 获取列表项对应的游标
+                Cursor c = (Cursor) getItem(position);
+                if (c != null) {
+                    // 创建小部件属性对象
+                    AppWidgetAttribute widget = new AppWidgetAttribute();
+                    // 创建笔记项数据对象
+                    NoteItemData item = new NoteItemData(mContext, c);
+                    // 设置小部件ID
+                    widget.widgetId = item.getWidgetId();
+                    // 设置小部件类型
+                    widget.widgetType = item.getWidgetType();
+                    itemSet.add(widget);
+                    /**
+                     * Don't close cursor here, only the adapter could close it
+                     */
+                } else {
+                    Log.e(TAG, "Invalid cursor");
+                    return null;
+                }
+            }
+        }
+        return itemSet;
+    }
+
+    /**
+     * 获取选中项的数量
+     * @return 选中项的数量
+     */
+    public int getSelectedCount() {
+        // 获取选择状态的集合
+        Collection<Boolean> values = mSelectedIndex.values();
+        if (null == values) {
+            return 0;
+        }
+        // 遍历集合，统计选中项的数量
+        Iterator<Boolean> iter = values.iterator();
+        int count = 0;
+        while (iter.hasNext()) {
+            if (true == iter.next()) {
+                count++;
+            }
+        }
+        return count;
+    }
+
+    /**
+     * 判断是否全选
+     * @return 如果全选返回true，否则返回false
+     */
+    public boolean isAllSelected() {
+        // 获取选中项的数量
+        int checkedCount = getSelectedCount();
+        return (checkedCount != 0 && checkedCount == mNotesCount);
+    }
+
+    /**
+     * 判断指定位置的列表项是否选中
+     * @param position 列表项的位置
+     * @return 如果选中返回true，否则返回false
+     */
+    public boolean isSelectedItem(final int position) {
+        if (null == mSelectedIndex.get(position)) {
+            return false;
+        }
+        return mSelectedIndex.get(position);
+    }
+
+    /**
+     * 当内容发生变化时调用，重新计算笔记数量
+     */
+    @Override
+    protected void onContentChanged() {
+        super.onContentChanged();
+        calcNotesCount();
+    }
+
+    /**
+     * 更换游标时调用，重新计算笔记数量
+     * @param cursor 新的数据库游标
+     */
+    @Override
+    public void changeCursor(Cursor cursor) {
+        super.changeCursor(cursor);
+        calcNotesCount();
+    }
+
+    /**
+     * 计算笔记的数量
+     */
+    private void calcNotesCount() {
+        mNotesCount = 0;
+        for (int i = 0; i < getCount(); i++) {
+            // 获取列表项对应的游标
+            Cursor c = (Cursor) getItem(i);
+            if (c != null) {
+                // 如果是普通笔记类型，则增加笔记数量
+                if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) {
+                    mNotesCount++;
+                }
+            } else {
+                Log.e(TAG, "Invalid cursor");
+                return;
+            }
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListItem.java

@@ -0,0 +1,141 @@
+/*
+ * 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.text.format.DateUtils;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.DataUtils;
+import net.micode.notes.tool.ResourceParser.NoteItemBgResources;
+
+
+/**
+ * 笔记列表项视图
+ */
+public class NotesListItem extends LinearLayout {
+    private ImageView mAlert; // 提醒图标
+    private TextView mTitle; // 标题
+    private TextView mTime; // 时间
+    private TextView mCallName; // 通话记录名称
+    private NoteItemData mItemData; // 笔记数据
+    private CheckBox mCheckBox; // 复选框
+
+    public NotesListItem(Context context) {
+        super(context);
+        // 加载布局
+        inflate(context, R.layout.note_item, this);
+        // 初始化视图
+        mAlert = (ImageView) findViewById(R.id.iv_alert_icon);
+        mTitle = (TextView) findViewById(R.id.tv_title);
+        mTime = (TextView) findViewById(R.id.tv_time);
+        mCallName = (TextView) findViewById(R.id.tv_name);
+        mCheckBox = (CheckBox) findViewById(android.R.id.checkbox);
+    }
+
+    // 绑定数据到视图
+    public void bind(Context context, NoteItemData data, boolean choiceMode, boolean checked) {
+        // 设置复选框可见性
+        if (choiceMode && data.getType() == Notes.TYPE_NOTE) {
+            mCheckBox.setVisibility(View.VISIBLE);
+            mCheckBox.setChecked(checked);
+        } else {
+            mCheckBox.setVisibility(View.GONE);
+        }
+
+        mItemData = data;
+        // 根据笔记类型设置不同显示
+        if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
+            // 通话记录文件夹
+            mCallName.setVisibility(View.GONE);
+            mAlert.setVisibility(View.VISIBLE);
+            mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+            mTitle.setText(context.getString(R.string.call_record_folder_name)
+                    + context.getString(R.string.format_folder_files_count, data.getNotesCount()));
+            mAlert.setImageResource(R.drawable.call_record);
+        } else if (data.getParentId() == Notes.ID_CALL_RECORD_FOLDER) {
+            // 通话记录
+            mCallName.setVisibility(View.VISIBLE);
+            mCallName.setText(data.getCallName());
+            mTitle.setTextAppearance(context,R.style.TextAppearanceSecondaryItem);
+            mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
+            // 设置提醒图标
+            if (data.hasAlert()) {
+                mAlert.setImageResource(R.drawable.clock);
+                mAlert.setVisibility(View.VISIBLE);
+            } else {
+                mAlert.setVisibility(View.GONE);
+            }
+        } else {
+            // 普通笔记或文件夹
+            mCallName.setVisibility(View.GONE);
+            mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+
+            if (data.getType() == Notes.TYPE_FOLDER) {
+                // 文件夹
+                mTitle.setText(data.getSnippet()
+                        + context.getString(R.string.format_folder_files_count,
+                                data.getNotesCount()));
+                mAlert.setVisibility(View.GONE);
+            } else {
+                // 普通笔记
+                mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
+                // 设置提醒图标
+                if (data.hasAlert()) {
+                    mAlert.setImageResource(R.drawable.clock);
+                    mAlert.setVisibility(View.VISIBLE);
+                } else {
+                    mAlert.setVisibility(View.GONE);
+                }
+            }
+        }
+        // 设置相对时间显示
+        mTime.setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate()));
+
+        // 设置背景
+        setBackground(data);
+    }
+
+    // 根据笔记位置设置不同背景
+    private void setBackground(NoteItemData data) {
+        int id = data.getBgColorId();
+        if (data.getType() == Notes.TYPE_NOTE) {
+            if (data.isSingle() || data.isOneFollowingFolder()) {
+                setBackgroundResource(NoteItemBgResources.getNoteBgSingleRes(id));
+            } else if (data.isLast()) {
+                setBackgroundResource(NoteItemBgResources.getNoteBgLastRes(id));
+            } else if (data.isFirst() || data.isMultiFollowingFolder()) {
+                setBackgroundResource(NoteItemBgResources.getNoteBgFirstRes(id));
+            } else {
+                setBackgroundResource(NoteItemBgResources.getNoteBgNormalRes(id));
+            }
+        } else {
+            setBackgroundResource(NoteItemBgResources.getFolderBgRes());
+        }
+    }
+
+    // 获取笔记数据
+    public NoteItemData getItemData() {
+        return mItemData;
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java

@@ -0,0 +1,402 @@
+/*
+ * 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.accounts.Account;
+import android.accounts.AccountManager;
+import android.app.ActionBar;
+import android.app.AlertDialog;
+import android.content.BroadcastReceiver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceCategory;
+import android.text.TextUtils;
+import android.text.format.DateFormat;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.gtask.remote.GTaskSyncService;
+
+
+/**
+ * 笔记应用设置活动
+ */
+public class NotesPreferenceActivity extends PreferenceActivity {
+    // 偏好设置文件名
+    public static final String PREFERENCE_NAME = "notes_preferences";
+    // 同步账户名称键
+    public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
+    // 最后同步时间键
+    public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
+    // 背景颜色键
+    public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear";
+    // 同步账户分类键
+    private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key";
+    // 权限过滤器键
+    private static final String AUTHORITIES_FILTER_KEY = "authorities";
+
+    private PreferenceCategory mAccountCategory; // 账户分类
+    private GTaskReceiver mReceiver; // 同步任务广播接收器
+    private Account[] mOriAccounts; // 原始账户列表
+    private boolean mHasAddedAccount; // 是否添加了新账户
+
+    @Override
+    protected void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        // 启用返回按钮
+        getActionBar().setDisplayHomeAsUpEnabled(true);
+
+        // 从XML加载偏好设置
+        addPreferencesFromResource(R.xml.preferences);
+        mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
+        // 注册同步状态广播接收器
+        mReceiver = new GTaskReceiver();
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
+        registerReceiver(mReceiver, filter);
+
+        mOriAccounts = null;
+        // 添加设置头部视图
+        View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
+        getListView().addHeaderView(header, null, true);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        // 如果用户添加了新账户，自动设置同步账户
+        if (mHasAddedAccount) {
+            Account[] accounts = getGoogleAccounts();
+            if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
+                for (Account accountNew : accounts) {
+                    boolean found = false;
+                    for (Account accountOld : mOriAccounts) {
+                        if (TextUtils.equals(accountOld.name, accountNew.name)) {
+                            found = true;
+                            break;
+                        }
+                    }
+                    if (!found) {
+                        setSyncAccount(accountNew.name);
+                        break;
+                    }
+                }
+            }
+        }
+        refreshUI(); // 刷新UI
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (mReceiver != null) {
+            unregisterReceiver(mReceiver); // 注销广播接收器
+        }
+        super.onDestroy();
+    }
+
+    // 加载账户偏好设置
+    private void loadAccountPreference() {
+        mAccountCategory.removeAll(); // 清除现有项
+
+        Preference accountPref = new Preference(this);
+        final String defaultAccount = getSyncAccountName(this);
+        accountPref.setTitle(getString(R.string.preferences_account_title));
+        accountPref.setSummary(getString(R.string.preferences_account_summary));
+        accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            public boolean onPreferenceClick(Preference preference) {
+                if (!GTaskSyncService.isSyncing()) {
+                    if (TextUtils.isEmpty(defaultAccount)) {
+                        // 首次设置账户
+                        showSelectAccountAlertDialog();
+                    } else {
+                        // 已设置账户，提示风险
+                        showChangeAccountConfirmAlertDialog();
+                    }
+                } else {
+                    Toast.makeText(NotesPreferenceActivity.this,
+                            R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
+                            .show();
+                }
+                return true;
+            }
+        });
+        mAccountCategory.addPreference(accountPref);
+    }
+
+    // 加载同步按钮
+    private void loadSyncButton() {
+        Button syncButton = (Button) findViewById(R.id.preference_sync_button);
+        TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
+
+        // 根据同步状态设置按钮
+        if (GTaskSyncService.isSyncing()) {
+            syncButton.setText(getString(R.string.preferences_button_sync_cancel));
+            syncButton.setOnClickListener(new View.OnClickListener() {
+                public void onClick(View v) {
+                    GTaskSyncService.cancelSync(NotesPreferenceActivity.this);
+                }
+            });
+        } else {
+            syncButton.setText(getString(R.string.preferences_button_sync_immediately));
+            syncButton.setOnClickListener(new View.OnClickListener() {
+                public void onClick(View v) {
+                    GTaskSyncService.startSync(NotesPreferenceActivity.this);
+                }
+            });
+        }
+        syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
+
+        // 设置最后同步时间显示
+        if (GTaskSyncService.isSyncing()) {
+            lastSyncTimeView.setText(GTaskSyncService.getProgressString());
+            lastSyncTimeView.setVisibility(View.VISIBLE);
+        } else {
+            long lastSyncTime = getLastSyncTime(this);
+            if (lastSyncTime != 0) {
+                lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
+                        DateFormat.format(getString(R.string.preferences_last_sync_time_format),
+                                lastSyncTime)));
+                lastSyncTimeView.setVisibility(View.VISIBLE);
+            } else {
+                lastSyncTimeView.setVisibility(View.GONE);
+            }
+        }
+    }
+
+    // 刷新UI
+    private void refreshUI() {
+        loadAccountPreference();
+        loadSyncButton();
+    }
+
+    // 显示选择账户对话框
+    private void showSelectAccountAlertDialog() {
+        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+
+        // 设置自定义标题视图
+        View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
+        TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
+        titleTextView.setText(getString(R.string.preferences_dialog_select_account_title));
+        TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
+        subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips));
+
+        dialogBuilder.setCustomTitle(titleView);
+        dialogBuilder.setPositiveButton(null, null);
+
+        Account[] accounts = getGoogleAccounts();
+        String defAccount = getSyncAccountName(this);
+
+        mOriAccounts = accounts;
+        mHasAddedAccount = false;
+
+        if (accounts.length > 0) {
+            // 创建账户选择列表
+            CharSequence[] items = new CharSequence[accounts.length];
+            final CharSequence[] itemMapping = items;
+            int checkedItem = -1;
+            int index = 0;
+            for (Account account : accounts) {
+                if (TextUtils.equals(account.name, defAccount)) {
+                    checkedItem = index;
+                }
+                items[index++] = account.name;
+            }
+            dialogBuilder.setSingleChoiceItems(items, checkedItem,
+                    new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int which) {
+                            setSyncAccount(itemMapping[which].toString());
+                            dialog.dismiss();
+                            refreshUI();
+                        }
+                    });
+        }
+
+        // 添加"添加账户"视图
+        View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
+        dialogBuilder.setView(addAccountView);
+
+        final AlertDialog dialog = dialogBuilder.show();
+        addAccountView.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                mHasAddedAccount = true;
+                // 启动添加账户设置
+                Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
+                intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] { "gmail-ls" });
+                startActivityForResult(intent, -1);
+                dialog.dismiss();
+            }
+        });
+    }
+
+    // 显示更改账户确认对话框
+    private void showChangeAccountConfirmAlertDialog() {
+        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+
+        // 设置自定义标题视图
+        View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
+        TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
+        titleTextView.setText(getString(R.string.preferences_dialog_change_account_title,
+                getSyncAccountName(this)));
+        TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
+        subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
+        dialogBuilder.setCustomTitle(titleView);
+
+        // 设置操作项
+        CharSequence[] menuItemArray = new CharSequence[] {
+                getString(R.string.preferences_menu_change_account),
+                getString(R.string.preferences_menu_remove_account),
+                getString(R.string.preferences_menu_cancel)
+        };
+        dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int which) {
+                if (which == 0) {
+                    showSelectAccountAlertDialog(); // 更改账户
+                } else if (which == 1) {
+                    removeSyncAccount(); // 移除账户
+                    refreshUI();
+                }
+            }
+        });
+        dialogBuilder.show();
+    }
+
+    // 获取Google账户列表
+    private Account[] getGoogleAccounts() {
+        AccountManager accountManager = AccountManager.get(this);
+        return accountManager.getAccountsByType("com.google");
+    }
+
+    // 设置同步账户
+    private void setSyncAccount(String account) {
+        if (!getSyncAccountName(this).equals(account)) {
+            SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
+            SharedPreferences.Editor editor = settings.edit();
+            if (account != null) {
+                editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
+            } else {
+                editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
+            }
+            editor.commit();
+
+            // 清除最后同步时间
+            setLastSyncTime(this, 0);
+
+            // 清除本地GTask相关信息
+            new Thread(new Runnable() {
+                public void run() {
+                    ContentValues values = new ContentValues();
+                    values.put(NoteColumns.GTASK_ID, "");
+                    values.put(NoteColumns.SYNC_ID, 0);
+                    getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
+                }
+            }).start();
+
+            Toast.makeText(NotesPreferenceActivity.this,
+                    getString(R.string.preferences_toast_success_set_accout, account),
+                    Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    // 移除同步账户
+    private void removeSyncAccount() {
+        SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = settings.edit();
+        if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
+            editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
+        }
+        if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
+            editor.remove(PREFERENCE_LAST_SYNC_TIME);
+        }
+        editor.commit();
+
+        // 清除本地GTask相关信息
+        new Thread(new Runnable() {
+            public void run() {
+                ContentValues values = new ContentValues();
+                values.put(NoteColumns.GTASK_ID, "");
+                values.put(NoteColumns.SYNC_ID, 0);
+                getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
+            }
+        }).start();
+    }
+
+    // 获取同步账户名称
+    public static String getSyncAccountName(Context context) {
+        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
+                Context.MODE_PRIVATE);
+        return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
+    }
+
+    // 设置最后同步时间
+    public static void setLastSyncTime(Context context, long time) {
+        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
+                Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = settings.edit();
+        editor.putLong(PREFERENCE_LAST_SYNC_TIME, time);
+        editor.commit();
+    }
+
+    // 获取最后同步时间
+    public static long getLastSyncTime(Context context) {
+        SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
+                Context.MODE_PRIVATE);
+        return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
+    }
+
+    // 同步任务广播接收器
+    private class GTaskReceiver extends BroadcastReceiver {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            refreshUI(); // 刷新UI
+            // 更新同步状态显示
+            if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
+                TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
+                syncStatus.setText(intent
+                        .getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
+            }
+        }
+    }
+
+    // 选项菜单选择处理
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home: // 返回按钮
+                Intent intent = new Intent(this, NotesListActivity.class);
+                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                startActivity(intent);
+                return true;
+            default:
+                return false;
+        }
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/widget/NoteWidgetProvider.java

@@ -0,0 +1,218 @@
+/*
+ * 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.widget;
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.util.Log;
+import android.widget.RemoteViews;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.tool.ResourceParser;
+import net.micode.notes.ui.NoteEditActivity;
+import net.micode.notes.ui.NotesListActivity;
+
+/**
+ * NoteWidgetProvider 是一个抽象类，继承自 AppWidgetProvider，用于处理便签小部件的相关操作。
+ * 该类提供了小部件删除、更新等功能的实现，同时定义了一些抽象方法，由具体的子类实现。
+ */
+public abstract class NoteWidgetProvider extends AppWidgetProvider {
+    // 定义查询便签信息时使用的投影，指定要查询的列
+    public static final String [] PROJECTION = new String [] {
+        NoteColumns.ID,
+        NoteColumns.BG_COLOR_ID,
+        NoteColumns.SNIPPET
+    };
+
+    // 定义投影中各列的索引，方便后续使用
+    public static final int COLUMN_ID           = 0;
+    public static final int COLUMN_BG_COLOR_ID  = 1;
+    public static final int COLUMN_SNIPPET      = 2;
+
+    // 日志标签，用于在日志中标识该类的输出信息
+    private static final String TAG = "NoteWidgetProvider";
+
+    /**
+     * 当小部件被删除时调用此方法。
+     * 该方法会将被删除小部件对应的便签的 widget_id 字段设置为无效值。
+     *
+     * @param context 上下文对象，用于获取 ContentResolver 进行数据库操作
+     * @param appWidgetIds 被删除的小部件的 ID 数组
+     */
+    @Override
+    public void onDeleted(Context context, int[] appWidgetIds) {
+        // 创建 ContentValues 对象，用于存储要更新的数据
+        ContentValues values = new ContentValues();
+        // 将便签的 widget_id 字段设置为无效值
+        values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
+        // 遍历被删除的小部件 ID 数组
+        for (int i = 0; i < appWidgetIds.length; i++) {
+            // 更新数据库中对应 widget_id 的便签信息
+            context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
+                    values,
+                    NoteColumns.WIDGET_ID + "=?",
+                    new String[] { String.valueOf(appWidgetIds[i])});
+        }
+    }
+
+    /**
+     * 根据小部件 ID 获取便签小部件的信息。
+     * 该方法会查询数据库，获取指定小部件 ID 对应的便签信息。
+     *
+     * @param context 上下文对象，用于获取 ContentResolver 进行数据库查询
+     * @param widgetId 小部件的 ID
+     * @return 返回一个 Cursor 对象，包含查询结果
+     */
+    private Cursor getNoteWidgetInfo(Context context, int widgetId) {
+        return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
+                PROJECTION,
+                NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
+                new String[] { String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER) },
+                null);
+    }
+
+    /**
+     * 更新小部件的信息，不开启隐私模式。
+     * 该方法会调用重载的 update 方法，传入 false 表示不开启隐私模式。
+     *
+     * @param context 上下文对象，用于获取资源和进行数据库操作
+     * @param appWidgetManager 小部件管理器，用于更新小部件的视图
+     * @param appWidgetIds 要更新的小部件的 ID 数组
+     */
+    protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        update(context, appWidgetManager, appWidgetIds, false);
+    }
+
+    /**
+     * 更新小部件的信息，可选择是否开启隐私模式。
+     * 该方法会遍历小部件 ID 数组，根据小部件 ID 查询便签信息，更新小部件的视图。
+     *
+     * @param context 上下文对象，用于获取资源和进行数据库操作
+     * @param appWidgetManager 小部件管理器，用于更新小部件的视图
+     * @param appWidgetIds 要更新的小部件的 ID 数组
+     * @param privacyMode 是否开启隐私模式
+     */
+    private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
+            boolean privacyMode) {
+        // 遍历要更新的小部件 ID 数组
+        for (int i = 0; i < appWidgetIds.length; i++) {
+            // 检查小部件 ID 是否有效
+            if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
+                // 获取默认的背景颜色 ID
+                int bgId = ResourceParser.getDefaultBgId(context);
+                // 初始化便签的摘要信息
+                String snippet = "";
+                // 创建一个 Intent 对象，用于启动便签编辑活动
+                Intent intent = new Intent(context, NoteEditActivity.class);
+                // 设置 Intent 的标志，确保活动以单顶模式启动
+                intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
+                // 将小部件 ID 作为额外信息添加到 Intent 中
+                intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
+                // 将小部件类型作为额外信息添加到 Intent 中
+                intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
+
+                // 根据小部件 ID 查询便签信息
+                Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
+                if (c != null && c.moveToFirst()) {
+                    // 检查查询结果是否包含多个便签，如果是则记录错误信息并关闭 Cursor
+                    if (c.getCount() > 1) {
+                        Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
+                        c.close();
+                        return;
+                    }
+                    // 获取便签的摘要信息
+                    snippet = c.getString(COLUMN_SNIPPET);
+                    // 获取便签的背景颜色 ID
+                    bgId = c.getInt(COLUMN_BG_COLOR_ID);
+                    // 将便签的 ID 作为额外信息添加到 Intent 中
+                    intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
+                    // 设置 Intent 的动作，用于查看便签
+                    intent.setAction(Intent.ACTION_VIEW);
+                } else {
+                    // 如果没有查询到便签信息，设置默认的摘要信息
+                    snippet = context.getResources().getString(R.string.widget_havenot_content);
+                    // 设置 Intent 的动作，用于插入或编辑便签
+                    intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
+                }
+
+                // 关闭 Cursor，释放资源
+                if (c != null) {
+                    c.close();
+                }
+
+                // 创建 RemoteViews 对象，用于更新小部件的视图
+                RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
+                // 设置小部件的背景图片资源
+                rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
+                // 将背景颜色 ID 作为额外信息添加到 Intent 中
+                intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
+
+                /**
+                 * Generate the pending intent to start host for the widget
+                 */
+                PendingIntent pendingIntent = null;
+                if (privacyMode) {
+                    // 如果开启隐私模式，设置小部件的文本为隐私模式提示信息
+                    rv.setTextViewText(R.id.widget_text,
+                            context.getString(R.string.widget_under_visit_mode));
+                    // 创建一个 PendingIntent 对象，用于启动便签列表活动
+                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
+                            context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
+                } else {
+                    // 如果不开启隐私模式，设置小部件的文本为便签的摘要信息
+                    rv.setTextViewText(R.id.widget_text, snippet);
+                    // 创建一个 PendingIntent 对象，用于启动便签编辑活动
+                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
+                            PendingIntent.FLAG_UPDATE_CURRENT);
+                }
+
+                // 设置小部件文本的点击事件，关联 PendingIntent
+                rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
+                // 更新指定 ID 的小部件的视图
+                appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
+            }
+        }
+    }
+
+    /**
+     * 获取背景资源的 ID，由具体的子类实现。
+     *
+     * @param bgId 背景颜色的 ID
+     * @return 返回背景资源的 ID
+     */
+    protected abstract int getBgResourceId(int bgId);
+
+    /**
+     * 获取小部件的布局 ID，由具体的子类实现。
+     *
+     * @return 返回小部件的布局 ID
+     */
+    protected abstract int getLayoutId();
+
+    /**
+     * 获取小部件的类型，由具体的子类实现。
+     *
+     * @return 返回小部件的类型
+     */
+    protected abstract int getWidgetType();
+}

MiNotes-master/app/src/main/java/net/micode/notes/widget/NoteWidgetProvider_2x.java

@@ -0,0 +1,75 @@
+/*
+ * 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.widget;
+
+import android.appwidget.AppWidgetManager;
+import android.content.Context;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.ResourceParser;
+
+/**
+ * NoteWidgetProvider_2x 是 NoteWidgetProvider 的子类，用于处理 2x 大小的便签小部件。
+ * 该类实现了 NoteWidgetProvider 中的抽象方法，提供了 2x 小部件的布局、背景资源和类型信息。
+ */
+public class NoteWidgetProvider_2x extends NoteWidgetProvider {
+    /**
+     * 当小部件需要更新时调用此方法。
+     * 该方法会调用父类的 update 方法，更新 2x 小部件的信息。
+     *
+     * @param context 上下文对象，用于获取资源和进行数据库操作
+     * @param appWidgetManager 小部件管理器，用于更新小部件的视图
+     * @param appWidgetIds 要更新的小部件的 ID 数组
+     */
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        super.update(context, appWidgetManager, appWidgetIds);
+    }
+
+    /**
+     * 获取 2x 小部件的布局 ID。
+     *
+     * @return 返回 2x 小部件的布局 ID
+     */
+    @Override
+    protected int getLayoutId() {
+        return R.layout.widget_2x;
+    }
+
+    /**
+     * 获取 2x 小部件的背景资源 ID。
+     * 该方法会调用 ResourceParser 类的方法，根据背景颜色 ID 获取对应的背景资源 ID。
+     *
+     * @param bgId 背景颜色的 ID
+     * @return 返回 2x 小部件的背景资源 ID
+     */
+    @Override
+    protected int getBgResourceId(int bgId) {
+        return ResourceParser.WidgetBgResources.getWidget2xBgResource(bgId);
+    }
+
+    /**
+     * 获取 2x 小部件的类型。
+     *
+     * @return 返回 2x 小部件的类型
+     */
+    @Override
+    protected int getWidgetType() {
+        return Notes.TYPE_WIDGET_2X;
+    }
+}

MiNotes-master/app/src/main/java/net/micode/notes/widget/NoteWidgetProvider_4x.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.widget;
+
+import android.appwidget.AppWidgetManager;
+import android.content.Context;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.tool.ResourceParser;
+
+/**
+ * NoteWidgetProvider_4x 是 NoteWidgetProvider 的子类，用于处理 4x 大小的便签小部件。
+ * 该类实现了 NoteWidgetProvider 中的抽象方法，提供了 4x 小部件的布局、背景资源和类型信息。
+ */
+public class NoteWidgetProvider_4x extends NoteWidgetProvider {
+    /**
+     * 当小部件需要更新时调用此方法。
+     * 该方法会调用父类的 update 方法，更新 4x 小部件的信息。
+     *
+     * @param context 上下文对象，用于获取资源和进行数据库操作
+     * @param appWidgetManager 小部件管理器，用于更新小部件的视图
+     * @param appWidgetIds 要更新的小部件的 ID 数组
+     */
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        super.update(context, appWidgetManager, appWidgetIds);
+    }
+
+    /**
+     * 获取 4x 小部件的布局 ID。
+     *
+     * @return 返回 4x 小部件的布局 ID
+     */
+    protected int getLayoutId() {
+        return R.layout.widget_4x;
+    }
+
+    /**
+     * 获取 4x 小部件的背景资源 ID。
+     * 该方法会调用 ResourceParser 类的方法，根据背景颜色 ID 获取对应的背景资源 ID。
+     *
+     * @param bgId 背景颜色的 ID
+     * @return 返回 4x 小部件的背景资源 ID
+     */
+    @Override
+    protected int getBgResourceId(int bgId) {
+        return ResourceParser.WidgetBgResources.getWidget4xBgResource(bgId);
+    }
+
+    /**
+     * 获取 4x 小部件的类型。
+     *
+     * @return 返回 4x 小部件的类型
+     */
+    @Override
+    protected int getWidgetType() {
+        return Notes.TYPE_WIDGET_4X;
+    }
+}