diff --git a/README.md b/README.md
deleted file mode 100644
index a6ed909..0000000
--- a/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# note
-
diff --git a/src/BackupUtils.java b/src/BackupUtils.java
new file mode 100644
index 0000000..7c89f71
--- /dev/null
+++ b/src/BackupUtils.java
@@ -0,0 +1,297 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.tool;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.os.Environment;
+import android.text.TextUtils;
+import android.text.format.DateFormat;
+import android.util.Log;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+
+public class BackupUtils {
+    private static final String TAG = "BackupUtils";
+    // 单例模式，确保只有一个BackupUtils实例
+    private static BackupUtils sInstance;
+
+    // 获取BackupUtils的单例实例
+    public static synchronized BackupUtils getInstance(Context context) {
+        if (sInstance == null) {
+            sInstance = new BackupUtils(context);
+        }
+        return sInstance;
+    }
+
+    /**
+     * 备份或恢复状态标识符
+     */
+    // 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;
+    // 数据格式损坏，可能被其他程序修改过
+    public static final int STATE_DATA_DESTROIED               = 2;
+    // 在备份或恢复过程中发生了运行时异常
+    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类
+    private BackupUtils(Context context) {
+        mTextExport = new TextExport(context);
+    }
+
+    // 检查外部存储（SD卡）是否可用
+    private static boolean externalStorageAvailable() {
+        return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
+    }
+
+    // 导出笔记为文本格式
+    public int exportToText() {
+        return mTextExport.exportToText();
+    }
+
+    // 获取导出的文本文件名
+    public String getExportedTextFileName() {
+        return mTextExport.mFileName;
+    }
+
+    // 获取导出的文本文件所在的目录
+    public String getExportedTextFileDir() {
+        return mTextExport.mFileDirectory;
+    }
+
+    // 内部类，用于处理笔记的文本导出
+    private static class TextExport {
+        private static final String[] NOTE_PROJECTION = {
+                NoteColumns.ID,
+                NoteColumns.MODIFIED_DATE,
+                NoteColumns.SNIPPET,
+                NoteColumns.TYPE
+        };
+
+        private static final int NOTE_COLUMN_ID = 0;
+        private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
+        private static final int NOTE_COLUMN_SNIPPET = 2;
+
+        private static final String[] DATA_PROJECTION = {
+                DataColumns.CONTENT,
+                DataColumns.MIME_TYPE,
+                DataColumns.DATA1,
+                DataColumns.DATA2,
+                DataColumns.DATA3,
+                DataColumns.DATA4,
+        };
+
+        private static final int DATA_COLUMN_CONTENT = 0;
+        private static final int DATA_COLUMN_MIME_TYPE = 1;
+        private static final int DATA_COLUMN_CALL_DATE = 2;
+        private static final int DATA_COLUMN_PHONE_NUMBER = 4;
+
+        private final String [] TEXT_FORMAT;
+        private static final int FORMAT_FOLDER_NAME          = 0;
+        private static final int FORMAT_NOTE_DATE            = 1;
+        private static final int FORMAT_NOTE_CONTENT         = 2;
+
+        private Context mContext;
+        private String mFileName;
+        private String mFileDirectory;
+
+        // 构造函数，初始化格式化字符串和上下文
+        public TextExport(Context context) {
+            TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
+            mContext = context;
+            mFileName = "";
+            mFileDirectory = "";
+        }
+
+        // 根据格式ID获取相应的格式化字符串
+        private String getFormat(int id) {
+            return TEXT_FORMAT[id];
+        }
+
+        /**
+         * 将指定文件夹内的笔记导出为文本格式
+         * @param folderId 文件夹的ID
+         * @param ps 输出流，用于写入导出的数据
+         */
+        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))));
+                        // 查询与该笔记相关的数据
+                        String noteId = notesCursor.getString(NOTE_COLUMN_ID);
+                        exportNoteToText(noteId, ps);
+                    } while (notesCursor.moveToNext());
+                }
+                notesCursor.close();
+            }
+        }
+
+        /**
+         * 将指定笔记的内容导出为文本格式
+         * @param noteId 笔记的ID
+         * @param ps 输出流，用于写入导出的数据
+         */
+        private void exportNoteToText(String noteId, PrintStream ps) {
+            // 查询与该笔记相关的数据
+            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)) {
+                            // 导出电话记录相关信息
+                            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));
+                            }
+                            // 打印电话日期
+                            ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), DateFormat
+                                    .format(mContext.getString(R.string.format_datetime_mdhm),
+                                            callDate)));
+                            // 打印电话记录的地点
+                            if (!TextUtils.isEmpty(location)) {
+                                ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
+                                        location));
+                            }
+                        } else if (DataConstants.NOTE.equals(mimeType)) {
+                            // 导出普通笔记内容
+                            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();
+            }
+            // 在每个笔记之间打印一个分隔符
+            try {
+                ps.write(new byte[] {
+                        Character.LINE_SEPARATOR, Character.LETTER_NUMBER
+                });
+            } catch (IOException e) {
+                Log.e(TAG, e.toString());
+            }
+        }
+
+        /**
+         * 将笔记导出为用户可读的文本格式
+         */
+        public int exportToText() {
+            if (!externalStorageAvailable()) {
+                Log.d(TAG, "SD卡未挂载");
+                return STATE_SD_CARD_UNMOUONTED;
+            }
+
+            PrintStream ps = getExportToTextPrintStream();
+            if (ps == null) {
+                Log.e(TAG, "获取输出流失败");
+                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 {
+                        // 打印文件夹的名称
+                        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));
+                            exportFolderToText(folderCursor.getString(NOTE_COLUMN_ID), ps);
+                        }
+                    } while (folderCursor.moveToNext());
+                }
+                folderCursor.close();
+            }
+
+            ps.close();
+            return STATE_SUCCESS;
+        }
+
+        // 获取导出文本的输出流
+        private PrintStream getExportToTextPrintStream() {
+            // 获取文件路径
+            String path = Environment.getExternalStorageDirectory() + "/notesBackup";
+            File dir = new File(path);
+            if (!dir.exists()) {
+                if (!dir.mkdirs()) {
+                    return null;
+                }
+            }
+
+            // 设置输出文件路径
+            mFileName = "NotesBackup_" + System.currentTimeMillis() + ".txt";
+            mFileDirectory = path;
+            File file = new File(path, mFileName);
+
+            try {
+                FileOutputStream fos = new FileOutputStream(file);
+                return new PrintStream(fos);
+            } catch (FileNotFoundException e) {
+                Log.e(TAG, e.toString());
+                return null;
+            }
+        }
+    }
+}
diff --git a/src/DataUtils.java b/src/DataUtils.java
new file mode 100644
index 0000000..72b923e
--- /dev/null
+++ b/src/DataUtils.java
@@ -0,0 +1,311 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.tool;
+
+import android.content.ContentProviderOperation;
+import android.content.ContentProviderResult;
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.OperationApplicationException;
+import android.database.Cursor;
+import android.os.RemoteException;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.CallNote;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+
+public class DataUtils {
+    public static final String TAG = "DataUtils";
+    
+    // 批量删除笔记
+    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
+        if (ids == null) {
+            Log.d(TAG, "the ids is null");
+            return true;
+        }
+        if (ids.size() == 0) {
+            Log.d(TAG, "no id is in the hashset");
+            return true;
+        }
+
+        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+        for (long id : ids) {
+            // 如果是根文件夹，则不允许删除
+            if(id == Notes.ID_ROOT_FOLDER) {
+                Log.e(TAG, "Don't delete system folder root");
+                continue;
+            }
+            // 构建删除操作
+            ContentProviderOperation.Builder builder = ContentProviderOperation
+                    .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+            operationList.add(builder.build());
+        }
+        try {
+            // 执行批量操作
+            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;
+    }
+
+    // 将笔记从一个文件夹移动到另一个文件夹
+    public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
+        ContentValues values = new ContentValues();
+        values.put(NoteColumns.PARENT_ID, desFolderId);  // 设置目标文件夹ID
+        values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);  // 设置原文件夹ID
+        values.put(NoteColumns.LOCAL_MODIFIED, 1);  // 标记为已修改
+        resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
+    }
+
+    // 批量将笔记移动到指定的文件夹
+    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) {
+            // 构建更新操作
+            ContentProviderOperation.Builder builder = ContentProviderOperation
+                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+            builder.withValue(NoteColumns.PARENT_ID, folderId);  // 设置目标文件夹ID
+            builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);  // 标记为已修改
+            operationList.add(builder.build());
+        }
+
+        try {
+            // 执行批量操作
+            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            if (results == null || results.length == 0 || results[0] == null) {
+                Log.d(TAG, "move 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;
+    }
+
+    /**
+     * 获取所有非系统文件夹的数量
+     */
+    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;
+    }
+
+    // 检查指定笔记是否存在并且可见（非回收站）
+    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
+    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
+    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;
+    }
+
+    // 检查文件夹名称是否已存在
+    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;
+    }
+
+    // 获取指定文件夹中的小部件（AppWidget）属性
+    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获取通话记录的电话号码
+    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 "";
+    }
+
+    // 根据电话号和通话日期获取对应的笔记ID
+    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获取摘要
+    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，去除多余的空格和换行
+    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;
+    }
+}
diff --git a/src/GTaskStringUtils.java b/src/GTaskStringUtils.java
new file mode 100644
index 0000000..02a2496
--- /dev/null
+++ b/src/GTaskStringUtils.java
@@ -0,0 +1,76 @@
+/*
+ * 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;
+
+public class GTaskStringUtils {
+
+    // GTASK JSON 数据字段常量
+    public final static String GTASK_JSON_ACTION_ID = "action_id";  // 操作ID
+    public final static String GTASK_JSON_ACTION_LIST = "action_list";  // 操作列表
+    public final static String GTASK_JSON_ACTION_TYPE = "action_type";  // 操作类型
+    public final static String GTASK_JSON_ACTION_TYPE_CREATE = "create";  // 创建操作
+    public final static String GTASK_JSON_ACTION_TYPE_GETALL = "get_all";  // 获取所有操作
+    public final static String GTASK_JSON_ACTION_TYPE_MOVE = "move";  // 移动操作
+    public final static String GTASK_JSON_ACTION_TYPE_UPDATE = "update";  // 更新操作
+    public final static String GTASK_JSON_CREATOR_ID = "creator_id";  // 创建者ID
+    public final static String GTASK_JSON_CHILD_ENTITY = "child_entity";  // 子实体
+    public final static String GTASK_JSON_CLIENT_VERSION = "client_version";  // 客户端版本
+    public final static String GTASK_JSON_COMPLETED = "completed";  // 是否完成
+    public final static String GTASK_JSON_CURRENT_LIST_ID = "current_list_id";  // 当前列表ID
+    public final static String GTASK_JSON_DEFAULT_LIST_ID = "default_list_id";  // 默认列表ID
+    public final static String GTASK_JSON_DELETED = "deleted";  // 是否删除
+    public final static String GTASK_JSON_DEST_LIST = "dest_list";  // 目标列表
+    public final static String GTASK_JSON_DEST_PARENT = "dest_parent";  // 目标父级
+    public final static String GTASK_JSON_DEST_PARENT_TYPE = "dest_parent_type";  // 目标父级类型
+    public final static String GTASK_JSON_ENTITY_DELTA = "entity_delta";  // 实体差异
+    public final static String GTASK_JSON_ENTITY_TYPE = "entity_type";  // 实体类型
+    public final static String GTASK_JSON_GET_DELETED = "get_deleted";  // 获取已删除的
+    public final static String GTASK_JSON_ID = "id";  // ID
+    public final static String GTASK_JSON_INDEX = "index";  // 索引
+    public final static String GTASK_JSON_LAST_MODIFIED = "last_modified";  // 最后修改时间
+    public final static String GTASK_JSON_LATEST_SYNC_POINT = "latest_sync_point";  // 最新同步点
+    public final static String GTASK_JSON_LIST_ID = "list_id";  // 列表ID
+    public final static String GTASK_JSON_LISTS = "lists";  // 列表
+    public final static String GTASK_JSON_NAME = "name";  // 名称
+    public final static String GTASK_JSON_NEW_ID = "new_id";  // 新ID
+    public final static String GTASK_JSON_NOTES = "notes";  // 笔记
+    public final static String GTASK_JSON_PARENT_ID = "parent_id";  // 父级ID
+    public final static String GTASK_JSON_PRIOR_SIBLING_ID = "prior_sibling_id";  // 上一个兄弟ID
+    public final static String GTASK_JSON_RESULTS = "results";  // 结果
+    public final static String GTASK_JSON_SOURCE_LIST = "source_list";  // 源列表
+    public final static String GTASK_JSON_TASKS = "tasks";  // 任务
+    public final static String GTASK_JSON_TYPE = "type";  // 类型
+    public final static String GTASK_JSON_TYPE_GROUP = "GROUP";  // 任务组类型
+    public final static String GTASK_JSON_TYPE_TASK = "TASK";  // 任务类型
+    public final static String GTASK_JSON_USER = "user";  // 用户
+
+    // MIUI 笔记相关文件夹前缀
+    public final static String MIUI_FOLDER_PREFFIX = "[MIUI_Notes]";  // MIUI笔记文件夹前缀
+
+    // 默认文件夹名称
+    public final static String FOLDER_DEFAULT = "Default";  // 默认文件夹
+    public final static String FOLDER_CALL_NOTE = "Call_Note";  // 通话笔记文件夹
+    public final static String FOLDER_META = "METADATA";  // 元数据文件夹
+
+    // 元数据头部字段
+    public final static String META_HEAD_GTASK_ID = "meta_gid";  // GTASK ID
+    public final static String META_HEAD_NOTE = "meta_note";  // 笔记元数据
+    public final static String META_HEAD_DATA = "meta_data";  // 数据元数据
+
+    // 元数据笔记名称，表示不允许更新和删除
+    public final static String META_NOTE_NAME = "[META INFO] DON'T UPDATE AND DELETE";  // 元数据笔记名称
+}
diff --git a/src/Note.java b/src/Note.java
new file mode 100644
index 0000000..6f5e8ba
--- /dev/null
+++ b/src/Note.java
@@ -0,0 +1,265 @@
+/*
+ * 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.model;
+
+import android.content.ContentProviderOperation;
+import android.content.ContentProviderResult;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.OperationApplicationException;
+import android.net.Uri;
+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.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.Notes.TextNote;
+
+import java.util.ArrayList;
+
+
+public class Note {
+    private ContentValues mNoteDiffValues;  // 用于存储笔记修改的数据
+    private NoteData mNoteData;  // 用于存储笔记的具体内容（如文本或通话数据）
+    private static final String TAG = "Note";  // 用于日志输出的标签
+    
+    /**
+     * 创建一个新的笔记ID，用于在数据库中添加新的笔记
+     */
+    public static synchronized long getNewNoteId(Context context, long folderId) {
+        // 创建新的笔记记录
+        ContentValues values = new ContentValues();
+        long createdTime = System.currentTimeMillis();
+        values.put(NoteColumns.CREATED_DATE, createdTime);  // 设置创建时间
+        values.put(NoteColumns.MODIFIED_DATE, createdTime);  // 设置修改时间
+        values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);  // 设置笔记类型
+        values.put(NoteColumns.LOCAL_MODIFIED, 1);  // 设置为本地已修改
+        values.put(NoteColumns.PARENT_ID, folderId);  // 设置笔记所在的文件夹ID
+        
+        // 插入新笔记到数据库，并获取URI
+        Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
+
+        long noteId = 0;
+        try {
+            noteId = Long.valueOf(uri.getPathSegments().get(1));  // 获取新笔记的ID
+        } catch (NumberFormatException e) {
+            Log.e(TAG, "Get note id error :" + e.toString());
+            noteId = 0;
+        }
+        
+        // 如果ID获取失败，抛出异常
+        if (noteId == -1) {
+            throw new IllegalStateException("Wrong note id:" + noteId);
+        }
+        return noteId;  // 返回新创建的笔记ID
+    }
+
+    public Note() {
+        mNoteDiffValues = new ContentValues();  // 初始化笔记修改数据
+        mNoteData = new NoteData();  // 初始化笔记具体内容
+    }
+
+    // 设置笔记的某个键值对
+    public void setNoteValue(String key, String value) {
+        mNoteDiffValues.put(key, value);  // 将键值对放入修改数据中
+        mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);  // 标记本地已修改
+        mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());  // 更新修改时间
+    }
+
+    // 设置文本数据
+    public void setTextData(String key, String value) {
+        mNoteData.setTextData(key, value);  // 将文本数据传递给NoteData对象
+    }
+
+    // 设置文本数据ID
+    public void setTextDataId(long id) {
+        mNoteData.setTextDataId(id);  // 设置文本数据的ID
+    }
+
+    // 获取文本数据ID
+    public long getTextDataId() {
+        return mNoteData.mTextDataId;  // 返回文本数据的ID
+    }
+
+    // 设置通话数据ID
+    public void setCallDataId(long id) {
+        mNoteData.setCallDataId(id);  // 设置通话数据的ID
+    }
+
+    // 设置通话数据
+    public void setCallData(String key, String value) {
+        mNoteData.setCallData(key, value);  // 将通话数据传递给NoteData对象
+    }
+
+    // 判断笔记是否本地已修改
+    public boolean isLocalModified() {
+        return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();  // 如果修改数据不为空或者NoteData已修改，则返回true
+    }
+
+    // 同步笔记数据到ContentProvider
+    public boolean syncNote(Context context, long noteId) {
+        if (noteId <= 0) {
+            throw new IllegalArgumentException("Wrong note id:" + noteId);  // 检查笔记ID是否合法
+        }
+
+        if (!isLocalModified()) {
+            return true;  // 如果没有修改，直接返回
+        }
+
+        // 更新笔记的修改数据
+        if (context.getContentResolver().update(
+                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
+                null) == 0) {
+            Log.e(TAG, "Update note error, should not happen");
+        }
+        mNoteDiffValues.clear();  // 清空修改数据
+
+        // 如果有本地修改的内容，推送到ContentResolver
+        if (mNoteData.isLocalModified()
+                && (mNoteData.pushIntoContentResolver(context, noteId) == null)) {
+            return false;  // 如果推送失败，返回false
+        }
+
+        return true;  // 同步成功，返回true
+    }
+
+    // 内部类：表示笔记的具体内容（文本数据、通话数据）
+    private class NoteData {
+        private long mTextDataId;  // 文本数据的ID
+        private ContentValues mTextDataValues;  // 文本数据的内容
+        private long mCallDataId;  // 通话数据的ID
+        private ContentValues mCallDataValues;  // 通话数据的内容
+
+        private static final String TAG = "NoteData";  // 用于日志输出的标签
+
+        public NoteData() {
+            mTextDataValues = new ContentValues();  // 初始化文本数据
+            mCallDataValues = new ContentValues();  // 初始化通话数据
+            mTextDataId = 0;
+            mCallDataId = 0;
+        }
+
+        // 判断笔记内容是否本地已修改
+        boolean isLocalModified() {
+            return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;  // 如果文本或通话数据有修改，返回true
+        }
+
+        // 设置文本数据的ID
+        void setTextDataId(long id) {
+            if(id <= 0) {
+                throw new IllegalArgumentException("Text data id should larger than 0");  // 检查ID是否合法
+            }
+            mTextDataId = id;  // 设置文本数据ID
+        }
+
+        // 设置通话数据的ID
+        void setCallDataId(long id) {
+            if (id <= 0) {
+                throw new IllegalArgumentException("Call data id should larger than 0");  // 检查ID是否合法
+            }
+            mCallDataId = id;  // 设置通话数据ID
+        }
+
+        // 设置通话数据
+        void setCallData(String key, String value) {
+            mCallDataValues.put(key, value);  // 将通话数据放入ContentValues
+            mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);  // 标记本地已修改
+            mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());  // 更新修改时间
+        }
+
+        // 设置文本数据
+        void setTextData(String key, String value) {
+            mTextDataValues.put(key, value);  // 将文本数据放入ContentValues
+            mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);  // 标记本地已修改
+            mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());  // 更新修改时间
+        }
+
+        // 推送内容到ContentResolver
+        Uri pushIntoContentResolver(Context context, long noteId) {
+            if (noteId <= 0) {
+                throw new IllegalArgumentException("Wrong note id:" + noteId);  // 检查笔记ID是否合法
+            }
+
+            ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();  // 存储所有操作
+            ContentProviderOperation.Builder builder = null;
+
+            // 插入或更新文本数据
+            if(mTextDataValues.size() > 0) {
+                mTextDataValues.put(DataColumns.NOTE_ID, noteId);  // 设置笔记ID
+                if (mTextDataId == 0) {
+                    mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);  // 设置MIME类型
+                    Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI, mTextDataValues);  // 插入数据
+                    try {
+                        setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));  // 获取文本数据ID
+                    } catch (NumberFormatException e) {
+                        Log.e(TAG, "Insert new text data fail with noteId" + noteId);
+                        mTextDataValues.clear();  // 清空数据
+                        return null;
+                    }
+                } else {
+                    builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mTextDataId));  // 更新已有的文本数据
+                    builder.withValues(mTextDataValues);
+                    operationList.add(builder.build());
+                }
+                mTextDataValues.clear();  // 清空文本数据
+            }
+
+            // 插入或更新通话数据
+            if(mCallDataValues.size() > 0) {
+                mCallDataValues.put(DataColumns.NOTE_ID, noteId);  // 设置笔记ID
+                if (mCallDataId == 0) {
+                    mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);  // 设置MIME类型
+                    Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI, mCallDataValues);  // 插入数据
+                    try {
+                        setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));  // 获取通话数据ID
+                    } catch (NumberFormatException e) {
+                        Log.e(TAG, "Insert new call data fail with noteId" + noteId);
+                        mCallDataValues.clear();  // 清空数据
+                        return null;
+                    }
+                } else {
+                    builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mCallDataId));  // 更新已有的通话数据
+                    builder.withValues(mCallDataValues);
+                    operationList.add(builder.build());
+                }
+                mCallDataValues.clear();  // 清空通话数据
+            }
+
+            // 执行所有操作
+            if (operationList.size() > 0) {
+                try {
+                    ContentProviderResult[] results = context.getContentResolver().applyBatch(
+                            Notes.AUTHORITY, operationList);  // 批量执行操作
+                    return (results == null || results.length == 0 || results[0] == null) ? null
+                            : ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);  // 返回URI
+                } catch (RemoteException e) {
+                    Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+                    return null;
+                } catch (OperationApplicationException e) {
+                    Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+                    return null;
+                }
+            }
+            return null;
+        }
+    }
+}
diff --git a/src/ResourceParser.java b/src/ResourceParser.java
new file mode 100644
index 0000000..b07e0fa
--- /dev/null
+++ b/src/ResourceParser.java
@@ -0,0 +1,210 @@
+/*
+ * 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;
+
+public class ResourceParser {
+
+    // 背景颜色的常量定义
+    public static final int YELLOW           = 0;  // 黄色
+    public static final int BLUE             = 1;  // 蓝色
+    public static final int WHITE            = 2;  // 白色
+    public static final int GREEN            = 3;  // 绿色
+    public static final int RED              = 4;  // 红色
+
+    // 默认背景颜色为黄色
+    public static final int BG_DEFAULT_COLOR = YELLOW;
+
+    // 文字大小的常量定义
+    public static final int TEXT_SMALL       = 0;  // 小号文字
+    public static final int TEXT_MEDIUM      = 1;  // 中号文字
+    public static final int TEXT_LARGE       = 2;  // 大号文字
+    public static final int TEXT_SUPER       = 3;  // 超大号文字
+
+    // 默认字体大小为中号
+    public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;
+
+    // 笔记背景资源类
+    public static class NoteBgResources {
+        // 编辑界面的背景资源
+        private final static int [] BG_EDIT_RESOURCES = new int [] {
+            R.drawable.edit_yellow,  // 黄色背景
+            R.drawable.edit_blue,    // 蓝色背景
+            R.drawable.edit_white,   // 白色背景
+            R.drawable.edit_green,   // 绿色背景
+            R.drawable.edit_red      // 红色背景
+        };
+
+        // 编辑界面标题的背景资源
+        private final static int [] BG_EDIT_TITLE_RESOURCES = new int [] {
+            R.drawable.edit_title_yellow,  // 黄色标题背景
+            R.drawable.edit_title_blue,    // 蓝色标题背景
+            R.drawable.edit_title_white,   // 白色标题背景
+            R.drawable.edit_title_green,   // 绿色标题背景
+            R.drawable.edit_title_red      // 红色标题背景
+        };
+
+        // 获取笔记编辑界面的背景资源
+        public static int getNoteBgResource(int id) {
+            return BG_EDIT_RESOURCES[id];
+        }
+
+        // 获取笔记编辑界面标题的背景资源
+        public static int getNoteTitleBgResource(int id) {
+            return BG_EDIT_TITLE_RESOURCES[id];
+        }
+    }
+
+    // 获取默认的背景ID
+    public static int getDefaultBgId(Context context) {
+        // 如果设置了背景颜色，随机选择一个背景颜色，否则使用默认颜色
+        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;
+        }
+    }
+
+    // 笔记条目背景资源类
+    public static class NoteItemBgResources {
+        // 笔记条目第一个的背景资源
+        private final static int [] BG_FIRST_RESOURCES = new int [] {
+            R.drawable.list_yellow_up,  // 黄色条目上方
+            R.drawable.list_blue_up,    // 蓝色条目上方
+            R.drawable.list_white_up,   // 白色条目上方
+            R.drawable.list_green_up,   // 绿色条目上方
+            R.drawable.list_red_up      // 红色条目上方
+        };
+
+        // 笔记条目的正常背景资源
+        private final static int [] BG_NORMAL_RESOURCES = new int [] {
+            R.drawable.list_yellow_middle,  // 黄色条目中间
+            R.drawable.list_blue_middle,    // 蓝色条目中间
+            R.drawable.list_white_middle,   // 白色条目中间
+            R.drawable.list_green_middle,   // 绿色条目中间
+            R.drawable.list_red_middle      // 红色条目中间
+        };
+
+        // 笔记条目最后一个的背景资源
+        private final static int [] BG_LAST_RESOURCES = new int [] {
+            R.drawable.list_yellow_down,   // 黄色条目下方
+            R.drawable.list_blue_down,     // 蓝色条目下方
+            R.drawable.list_white_down,    // 白色条目下方
+            R.drawable.list_green_down,    // 绿色条目下方
+            R.drawable.list_red_down,      // 红色条目下方
+        };
+
+        // 单一条目的背景资源
+        private final static int [] BG_SINGLE_RESOURCES = new int [] {
+            R.drawable.list_yellow_single,  // 黄色单一条目
+            R.drawable.list_blue_single,    // 蓝色单一条目
+            R.drawable.list_white_single,   // 白色单一条目
+            R.drawable.list_green_single,   // 绿色单一条目
+            R.drawable.list_red_single      // 红色单一条目
+        };
+
+        // 获取笔记条目的第一个背景资源
+        public static int getNoteBgFirstRes(int id) {
+            return BG_FIRST_RESOURCES[id];
+        }
+
+        // 获取笔记条目的最后一个背景资源
+        public static int getNoteBgLastRes(int id) {
+            return BG_LAST_RESOURCES[id];
+        }
+
+        // 获取笔记条目的单一背景资源
+        public static int getNoteBgSingleRes(int id) {
+            return BG_SINGLE_RESOURCES[id];
+        }
+
+        // 获取笔记条目的正常背景资源
+        public static int getNoteBgNormalRes(int id) {
+            return BG_NORMAL_RESOURCES[id];
+        }
+
+        // 获取文件夹的背景资源
+        public static int getFolderBgRes() {
+            return R.drawable.list_folder;  // 文件夹背景资源
+        }
+    }
+
+    // 小部件背景资源类
+    public static class WidgetBgResources {
+        // 2x2 小部件的背景资源
+        private final static int [] BG_2X_RESOURCES = new int [] {
+            R.drawable.widget_2x_yellow,  // 黄色背景
+            R.drawable.widget_2x_blue,    // 蓝色背景
+            R.drawable.widget_2x_white,   // 白色背景
+            R.drawable.widget_2x_green,   // 绿色背景
+            R.drawable.widget_2x_red      // 红色背景
+        };
+
+        // 获取 2x2 小部件的背景资源
+        public static int getWidget2xBgResource(int id) {
+            return BG_2X_RESOURCES[id];
+        }
+
+        // 4x4 小部件的背景资源
+        private final static int [] BG_4X_RESOURCES = new int [] {
+            R.drawable.widget_4x_yellow,  // 黄色背景
+            R.drawable.widget_4x_blue,    // 蓝色背景
+            R.drawable.widget_4x_white,   // 白色背景
+            R.drawable.widget_4x_green,   // 绿色背景
+            R.drawable.widget_4x_red      // 红色背景
+        };
+
+        // 获取 4x4 小部件的背景资源
+        public static int getWidget4xBgResource(int id) {
+            return BG_4X_RESOURCES[id];
+        }
+    }
+
+    // 文字外观资源类
+    public static class TextAppearanceResources {
+        // 不同大小的文字外观资源
+        private final static int [] TEXTAPPEARANCE_RESOURCES = new int [] {
+            R.style.TextAppearanceNormal,  // 普通大小文字
+            R.style.TextAppearanceMedium,  // 中号文字
+            R.style.TextAppearanceLarge,   // 大号文字
+            R.style.TextAppearanceSuper    // 超大号文字
+        };
+
+        // 获取文字外观资源
+        public static int getTexAppearanceResource(int id) {
+            /**
+             * HACKME: 修复存储资源ID到共享偏好设置的bug。
+             * 如果ID大于资源数组的长度，返回默认的字体大小。
+             */
+            if (id >= TEXTAPPEARANCE_RESOURCES.length) {
+                return BG_DEFAULT_FONT_SIZE;  // 如果ID超出范围，返回默认的字体大小
+            }
+            return TEXTAPPEARANCE_RESOURCES[id];
+        }
+
+        // 获取文字外观资源的数量
+        public static int getResourcesSize() {
+            return TEXTAPPEARANCE_RESOURCES.length;
+        }
+    }
+}
diff --git a/src/WorkingNote.java b/src/WorkingNote.java
new file mode 100644
index 0000000..e62151e
--- /dev/null
+++ b/src/WorkingNote.java
@@ -0,0 +1,254 @@
+/*
+ * 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.model;
+
+import android.appwidget.AppWidgetManager;
+import android.content.ContentUris;
+import android.content.Context;
+import android.database.Cursor;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.data.Notes;
+import net.micode.notes.data.Notes.CallNote;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.Notes.TextNote;
+import net.micode.notes.tool.ResourceParser.NoteBgResources;
+
+/**
+ * WorkingNote 类处理与笔记相关的工作逻辑。它支持创建新笔记、加载现有笔记、设置笔记内容、
+ * 管理笔记的背景色、提醒时间等，同时支持与小部件的交互。
+ */
+public class WorkingNote {
+    private Note mNote;  // 代表笔记的 Note 对象
+    private long mNoteId;  // 笔记的 ID
+    private String mContent;  // 笔记的内容（文本）
+    private int mMode;  // 笔记的模式（例如：清单模式）
+    private long mAlertDate;  // 提醒时间
+    private long mModifiedDate;  // 最后修改时间
+    private int mBgColorId;  // 背景色 ID
+    private int mWidgetId;  // 小部件 ID
+    private int mWidgetType;  // 小部件类型
+    private long mFolderId;  // 文件夹 ID
+    private Context mContext;  // 上下文
+    private boolean mIsDeleted;  // 是否被标记为已删除
+    private NoteSettingChangedListener mNoteSettingStatusListener;  // 设置变更监听器
+
+    private static final String TAG = "WorkingNote";  // 日志标签
+
+    // 数据查询的列名数组
+    public static final String[] DATA_PROJECTION = new String[] {
+            DataColumns.ID, DataColumns.CONTENT, DataColumns.MIME_TYPE, DataColumns.DATA1, 
+            DataColumns.DATA2, DataColumns.DATA3, DataColumns.DATA4
+    };
+
+    // 笔记数据的查询列名
+    public static final String[] NOTE_PROJECTION = new String[] {
+            NoteColumns.PARENT_ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID, 
+            NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.MODIFIED_DATE
+    };
+
+    // 各列的索引常量
+    private static final int DATA_ID_COLUMN = 0;
+    private static final int DATA_CONTENT_COLUMN = 1;
+    private static final int DATA_MIME_TYPE_COLUMN = 2;
+    private static final int DATA_MODE_COLUMN = 3;
+
+    private static final int NOTE_PARENT_ID_COLUMN = 0;
+    private static final int NOTE_ALERTED_DATE_COLUMN = 1;
+    private static final int NOTE_BG_COLOR_ID_COLUMN = 2;
+    private static final int NOTE_WIDGET_ID_COLUMN = 3;
+    private static final int NOTE_WIDGET_TYPE_COLUMN = 4;
+    private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
+
+    /**
+     * 构造一个新的工作笔记
+     */
+    private WorkingNote(Context context, long folderId) {
+        mContext = context;
+        mAlertDate = 0;
+        mModifiedDate = System.currentTimeMillis();
+        mFolderId = folderId;
+        mNote = new Note();  // 创建一个新的 Note 对象
+        mNoteId = 0;
+        mIsDeleted = false;
+        mMode = 0;
+        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;  // 默认无效的小部件类型
+    }
+
+    /**
+     * 构造一个现有的工作笔记
+     */
+    private WorkingNote(Context context, long noteId, long folderId) {
+        mContext = context;
+        mNoteId = noteId;
+        mFolderId = folderId;
+        mIsDeleted = false;
+        mNote = new Note();
+        loadNote();  // 加载笔记数据
+    }
+
+    /**
+     * 从数据库加载笔记的信息
+     */
+    private void loadNote() {
+        // 从笔记内容 URI 中查询笔记的基本信息
+        Cursor cursor = mContext.getContentResolver().query(
+                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
+                null, null);
+
+        if (cursor != null) {
+            if (cursor.moveToFirst()) {
+                // 获取笔记的基本信息
+                mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
+                mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);
+                mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
+                mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
+                mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
+                mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);
+            }
+            cursor.close();
+        } else {
+            Log.e(TAG, "No note with id:" + mNoteId);
+            throw new IllegalArgumentException("Unable to find note with id " + mNoteId);
+        }
+        loadNoteData();  // 加载笔记的内容数据
+    }
+
+    /**
+     * 加载笔记的具体内容（如文本内容或通话记录等）
+     */
+    private void loadNoteData() {
+        // 查询笔记的数据内容
+        Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
+                DataColumns.NOTE_ID + "=?", new String[] {
+                    String.valueOf(mNoteId)
+                }, null);
+
+        if (cursor != null) {
+            if (cursor.moveToFirst()) {
+                do {
+                    String type = cursor.getString(DATA_MIME_TYPE_COLUMN);
+                    if (DataConstants.NOTE.equals(type)) {
+                        mContent = cursor.getString(DATA_CONTENT_COLUMN);
+                        mMode = cursor.getInt(DATA_MODE_COLUMN);
+                        mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));  // 设置文本数据ID
+                    } else if (DataConstants.CALL_NOTE.equals(type)) {
+                        mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));  // 设置通话数据ID
+                    } else {
+                        Log.d(TAG, "Wrong note type with type:" + type);
+                    }
+                } while (cursor.moveToNext());
+            }
+            cursor.close();
+        } else {
+            Log.e(TAG, "No data with id:" + mNoteId);
+            throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
+        }
+    }
+
+    /**
+     * 创建一个空的工作笔记
+     */
+    public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
+            int widgetType, int defaultBgColorId) {
+        WorkingNote note = new WorkingNote(context, folderId);
+        note.setBgColorId(defaultBgColorId);  // 设置背景色
+        note.setWidgetId(widgetId);  // 设置小部件ID
+        note.setWidgetType(widgetType);  // 设置小部件类型
+        return note;
+    }
+
+    /**
+     * 加载指定ID的工作笔记
+     */
+    public static WorkingNote load(Context context, long id) {
+        return new WorkingNote(context, id, 0);
+    }
+
+    /**
+     * 保存笔记
+     */
+    public synchronized boolean saveNote() {
+        if (isWorthSaving()) {  // 如果笔记值得保存
+            if (!existInDatabase()) {  // 如果笔记不存在数据库
+                if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
+                    Log.e(TAG, "Create new note fail with id:" + mNoteId);
+                    return false;
+                }
+            }
+
+            mNote.syncNote(mContext, mNoteId);  // 同步笔记内容到数据库
+
+            // 如果笔记关联了小部件，更新小部件内容
+            if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
+                    && mWidgetType != Notes.TYPE_WIDGET_INVALIDE
+                    && mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onWidgetChanged();
+            }
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * 判断笔记是否已经存在于数据库
+     */
+    public boolean existInDatabase() {
+        return mNoteId > 0;
+    }
+
+    /**
+     * 判断笔记是否值得保存
+     */
+    private boolean isWorthSaving() {
+        return !(mIsDeleted || (TextUtils.isEmpty(mContent) && !existInDatabase()) 
+                 || (existInDatabase() && !mNote.isLocalModified()));  // 判断笔记是否被删除或没有修改
+    }
+
+    // 其他设置方法（设置提醒时间、背景色、小部件等）
+    public void setAlertDate(long date, boolean set) { ... }
+    public void markDeleted(boolean mark) { ... }
+    public void setBgColorId(int id) { ... }
+    public void setCheckListMode(int mode) { ... }
+    public void setWidgetType(int type) { ... }
+    public void setWidgetId(int id) { ... }
+    public void setWorkingText(String text) { ... }
+
+    // 获取笔记内容、提醒时间、修改时间等信息
+    public String getContent() { return mContent; }
+    public long getAlertDate() { return mAlertDate; }
+    public long getModifiedDate() { return mModifiedDate; }
+    public int getBgColorResId() { return NoteBgResources.getNoteBgResource(mBgColorId); }
+    public int getBgColorId() { return mBgColorId; }
+    public int getCheckListMode() { return mMode; }
+    public long getNoteId() { return mNoteId; }
+    public long getFolderId() { return mFolderId; }
+    public int getWidgetId() { return mWidgetId; }
+    public int getWidgetType() { return mWidgetType; }
+
+    // 设置变更监听接口
+    public interface NoteSettingChangedListener { 
+        void onBackgroundColorChanged();  // 背景色变更时调用
+        void onClockAlertChanged(long date, boolean set);  // 提醒时间变更时调用
+        void onWidgetChanged();  // 小部件变更时调用
+        void onCheckListModeChanged(int oldMode, int newMode);  // 清单模式切换时调用
+    }
+}