diff --git a/doc/庞浩注释的代码/WorkingNote.java b/doc/庞浩注释的代码/WorkingNote.java
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+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.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;
+
+
+public class WorkingNote {
+    // Note for the working note（工作笔记类)
+    private Note mNote;// 笔记
+    // Note Id/笔记ID
+    private long mNoteId;
+    // Note content笔记内容
+    private String mContent;
+    // Note mode笔记模式
+    private int mMode;
+
+    private long mAlertDate;// 提醒日期
+
+    private long mModifiedDate;// 修改日期
+
+    private int mBgColorId;// 背景颜色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 static final String TAG = "WorkingNote";// 标签
+
+    private boolean mIsDeleted;// 是否已删除
+
+    private NoteSettingChangedListener mNoteSettingStatusListener;// 笔记设置改变监听器
+
+    public static final String[] DATA_PROJECTION = new String[] {// 查询数据时需要返回的列名数组
+            DataColumns.ID,// ID列
+            DataColumns.CONTENT, // 内容列
+            DataColumns.MIME_TYPE, // MIME类型列
+            DataColumns.DATA1, // 数据列1
+            DataColumns.DATA2,// 数据列2
+            DataColumns.DATA3, // 数据列3
+            DataColumns.DATA4,// 数据列4
+    };
+
+    public static final String[] NOTE_PROJECTION = new String[] {
+            NoteColumns.PARENT_ID,// 父ID列
+            NoteColumns.ALERTED_DATE,// 提醒日期列
+            NoteColumns.BG_COLOR_ID,// 背景颜色ID列
+            NoteColumns.WIDGET_ID,// 小部件ID列
+            NoteColumns.WIDGET_TYPE,// 小部件类型列
+            NoteColumns.MODIFIED_DATE // 修改日期列
+    };
+
+    private static final int DATA_ID_COLUMN = 0;// 数据表中数据ID列的索引，常量整数值为0
+
+
+    private static final int DATA_CONTENT_COLUMN = 1;  // 数据表中数据内容列的索引，常量整数值为1
+
+
+    private static final int DATA_MIME_TYPE_COLUMN = 2;// 数据表中数据MIME类型列的索引，常量整数值为2
+
+
+    private static final int DATA_MODE_COLUMN = 3; // 数据表中数据模式列的索引，常量整数值为3
+
+
+    private static final int NOTE_PARENT_ID_COLUMN = 0; // 笔记表中笔记父ID列的索引，常量整数值为0
+
+    private static final int NOTE_ALERTED_DATE_COLUMN = 1;// 笔记表中笔记提醒日期列的索引，常量整数值为1
+
+    private static final int NOTE_BG_COLOR_ID_COLUMN = 2;// 笔记表中笔记背景色ID列的索引，常量整数值为2
+
+    private static final int NOTE_WIDGET_ID_COLUMN = 3; // 笔记表中笔记小部件ID列的索引，常量整数值为3
+
+    private static final int NOTE_WIDGET_TYPE_COLUMN = 4;// 笔记表中笔记小部件类型列的索引，常量整数值为4
+
+    private static final int NOTE_MODIFIED_DATE_COLUMN = 5;// 笔记表中笔记修改日期列的索引，常量整数值为5
+
+    // New note construct创建新的笔记构造函数，传入上下文和文件夹ID
+    private WorkingNote(Context context, long folderId) {
+        mContext = context;// 初始化上下文
+        mAlertDate = 0;// 提醒日期设置为0
+        mModifiedDate = System.currentTimeMillis(); // 修改日期设置为当前时间
+        mFolderId = folderId;// 设置文件夹ID
+        mNote = new Note(); // 创建一个新的Note对象
+        mNoteId = 0;// 设置笔记ID为0
+        mIsDeleted = false;// 设置是否已删除为false
+        mMode = 0;// 设置工作模式为0
+        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;// 设置小部件类型为无效类型
+    }
+
+    // Existing note construct加载现有笔记的构造函数，传入上下文、笔记ID和文件夹ID
+    private WorkingNote(Context context, long noteId, long folderId) {
+        mContext = context; // 初始化上下文
+        mNoteId = noteId;// 设置笔记ID
+        mFolderId = folderId;---------------------------// 设置文件夹ID
+        mIsDeleted = false;// 设置是否已删除为false
+        mNote = new Note(); // 创建一个新的Note对象
+        loadNote();// 加载现有笔记
+    }
+
+    private void loadNote() {// 通过笔记ID查询笔记的游标
+        Cursor cursor = mContext.getContentResolver().query(// 通过笔记ID查询笔记的游标
+                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
+                null, null);
+
+        if (cursor != null) {
+            if (cursor.moveToFirst()) {// 从游标中获取笔记的相关信息
+                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 {// 如果找不到笔记，则记录错误日志并抛出异常
+            Log.e(TAG, "No note with id:" + mNoteId);
+            throw new IllegalArgumentException("Unable to find note with id " + mNoteId);
+        }// 加载笔记的数据
+        loadNoteData();
+    }
+
+    private void loadNoteData() {  // 通过笔记ID查询笔记数据的游标
+        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 {// 获取笔记数据的类型
+                    String type = cursor.getString(DATA_MIME_TYPE_COLUMN);
+                    if (DataConstants.NOTE.equals(type)) {// 如果是笔记文本数据，则获取内容和模式，并设置笔记的文本数据ID
+                        mContent = cursor.getString(DATA_CONTENT_COLUMN);
+                        mMode = cursor.getInt(DATA_MODE_COLUMN);
+                        mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));
+                    } else if (DataConstants.CALL_NOTE.equals(type)) {
+                        mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));// 如果是电话笔记数据，则设置笔记的电话数据ID
+                    } else {
+                        Log.d(TAG, "Wrong note type with type:" + type);
+                    }// 如果是其他类型的笔记数据，则记录错误日志
+                } while (cursor.moveToNext());
+            }
+            cursor.close();
+        } else {  // 如果找不到笔记数据，则记录错误日志并抛出异常
+            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);
+        note.setWidgetId(widgetId);
+        note.setWidgetType(widgetType);
+        return note;
+    }
+    // 加载笔记
+    public static WorkingNote load(Context context, long id) {
+        return new WorkingNote(context, id, 0);
+    }
+    // 保存笔记
+    public synchronized boolean saveNote() {
+        if (isWorthSaving()) {
+            if (!existInDatabase()) {// 如果笔记还不存在于数据库中，则为其生成一个新的ID
+                if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
+                    Log.e(TAG, "Create new note fail with id:" + mNoteId);
+                    return false;
+                }
+            }
+            // 将笔记同步到数据库中
+            mNote.syncNote(mContext, mNoteId);
+
+            /**
+             * Update widget content if there exist any widget of this note如果笔记存在小部件，则更新小部件的内容
+             */
+            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中
+    public boolean existInDatabase() {
+        return mNoteId > 0;
+    }
+    // 判断笔记是否值得保存
+    private boolean isWorthSaving() {
+        if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
+                || (existInDatabase() && !mNote.isLocalModified())) {
+            return false;
+        } else {
+            return true;
+        }
+    }
+    // 设置笔记设置状态改变的监听器
+    public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
+        mNoteSettingStatusListener = l;
+    }
+    // 设置提醒日期
+    public void setAlertDate(long date, boolean set) {
+        if (date != mAlertDate) {
+            mAlertDate = date;
+            mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate));
+        }
+        if (mNoteSettingStatusListener != null) {
+            mNoteSettingStatusListener.onClockAlertChanged(date, set);
+        }
+    }
+    // 标记笔记是否被删除
+    public void markDeleted(boolean mark) {
+        mIsDeleted = mark;
+        if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
+                && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onWidgetChanged();
+        }
+    }
+    // 设置笔记的背景颜色
+    public void setBgColorId(int id) {
+        if (id != mBgColorId) {
+            mBgColorId = id;
+            if (mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onBackgroundColorChanged();
+            }
+            mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id));
+        }
+    }
+    // 设置笔记的检查列表模式
+    public void setCheckListMode(int mode) {
+        if (mMode != mode) {
+            if (mNoteSettingStatusListener != null) {
+                mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);
+            }
+            mMode = mode;
+            mNote.setTextData(TextNote.MODE, String.valueOf(mMode));
+        }
+    }
+    // 设置笔记的小部件类型
+    public void setWidgetType(int type) {
+        if (type != mWidgetType) {
+            mWidgetType = type;
+            mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
+        }
+    }
+    // 设置笔记的小部件ID
+    public void setWidgetId(int id) {
+        if (id != mWidgetId) {
+            mWidgetId = id;
+            mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
+        }
+    }
+    //设置文本内容
+    public void setWorkingText(String text) {
+        if (!TextUtils.equals(mContent, text)) {
+            mContent = text;
+            mNote.setTextData(DataColumns.CONTENT, mContent);
+        }
+    }
+    //这是一个将笔记转换为电话记录的方法。它包含电话号码和通话日期，并更新笔记对象的值
+    public void convertToCallNote(String phoneNumber, long callDate) {
+        mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
+        mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
+        mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
+    }
+    //指示笔记是否有闹钟提醒
+    public boolean hasClockAlert() {
+        return (mAlertDate > 0 ? true : false);
+    }
+    // 返回笔记的文本内容
+    public String getContent() {
+        return mContent;
+    }
+    // 返回笔记的警报日期
+    public long getAlertDate() {
+        return mAlertDate;
+    }
+    // 返回笔记的修改日期
+    public long getModifiedDate() {
+        return mModifiedDate;
+    }
+    // 返回笔记的背景颜色资源ID
+    public int getBgColorResId() {
+        return NoteBgResources.getNoteBgResource(mBgColorId);
+    }
+    // 返回笔记的背景颜色ID
+    public int getBgColorId() {
+        return mBgColorId;
+    }
+    // 返回笔记标题的背景颜色资源ID
+    public int getTitleBgResId() {
+        return NoteBgResources.getNoteTitleBgResource(mBgColorId);
+    }
+    // 返回笔记的检查清单模式
+    public int getCheckListMode() {
+        return mMode;
+    }
+    // 返回笔记的ID
+    public long getNoteId() {
+        return mNoteId;
+    }
+    // 返回笔记所在文件夹的ID
+    public long getFolderId() {
+        return mFolderId;
+    }
+    // 返回笔记所属的小部件ID
+    public int getWidgetId() {
+        return mWidgetId;
+    }
+    // 返回笔记所属的小部件类型
+    public int getWidgetType() {
+        return mWidgetType;
+    }
+
+    public interface NoteSettingChangedListener {
+        /**
+         * Called when the background color of current note has just changed
+         */
+        void onBackgroundColorChanged();
+
+        /**
+         * Called when user set clock
+         */
+        void onClockAlertChanged(long date, boolean set);
+
+        /**
+         * Call when user create note from widget
+         */
+        void onWidgetChanged();
+
+        /**
+         * Call when switch between check list mode and normal mode
+         * @param oldMode is previous mode before change
+         * @param newMode is new mode
+         */
+        void onCheckListModeChanged(int oldMode, int newMode);
+    }
+}