diff --git a/111.txt b/111.txt
index 9d07aa0..aad89d3 100644
--- a/111.txt
+++ b/111.txt
@@ -1 +1,2 @@
-111
\ No newline at end of file
+111
+caijiahang
\ No newline at end of file
diff --git a/src/Contact.java b/src/Contact.java
new file mode 100644
index 0000000..580d75c
--- /dev/null
+++ b/src/Contact.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package net.micode.notes.data;
+
+ import android.content.Context;
+ import android.database.Cursor;
+ import android.provider.ContactsContract.CommonDataKinds.Phone;
+ import android.provider.ContactsContract.Data;
+ import android.telephony.PhoneNumberUtils;
+ import android.util.Log;
+ 
+ import java.util.HashMap;
+ 
+ public class Contact {
+     private static HashMap<String, String> sContactCache; // 静态变量，用于缓存联系人信息
+     private static final String TAG = "Contact"; // 日志标签
+ 
+     // 用于查询联系人的SQL选择语句模板，根据电话号码匹配联系人
+     private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+     + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+     + " AND " + Data.RAW_CONTACT_ID + " IN "
+             + "(SELECT raw_contact_id "
+             + " FROM phone_lookup"
+             + " WHERE min_match = '+')";
+ 
+     // 获取联系人信息的静态方法
+     public static String getContact(Context context, String phoneNumber) {
+         // 如果联系人缓存为空，则初始化
+         if(sContactCache == null) {
+             sContactCache = new HashMap<String, String>();
+         }
+ 
+         // 如果缓存中存在该电话号码对应的联系人信息，则直接返回
+         if(sContactCache.containsKey(phoneNumber)) {
+             return sContactCache.get(phoneNumber);
+         }
+ 
+         // 构建SQL选择语句，用于查询指定电话号码的联系人信息
+         String selection = CALLER_ID_SELECTION.replace("+",
+                 PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+         // 查询联系人数据库
+         Cursor cursor = context.getContentResolver().query(
+                 Data.CONTENT_URI,
+                 new String [] { Phone.DISPLAY_NAME },
+                 selection,
+                 new String[] { phoneNumber },
+                 null);
+ 
+         // 如果游标不为空并且移动到第一行，则获取联系人信息
+         if (cursor != null && cursor.moveToFirst()) {
+             try {
+                 String name = cursor.getString(0); // 获取联系人显示名称
+                 sContactCache.put(phoneNumber, name); // 将联系人信息添加到缓存中
+                 return name; // 返回联系人姓名
+             } catch (IndexOutOfBoundsException e) {
+                 Log.e(TAG, " Cursor get string error " + e.toString()); // 记录错误日志
+                 return null; // 返回空
+             } finally {
+                 cursor.close(); // 关闭游标
+             }
+         } else {
+             Log.d(TAG, "No contact matched with number:" + phoneNumber); // 记录日志，未找到匹配的联系人
+             return null; // 返回空
+         }
+     }
+ }
+ 
diff --git a/src/MetaData.java b/src/MetaData.java
new file mode 100644
index 0000000..aa3c27e
--- /dev/null
+++ b/src/MetaData.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package net.micode.notes.gtask.data;
+
+ import android.database.Cursor;
+ import android.util.Log;
+ 
+ import net.micode.notes.tool.GTaskStringUtils;
+ 
+ import org.json.JSONException;
+ import org.json.JSONObject;
+ 
+ 
+ public class MetaData extends Task {
+     private final static String TAG = MetaData.class.getSimpleName();
+ 
+     private String mRelatedGid = null;
+ 
+     // 设置元数据
+     public void setMeta(String gid, JSONObject metaInfo) {
+         try {
+             metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
+         } catch (JSONException e) {
+             Log.e(TAG, "failed to put related gid");
+         }
+         setNotes(metaInfo.toString());
+         setName(GTaskStringUtils.META_NOTE_NAME);
+     }
+ 
+     // 获取相关的GID
+     public String getRelatedGid() {
+         return mRelatedGid;
+     }
+ 
+     @Override
+     public boolean isWorthSaving() {
+         return getNotes() != null;
+     }
+ 
+     @Override
+     public void setContentByRemoteJSON(JSONObject js) {
+         super.setContentByRemoteJSON(js);
+         if (getNotes() != null) {
+             try {
+                 JSONObject metaInfo = new JSONObject(getNotes().trim());
+                 mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
+             } catch (JSONException e) {
+                 Log.w(TAG, "failed to get related gid");
+                 mRelatedGid = null;
+             }
+         }
+     }
+ 
+     @Override
+     public void setContentByLocalJSON(JSONObject js) {
+         // 不应调用此函数
+         throw new IllegalAccessError("MetaData:setContentByLocalJSON 不应该被调用");
+     }
+ 
+     @Override
+     public JSONObject getLocalJSONFromContent() {
+         throw new IllegalAccessError("MetaData:getLocalJSONFromContent 不应该被调用");
+     }
+ 
+     @Override
+     public int getSyncAction(Cursor c) {
+         throw new IllegalAccessError("MetaData:getSyncAction 不应该被调用");
+     }
+ 
+ }
+ 
diff --git a/src/Node.java b/src/Node.java
new file mode 100644
index 0000000..f5dcfe6
--- /dev/null
+++ b/src/Node.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package net.micode.notes.gtask.data;
+
+ import android.database.Cursor;
+ 
+ import org.json.JSONObject;
+ 
+ public abstract class Node {
+     // 同步操作类型
+     public static final int SYNC_ACTION_NONE = 0;
+     public static final int SYNC_ACTION_ADD_REMOTE = 1;
+     public static final int SYNC_ACTION_ADD_LOCAL = 2;
+     public static final int SYNC_ACTION_DEL_REMOTE = 3;
+     public static final int SYNC_ACTION_DEL_LOCAL = 4;
+     public static final int SYNC_ACTION_UPDATE_REMOTE = 5;
+     public static final int SYNC_ACTION_UPDATE_LOCAL = 6;
+     public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;
+     public static final int SYNC_ACTION_ERROR = 8;
+ 
+     private String mGid; // Google 任务 ID
+     private String mName; // 名称
+     private long mLastModified; // 最后修改时间
+     private boolean mDeleted; // 是否已删除
+ 
+     // 构造函数
+     public Node() {
+         mGid = null;
+         mName = "";
+         mLastModified = 0;
+         mDeleted = false;
+     }
+ 
+     // 获取创建操作的 JSON 对象
+     public abstract JSONObject getCreateAction(int actionId);
+ 
+     // 获取更新操作的 JSON 对象
+     public abstract JSONObject getUpdateAction(int actionId);
+ 
+     // 根据远程 JSON 设置内容
+     public abstract void setContentByRemoteJSON(JSONObject js);
+ 
+     // 根据本地 JSON 设置内容
+     public abstract void setContentByLocalJSON(JSONObject js);
+ 
+     // 获取内容的本地 JSON 对象
+     public abstract JSONObject getLocalJSONFromContent();
+ 
+     // 根据游标获取同步操作类型
+     public abstract int getSyncAction(Cursor c);
+ 
+     // 设置 Google 任务 ID
+     public void setGid(String gid) {
+         this.mGid = gid;
+     }
+ 
+     // 设置名称
+     public void setName(String name) {
+         this.mName = name;
+     }
+ 
+     // 设置最后修改时间
+     public void setLastModified(long lastModified) {
+         this.mLastModified = lastModified;
+     }
+ 
+     // 设置是否已删除
+     public void setDeleted(boolean deleted) {
+         this.mDeleted = deleted;
+     }
+ 
+     // 获取 Google 任务 ID
+     public String getGid() {
+         return this.mGid;
+     }
+ 
+     // 获取名称
+     public String getName() {
+         return this.mName;
+     }
+ 
+     // 获取最后修改时间
+     public long getLastModified() {
+         return this.mLastModified;
+     }
+ 
+     // 获取是否已删除
+     public boolean getDeleted() {
+         return this.mDeleted;
+     }
+ }
+ 
diff --git a/src/SqlData.java b/src/SqlData.java
new file mode 100644
index 0000000..a2b0dc8
--- /dev/null
+++ b/src/SqlData.java
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package net.micode.notes.gtask.data;
+
+ import android.content.ContentResolver;
+ import android.content.ContentUris;
+ import android.content.ContentValues;
+ import android.content.Context;
+ import android.database.Cursor;
+ import android.net.Uri;
+ import android.util.Log;
+ 
+ import net.micode.notes.data.Notes;
+ import net.micode.notes.data.Notes.DataColumns;
+ import net.micode.notes.data.Notes.DataConstants;
+ import net.micode.notes.data.Notes.NoteColumns;
+ import net.micode.notes.data.NotesDatabaseHelper.TABLE;
+ import net.micode.notes.gtask.exception.ActionFailureException;
+ 
+ import org.json.JSONException;
+ import org.json.JSONObject;
+ 
+ public class SqlData {
+     private static final String TAG = SqlData.class.getSimpleName();
+ 
+     private static final int INVALID_ID = -99999;
+ 
+     // 数据表的列投影
+     public static final String[] PROJECTION_DATA = new String[] {
+             DataColumns.ID, DataColumns.MIME_TYPE, DataColumns.CONTENT, DataColumns.DATA1,
+             DataColumns.DATA3
+     };
+ 
+     // 列索引
+     public static final int DATA_ID_COLUMN = 0;
+     public static final int DATA_MIME_TYPE_COLUMN = 1;
+     public static final int DATA_CONTENT_COLUMN = 2;
+     public static final int DATA_CONTENT_DATA_1_COLUMN = 3;
+     public static final int DATA_CONTENT_DATA_3_COLUMN = 4;
+ 
+     private ContentResolver mContentResolver;
+     private boolean mIsCreate;
+     private long mDataId;
+     private String mDataMimeType;
+     private String mDataContent;
+     private long mDataContentData1;
+     private String mDataContentData3;
+     private ContentValues mDiffDataValues;
+ 
+     public SqlData(Context context) {
+         mContentResolver = context.getContentResolver();
+         mIsCreate = true;
+         mDataId = INVALID_ID;
+         mDataMimeType = DataConstants.NOTE;
+         mDataContent = "";
+         mDataContentData1 = 0;
+         mDataContentData3 = "";
+         mDiffDataValues = new ContentValues();
+     }
+ 
+     // 根据Cursor初始化SqlData对象
+     public SqlData(Context context, Cursor c) {
+         mContentResolver = context.getContentResolver();
+         mIsCreate = false;
+         loadFromCursor(c);
+         mDiffDataValues = new ContentValues();
+     }
+ 
+     // 从Cursor加载数据到成员变量
+     private void loadFromCursor(Cursor c) {
+         mDataId = c.getLong(DATA_ID_COLUMN);
+         mDataMimeType = c.getString(DATA_MIME_TYPE_COLUMN);
+         mDataContent = c.getString(DATA_CONTENT_COLUMN);
+         mDataContentData1 = c.getLong(DATA_CONTENT_DATA_1_COLUMN);
+         mDataContentData3 = c.getString(DATA_CONTENT_DATA_3_COLUMN);
+     }
+ 
+     // 设置内容，将JSON对象解析为SqlData的成员变量
+     public void setContent(JSONObject js) throws JSONException {
+         long dataId = js.has(DataColumns.ID) ? js.getLong(DataColumns.ID) : INVALID_ID;
+         if (mIsCreate || mDataId != dataId) {
+             mDiffDataValues.put(DataColumns.ID, dataId);
+         }
+         mDataId = dataId;
+ 
+         String dataMimeType = js.has(DataColumns.MIME_TYPE) ? js.getString(DataColumns.MIME_TYPE)
+                 : DataConstants.NOTE;
+         if (mIsCreate || !mDataMimeType.equals(dataMimeType)) {
+             mDiffDataValues.put(DataColumns.MIME_TYPE, dataMimeType);
+         }
+         mDataMimeType = dataMimeType;
+ 
+         String dataContent = js.has(DataColumns.CONTENT) ? js.getString(DataColumns.CONTENT) : "";
+         if (mIsCreate || !mDataContent.equals(dataContent)) {
+             mDiffDataValues.put(DataColumns.CONTENT, dataContent);
+         }
+         mDataContent = dataContent;
+ 
+         long dataContentData1 = js.has(DataColumns.DATA1) ? js.getLong(DataColumns.DATA1) : 0;
+         if (mIsCreate || mDataContentData1 != dataContentData1) {
+             mDiffDataValues.put(DataColumns.DATA1, dataContentData1);
+         }
+         mDataContentData1 = dataContentData1;
+ 
+         String dataContentData3 = js.has(DataColumns.DATA3) ? js.getString(DataColumns.DATA3) : "";
+         if (mIsCreate || !mDataContentData3.equals(dataContentData3)) {
+             mDiffDataValues.put(DataColumns.DATA3, dataContentData3);
+         }
+         mDataContentData3 = dataContentData3;
+     }
+ 
+     // 获取内容，将SqlData的成员变量封装为JSON对象
+     public JSONObject getContent() throws JSONException {
+         if (mIsCreate) {
+             Log.e(TAG, "it seems that we haven't created this in database yet");
+             return null;
+         }
+         JSONObject js = new JSONObject();
+         js.put(DataColumns.ID, mDataId);
+         js.put(DataColumns.MIME_TYPE, mDataMimeType);
+         js.put(DataColumns.CONTENT, mDataContent);
+         js.put(DataColumns.DATA1, mDataContentData1);
+         js.put(DataColumns.DATA3, mDataContentData3);
+         return js;
+     }
+ 
+     // 提交更改
+     public void commit(long noteId, boolean validateVersion, long version) {
+ 
+         if (mIsCreate) {
+             if (mDataId == INVALID_ID && mDiffDataValues.containsKey(DataColumns.ID)) {
+                 mDiffDataValues.remove(DataColumns.ID);
+             }
+ 
+             mDiffDataValues.put(DataColumns.NOTE_ID, noteId);
+             // 将数据插入到内容提供程序中
+             Uri uri = mContentResolver.insert(Notes.CONTENT_DATA_URI, mDiffDataValues);
+             try {
+                 mDataId = Long.valueOf(uri.getPathSegments().get(1));
+             } catch (NumberFormatException e) {
+                 Log.e(TAG, "Get note id error :" + e.toString());
+                 throw new ActionFailureException("create note failed");
+             }
+         } else {
+             if (mDiffDataValues.size() > 0) {
+                 int result = 0;
+                 if (!validateVersion) {
+                     // 直接更新
+                     result = mContentResolver.update(ContentUris.withAppendedId(
+                             Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues, null, null);
+                 } else {
+                     // 验证版本后再更新
+                     result = mContentResolver.update(ContentUris.withAppendedId(
+                             Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues,
+                             " ? in (SELECT " + NoteColumns.ID + " FROM " + TABLE.NOTE
+                                     + " WHERE " + NoteColumns.VERSION + "=?)", new String[] {
+                                     String.valueOf(noteId), String.valueOf(version)
+                             });
+                 }
+                 if (result == 0) {
+                     Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                 }
+             }
+         }
+ 
+         mDiffDataValues.clear();
+         mIsCreate = false;
+     }
+ 
+     // 获取数据ID
+     public long getId() {
+         return mDataId;
+     }
+ }
+ 
diff --git a/src/SqlNote.java b/src/SqlNote.java
new file mode 100644
index 0000000..52ec067
--- /dev/null
+++ b/src/SqlNote.java
@@ -0,0 +1,479 @@
+/*
+ * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package net.micode.notes.gtask.data;
+
+ import android.appwidget.AppWidgetManager;
+ import android.content.ContentResolver;
+ import android.content.ContentValues;
+ import android.content.Context;
+ import android.database.Cursor;
+ import android.net.Uri;
+ import android.util.Log;
+ 
+ import net.micode.notes.data.Notes;
+ import net.micode.notes.data.Notes.DataColumns;
+ import net.micode.notes.data.Notes.NoteColumns;
+ import net.micode.notes.gtask.exception.ActionFailureException;
+ import net.micode.notes.tool.GTaskStringUtils;
+ import net.micode.notes.tool.ResourceParser;
+ 
+ import org.json.JSONArray;
+ import org.json.JSONException;
+ import org.json.JSONObject;
+ 
+ import java.util.ArrayList;
+ 
+ public class SqlNote {
+     private static final String TAG = SqlNote.class.getSimpleName();
+ 
+     private static final int INVALID_ID = -99999;
+ 
+     public static final String[] PROJECTION_NOTE = new String[] {
+             NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
+             NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
+             NoteColumns.NOTES_COUNT, NoteColumns.PARENT_ID, NoteColumns.SNIPPET, NoteColumns.TYPE,
+             NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.SYNC_ID,
+             NoteColumns.LOCAL_MODIFIED, NoteColumns.ORIGIN_PARENT_ID, NoteColumns.GTASK_ID,
+             NoteColumns.VERSION
+     };
+ 
+     // 列索引
+     public static final int ID_COLUMN = 0;
+     public static final int ALERTED_DATE_COLUMN = 1;
+     public static final int BG_COLOR_ID_COLUMN = 2;
+     public static final int CREATED_DATE_COLUMN = 3;
+     public static final int HAS_ATTACHMENT_COLUMN = 4;
+     public static final int MODIFIED_DATE_COLUMN = 5;
+     public static final int NOTES_COUNT_COLUMN = 6;
+     public static final int PARENT_ID_COLUMN = 7;
+     public static final int SNIPPET_COLUMN = 8;
+     public static final int TYPE_COLUMN = 9;
+     public static final int WIDGET_ID_COLUMN = 10;
+     public static final int WIDGET_TYPE_COLUMN = 11;
+     public static final int SYNC_ID_COLUMN = 12;
+     public static final int LOCAL_MODIFIED_COLUMN = 13;
+     public static final int ORIGIN_PARENT_ID_COLUMN = 14;
+     public static final int GTASK_ID_COLUMN = 15;
+     public static final int VERSION_COLUMN = 16;
+ 
+     private Context mContext;
+     private ContentResolver mContentResolver;
+     private boolean mIsCreate;
+     private long mId;
+     private long mAlertDate;
+     private int mBgColorId;
+     private long mCreatedDate;
+     private int mHasAttachment;
+     private long mModifiedDate;
+     private long mParentId;
+     private String mSnippet;
+     private int mType;
+     private int mWidgetId;
+     private int mWidgetType;
+     private long mOriginParent;
+     private long mVersion;
+     private ContentValues mDiffNoteValues;
+     private ArrayList<SqlData> mDataList;
+ 
+     public SqlNote(Context context) {
+         mContext = context;
+         mContentResolver = context.getContentResolver();
+         mIsCreate = true;
+         mId = INVALID_ID;
+         mAlertDate = 0;
+         mBgColorId = ResourceParser.getDefaultBgId(context);
+         mCreatedDate = System.currentTimeMillis();
+         mHasAttachment = 0;
+         mModifiedDate = System.currentTimeMillis();
+         mParentId = 0;
+         mSnippet = "";
+         mType = Notes.TYPE_NOTE;
+         mWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
+         mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
+         mOriginParent = 0;
+         mVersion = 0;
+         mDiffNoteValues = new ContentValues();
+         mDataList = new ArrayList<SqlData>();
+     }
+ 
+     // 通过Cursor初始化SqlNote对象
+     public SqlNote(Context context, Cursor c) {
+         mContext = context;
+         mContentResolver = context.getContentResolver();
+         mIsCreate = false;
+         loadFromCursor(c);
+         mDataList = new ArrayList<SqlData>();
+         if (mType == Notes.TYPE_NOTE)
+             loadDataContent();
+         mDiffNoteValues = new ContentValues();
+     }
+ 
+     // 通过ID初始化SqlNote对象
+     public SqlNote(Context context, long id) {
+         mContext = context;
+         mContentResolver = context.getContentResolver();
+         mIsCreate = false;
+         loadFromCursor(id);
+         mDataList = new ArrayList<SqlData>();
+         if (mType == Notes.TYPE_NOTE)
+             loadDataContent();
+         mDiffNoteValues = new ContentValues();
+     }
+ 
+     // 通过ID从Cursor加载数据到成员变量
+     private void loadFromCursor(long id) {
+         Cursor c = null;
+         try {
+             c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
+                     new String[] {
+                         String.valueOf(id)
+                     }, null);
+             if (c != null) {
+                 c.moveToNext();
+                 loadFromCursor(c);
+             } else {
+                 Log.w(TAG, "loadFromCursor: cursor = null");
+             }
+         } finally {
+             if (c != null)
+                 c.close();
+         }
+     }
+ 
+     // 从Cursor加载数据到成员变量
+     private void loadFromCursor(Cursor c) {
+         mId = c.getLong(ID_COLUMN);
+         mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
+         mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
+         mCreatedDate = c.getLong(CREATED_DATE_COLUMN);
+         mHasAttachment = c.getInt(HAS_ATTACHMENT_COLUMN);
+         mModifiedDate = c.getLong(MODIFIED_DATE_COLUMN);
+         mParentId = c.getLong(PARENT_ID_COLUMN);
+         mSnippet = c.getString(SNIPPET_COLUMN);
+         mType = c.getInt(TYPE_COLUMN);
+         mWidgetId = c.getInt(WIDGET_ID_COLUMN);
+         mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
+         mVersion = c.getLong(VERSION_COLUMN);
+     }
+ 
+     // 加载数据内容
+     private void loadDataContent() {
+         Cursor c = null;
+         mDataList.clear();
+         try {
+             c = mContentResolver.query(Notes.CONTENT_DATA_URI, SqlData.PROJECTION_DATA,
+                     "(note_id=?)", new String[] {
+                         String.valueOf(mId)
+                     }, null);
+             if (c != null) {
+                 if (c.getCount() == 0) {
+                     Log.w(TAG, "it seems that the note has not data");
+                     return;
+                 }
+                 while (c.moveToNext()) {
+                     SqlData data = new SqlData(mContext, c);
+                     mDataList.add(data);
+                 }
+             } else {
+                 Log.w(TAG, "loadDataContent: cursor = null");
+             }
+         } finally {
+             if (c != null)
+                 c.close();
+         }
+     }
+ 
+     // 设置内容，将JSON对象解析为SqlNote的成员变量
+     public boolean setContent(JSONObject js) {
+         try {
+             JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
+             if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_SYSTEM) {
+                 Log.w(TAG, "cannot set system folder");
+             } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_FOLDER) {
+                 // for folder we can only update the snnipet and type
+                 String snippet = note.has(NoteColumns.SNIPPET) ? note
+                         .getString(NoteColumns.SNIPPET) : "";
+                 if (mIsCreate || !mSnippet.equals(snippet)) {
+                     mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+                 }
+                 mSnippet = snippet;
+ 
+                 int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+                         : Notes.TYPE_NOTE;
+                 if (mIsCreate || mType != type) {
+                     mDiffNoteValues.put(NoteColumns.TYPE, type);
+                 }
+                 mType = type;
+             } else if (note.getInt(NoteColumns.TYPE) == Notes.TYPE_NOTE) {
+                 JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
+                 long id = note.has(NoteColumns.ID) ? note.getLong(NoteColumns.ID) : INVALID_ID;
+                 if (mIsCreate || mId != id) {
+                     mDiffNoteValues.put(NoteColumns.ID, id);
+                 }
+                 mId = id;
+ 
+                 long alertDate = note.has(NoteColumns.ALERTED_DATE) ? note
+                         .getLong(NoteColumns.ALERTED_DATE) : 0;
+                 if (mIsCreate || mAlertDate != alertDate) {
+                     mDiffNoteValues.put(NoteColumns.ALERTED_DATE, alertDate);
+                 }
+                 mAlertDate = alertDate;
+ 
+                 int bgColorId = note.has(NoteColumns.BG_COLOR_ID) ? note
+                         .getInt(NoteColumns.BG_COLOR_ID) : ResourceParser.getDefaultBgId(mContext);
+                 if (mIsCreate || mBgColorId != bgColorId) {
+                     mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
+                 }
+                 mBgColorId = bgColorId;
+ 
+                 long createDate = note.has(NoteColumns.CREATED_DATE) ? note
+                         .getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
+                 if (mIsCreate || mCreatedDate != createDate) {
+                     mDiffNoteValues.put(NoteColumns.CREATED_DATE, createDate);
+                 }
+                 mCreatedDate = createDate;
+ 
+                 int hasAttachment = note.has(NoteColumns.HAS_ATTACHMENT) ? note
+                         .getInt(NoteColumns.HAS_ATTACHMENT) : 0;
+                 if (mIsCreate || mHasAttachment != hasAttachment) {
+                     mDiffNoteValues.put(NoteColumns.HAS_ATTACHMENT, hasAttachment);
+                 }
+                 mHasAttachment = hasAttachment;
+ 
+                 long modifiedDate = note.has(NoteColumns.MODIFIED_DATE) ? note
+                         .getLong(NoteColumns.MODIFIED_DATE) : System.currentTimeMillis();
+                 if (mIsCreate || mModifiedDate != modifiedDate) {
+                     mDiffNoteValues.put(NoteColumns.MODIFIED_DATE, modifiedDate);
+                 }
+                 mModifiedDate = modifiedDate;
+ 
+                 long parentId = note.has(NoteColumns.PARENT_ID) ? note
+                         .getLong(NoteColumns.PARENT_ID) : 0;
+                 if (mIsCreate || mParentId != parentId) {
+                     mDiffNoteValues.put(NoteColumns.PARENT_ID, parentId);
+                 }
+                 mParentId = parentId;
+ 
+                 String snippet = note.has(NoteColumns.SNIPPET) ? note
+                         .getString(NoteColumns.SNIPPET) : "";
+                 if (mIsCreate || !mSnippet.equals(snippet)) {
+                     mDiffNoteValues.put(NoteColumns.SNIPPET, snippet);
+                 }
+                 mSnippet = snippet;
+ 
+                 int type = note.has(NoteColumns.TYPE) ? note.getInt(NoteColumns.TYPE)
+                         : Notes.TYPE_NOTE;
+                 if (mIsCreate || mType != type) {
+                     mDiffNoteValues.put(NoteColumns.TYPE, type);
+                 }
+                 mType = type;
+ 
+                 int widgetId = note.has(NoteColumns.WIDGET_ID) ? note.getInt(NoteColumns.WIDGET_ID)
+                         : AppWidgetManager.INVALID_APPWIDGET_ID;
+                 if (mIsCreate || mWidgetId != widgetId) {
+                     mDiffNoteValues.put(NoteColumns.WIDGET_ID, widgetId);
+                 }
+                 mWidgetId = widgetId;
+ 
+                 int widgetType = note.has(NoteColumns.WIDGET_TYPE) ? note
+                         .getInt(NoteColumns.WIDGET_TYPE) : Notes.TYPE_WIDGET_INVALIDE;
+                 if (mIsCreate || mWidgetType != widgetType) {
+                     mDiffNoteValues.put(NoteColumns.WIDGET_TYPE, widgetType);
+                 }
+                 mWidgetType = widgetType;
+ 
+                 long originParent = note.has(NoteColumns.ORIGIN_PARENT_ID) ? note
+                         .getLong(NoteColumns.ORIGIN_PARENT_ID) : 0;
+                 if (mIsCreate || mOriginParent != originParent) {
+                     mDiffNoteValues.put(NoteColumns.ORIGIN_PARENT_ID, originParent);
+                 }
+                 mOriginParent = originParent;
+ 
+                 for (int i = 0; i < dataArray.length(); i++) {
+                     JSONObject data = dataArray.getJSONObject(i);
+                     SqlData sqlData = null;
+                     if (data.has(DataColumns.ID)) {
+                         long dataId = data.getLong(DataColumns.ID);
+                         for (SqlData temp : mDataList) {
+                             if (dataId == temp.getId()) {
+                                 sqlData = temp;
+                             }
+                         }
+                     }
+ 
+                     if (sqlData == null) {
+                         sqlData = new SqlData(mContext);
+                         mDataList.add(sqlData);
+                     }
+ 
+                     sqlData.setContent(data);
+                 }
+             }
+         } catch (JSONException e) {
+             Log.e(TAG, e.toString());
+             e.printStackTrace();
+             return false;
+         }
+         return true;
+     }
+ 
+     // 获取内容，将SqlNote的成员变量封装为JSON对象
+     public JSONObject getContent() {
+         try {
+             JSONObject js = new JSONObject();
+ 
+             if (mIsCreate) {
+                 Log.e(TAG, "it seems that we haven't created this in database yet");
+                 return null;
+             }
+ 
+             JSONObject note = new JSONObject();
+             if (mType == Notes.TYPE_NOTE) {
+                 note.put(NoteColumns.ID, mId);
+                 note.put(NoteColumns.ALERTED_DATE, mAlertDate);
+                 note.put(NoteColumns.BG_COLOR_ID, mBgColorId);
+                 note.put(NoteColumns.CREATED_DATE, mCreatedDate);
+                 note.put(NoteColumns.HAS_ATTACHMENT, mHasAttachment);
+                 note.put(NoteColumns.MODIFIED_DATE, mModifiedDate);
+                 note.put(NoteColumns.PARENT_ID, mParentId);
+                 note.put(NoteColumns.SNIPPET, mSnippet);
+                 note.put(NoteColumns.TYPE, mType);
+                 note.put(NoteColumns.WIDGET_ID, mWidgetId);
+                 note.put(NoteColumns.WIDGET_TYPE, mWidgetType);
+                 note.put(NoteColumns.ORIGIN_PARENT_ID, mOriginParent);
+                 js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+ 
+                 JSONArray dataArray = new JSONArray();
+                 for (SqlData sqlData : mDataList) {
+                     JSONObject data = sqlData.getContent();
+                     if (data != null) {
+                         dataArray.put(data);
+                     }
+                 }
+                 js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
+             } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {
+                 note.put(NoteColumns.ID, mId);
+                 note.put(NoteColumns.TYPE, mType);
+                 note.put(NoteColumns.SNIPPET, mSnippet);
+                 js.put(GTaskStringUtils.META_HEAD_NOTE, note);
+             }
+ 
+             return js;
+         } catch (JSONException e) {
+             Log.e(TAG, e.toString());
+             e.printStackTrace();
+         }
+         return null;
+     }
+ 
+     public void setParentId(long id) {
+         mParentId = id;
+         mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
+     }
+ 
+     public void setGtaskId(String gid) {
+         mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
+     }
+ 
+     public void setSyncId(long syncId) {
+         mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
+     }
+ 
+     public void resetLocalModified() {
+         mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
+     }
+ 
+     public long getId() {
+         return mId;
+     }
+ 
+     public long getParentId() {
+         return mParentId;
+     }
+ 
+     public String getSnippet() {
+         return mSnippet;
+     }
+ 
+     public boolean isNoteType() {
+         return mType == Notes.TYPE_NOTE;
+     }
+ 
+     public void commit(boolean validateVersion) {
+         if (mIsCreate) {
+             if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
+                 mDiffNoteValues.remove(NoteColumns.ID);
+             }
+ 
+             Uri uri = mContentResolver.insert(Notes.CONTENT_NOTE_URI, mDiffNoteValues);
+             try {
+                 mId = Long.valueOf(uri.getPathSegments().get(1));
+             } catch (NumberFormatException e) {
+                 Log.e(TAG, "Get note id error :" + e.toString());
+                 throw new ActionFailureException("create note failed");
+             }
+             if (mId == 0) {
+                 throw new IllegalStateException("Create thread id failed");
+             }
+ 
+             if (mType == Notes.TYPE_NOTE) {
+                 for (SqlData sqlData : mDataList) {
+                     sqlData.commit(mId, false, -1);
+                 }
+             }
+         } else {
+             if (mId <= 0 && mId != Notes.ID_ROOT_FOLDER && mId != Notes.ID_CALL_RECORD_FOLDER) {
+                 Log.e(TAG, "No such note");
+                 throw new IllegalStateException("Try to update note with invalid id");
+             }
+             if (mDiffNoteValues.size() > 0) {
+                 mVersion ++;
+                 int result = 0;
+                 if (!validateVersion) {
+                     result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+                             + NoteColumns.ID + "=?)", new String[] {
+                         String.valueOf(mId)
+                     });
+                 } else {
+                     result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
+                             + NoteColumns.ID + "=?) AND (" + NoteColumns.VERSION + "<=?)",
+                             new String[] {
+                                     String.valueOf(mId), String.valueOf(mVersion)
+                             });
+                 }
+                 if (result == 0) {
+                     Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                 }
+             }
+ 
+             if (mType == Notes.TYPE_NOTE) {
+                 for (SqlData sqlData : mDataList) {
+                     sqlData.commit(mId, validateVersion, mVersion);
+                 }
+             }
+         }
+ 
+         // refresh local info
+         loadFromCursor(mId);
+         if (mType == Notes.TYPE_NOTE)
+             loadDataContent();
+ 
+         mDiffNoteValues.clear();
+         mIsCreate = false;
+     }
+ }
+ 
\ No newline at end of file