gtask.txt

@@ -0,0 +1,649 @@
+/*gtask-data*/
+1、MetaData.java
+package net.micode.notes.gtask.data;
+ 
+public class MetaData extends Task {
+	/*
+	 * 功能描述：得到类的简写名称存入字符串TAG中
+	 * 实现过程：调用getSimpleName ()函数
+	 */
+    private final static String TAG = MetaData.class.getSimpleName();
+    private String mRelatedGid = null;
+    /*
+     * 功能描述：设置数据，即生成元数据库
+     * 实现过程：调用JSONObject库函数put ()，Task类中的setNotes ()和setName ()函数
+     * 参数注解：
+     */
+    public void setMeta(String gid, JSONObject metaInfo) 
+    {
+    	//对函数块进行注释
+        try {
+            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
+            /*
+             * 将这对键值放入metaInfo这个jsonobject对象中
+             */
+        } catch (JSONException e) {
+            Log.e(TAG, "failed to put related gid");
+            /*
+             * 输出错误信息
+             */
+        }
+        setNotes(metaInfo.toString());
+        setName(GTaskStringUtils.META_NOTE_NAME);
+    }
+    /*
+     * 功能描述：获取相关联的Gid
+     */
+    public String getRelatedGid() {
+        return mRelatedGid;
+    }
+    /*
+     * 功能描述：判断当前数据是否为空，若为空则返回真即值得保存
+     * Made By CuiCan
+     */
+    @Override
+    public boolean isWorthSaving() {
+        return getNotes() != null;
+    }
+    /*
+     * 功能描述：使用远程json数据对象设置元数据内容
+     * 实现过程：调用父类Task中的setContentByRemoteJSON ()函数，并
+     * 参数注解： 
+     */
+    @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");
+                /*
+                 * 输出警告信息
+                 */
+                mRelatedGid = null;
+            }
+        }
+    }
+    /*
+     * 功能描述：使用本地json数据对象设置元数据内容，一般不会用到，若用到，则抛出异常
+     * Made By CuiCan
+     */
+    @Override
+    public void setContentByLocalJSON(JSONObject js) {
+        // this function should not be called
+        throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
+        /*
+         * 传递非法参数异常
+         */
+    }
+    /*
+     * 功能描述：从元数据内容中获取本地json对象，一般不会用到，若用到，则抛出异常
+     * Made By CuiCan
+     */
+    @Override
+    public JSONObject getLocalJSONFromContent() {
+        throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
+        /*
+         * 传递非法参数异常
+         * Made By Cui Can
+         */
+    }
+    /*
+     * 功能描述：获取同步动作状态，一般不会用到，若用到，则抛出异常
+     * Made By CuiCan
+     */
+    @Override
+    public int getSyncAction(Cursor c) {
+        throw new IllegalAccessError("MetaData:getSyncAction should not be called");
+        /*
+         * 传递非法参数异常
+         * Made By Cui Can
+         */
+    }
+ 
+}
+1、Node.java
+package net.micode.notes.gtask.data;
+ 
+import android.database.Cursor;
+ 
+import org.json.JSONObject;
+ 
+/**
+ * 应该是同步操作的基础数据类型，定义了相关指示同步操作的常量
+ * 关键字：abstract
+ */
+public abstract class Node {
+	//定义了各种用于表征同步状态的常量
+    public static final int SYNC_ACTION_NONE = 0;// 本地和云端都无可更新内容（即本地和云端内容一致）
+    
+    public static final int SYNC_ACTION_ADD_REMOTE = 1;// 需要在远程云端增加内容
+ 
+    public static final int SYNC_ACTION_ADD_LOCAL = 2;// 需要在本地增加内容
+ 
+    public static final int SYNC_ACTION_DEL_REMOTE = 3;// 需要在远程云端删除内容
+ 
+    public static final int SYNC_ACTION_DEL_LOCAL = 4;// 需要在本地删除内容
+ 
+    public static final int SYNC_ACTION_UPDATE_REMOTE = 5;// 需要将本地内容更新到远程云端
+ 
+    public static final int SYNC_ACTION_UPDATE_LOCAL = 6;// 需要将远程云端内容更新到本地
+ 
+    public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;// 同步出现冲突
+ 
+    public static final int SYNC_ACTION_ERROR = 8;// 同步出现错误
+ 
+    private String mGid;
+ 
+    private String mName;
+ 
+    private long mLastModified;//记录最后一次修改时间
+ 
+    private boolean mDeleted;//表征是否被删除
+ 
+    public Node() {
+        mGid = null;
+        mName = "";
+        mLastModified = 0;
+        mDeleted = false;
+    }
+ 
+    public abstract JSONObject getCreateAction(int actionId);
+ 
+    public abstract JSONObject getUpdateAction(int actionId);
+ 
+    public abstract void setContentByRemoteJSON(JSONObject js);
+ 
+    public abstract void setContentByLocalJSON(JSONObject js);
+ 
+    public abstract JSONObject getLocalJSONFromContent();
+ 
+    public abstract int getSyncAction(Cursor c);
+ 
+    public void setGid(String gid) {
+        this.mGid = gid;
+    }
+ 
+    public void setName(String name) {
+        this.mName = name;
+    }
+ 
+    public void setLastModified(long lastModified) {
+        this.mLastModified = lastModified;
+    }
+ 
+    public void setDeleted(boolean deleted) {
+        this.mDeleted = deleted;
+    }
+ 
+    public String getGid() {
+        return this.mGid;
+    }
+ 
+    public String getName() {
+        return this.mName;
+    }
+ 
+    public long getLastModified() {
+        return this.mLastModified;
+    }
+ 
+    public boolean getDeleted() {
+        return this.mDeleted;
+    }
+ 
+}
+2、SqlData.java
+/*
+ * Description：用于支持小米便签最底层的数据库相关操作，和sqlnote的关系上是子集关系，即data是note的子集（节点）。
+ * SqlData其实就是也就是所谓数据中的数据
+ */
+ 
+package net.micode.notes.gtask.data;
+/*
+ * 功能描述：
+ * 实现过程：
+ * 参数注解： 
+ * Made By CuiCan
+ */
+ 
+public class SqlData {
+	/*
+	 * 功能描述：得到类的简写名称存入字符串TAG中
+	 * 实现过程：调用getSimpleName ()函数
+	 * Made By CuiCan
+	 */
+    private static final String TAG = SqlData.class.getSimpleName();
+ 
+private static final int INVALID_ID = -99999;
+=为mDataId置初始值-99999
+ 
+ 
+    /**
+     * 来自Notes类中定义的DataColumn中的一些常量
+     */
+ 
+    // 集合了interface DataColumns中所有SF常量
+    public static final String[] PROJECTION_DATA = new String[] {
+            DataColumns.ID, DataColumns.MIME_TYPE, DataColumns.CONTENT, DataColumns.DATA1,
+            DataColumns.DATA3
+    };
+ 
+    /**
+     * 以下五个变量作为sql表中5列的编号
+     */
+    public static final int DATA_ID_COLUMN = 0;
+ 
+    public static final int DATA_MIME_TYPE_COLUMN = 1;
+ 
+    public static final int DATA_CONTENT_COLUMN = 2;
+ 
+    public static final int DATA_CONTENT_DATA_1_COLUMN = 3;
+ 
+    public static final int DATA_CONTENT_DATA_3_COLUMN = 4;
+ 
+    private ContentResolver mContentResolver;
+    //判断是否直接用Content生成，是为true，否则为false
+    private boolean mIsCreate;
+ 
+    private long mDataId;
+ 
+    private String mDataMimeType;
+ 
+    private String mDataContent;
+ 
+    private long mDataContentData1;
+ 
+    private String mDataContentData3;
+ 
+    private ContentValues mDiffDataValues;
+ 
+	/*
+	 * 功能描述：构造函数，用于初始化数据
+     * 参数注解：mContentResolver用于获取ContentProvider提供的数据
+     * 参数注解： mIsCreate表征当前数据是用哪种方式创建（两种构造函数的参数不同）
+     * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public SqlData(Context context) {
+        mContentResolver = context.getContentResolver();
+        mIsCreate = true;
+        mDataId = INVALID_ID;//mDataId置初始值-99999
+        mDataMimeType = DataConstants.NOTE;
+        mDataContent = "";
+        mDataContentData1 = 0;
+        mDataContentData3 = "";
+        mDiffDataValues = new ContentValues();
+    }
+ 
+ 
+	/*
+	 * 功能描述：构造函数，初始化数据
+     * 参数注解：mContentResolver用于获取ContentProvider提供的数据
+     * 参数注解： mIsCreate表征当前数据是用哪种方式创建（两种构造函数的参数不同）
+     * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public SqlData(Context context, Cursor c) {
+        mContentResolver = context.getContentResolver();
+        mIsCreate = false;
+        loadFromCursor(c);
+        mDiffDataValues = new ContentValues();
+    }
+ 
+    /*
+     * 功能描述：从光标处加载数据
+     * 从当前的光标处将五列的数据加载到该类的对象
+     * Made By CuiCan
+     */
+    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);
+    }
+ 
+ 
+	/*
+	 * 功能描述：设置用于共享的数据，并提供异常抛出与处理机制
+	 * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public void setContent(JSONObject js) throws JSONException {
+        //如果传入的JSONObject对象中有DataColumns.ID这一项，则设置，否则设为INVALID_ID
+        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;
+    }
+ 
+ 
+	/*
+	 * 功能描述：获取共享的数据内容，并提供异常抛出与处理机制
+	 * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public JSONObject getContent() throws JSONException {
+        if (mIsCreate) {
+            Log.e(TAG, "it seems that we haven't created this in database yet");
+            return null;
+        }
+        //创建JSONObject对象。并将相关数据放入其中，并返回。
+        JSONObject js = new JSONObject();
+        js.put(DataColumns.ID, mDataId);
+        js.put(DataColumns.MIME_TYPE, mDataMimeType);
+        js.put(DataColumns.CONTENT, mDataContent);
+        js.put(DataColumns.DATA1, mDataContentData1);
+        js.put(DataColumns.DATA3, mDataContentData3);
+        return js;
+    }
+ 
+	/*
+	 * 功能描述：commit函数用于把当前造作所做的修改保存到数据库
+	 * 参数注解： 
+	 * Made By CuiCan
+	 */
+    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);
+            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) {
+                    result = mContentResolver.update(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues, null, null);
+                } else {
+                    result = mContentResolver.update(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues,
+                            " ? in (SELECT " + NoteColumns.ID + " FROM " + TABLE.NOTE
+                                    + " WHERE " + NoteColumns.VERSION + "=?)", new String[] {
+                                    String.valueOf(noteId), String.valueOf(version)
+                            });
+                }
+                if (result == 0) {
+                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                }
+            }
+        }
+ 
+        mDiffDataValues.clear();
+        mIsCreate = false;
+    }
+ 
+    /*
+     * 功能描述：获取当前id
+     * 实现过程：
+     * 参数注解： 
+     * Made By CuiCan
+     */
+    public long getId() {
+        return mDataId;
+    }
+}
+3、SqlNote.java
+/*
+ * Description：用于支持小米便签最底层的数据库相关操作，和sqlnote的关系上是子集关系，即data是note的子集（节点）。
+ * SqlData其实就是也就是所谓数据中的数据
+ */
+ 
+package net.micode.notes.gtask.data;
+/*
+ * 功能描述：
+ * 实现过程：
+ * 参数注解： 
+ * Made By CuiCan
+ */
+ 
+public class SqlData {
+	/*
+	 * 功能描述：得到类的简写名称存入字符串TAG中
+	 * 实现过程：调用getSimpleName ()函数
+	 * Made By CuiCan
+	 */
+    private static final String TAG = SqlData.class.getSimpleName();
+ 
+    private static final int INVALID_ID = -99999;//为mDataId置初始值-99999
+ 
+ 
+    /**
+     * 来自Notes类中定义的DataColumn中的一些常量
+     */
+ 
+    // 集合了interface DataColumns中所有SF常量
+    public static final String[] PROJECTION_DATA = new String[] {
+            DataColumns.ID, DataColumns.MIME_TYPE, DataColumns.CONTENT, DataColumns.DATA1,
+            DataColumns.DATA3
+    };
+ 
+    /**
+     * 以下五个变量作为sql表中5列的编号
+     */
+    public static final int DATA_ID_COLUMN = 0;
+ 
+    public static final int DATA_MIME_TYPE_COLUMN = 1;
+ 
+    public static final int DATA_CONTENT_COLUMN = 2;
+ 
+    public static final int DATA_CONTENT_DATA_1_COLUMN = 3;
+ 
+    public static final int DATA_CONTENT_DATA_3_COLUMN = 4;
+ 
+    private ContentResolver mContentResolver;
+    //判断是否直接用Content生成，是为true，否则为false
+    private boolean mIsCreate;
+ 
+    private long mDataId;
+ 
+    private String mDataMimeType;
+ 
+    private String mDataContent;
+ 
+    private long mDataContentData1;
+ 
+    private String mDataContentData3;
+ 
+    private ContentValues mDiffDataValues;
+ 
+	/*
+	 * 功能描述：构造函数，用于初始化数据
+     * 参数注解：mContentResolver用于获取ContentProvider提供的数据
+     * 参数注解： mIsCreate表征当前数据是用哪种方式创建（两种构造函数的参数不同）
+     * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public SqlData(Context context) {
+        mContentResolver = context.getContentResolver();
+        mIsCreate = true;
+        mDataId = INVALID_ID;//mDataId置初始值-99999
+        mDataMimeType = DataConstants.NOTE;
+        mDataContent = "";
+        mDataContentData1 = 0;
+        mDataContentData3 = "";
+        mDiffDataValues = new ContentValues();
+    }
+ 
+ 
+	/*
+	 * 功能描述：构造函数，初始化数据
+     * 参数注解：mContentResolver用于获取ContentProvider提供的数据
+     * 参数注解： mIsCreate表征当前数据是用哪种方式创建（两种构造函数的参数不同）
+     * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public SqlData(Context context, Cursor c) {
+        mContentResolver = context.getContentResolver();
+        mIsCreate = false;
+        loadFromCursor(c);
+        mDiffDataValues = new ContentValues();
+    }
+ 
+    /*
+     * 功能描述：从光标处加载数据
+     * 从当前的光标处将五列的数据加载到该类的对象
+     * Made By CuiCan
+     */
+    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);
+    }
+ 
+ 
+	/*
+	 * 功能描述：设置用于共享的数据，并提供异常抛出与处理机制
+	 * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public void setContent(JSONObject js) throws JSONException {
+        //如果传入的JSONObject对象中有DataColumns.ID这一项，则设置，否则设为INVALID_ID
+        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;
+    }
+ 
+ 
+	/*
+	 * 功能描述：获取共享的数据内容，并提供异常抛出与处理机制
+	 * 参数注解： 
+	 * Made By CuiCan
+	 */
+    public JSONObject getContent() throws JSONException {
+        if (mIsCreate) {
+            Log.e(TAG, "it seems that we haven't created this in database yet");
+            return null;
+        }
+        //创建JSONObject对象。并将相关数据放入其中，并返回。
+        JSONObject js = new JSONObject();
+        js.put(DataColumns.ID, mDataId);
+        js.put(DataColumns.MIME_TYPE, mDataMimeType);
+        js.put(DataColumns.CONTENT, mDataContent);
+        js.put(DataColumns.DATA1, mDataContentData1);
+        js.put(DataColumns.DATA3, mDataContentData3);
+        return js;
+    }
+ 
+	/*
+	 * 功能描述：commit函数用于把当前造作所做的修改保存到数据库
+	 * 参数注解： 
+	 * Made By CuiCan
+	 */
+    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);
+            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) {
+                    result = mContentResolver.update(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues, null, null);
+                } else {
+                    result = mContentResolver.update(ContentUris.withAppendedId(
+                            Notes.CONTENT_DATA_URI, mDataId), mDiffDataValues,
+                            " ? in (SELECT " + NoteColumns.ID + " FROM " + TABLE.NOTE
+                                    + " WHERE " + NoteColumns.VERSION + "=?)", new String[] {
+                                    String.valueOf(noteId), String.valueOf(version)
+                            });
+                }
+                if (result == 0) {
+                    Log.w(TAG, "there is no update. maybe user updates note when syncing");
+                }
+            }
+        }
+ 
+        mDiffDataValues.clear();
+        mIsCreate = false;
+    }
+ 
+    /*
+     * 功能描述：获取当前id
+     * 实现过程：
+     * 参数注解： 
+     * Made By CuiCan
+     */
+    public long getId() {
+        return mDataId;
+    
+                        }
+}

src/data/Contact.txt

@@ -0,0 +1,86 @@
+/*
+ * 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;
+
+// Contact类用于根据电话号码查询对应的联系人姓名
+public class Contact {
+    // 用于缓存电话号码和对应联系人姓名的哈希表
+    private static HashMap<String, String> sContactCache;
+    private static final String TAG = "Contact";
+
+    // 用于查询联系人的SQL选择语句模板，用于匹配电话号码对应的联系人
+    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 = '+')";
+
+    // 根据电话号码获取联系人姓名的静态方法
+    public static String getContact(Context context, String phoneNumber) {
+        // 如果缓存为空，初始化缓存哈希表
+        if (sContactCache == null) {
+            sContactCache = new HashMap<String, String>();
+        }
+
+        // 如果缓存中已经存在该电话号码对应的联系人姓名，直接返回
+        if (sContactCache.containsKey(phoneNumber)) {
+            return sContactCache.get(phoneNumber);
+        }
+
+        // 替换SQL选择语句中的占位符，生成实际用于查询的语句
+        String selection = CALLER_ID_SELECTION.replace("+",
+                PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+        // 通过内容解析器执行查询操作
+        Cursor cursor = context.getContentResolver().query(
+                Data.CONTENT_URI,
+                new String[]{Phone.DISPLAY_NAME},
+                selection,
+                new String[]{phoneNumber},
+                null);
+
+        if (cursor!= null && cursor.moveToFirst()) {
+            try {
+                // 从查询结果中获取联系人姓名
+                String name = cursor.getString(0);
+                // 将联系人姓名存入缓存
+                sContactCache.put(phoneNumber, name);
+                return name;
+            } catch (IndexOutOfBoundsException e) {
+                // 捕获索引越界异常，打印错误日志
+                Log.e(TAG, " Cursor get string error " + e.toString());
+                return null;
+            } finally {
+                // 关闭游标，释放资源
+                cursor.close();
+            }
+        } else {
+            // 如果没有匹配的联系人，打印调试日志
+            Log.d(TAG, "No contact matched with number:" + phoneNumber);
+            return null;
+        }
+    }
+}

src/data/Notes.txt

@@ -0,0 +1,259 @@
+/*
+ * 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文件 except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.net.Uri;
+
+// Notes类定义了一系列与笔记应用相关的常量和接口，用于管理笔记、文件夹以及相关的数据结构
+public class Notes {
+    // 内容提供器的授权，用于标识该应用的数据来源
+    public static final String AUTHORITY = "micode_notes";
+    // 日志标签，方便调试输出
+    public static final String TAG = "Notes";
+    // 定义笔记类型：普通笔记
+    public static final int TYPE_NOTE = 0;
+    // 定义笔记类型：文件夹
+    public static final int TYPE_FOLDER = 1;
+    // 定义笔记类型：系统相关
+    public static final int TYPE_SYSTEM = 2;
+
+    /**
+     * 以下ID是系统文件夹的标识符
+     * {@link Notes#ID_ROOT_FOLDER } 是默认文件夹
+     * {@link Notes#ID_TEMPARAY_FOLDER } 用于存放无所属文件夹的笔记
+     * {@link Notes#ID_CALL_RECORD_FOLDER} 用于存储通话记录
+     */
+    public static final int ID_ROOT_FOLDER = 0;
+    public static final int ID_TEMPARAY_FOLDER = -1;
+    public static final int ID_CALL_RECORD_FOLDER = -2;
+    public static final int ID_TRASH_FOLER = -3;
+
+    // 用于在Intent中传递提醒日期的额外数据键
+    public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
+    // 用于在Intent中传递背景颜色ID的额外数据键
+    public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
+    // 用于在Intent中传递小部件ID的额外数据键
+    public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
+    // 用于在Intent中传递小部件类型的额外数据键
+    public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
+    // 用于在Intent中传递文件夹ID的额外数据键
+    public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
+    // 用于在Intent中传递通话日期的额外数据键
+    public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
+
+    // 定义无效的小部件类型
+    public static final int TYPE_WIDGET_INVALIDE = -1;
+    // 定义一种小部件类型，可能对应2x尺寸
+    public static final int TYPE_WIDGET_2X = 0;
+    // 定义一种小部件类型，可能对应4x尺寸
+    public static final int TYPE_WIDGET_4X = 1;
+
+    // DataConstants内部类，用于定义数据相关的常量
+    public static class DataConstants {
+        // 文本笔记的内容项类型
+        public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
+        // 通话笔记的内容项类型
+        public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
+    }
+
+    /**
+     * 用于查询所有笔记和文件夹的Uri
+     */
+    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+    /**
+     * 用于查询数据的Uri
+     */
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+
+    // NoteColumns接口定义了笔记表中的列名及其对应的数据类型
+    public interface NoteColumns {
+        /**
+         * 行的唯一ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String ID = "_id";
+        /**
+         * 笔记或文件夹的父ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String PARENT_ID = "parent_id";
+        /**
+         * 笔记或文件夹的创建日期
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String CREATED_DATE = "created_date";
+        /**
+         * 最近修改日期
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String MODIFIED_DATE = "modified_date";
+        /**
+         * 提醒日期
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String ALERTED_DATE = "alert_date";
+        /**
+         * 文件夹名称或笔记的文本内容
+         * <P> 类型: TEXT </P>
+         */
+        public static final String SNIPPET = "snippet";
+        /**
+         * 笔记的小部件ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String WIDGET_ID = "widget_id";
+        /**
+         * 笔记的小部件类型
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String WIDGET_TYPE = "widget_type";
+        /**
+         * 笔记的背景颜色ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String BG_COLOR_ID = "bg_color_id";
+        /**
+         * 对于文本笔记，无附件；对于多媒体笔记，至少有一个附件
+         * <P> 类型: INTEGER </P>
+        */
+        public static final String HAS_ATTACHMENT = "has_attachment";
+        /**
+         * 文件夹中的笔记数量
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String NOTES_COUNT = "notes_count";
+        /**
+         * 文件类型：文件夹或笔记
+         * <P> 类型: INTEGER </P>
+         */
+        public static final String TYPE = "type";
+        /**
+         * 最后同步ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String SYNC_ID = "sync_id";
+        /**
+         * 标记是否本地修改
+         * <P> 类型: INTEGER </P>
+         */
+        public static final String LOCAL_MODIFIED = "local_modified";
+        /**
+         * 移动到临时文件夹之前的原始父ID
+         * <P> 类型 : INTEGER </P>
+         */
+        public static final String ORIGIN_PARENT_ID = "origin_parent_id";
+        /**
+         * Google任务的ID
+         * <P> 类型 : TEXT </P>
+         */
+        public static final String GTASK_ID = "gtask_id";
+        /**
+         * 版本代码
+         * <P> 类型 : INTEGER (long) </P>
+         */
+        public static final String VERSION = "version";
+    }
+
+    // DataColumns接口定义了数据表中的列名及其对应的数据类型
+    public interface DataColumns {
+        /**
+         * 行的唯一ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String ID = "_id";
+        /**
+         * 此行所代表项目的MIME类型
+         * <P> 类型: Text </P>
+         */
+        public static final String MIME_TYPE = "mime_type";
+        /**
+         * 此数据所属笔记的引用ID
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String NOTE_ID = "note_id";
+        /**
+         * 笔记或文件夹的创建日期
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String CREATED_DATE = "created_date";
+        /**
+         * 最近修改日期
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String MODIFIED_DATE = "modified_date";
+        /**
+         * 数据的内容
+         * <P> 类型: TEXT </P>
+         */
+        public static final String CONTENT = "content";
+        /**
+         * 通用数据列，含义根据{@link #MIMETYPE}而定，用于整数数据类型
+         * <P> 类型: INTEGER </P>
+         */
+        public static final String DATA1 = "data1";
+        /**
+         * 通用数据列，含义根据{@link #MIMETYPE}而定，用于整数数据类型
+         * <P> 类型: INTEGER </P>
+         */
+        public static final String DATA2 = "data2";
+        /**
+         * 通用数据列，含义根据{@link #MIMETYPE}而定，用于文本数据类型
+         * <P> 类型: TEXT </P>
+         */
+        public static final String DATA3 = "data3";
+        /**
+         * 通用数据列，含义根据{@link #MIMETYPE}而定，用于文本数据类型
+         * <P> 类型: TEXT </P>
+         */
+        public static final String DATA4 = "data4";
+        /**
+         * 通用数据列，含义根据{@link #MIMETYPE}而定，用于文本数据类型
+         * <P> 类型: TEXT </P>
+         */
+        public static final String DATA5 = "data5";
+    }
+
+    // TextNote类，继承DataColumns接口，可能用于文本笔记相关的数据操作
+    public static final class TextNote implements DataColumns {
+        /**
+         * 模式，用于指示文本是否处于清单模式
+         * <P> 类型: Integer 1:清单模式 0: 普通模式 </P>
+         */
+        public static final String MODE = DATA1;
+        public static final int MODE_CHECK_LIST = 1;
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
+    }
+
+    // CallNote类，继承DataColumns接口，可能用于通话笔记相关的数据操作
+    public static final class CallNote implements DataColumns {
+        /**
+         * 此次通话记录的通话日期
+         * <P> 类型: INTEGER (long) </P>
+         */
+        public static final String CALL_DATE = DATA1;
+        /**
+         * 此次通话记录的电话号码
+         * <P> 类型: TEXT </P>
+         */
+        public static final String PHONE_NUMBER = DATA3;
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
+    }
+}

src/data/NotesDatabaseHelper.txt

@@ -0,0 +1,393 @@
+/*
+ * 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文件 except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.DataConstants;
+import net.micode.notes.data.Notes.NoteColumns;
+
+// NotesDatabaseHelper类用于管理笔记应用的SQLite数据库，负责数据库的创建、升级以及相关表和触发器的初始化
+public class NotesDatabaseHelper extends SQLiteOpenHelper {
+    // 数据库名称
+    private static final String DB_NAME = "note.db";
+    // 数据库版本号
+    private static final int DB_VERSION = 4;
+
+    // 内部接口，定义表名常量
+    public interface TABLE {
+        public static final String NOTE = "note";
+        public static final String DATA = "data";
+    }
+
+    private static final String TAG = "NotesDatabaseHelper";
+    // 单例实例
+    private static NotesDatabaseHelper mInstance;
+
+    // 创建笔记表的SQL语句
+    private static final String CREATE_NOTE_TABLE_SQL =
+        "CREATE TABLE " + TABLE.NOTE + "(" +
+            NoteColumns.ID + " INTEGER PRIMARY KEY," +
+            NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
+            NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
+            NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
+            NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
+        ")";
+
+    // 创建数据表的SQL语句
+    private static final String CREATE_DATA_TABLE_SQL =
+        "CREATE TABLE " + TABLE.DATA + "(" +
+            DataColumns.ID + " INTEGER PRIMARY KEY," +
+            DataColumns.MIME_TYPE + " TEXT NOT NULL," +
+            DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
+            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+            DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
+            DataColumns.DATA1 + " INTEGER," +
+            DataColumns.DATA2 + " INTEGER," +
+            DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
+            DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
+            DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
+        ")";
+
+    // 创建数据表里note_id索引的SQL语句
+    private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
+        "CREATE INDEX IF NOT EXISTS note_id_index ON " +
+        TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
+
+    /**
+     * 当把笔记移动到文件夹时，增加该文件夹的笔记数量的触发器SQL语句
+     */
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+        "CREATE TRIGGER increase_folder_count_on_update "+
+        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+        " END";
+
+    /**
+     * 当把笔记从文件夹移出时，减少该文件夹的笔记数量的触发器SQL语句
+     */
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+        "CREATE TRIGGER decrease_folder_count_on_update " +
+        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+        "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
+        " END";
+
+    /**
+     * 当在文件夹中插入新笔记时，增加该文件夹的笔记数量的触发器SQL语句
+     */
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
+        "CREATE TRIGGER increase_folder_count_on_insert " +
+        " AFTER INSERT ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+        " END";
+
+    /**
+     * 当从文件夹删除笔记时，减少该文件夹的笔记数量的触发器SQL语句
+     */
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER decrease_folder_count_on_delete " +
+        " AFTER DELETE ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  UPDATE " + TABLE.NOTEWITH + "=" + NoteColumns.NOTES_COUNT + "-1" +
+        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+        "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
+        " END";
+
+    /**
+     * 当插入类型为{@link DataConstants#NOTE}的数据时，更新笔记内容的触发器SQL语句
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
+        "CREATE TRIGGER update_note_content_on_insert " +
+        " AFTER INSERT ON " + TABLE.DATA +
+        " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+        " END";
+
+    /**
+     * 当类型为{@link DataConstants#NOTE}的数据更新时，更新笔记内容的触发器SQL语句
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
+        "CREATE TRIGGER update_note_content_on_update " +
+        " AFTER UPDATE ON " + TABLE.DATA +
+        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+        " END";
+
+    /**
+     * 当类型为{@link DataConstants#NOTE}的数据删除时，更新笔记内容的触发器SQL语句
+     */
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER update_note_content_on_delete " +
+        " AFTER delete ON " + TABLE.DATA +
+        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.SNIPPET + "=''" +
+        "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
+        " END";
+
+    /**
+     * 当笔记被删除时，删除与之关联的数据的触发器SQL语句
+     */
+    private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER delete_data_on_delete " +
+        " AFTER DELETE ON " + TABLE.NOTE +
+        " BEGIN" +
+        "  DELETE FROM " + TABLE.DATA +
+        "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
+        " END";
+
+    /**
+     * 当文件夹被删除时，删除该文件夹下所有笔记的触发器SQL语句
+     */
+    private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
+        "CREATE TRIGGER folder_delete_notes_on_delete " +
+        " AFTER DELETE ON " + TABLE.NOTE +
+        " BEGIN " +
+        "  DELETE FROM " + TABLE.NOTE +
+        "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+        " END";
+
+    /**
+     * 当文件夹被移动到回收站文件夹时，移动该文件夹下所有笔记到回收站的触发器SQL语句
+     */
+    private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
+        "CREATE TRIGGER folder_move_notes_on_trash " +
+        " AFTER UPDATE ON " + TABLE.NOTE +
+        " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+        " BEGIN" +
+        "  UPDATE " + TABLE.NOTE +
+        "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+        "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+        " END";
+
+    // 构造函数，初始化数据库帮助类
+    public NotesDatabaseHelper(Context context) {
+        super(context, DB_NAME, null, DB_VERSION);
+    }
+
+    // 创建笔记表的方法
+    public void createNoteTable(SQLiteDatabase db) {
+        // 执行创建笔记表的SQL语句
+        db.execSQL(CREATE_NOTE_TABLE_SQL);
+        // 重新创建笔记表相关的触发器
+        reCreateNoteTableTriggers(db);
+        // 创建系统文件夹
+        createSystemFolder(db);
+        Log.d(TAG, "note table has been created");
+    }
+
+    // 重新创建笔记表相关触发器的私有方法
+    private void reCreateNoteTableTriggers(SQLiteDatabase db) {
+        // 删除已有的触发器（如果存在）
+        db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
+        db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
+
+        // 重新创建触发器
+        db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
+        db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
+        db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
+        db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
+        db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
+        db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
+        db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
+    }
+
+    // 创建系统文件夹的私有方法
+    private void createSystemFolder(SQLiteDatabase db) {
+        ContentValues values = new ContentValues();
+
+        /**
+         * 通话记录文件夹，用于存放通话笔记
+         */
+        values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * 根文件夹，默认文件夹
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * 临时文件夹，用于移动笔记
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+
+        /**
+         * 创建回收站文件夹
+         */
+        values.clear();
+        values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+        values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+        db.insert(TABLE.NOTE, null, values);
+    }
+
+    // 创建数据表的方法
+    public void createDataTable(SQLiteDatabase db) {
+        // 执行创建数据表的SQL语句
+        db.execSQL(CREATE_DATA_TABLE_SQL);
+        // 重新创建数据表相关的触发器
+        reCreateDataTableTriggers(db);
+        // 创建数据表里的note_id索引
+        db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
+        Log.d(TAG, "data table has been created");
+    }
+
+    // 重新创建数据表相关触发器的私有方法
+    private void reCreateDataTableTriggers(SQLiteDatabase db) {
+        // 删除已有的触发器（如果存在）
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
+        db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
+
+        // 重新创建触发器
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
+        db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
+    }
+
+    // 获取单例实例的静态同步方法
+    static synchronized NotesDatabaseHelper getInstance(Context context) {
+        if (mInstance == null) {
+            mInstance = new NotesDatabaseHelper(context);
+        }
+        return mInstance;
+    }
+
+    // 数据库初次创建时调用的方法
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        createNoteTable(db);
+        createDataTable(db);
+    }
+
+    // 数据库升级时调用的方法
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        boolean reCreateTriggers = false;
+        boolean skipV2 = false;
+
+        if (oldVersion == 1) {
+            upgradeToV2(db);
+            skipV2 = true; // 这次升级包含了从v2到v3的升级
+            oldVersion++;
+        }
+
+        if (oldVersion == 2 &&!skipV2) {
+            upgradeToV3(db);
+            reCreateTriggers = true;
+            oldVersion++;
+        }
+
+        if (oldVersion == 3) {
+            upgradeToV4(db);
+            oldVersion++;
+        }
+
+        if (reCreateTriggers) {
+            reCreateNoteTableTriggers(db);
+            reCreateDataTableTriggers(db);
+        }
+
+        if (oldVersion!= newVersion) {
+            throw new IllegalStateException("Upgrade notes database to version " + newVersion
+                    + "fails");
+        }
+    }
+
+    // 从版本1升级到版本2的私有方法
+    private void upgradeToV2(SQLiteDatabase db) {
+        // 删除已有的笔记表和数据表（如果存在）
+        db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
+        db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
+        createNoteTable(db);
+        createDataTable(db);
+    }
+
+       // 将数据库从版本2升级到版本3的方法
+private void upgradeToV3(SQLiteDatabase db) {
+    // 删除不再使用的触发器，防止数据库升级过程中出现冲突或冗余操作
+    db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
+    db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
+    db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
+
+    // 给笔记表（TABLE.NOTE）添加一个新列gtask_id，用于存储与Google任务相关的ID，类型为文本，默认值为空字符串
+    db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+            + " TEXT NOT NULL DEFAULT ''");
+
+    // 插入一个新的系统文件夹，用于存放回收站相关的内容
+    ContentValues values = new ContentValues();
+    // 设置文件夹ID为回收站对应的ID
+    values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
+    // 设置文件夹类型为系统类型
+    values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
+    // 将新的系统文件夹插入到笔记表中
+    db.insert(TABLE.NOTE, null, values);
+}
+
+// 将数据库从版本3升级到版本4的方法
+private void upgradeToV4(SQLiteDatabase db) {
+    // 给笔记表（TABLE.NOTE）添加一个新列version，用于存储版本信息，类型为整数，默认值为0
+    db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+            + " INTEGER NOT NULL DEFAULT 0");
+}

src/data/NotesProvider.txt

@@ -0,0 +1,357 @@
+/*
+ * 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文件 except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.micode.notes.data;
+
+import android.app.SearchManager;
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Intent;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.text.TextUtils;
+import android.util.Log;
+
+import net.micode.notes.R;
+import net.micode.notes.data.Notes.DataColumns;
+import net.micode.notes.data.Notes.NoteColumns;
+import net.micode.notes.data.NotesDatabaseHelper.TABLE;
+
+// NotesProvider类是一个内容提供器，用于向其他组件提供笔记相关的数据访问接口
+public class NotesProvider extends ContentProvider {
+    // 用于匹配不同Uri的UriMatcher实例
+    private static final UriMatcher mMatcher;
+    // 数据库帮助类实例，用于操作数据库
+    private NotesDatabaseHelper mHelper;
+    private static final String TAG = "NotesProvider";
+
+    // 定义不同Uri对应的匹配码
+    private static final int URI_NOTE = 1;
+    private static final int URI_NOTE_ITEM = 2;
+    private static final int URI_DATA = 3;
+    private static final int URI_DATA_ITEM = 4;
+    private static final int URI_SEARCH = 5;
+    private static final int URI_SEARCH_SUGGEST = 6;
+
+    static {
+        // 初始化UriMatcher
+        mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        // 添加匹配规则，"note"路径对应URI_NOTE
+        mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
+        // 添加匹配规则，"note/#"路径对应URI_NOTE_ITEM，其中#表示数字
+        mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
+        // 添加匹配规则，"data"路径对应URI_DATA
+        mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
+        // 添加匹配规则，"data/#"路径对应URI_DATA_ITEM
+        mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM);
+        // 添加匹配规则，"search"路径对应URI_SEARCH
+        mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH);
+        // 添加匹配规则，SearchManager.SUGGEST_URI_PATH_QUERY路径对应URI_SEARCH_SUGGEST
+        mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
+        // 添加匹配规则，SearchManager.SUGGEST_URI_PATH_QUERY + "/*"路径对应URI_SEARCH_SUGGEST
+        mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
+    }
+
+    /**
+     * x'0A'在SQLite中代表'\n'字符。对于搜索结果中的标题和内容，
+     * 我们将去除'\n'和空格，以便显示更多信息。
+     */
+    private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+            + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+            + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+            + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+            + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
+
+    // 用于搜索笔记片段的SQL查询语句
+    private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
+            + " FROM " + TABLE.NOTE
+            + " WHERE " + NoteColumns.SNIPPET + " LIKE?"
+            + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+            + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
+
+    @Override
+    public boolean onCreate() {
+        // 获取数据库帮助类的单例实例
+        mHelper = NotesDatabaseHelper.getInstance(getContext());
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+                        String sortOrder) {
+        Cursor c = null;
+        // 获取可读数据库实例
+        SQLiteDatabase db = mHelper.getReadableDatabase();
+        String id = null;
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                // 查询笔记表
+                c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
+                        sortOrder);
+                break;
+            case URI_NOTE_ITEM:
+                // 获取路径中的ID
+                id = uri.getPathSegments().get(1);
+                // 查询指定ID的笔记
+                c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs, null, null, sortOrder);
+                break;
+            case URI_DATA:
+                // 查询数据表
+                c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
+                        sortOrder);
+                break;
+            case URI_DATA_ITEM:
+                // 获取路径中的ID
+                id = uri.getPathSegments().get(1);
+                // 查询指定ID的数据
+                c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs, null, null, sortOrder);
+                break;
+            case URI_SEARCH:
+            case URI_SEARCH_SUGGEST:
+                if (sortOrder!= null || projection!= null) {
+                    // 如果指定了排序、选择条件等参数则抛出异常，因为这里不支持
+                    throw new IllegalArgumentException(
+                            "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
+                }
+
+                String searchString = null;
+                if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
+                    if (uri.getPathSegments().size() > 1) {
+                        // 从路径中获取搜索字符串
+                        searchString = uri.getPathSegments().get(1);
+                    }
+                } else {
+                    // 从Uri参数中获取搜索字符串
+                    searchString = uri.getQueryParameter("pattern");
+                }
+
+                if (TextUtils.isEmpty(searchString)) {
+                    return null;
+                }
+
+                try {
+                    // 格式化搜索字符串，添加通配符
+                    searchString = String.format("%%%s%%", searchString);
+                    // 执行原始查询
+                    c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
+                            new String[]{searchString});
+                } catch (IllegalStateException ex) {
+                    Log.e(TAG, "got exception: " + ex.toString());
+                }
+                break;
+            default:
+                // 如果Uri不匹配任何规则，抛出异常
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        if (c!= null) {
+            // 设置内容观察者的Uri，当数据变化时通知相关组件
+            c.setNotificationUri(getContext().getContentResolver(), uri);
+        }
+        return c;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        // 获取可写数据库实例
+        SQLiteDatabase db = mHelper.getWritableDatabase();
+        long dataId = 0, noteId = 0, insertedId = 0;
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                // 插入笔记数据
+                insertedId = noteId = db.insert(TABLE.NOTE, null, values);
+                break;
+            case URI_DATA:
+                if (values.containsKey(DataColumns.NOTE_ID)) {
+                    // 获取关联笔记的ID
+                    noteId = values.getAsLong(DataColumns.NOTE_ID);
+                } else {
+                    Log.d(TAG, "Wrong data format without note id:" + values.toString());
+                }
+                // 插入数据
+                insertedId = dataId = db.insert(TABLE.DATA, null, values);
+                break;
+            default:
+                // 如果Uri不匹配，抛出异常
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        // 通知笔记Uri数据已更改
+        if (noteId > 0) {
+            getContext().getContentResolver().notifyChange(
+                    ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
+        }
+
+        // 通知数据Uri数据已更改
+        if (dataId > 0) {
+            getContext().getContentResolver().notifyChange(
+                    ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
+        }
+
+        return ContentUris.withAppendedId(uri, insertedId);
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        int count = 0;
+        String id = null;
+        // 获取可写数据库实例
+        SQLiteDatabase db = mHelper.getWritableDatabase();
+        boolean deleteData = false;
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                // 补充删除条件，确保ID大于0
+                selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
+                // 执行删除操作
+                count = db.delete(TABLE.NOTE, selection, selectionArgs);
+                break;
+            case URI_NOTE_ITEM:
+                // 获取路径中的ID
+                id = uri.getPathSegments().get(1);
+                /**
+                 * ID小于等于0的是系统文件夹，不允许删除
+                 */
+                long noteId = Long.valueOf(id);
+                if (noteId <= 0) {
+                    break;
+                }
+                // 执行删除指定ID笔记的操作
+                count = db.delete(TABLE.NOTE,
+                        NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
+                break;
+            case URI_DATA:
+                // 执行删除数据操作
+                count = db.delete(TABLE.DATA, selection, selectionArgs);
+                deleteData = true;
+                break;
+            case URI_DATA_ITEM:
+                // 获取路径中的ID
+                id = uri.getPathSegments().get(1);
+                // 执行删除指定ID数据的操作
+                count = db.delete(TABLE.DATA,
+                        DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
+                deleteData = true;
+                break;
+            default:
+                // 如果Uri不匹配，抛出异常
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+        if (count > 0) {
+            if (deleteData) {
+                // 如果删除了数据，通知笔记Uri数据已更改
+                getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
+            }
+            // 通知当前Uri数据已更改
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+        return count;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        int count = 0;
+        String id = null;
+        // 获取可写数据库实例
+        SQLiteDatabase db = mHelper.getWritableDatabase();
+        boolean updateData = false;
+        switch (mMatcher.match(uri)) {
+            case URI_NOTE:
+                // 更新笔记版本
+                increaseNoteVersion(-1, selection, selectionArgs);
+                // 执行更新笔记操作
+                count = db.update(TABLE.NOTE, values, selection, selectionArgs);
+                break;
+            case URI_NOTE_ITEM:
+                // 获取路径中的ID
+                id = uri.getPathSegments().get(1);
+                // 更新指定ID笔记的版本
+                increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
+                // 执行更新指定ID笔记的操作
+                count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs);
+                break;
+            case URI_DATA:
+                // 执行更新数据操作
+                count = db.update(TABLE.DATA, values, selection, selectionArgs);
+                updateData = true;
+                break;
+            case URI_DATA_ITEM:
+                // 获取路径中的ID
+                id = uri.getPathSegments().get(1);
+                // 执行更新指定ID数据的操作
+                count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+                        + parseSelection(selection), selectionArgs);
+                updateData = true;
+                break;
+            default:
+                // 如果Uri不匹配，抛出异常
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+
+        if (count > 0) {
+            if (updateData) {
+                // 如果更新了数据，通知笔记Uri数据已更改
+                getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
+            }
+            // 通知当前Uri数据已更改
+            getContext().ContentViewResolver().notifyChange(uri, null);
+        }
+        return count;
+    }
+
+    // 辅助方法，用于拼接选择条件
+    private String parseSelection(String selection) {
+        return (!TextUtils.isEmpty(selection)? " AND (" + selection + ')' : "");
+    }
+
+    // 增加笔记版本号的私有方法
+    private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
+        StringBuilder sql = new StringBuilder(120);
+        sql.append("UPDATE ");
+        sql.append(TABLE.NOTE);
+        sql.append(" SET ");
+        sql.append(NoteColumns.VERSION);
+        sql.append("=" + NoteColumns.VERSION + "+1 ");
+
+        if (id > 0 ||!TextUtils.isEmpty(selection)) {
+            sql.append(" WHERE ");
+        }
+        if (id > 0) {
+            sql.append(NoteColumns.ID + "=" + String.valueOf(id));
+        }
+        if (!TextUtils.isEmpty(selection)) {
+            String selectString = id > 0? parseSelection(selection) : selection;
+            for (String args : selectionArgs) {
+                selectString = selectString.replaceFirst("\\?", args);
+            }
+            sql.append(selectString);
+        }
+
+        mHelper.getWritableDatabase().execSQL(sql.toString());
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        // 此方法需返回Uri对应的MIME类型，暂未实现
+        // TODO Auto-generated method stub
+        return null;
+    }
+}

src/gtask/gtask-exception.txt

@@ -0,0 +1,86 @@
+1.ActionFailureException.java
+
+package net.micode.notes.gtask.exception;
+
+// ActionFailureException类继承自RuntimeException，是一个自定义异常类
+// 用于表示在执行某些操作时发生了失败情况，通常与业务逻辑相关的操作失败有关
+public class ActionFailureException extends RuntimeException {
+    // serialVersionUID用于在序列化和反序列化对象时，确保版本兼容性
+    // 这里给定了一个固定的长整型数值，作为该异常类的序列化版本ID
+    private static final long serialVersionUID = 4425249765923293627L;
+
+    // 无参构造函数，调用父类（RuntimeException）的无参构造函数
+    // 当抛出此异常时，不携带任何详细信息，仅表示操作失败
+    public ActionFailureException() {
+        super();
+    }
+
+    // 带有一个字符串参数的构造函数，该字符串参数通常用于传递更详细的错误信息
+    // 调用父类的对应构造函数，将错误信息传递上去，方便在捕获异常时获取错误详情
+    public ActionFailureException(String paramString) {
+        super(paramString);
+    }
+
+    // 带有字符串参数和Throwable参数的构造函数
+    // 字符串参数用于提供错误描述信息，Throwable参数用于关联引发此异常的底层异常
+    // 可以让调用者更全面地了解异常产生的根源
+    public ActionFailureException(String paramString, Throwable paramThrowable) {
+        super(paramString, paramThrowable);
+    }
+}
+
+
+
+
+2.NetworkFailureException
+
+/*
+ * Copyright (c) 2010 - 2011, The MiCode Open Source Community (www.micode.net)
+ * 这段版权声明指出代码的版权归属，该代码来自MiCode开源社区，版权时间范围是2010年至2011年
+ * 并遵循Apache License 2.0开源协议。
+ */
+
+/*
+ * 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
+ * 以上注释说明代码遵循Apache License 2.0版本，若要使用此代码，必须遵守该许可协议，
+ * 可以通过指定的网址获取许可证副本。
+ *
+ *        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.exception;
+
+// NetworkFailureException类继承自Exception，属于自定义异常类，
+// 用于表示在网络相关操作中出现了故障的情况。
+public class NetworkFailureException extends Exception {
+    // serialVersionUID用于在序列化和反序列化异常对象时，确保版本兼容性，
+    // 这里给定了一个固定的长整型值，作为该异常类的序列化版本ID。
+    private static final long serialVersionUID = 2107610287180234136L;
+
+    // 无参构造函数，调用父类（Exception）的无参构造函数，
+    // 当抛出此异常时，不携带任何详细错误信息，仅表明网络操作失败。
+    public NetworkFailureException() {
+        super();
+    }
+
+    // 带有一个字符串参数的构造函数，该字符串参数通常用于传递具体的错误描述信息，
+    // 调用父类的对应构造函数，使得捕获异常时能够获取详细错误内容。
+    public NetworkFailureException(String paramString) {
+        super(paramString);
+    }
+
+    // 带有字符串参数和Throwable参数的构造函数，
+    // 其中，字符串参数用于提供错误描述，Throwable参数用于关联引发此异常的底层异常，
+    // 方便调用者追踪异常产生的根源，获取更完整的异常信息。
+    public NetworkFailureException(String paramString, Throwable paramThrowable) {
+        super(paramString, paramThrowable);
+    }
+}