diff --git a/src/main/java/net/micode/notes/data/Contact.java b/src/main/java/net/micode/notes/data/Contact.java
index d65c239..95d8bce 100644
--- a/src/main/java/net/micode/notes/data/Contact.java
+++ b/src/main/java/net/micode/notes/data/Contact.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package net.micode.notes.data;//属于data这个包
+package net.micode.notes.data;
 
 import android.content.Context;
 import android.database.Cursor;
@@ -25,64 +25,63 @@ import android.util.Log;
 
 import java.util.HashMap;
 /**
- * @Package:        net.micode.notes.data
- * @ClassName:      Contact
- * @Description:
- * Contact类用于查询联系人信息并进行缓存。
- * 该类包含一个静态的HashMap作为缓存，存储电话号码和对应的联系人名字。
- * 通过调用getContact方法可以根据给定的电话号码查询联系人名字。
- * 如果缓存中已经存在该电话号码对应的联系人名字，则直接返回缓存中的结果，否则通过查询数据库获取联系人名字并更新缓存。
- * 该类还定义了一个私有的SQL筛选语句用于查询联系人信息。
- * 注意：该类是线程不安全的，如果需要在多线程环境下使用，请做好同步控制
- * @Author:         YangYizhe
- * @CreateDate:     12/17/2023 10:10 AM
- * @Version:        1.0
+  * @Package:        net.micode.notes.data
+  * @ClassName:      Contact
+  * @Description:
+  * @Author:         WUSHUXIAN
+  * @CreateDate:     2023/12/20 23:26
+  * @Version:        1.0
  */
 public class Contact {
-    /**
-     * 作为缓存,存储电话号码和对应的联系人名字
-     */
     private static HashMap<String, String> sContactCache;
-    private static final String TAG = "Contact";//设置日志TAG标签
+    private static final String TAG = "Contact";
 
-    //查询联系人的SQL筛选语句
     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
+     /**
+      * @method          getContact
+      * @description:
+      * @date:           2023/12/21 19:18
+      * @author:         WuShuxian
+      * @param:          context
+      * @param:          phoneNumber
+      * @return:         String
+      */
     public static String getContact(Context context, String phoneNumber) {
-        if(sContactCache == null) {/*如果缓存为空，就新建一个*/
+        //
+        if(sContactCache == null) {
             sContactCache = new HashMap<String, String>();
         }
 
-        if(sContactCache.containsKey(phoneNumber)) {/*如果缓存中已经有该电话号码对应的联系人名字，就直接返回*/
+        if(sContactCache.containsKey(phoneNumber)) {
             return sContactCache.get(phoneNumber);
         }
 
         String selection = CALLER_ID_SELECTION.replace("+",
-                PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));//将电话号码转换为最小匹配模式，用于筛选
+                PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
         Cursor cursor = context.getContentResolver().query(
                 Data.CONTENT_URI,
                 new String [] { Phone.DISPLAY_NAME },
-                selection,//使用筛选条件
+                selection,
                 new String[] { phoneNumber },
                 null);
 
-        if (cursor != null && cursor.moveToFirst()) {//如果找到了符合条件的联系人
+        if (cursor != null && cursor.moveToFirst()) {
             try {
-                String name = cursor.getString(0);//获取联系人名字
-                sContactCache.put(phoneNumber, name);//将电话号码和联系人名字添加到缓存中
-                return name;//返回联系人名字
+                String name = cursor.getString(0);
+                sContactCache.put(phoneNumber, name);
+                return name;
             } catch (IndexOutOfBoundsException e) {
                 Log.e(TAG, " Cursor get string error " + e.toString());
                 return null;
             } finally {
-                cursor.close();//关闭游标
+                cursor.close();
             }
-        } else {/*没找到*/
+        } else {
             Log.d(TAG, "No contact matched with number:" + phoneNumber);
             return null;
         }
diff --git a/src/main/java/net/micode/notes/data/Notes.java b/src/main/java/net/micode/notes/data/Notes.java
index aba2dbb..8762500 100644
--- a/src/main/java/net/micode/notes/data/Notes.java
+++ b/src/main/java/net/micode/notes/data/Notes.java
@@ -17,11 +17,17 @@
 package net.micode.notes.data;
 
 import android.net.Uri;
-//Notes类就定义了很多常量，是小米便签的数据库
+/**
+  * @Package:        net.micode.notes.data
+  * @ClassName:      Notes
+  * @Description:
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/21 19:32
+  * @Version:        1.0
+ */
 public class Notes {
     public static final String AUTHORITY = "micode_notes";
     public static final String TAG = "Notes";
-    //三个type
     public static final int TYPE_NOTE     = 0;
     public static final int TYPE_FOLDER   = 1;
     public static final int TYPE_SYSTEM   = 2;
@@ -32,7 +38,6 @@ public class Notes {
      * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
      * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
      */
-    //不同种类的文件夹
     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;
@@ -48,12 +53,12 @@ public class Notes {
     public static final int TYPE_WIDGET_INVALIDE      = -1;
     public static final int TYPE_WIDGET_2X            = 0;
     public static final int TYPE_WIDGET_4X            = 1;
-    //数据常量 包括普通note和call_note
+
     public static class DataConstants {
         public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
         public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
     }
-    //两个指针，一个找便签和文件夹，一个用来找数据
+
     /**
      * Uri to query all notes and folders
      */
@@ -62,201 +67,72 @@ public class Notes {
     /**
      * Uri to query data
      */
-
     public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
-    //Notecolumns类，用于创建数据库的表头
+
     public interface NoteColumns {
-        //具体每一项都给了英文注释
-        /**
-         * The unique ID for a row
-         * <P> Type: INTEGER (long) </P>
-         */
+
         public static final String ID = "_id";
 
-        /**
-         * The parent's id for note or folder
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String PARENT_ID = "parent_id";
 
-        /**
-         * Created data for note or folder
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String CREATED_DATE = "created_date";
 
-        /**
-         * Latest modified date
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String MODIFIED_DATE = "modified_date";
 
-
-        /**
-         * Alert date
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String ALERTED_DATE = "alert_date";
 
-        /**
-         * Folder's name or text content of note
-         * <P> Type: TEXT </P>
-         */
         public static final String SNIPPET = "snippet";
 
-        /**
-         * Note's widget id
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String WIDGET_ID = "widget_id";
 
-        /**
-         * Note's widget type
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String WIDGET_TYPE = "widget_type";
 
-        /**
-         * Note's background color's id
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String BG_COLOR_ID = "bg_color_id";
 
-        /**
-         * For text note, it doesn't has attachment, for multi-media
-         * note, it has at least one attachment
-         * <P> Type: INTEGER </P>
-         */
         public static final String HAS_ATTACHMENT = "has_attachment";
 
-        /**
-         * Folder's count of notes
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String NOTES_COUNT = "notes_count";
 
-        /**
-         * The file type: folder or note
-         * <P> Type: INTEGER </P>
-         */
         public static final String TYPE = "type";
 
-        /**
-         * The last sync id
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String SYNC_ID = "sync_id";
 
-        /**
-         * Sign to indicate local modified or not
-         * <P> Type: INTEGER </P>
-         */
         public static final String LOCAL_MODIFIED = "local_modified";
 
-        /**
-         * Original parent id before moving into temporary folder
-         * <P> Type : INTEGER </P>
-         */
         public static final String ORIGIN_PARENT_ID = "origin_parent_id";
 
-        /**
-         * The gtask id
-         * <P> Type : TEXT </P>
-         */
         public static final String GTASK_ID = "gtask_id";
 
-        /**
-         * The version code
-         * <P> Type : INTEGER (long) </P>
-         */
         public static final String VERSION = "version";
+    }
 
-        public static final String PASSWORD = "password";
-
-        public static final String IMPORTANCE = "importance";
-    }//便签的各种属性
-    /*
-     * 便签数据在数据库中的表头
-     */
     public interface DataColumns {
-        /**
-         * The unique ID for a row
-         * <P> Type: INTEGER (long) </P>
-         */
+
         public static final String ID = "_id";
 
-        /**
-         * The MIME type of the item represented by this row.
-         * <P> Type: Text </P>
-         */
         public static final String MIME_TYPE = "mime_type";
 
-        /**
-         * The reference id to note that this data belongs to
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String NOTE_ID = "note_id";
 
-        /**
-         * Created data for note or folder
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String CREATED_DATE = "created_date";
 
-        /**
-         * Latest modified date
-         * <P> Type: INTEGER (long) </P>
-         */
         public static final String MODIFIED_DATE = "modified_date";
 
-        /**
-         * Data's content
-         * <P> Type: TEXT </P>
-         */
         public static final String CONTENT = "content";
 
-
-        /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * integer data type
-         * <P> Type: INTEGER </P>
-         */
         public static final String DATA1 = "data1";
 
-        /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * integer data type
-         * <P> Type: INTEGER </P>
-         */
         public static final String DATA2 = "data2";
 
-        /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * TEXT data type
-         * <P> Type: TEXT </P>
-         */
         public static final String DATA3 = "data3";
 
-        /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * TEXT data type
-         * <P> Type: TEXT </P>
-         */
         public static final String DATA4 = "data4";
 
-        /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * TEXT data type
-         * <P> Type: TEXT </P>
-         */
         public static final String DATA5 = "data5";
-    }//一个便签内部各种数据类型
+    }
 
     public static final class TextNote implements DataColumns {
-        /**
-         * Mode to indicate the text in check list mode or not
-         * <P> Type: Integer 1:check list mode 0: normal mode </P>
-         */
+
         public static final String MODE = DATA1;
 
         public static final int MODE_CHECK_LIST = 1;
@@ -266,19 +142,12 @@ public class Notes {
         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");
-    }//一种是文本textnote
+    }
 
     public static final class CallNote implements DataColumns {
-        /**
-         * Call date for this record
-         * <P> Type: INTEGER (long) </P>
-         */
+
         public static final String CALL_DATE = DATA1;
 
-        /**
-         * Phone number for this record
-         * <P> Type: TEXT </P>
-         */
         public static final String PHONE_NUMBER = DATA3;
 
         public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
@@ -286,5 +155,5 @@ public class Notes {
         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");
-    }//另一种是通话类型的callnote
+    }
 }
diff --git a/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
index bedbf65..1f05bbf 100644
--- a/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
+++ b/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
@@ -16,22 +16,31 @@
 
 package net.micode.notes.data;
 
-import android.content.ContentValues;
+import android.content.ContentValues;//就是用于保存一些数据（string boolean ...）信息，这些信息可以被数据库操作时使用。
 import android.content.Context;
-import android.database.sqlite.SQLiteDatabase;
-import android.database.sqlite.SQLiteOpenHelper;
+import android.database.sqlite.SQLiteDatabase;//主要提供了对应于添加、删除、更新、查询的操作方法： insert()、delete()、update()和query()。配合content.values
+import android.database.sqlite.SQLiteOpenHelper;//用来管理数据的创建和版本更新
 import android.util.Log;
-//引用了同一个包中的另一个子包Notes中一些接口
+
 import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.DataConstants;
 import net.micode.notes.data.Notes.NoteColumns;
 
-//数据库操作
+/**
+  * @Package:        net.micode.notes.data
+  * @ClassName:      NotesDatabaseHelper
+  * @Description:    便签数据库操作底层实现
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/21 19:46
+  * @Version:        1.0
+ */
 public class NotesDatabaseHelper extends SQLiteOpenHelper {
     private static final String DB_NAME = "note.db";
 
     private static final int DB_VERSION = 4;
-    //接口两部分一个Note一个DATA
+    /**
+    * 接口，创建数据库表头
+    */
     public interface TABLE {
         public static final String NOTE = "note";
 
@@ -41,7 +50,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     private static final String TAG = "NotesDatabaseHelper";
 
     private static NotesDatabaseHelper mInstance;
-    //基于NoteColumn创建一个NOTE_TABLE表格，并附上初始数据
+    /**
+    * 便签的属性数据库
+    */
     private static final String CREATE_NOTE_TABLE_SQL =
         "CREATE TABLE " + TABLE.NOTE + "(" +
             NoteColumns.ID + " INTEGER PRIMARY KEY," +
@@ -62,7 +73,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
             NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
         ")";
-    //主要基于datacolumn来创建DATA_TABLE
+    /**
+    * 便签的内容数据库
+    */
     private static final String CREATE_DATA_TABLE_SQL =
         "CREATE TABLE " + TABLE.DATA + "(" +
             DataColumns.ID + " INTEGER PRIMARY KEY," +
@@ -77,13 +90,13 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
             DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
         ")";
-    //这个数据是关于INDEX编号的
+
     private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
         "CREATE INDEX IF NOT EXISTS note_id_index ON " +
         TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
 
     /**
-     * Increase folder's note count when move note to the folder
+     * 文件夹内移进便签时需要修改的数据
      */
     private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
         "CREATE TRIGGER increase_folder_count_on_update "+
@@ -93,9 +106,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
         "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
         " END";
-    //移入note时触发，修改一系列数据，从哪来之类的
+
     /**
-     * Decrease folder's note count when move note from folder
+     * 便签移出文件夹时需要修改的数据
      */
     private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
         "CREATE TRIGGER decrease_folder_count_on_update " +
@@ -106,9 +119,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
         "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
         " END";
-    //移除Note时触发，与上面移入对应
+
     /**
-     * Increase folder's note count when insert new note to the folder
+     * 插入（新建）便签时需要修改的数据
      */
     private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
         "CREATE TRIGGER increase_folder_count_on_insert " +
@@ -118,9 +131,9 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
         "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
         " END";
-    //插入Note
+
     /**
-     * Decrease folder's note count when delete note from the folder
+     * 删除便签时需要修改的数据
      */
     private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
         "CREATE TRIGGER decrease_folder_count_on_delete " +
@@ -131,7 +144,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
         "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
         " END";
-    //删除note
+
     /**
      * Update note's content when insert data with type {@link DataConstants#NOTE}
      */
@@ -144,7 +157,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
         "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
         " END";
-    //当给note插入新数据时触发
+
     /**
      * Update note's content when data with {@link DataConstants#NOTE} type has changed
      */
@@ -156,7 +169,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
         "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";//note数据被修改update
+        " END";
 
     /**
      * Update note's content when data with {@link DataConstants#NOTE} type has deleted
@@ -169,7 +182,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=''" +
         "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
-        " END";//更新已经删除的便签的数据
+        " END";
 
     /**
      * Delete datas belong to note which has been deleted
@@ -180,7 +193,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         " BEGIN" +
         "  DELETE FROM " + TABLE.DATA +
         "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
-        " END";//删除 已经被删除的便签的数据
+        " END";
 
     /**
      * Delete notes belong to folder which has been deleted
@@ -191,7 +204,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         " BEGIN" +
         "  DELETE FROM " + TABLE.NOTE +
         "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";//删除 已删除folder文件夹 中的便签要修改的数据
+        " END";
 
     /**
      * Move notes belong to folder which has been moved to trash folder
@@ -204,12 +217,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
         "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";//移动trash_folder中的便签
+        " END";
 
     public NotesDatabaseHelper(Context context) {
         super(context, DB_NAME, null, DB_VERSION);
     }
-    //构造函数
+
     public void createNoteTable(SQLiteDatabase db) {
         db.execSQL(CREATE_NOTE_TABLE_SQL);
         reCreateNoteTableTriggers(db);
@@ -233,49 +246,48 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         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);
-    }//数据库操作的API，重新创建
-
+    }
+     /**
+      * @method          createSystemFolder
+      * @description:    创建系统缺省文件夹：通话记录、缺省根目录、临时文件夹、回收文件夹
+      * @date:           2023/12/21 20:19
+      * @author:         WuShuxian
+      * @param:          db
+      * @return:         void
+      */
     private void createSystemFolder(SQLiteDatabase db) {
         ContentValues values = new ContentValues();
 
-        /**
-         * call record foler for call notes
-         */
+        //通话记录文件夹
         values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
 
-        /**
-         * root folder which is default folder
-         */
+        //缺省根目录
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
 
-        /**
-         * temporary folder which is used for moving note
-         */
+        //临时文件夹
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
 
-        /**
-         * create trash folder
-         */
+        //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);
-    }//创建系统文件夹
+    }
 
     public void createDataTable(SQLiteDatabase db) {
         db.execSQL(CREATE_DATA_TABLE_SQL);
         reCreateDataTableTriggers(db);
         db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
         Log.d(TAG, "data table has been created");
-    }//创建数据表格
+    }
 
     private void reCreateDataTableTriggers(SQLiteDatabase db) {
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
@@ -285,38 +297,45 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         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);
-    }//类似于recreatenotetable，重新创建触发器
+    }
 
     static synchronized NotesDatabaseHelper getInstance(Context context) {
         if (mInstance == null) {
             mInstance = new NotesDatabaseHelper(context);
         }
         return mInstance;
-    }//sync同步，同一时刻只有一个线程执行
+    }
 
     @Override
     public void onCreate(SQLiteDatabase db) {
-        createNoteTable(db);
-        createDataTable(db);
-    }//创建Note Data两个表格
-
+        createNoteTable(db);//属性数据库
+        createDataTable(db);//内容数据库
+    }
+     /**
+      * @method          onUpgrade
+      * @description:    便签版本更新？没有使用者判断不了
+      * @date:           2023/12/21 20:42
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
         boolean reCreateTriggers = false;
         boolean skipV2 = false;
-
+        //V1->V2
         if (oldVersion == 1) {
             upgradeToV2(db);
             skipV2 = true; // this upgrade including the upgrade from v2 to v3
             oldVersion++;
         }
-
+        //V2->V3
         if (oldVersion == 2 && !skipV2) {
             upgradeToV3(db);
             reCreateTriggers = true;
             oldVersion++;
         }
-
+        //V3->V4
         if (oldVersion == 3) {
             upgradeToV4(db);
             oldVersion++;
@@ -331,15 +350,19 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             throw new IllegalStateException("Upgrade notes database to version " + newVersion
                     + "fails");
         }
-    }//数据库版本更新
-
+    }
+    /**
+    * 升级到V2，修改相应数据库
+    */
     private void upgradeToV2(SQLiteDatabase db) {
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
         createNoteTable(db);
         createDataTable(db);
-    }//更新到V2
-
+    }
+    /**
+    * 升级到V3，修改相应数据库
+    */
     private void upgradeToV3(SQLiteDatabase db) {
         // drop unused triggers
         db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
@@ -353,10 +376,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
-    }//更新到V3
-
+    }
+    /**
+    * 升级到V4，修改相应数据库
+    */
     private void upgradeToV4(SQLiteDatabase db) {
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
                 + " INTEGER NOT NULL DEFAULT 0");
-    }//更新到V4
+    }
 }
diff --git a/src/main/java/net/micode/notes/data/NotesProvider.java b/src/main/java/net/micode/notes/data/NotesProvider.java
index 6897999..ddb2282 100644
--- a/src/main/java/net/micode/notes/data/NotesProvider.java
+++ b/src/main/java/net/micode/notes/data/NotesProvider.java
@@ -1,5 +1,22 @@
+/*
+ * 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.app.SearchManager;
 import android.content.ContentProvider;
 import android.content.ContentUris;
@@ -16,15 +33,19 @@ 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;
-//为存储和获取数据提供接口。可以在不同的应用程序之间共享数据
-//ContentProvider提供的方法
-//query：查询
-//insert：插入
-//update：更新
-//delete：删除
-//getType：得到数据类型
+
+/**
+  * @Package:        net.micode.notes.data
+  * @ClassName:      NotesProvider
+  * @Description:    为存储和获取数据提供接口。可以在不同的应用程序之间共享数据
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/21 20:50
+  * @Version:        1.0
+ */
 public class NotesProvider extends ContentProvider {
-    // UriMatcher用于匹配Uri
+    /**
+    *  UriMatcher用于匹配Uri
+    */
     private static final UriMatcher mMatcher;
 
     private NotesDatabaseHelper mHelper;
@@ -40,9 +61,7 @@ public class NotesProvider extends ContentProvider {
     private static final int URI_SEARCH_SUGGEST  = 6;
 
     static {
-        // 创建UriMatcher时，调用UriMatcher(UriMatcher.NO_MATCH)表示不匹配任何路径的返回码
         mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
-        // 把需要匹配Uri路径全部给注册上
         mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
         mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM);
         mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA);
@@ -53,43 +72,44 @@ public class NotesProvider extends ContentProvider {
     }
 
     /**
+     * 搜索字段
      * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
      * we will trim '\n' and white space in order to show more information.
      */
-    // 声明 NOTES_SEARCH_PROJECTION
     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;
-    // 声明NOTES_SNIPPET_SEARCH_QUERY
+        + 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;
+
     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;
+        + " FROM " + TABLE.NOTE
+        + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+        + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+        + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
 
     @Override
-    // Context只有在onCreate()中才被初始化
-    // 对mHelper进行实例化
     public boolean onCreate() {
         mHelper = NotesDatabaseHelper.getInstance(getContext());
         return true;
     }
-
+    /**
+      * @Package:        net.micode.notes.data
+      * @ClassName:      NotesProvider
+      * @Description:    查询Uri在数据库中的位置
+      * @Author:         WuShuxian
+      * @CreateDate:     2023/12/21 21:06
+      * @Version:        1.0
+     */
     @Override
-    // 查询uri在数据库中对应的位置
     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
-                        String sortOrder) {
+            String sortOrder) {
         Cursor c = null;
-        // 获取可读数据库
-        SQLiteDatabase db = mHelper.getReadableDatabase();
+        SQLiteDatabase db = mHelper.getReadableDatabase();//读数据库
         String id = null;
-        // 匹配查找uri
         switch (mMatcher.match(uri)) {
-            // 对于不同的匹配值，在数据库中查找相应的条目
             case URI_NOTE:
                 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                         sortOrder);
@@ -111,7 +131,6 @@ public class NotesProvider extends ContentProvider {
             case URI_SEARCH:
             case URI_SEARCH_SUGGEST:
                 if (sortOrder != null || projection != null) {
-                    // 不合法的参数异常
                     throw new IllegalArgumentException(
                             "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
                 }
@@ -119,8 +138,6 @@ public class NotesProvider extends ContentProvider {
                 String searchString = null;
                 if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
                     if (uri.getPathSegments().size() > 1) {
-                        // getPathSegments()方法得到一个String的List，
-                        // 在uri.getPathSegments().get(1)为第2个元素
                         searchString = uri.getPathSegments().get(1);
                     }
                 } else {
@@ -132,7 +149,7 @@ public class NotesProvider extends ContentProvider {
                 }
 
                 try {
-                    searchString = String.format("%%%s%%", searchString);
+                    searchString = String.format("%%%s%%", searchString);//在新建便签并输入内容保存后会跳到这里，暂时不知道为什么
                     c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
                             new String[] { searchString });
                 } catch (IllegalStateException ex) {
@@ -140,7 +157,6 @@ public class NotesProvider extends ContentProvider {
                 }
                 break;
             default:
-                // 抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (c != null) {
@@ -149,18 +165,22 @@ public class NotesProvider extends ContentProvider {
         return c;
     }
 
+     /**
+      * @method          insert
+      * @description:    插入一个Uri，只有新建便签并保存后才会触发，修改内容不会触发
+      * @date:           2023/12/21 21:16
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
-    // 插入一个uri
     public Uri insert(Uri uri, ContentValues values) {
-        // 获得可写的数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         long dataId = 0, noteId = 0, insertedId = 0;
         switch (mMatcher.match(uri)) {
-            // 新增一个条目
             case URI_NOTE:
                 insertedId = noteId = db.insert(TABLE.NOTE, null, values);
                 break;
-            // 如果存在，查找NOTE_ID
             case URI_DATA:
                 if (values.containsKey(DataColumns.NOTE_ID)) {
                     noteId = values.getAsLong(DataColumns.NOTE_ID);
@@ -173,7 +193,6 @@ public class NotesProvider extends ContentProvider {
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         // Notify the note uri
-        // notifyChange获得一个ContextResolver对象并且更新里面的内容
         if (noteId > 0) {
             getContext().getContentResolver().notifyChange(
                     ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
@@ -185,17 +204,20 @@ public class NotesProvider extends ContentProvider {
                     ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
         }
 
-        // 返回插入的uri的路径
         return ContentUris.withAppendedId(uri, insertedId);
     }
-
+     /**
+      * @method          delete
+      * @description:    删除一个Uri，删除便签时会触发
+      * @date:           2023/12/21 21:17
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
-    // 删除一个uri
     public int delete(Uri uri, String selection, String[] selectionArgs) {
-        //Uri代表要操作的数据，Android上可用的每种资源 -包括 图像、视频片段、音频资源等都可以用Uri来表示。
         int count = 0;
         String id = null;
-        // 获得可写的数据库
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean deleteData = false;
         switch (mMatcher.match(uri)) {
@@ -204,7 +226,7 @@ public class NotesProvider extends ContentProvider {
                 count = db.delete(TABLE.NOTE, selection, selectionArgs);
                 break;
             case URI_NOTE_ITEM:
-                id = uri.getPathSegments().get(1);
+                id = uri.getPathSegments().get(1);//修改便签内容时会触发，原因不明
                 /**
                  * ID that smaller than 0 is system folder which is not allowed to
                  * trash
@@ -237,9 +259,15 @@ public class NotesProvider extends ContentProvider {
         }
         return count;
     }
-
+     /**
+      * @method          update
+      * @description:    更新Uri，修改便签时会触发。期间会跳到delete中执行，原因不明
+      * @date:           2023/12/21 21:19
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
-    // 更新一个uri
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
@@ -279,12 +307,10 @@ public class NotesProvider extends ContentProvider {
         return count;
     }
 
-    // 将字符串解析成规定格式
     private String parseSelection(String selection) {
         return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
     }
 
-    //增加一个noteVersion
     private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
         StringBuilder sql = new StringBuilder(120);
         sql.append("UPDATE ");
@@ -307,7 +333,6 @@ public class NotesProvider extends ContentProvider {
             sql.append(selectString);
         }
 
-        // execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句
         mHelper.getWritableDatabase().execSQL(sql.toString());
     }
 
@@ -317,4 +342,4 @@ public class NotesProvider extends ContentProvider {
         return null;
     }
 
-}
\ No newline at end of file
+}
diff --git a/src/main/java/net/micode/notes/gtask/data/MetaData.java b/src/main/java/net/micode/notes/gtask/data/MetaData.java
index 3a2050b..9b96094 100644
--- a/src/main/java/net/micode/notes/gtask/data/MetaData.java
+++ b/src/main/java/net/micode/notes/gtask/data/MetaData.java
@@ -24,12 +24,26 @@ import net.micode.notes.tool.GTaskStringUtils;
 import org.json.JSONException;
 import org.json.JSONObject;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.data
+  * @ClassName:      MetaData
+  * @Description:    一些元数据的操作
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/22 21:45
+  * @Version:        1.0
+ */
 public class MetaData extends Task {
     private final static String TAG = MetaData.class.getSimpleName();
 
     private String mRelatedGid = null;
-
+     /**
+      * @method          setMeta
+      * @description:    生成元数据库
+      * @date:           2023/12/24 20:07
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public void setMeta(String gid, JSONObject metaInfo) {
         try {
             metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
@@ -48,7 +62,14 @@ public class MetaData extends Task {
     public boolean isWorthSaving() {
         return getNotes() != null;
     }
-
+     /**
+      * @method          setContentByRemoteJSON
+      * @description:    从远程Json对象设置元数据库内容
+      * @date:           2023/12/24 20:11
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
     public void setContentByRemoteJSON(JSONObject js) {
         super.setContentByRemoteJSON(js);
@@ -62,7 +83,14 @@ public class MetaData extends Task {
             }
         }
     }
-
+     /**
+      * @method          setContentByLocalJSON
+      * @description:    根据本地Json对象设置元数据库内容
+      * @date:           2023/12/24 20:12
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
     public void setContentByLocalJSON(JSONObject js) {
         // this function should not be called
diff --git a/src/main/java/net/micode/notes/gtask/data/Node.java b/src/main/java/net/micode/notes/gtask/data/Node.java
index 63950e0..c3ebd5a 100644
--- a/src/main/java/net/micode/notes/gtask/data/Node.java
+++ b/src/main/java/net/micode/notes/gtask/data/Node.java
@@ -19,24 +19,50 @@ package net.micode.notes.gtask.data;
 import android.database.Cursor;
 
 import org.json.JSONObject;
-
+/**
+  * @Package:        net.micode.notes.gtask.data
+  * @ClassName:      Node
+  * @Description:    定义了同步节点：多个关于同步的常量，实现类似于Git的版本控制
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/21 21:30
+  * @Version:        1.0
+ */
 public abstract class Node {
+    /**
+    * 本地与云端一致
+    */
     public static final int SYNC_ACTION_NONE = 0;
-
+    /**
+    * 需要云端添加内容
+    */
     public static final int SYNC_ACTION_ADD_REMOTE = 1;
-
+    /**
+    * 需要本地添加内容
+    */
     public static final int SYNC_ACTION_ADD_LOCAL = 2;
-
+    /**
+    * 需要删除云端的内容
+    */
     public static final int SYNC_ACTION_DEL_REMOTE = 3;
-
+    /**
+    * 需要删除本地的内容
+    */
     public static final int SYNC_ACTION_DEL_LOCAL = 4;
-
+    /**
+    * 本地同步到云端
+    */
     public static final int SYNC_ACTION_UPDATE_REMOTE = 5;
-
+    /**
+    * 云端同步到本地
+    */
     public static final int SYNC_ACTION_UPDATE_LOCAL = 6;
-
+    /**
+    * 同步出现冲突
+    */
     public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;
-
+    /**
+    * 同步错误
+    */
     public static final int SYNC_ACTION_ERROR = 8;
 
     private String mGid;
diff --git a/src/main/java/net/micode/notes/gtask/data/SqlData.java b/src/main/java/net/micode/notes/gtask/data/SqlData.java
index d3ec3be..76ffb9f 100644
--- a/src/main/java/net/micode/notes/gtask/data/SqlData.java
+++ b/src/main/java/net/micode/notes/gtask/data/SqlData.java
@@ -34,7 +34,15 @@ import net.micode.notes.gtask.exception.ActionFailureException;
 import org.json.JSONException;
 import org.json.JSONObject;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.data
+  * @ClassName:      SqlData
+  * @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
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:13
+  * @Version:        1.0
+ */
 public class SqlData {
     private static final String TAG = SqlData.class.getSimpleName();
 
@@ -44,7 +52,9 @@ public class SqlData {
             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;
@@ -70,7 +80,14 @@ public class SqlData {
     private String mDataContentData3;
 
     private ContentValues mDiffDataValues;
-
+     /**
+      * @method          SqlData
+      * @description:    构造函数，用于初始化数据
+      * @date:           2023/12/24 20:17
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public SqlData(Context context) {
         mContentResolver = context.getContentResolver();
         mIsCreate = true;
@@ -81,14 +98,28 @@ public class SqlData {
         mDataContentData3 = "";
         mDiffDataValues = new ContentValues();
     }
-
+     /**
+      * @method          SqlData
+      * @description:    构造函数，根据已有数据初始化一个新的数据对象
+      * @date:           2023/12/24 20:17
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public SqlData(Context context, Cursor c) {
         mContentResolver = context.getContentResolver();
         mIsCreate = false;
         loadFromCursor(c);
         mDiffDataValues = new ContentValues();
     }
-
+     /**
+      * @method          loadFromCursor
+      * @description:    从光标处加载数据
+      * @date:           2023/12/24 20:18
+      * @author:         WuShuxian
+      * @param:          c:光标的位置
+      * @return:         void
+      */
     private void loadFromCursor(Cursor c) {
         mDataId = c.getLong(DATA_ID_COLUMN);
         mDataMimeType = c.getString(DATA_MIME_TYPE_COLUMN);
@@ -96,7 +127,14 @@ public class SqlData {
         mDataContentData1 = c.getLong(DATA_CONTENT_DATA_1_COLUMN);
         mDataContentData3 = c.getString(DATA_CONTENT_DATA_3_COLUMN);
     }
-
+     /**
+      * @method          setContent
+      * @description:    设置用于共享的数据，并提供异常抛出与处理机制
+      * @date:           2023/12/24 20:19
+      * @author:         WuShuxian
+      * @param:          js: Json对象
+      * @return:         void
+      */
     public void setContent(JSONObject js) throws JSONException {
         long dataId = js.has(DataColumns.ID) ? js.getLong(DataColumns.ID) : INVALID_ID;
         if (mIsCreate || mDataId != dataId) {
@@ -143,7 +181,16 @@ public class SqlData {
         js.put(DataColumns.DATA3, mDataContentData3);
         return js;
     }
-
+     /**
+      * @method          commit
+      * @description:    commit函数用于把当前造作所做的修改保存到数据库
+      * @date:           2023/12/24 20:21
+      * @author:         WuShuxian
+      * @param:          noteId：要保存的便签ID
+      *                  validateVersion：判断此次修改是否合法
+      *                  version：版本号
+      * @return:         void
+      */
     public void commit(long noteId, boolean validateVersion, long version) {
 
         if (mIsCreate) {
diff --git a/src/main/java/net/micode/notes/gtask/data/SqlNote.java b/src/main/java/net/micode/notes/gtask/data/SqlNote.java
index 79a4095..ae97d68 100644
--- a/src/main/java/net/micode/notes/gtask/data/SqlNote.java
+++ b/src/main/java/net/micode/notes/gtask/data/SqlNote.java
@@ -37,7 +37,14 @@ import org.json.JSONObject;
 
 import java.util.ArrayList;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.data
+  * @ClassName:      SqlNote
+  * @Description:    用于支持小米便签最底层的数据库相关操作，和sqldata的关系上是父集关系，即note是data的子父集
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:23
+  * @Version:        1.0
+ */
 public class SqlNote {
     private static final String TAG = SqlNote.class.getSimpleName();
 
@@ -121,17 +128,24 @@ public class SqlNote {
     private ContentValues mDiffNoteValues;
 
     private ArrayList<SqlData> mDataList;
-
+     /**
+      * @method          SqlNote
+      * @description:    构造函数，初始化context的所有数据
+      * @date:           2023/12/24 20:24
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public SqlNote(Context context) {
         mContext = context;
         mContentResolver = context.getContentResolver();
-        mIsCreate = true;
+        mIsCreate = true;//用于标识构造方法
         mId = INVALID_ID;
         mAlertDate = 0;
         mBgColorId = ResourceParser.getDefaultBgId(context);
-        mCreatedDate = System.currentTimeMillis();
+        mCreatedDate = System.currentTimeMillis();//调用系统函数获得创建时间
         mHasAttachment = 0;
-        mModifiedDate = System.currentTimeMillis();
+        mModifiedDate = System.currentTimeMillis();//最后一次修改时间初始化为创建时间
         mParentId = 0;
         mSnippet = "";
         mType = Notes.TYPE_NOTE;
@@ -142,22 +156,36 @@ public class SqlNote {
         mDiffNoteValues = new ContentValues();
         mDataList = new ArrayList<SqlData>();
     }
-
+     /**
+      * @method          SqlNote
+      * @description:    构造函数，根据光标所指向的已有数据构造新对象
+      * @date:           2023/12/24 20:25
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public SqlNote(Context context, Cursor c) {
         mContext = context;
         mContentResolver = context.getContentResolver();
-        mIsCreate = false;
+        mIsCreate = false;//用于标识构造方法
         loadFromCursor(c);
         mDataList = new ArrayList<SqlData>();
         if (mType == Notes.TYPE_NOTE)
             loadDataContent();
         mDiffNoteValues = new ContentValues();
     }
-
+     /**
+      * @method          SqlNote
+      * @description:    构造函数，根据ID构造新对象
+      * @date:           2023/12/24 20:27
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public SqlNote(Context context, long id) {
         mContext = context;
         mContentResolver = context.getContentResolver();
-        mIsCreate = false;
+        mIsCreate = false;//标识构造方法
         loadFromCursor(id);
         mDataList = new ArrayList<SqlData>();
         if (mType == Notes.TYPE_NOTE)
@@ -199,7 +227,14 @@ public class SqlNote {
         mWidgetType = c.getInt(WIDGET_TYPE_COLUMN);
         mVersion = c.getLong(VERSION_COLUMN);
     }
-
+     /**
+      * @method          loadDataContent
+      * @description:    通过content机制获取共享数据并加载到数据库当前游标处
+      * @date:           2023/12/24 20:29
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     private void loadDataContent() {
         Cursor c = null;
         mDataList.clear();
@@ -439,7 +474,14 @@ public class SqlNote {
     public boolean isNoteType() {
         return mType == Notes.TYPE_NOTE;
     }
-
+     /**
+      * @method          commit
+      * @description:    commit函数用于把当前所做的修改保存到数据库
+      * @date:           2023/12/24 20:30
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public void commit(boolean validateVersion) {
         if (mIsCreate) {
             if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
diff --git a/src/main/java/net/micode/notes/gtask/data/Task.java b/src/main/java/net/micode/notes/gtask/data/Task.java
index 6a19454..bafeb0f 100644
--- a/src/main/java/net/micode/notes/gtask/data/Task.java
+++ b/src/main/java/net/micode/notes/gtask/data/Task.java
@@ -31,7 +31,14 @@ import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.data
+  * @ClassName:      Task
+  * @Description:    Node类的子类，用于支持任务列表的操作
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:31
+  * @Version:        1.0
+ */
 public class Task extends Node {
     private static final String TAG = Task.class.getSimpleName();
 
@@ -53,22 +60,25 @@ public class Task extends Node {
         mParent = null;
         mMetaInfo = null;
     }
-
+     /**
+      * @method          getCreateAction
+      * @description:    获取创建信息，以Json格式返回
+      * @date:           2023/12/24 20:33
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public JSONObject getCreateAction(int actionId) {
         JSONObject js = new JSONObject();
 
         try {
-            // action_type
             js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
                     GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
 
-            // action_id
             js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
 
-            // index
             js.put(GTaskStringUtils.GTASK_JSON_INDEX, mParent.getChildTaskIndex(this));
 
-            // entity_delta
             JSONObject entity = new JSONObject();
             entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
             entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
@@ -79,17 +89,13 @@ public class Task extends Node {
             }
             js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
 
-            // parent_id
             js.put(GTaskStringUtils.GTASK_JSON_PARENT_ID, mParent.getGid());
 
-            // dest_parent_type
             js.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT_TYPE,
                     GTaskStringUtils.GTASK_JSON_TYPE_GROUP);
 
-            // list_id
             js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
 
-            // prior_sibling_id
             if (mPriorSibling != null) {
                 js.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, mPriorSibling.getGid());
             }
@@ -102,22 +108,25 @@ public class Task extends Node {
 
         return js;
     }
-
+     /**
+      * @method          getUpdateAction
+      * @description:    获取创建动作，以Json格式返回
+      * @date:           2023/12/24 20:34
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     public JSONObject getUpdateAction(int actionId) {
         JSONObject js = new JSONObject();
 
         try {
-            // action_type
             js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
                     GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
 
-            // action_id
             js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
 
-            // id
             js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
 
-            // entity_delta
             JSONObject entity = new JSONObject();
             entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
             if (getNotes() != null) {
@@ -138,32 +147,26 @@ public class Task extends Node {
     public void setContentByRemoteJSON(JSONObject js) {
         if (js != null) {
             try {
-                // id
                 if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
                     setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
                 }
 
-                // last_modified
                 if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
                     setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
                 }
 
-                // name
                 if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
                     setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
                 }
 
-                // notes
                 if (js.has(GTaskStringUtils.GTASK_JSON_NOTES)) {
                     setNotes(js.getString(GTaskStringUtils.GTASK_JSON_NOTES));
                 }
 
-                // deleted
                 if (js.has(GTaskStringUtils.GTASK_JSON_DELETED)) {
                     setDeleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_DELETED));
                 }
 
-                // completed
                 if (js.has(GTaskStringUtils.GTASK_JSON_COMPLETED)) {
                     setCompleted(js.getBoolean(GTaskStringUtils.GTASK_JSON_COMPLETED));
                 }
@@ -208,7 +211,6 @@ public class Task extends Node {
         String name = getName();
         try {
             if (mMetaInfo == null) {
-                // new task created from web
                 if (name == null) {
                     Log.w(TAG, "the note seems to be an empty one");
                     return null;
@@ -225,7 +227,6 @@ public class Task extends Node {
                 js.put(GTaskStringUtils.META_HEAD_NOTE, note);
                 return js;
             } else {
-                // synced task
                 JSONObject note = mMetaInfo.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
                 JSONArray dataArray = mMetaInfo.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
 
@@ -275,29 +276,24 @@ public class Task extends Node {
                 return SYNC_ACTION_UPDATE_LOCAL;
             }
 
-            // validate the note id now
+            // 立即验证note id
             if (c.getLong(SqlNote.ID_COLUMN) != noteInfo.getLong(NoteColumns.ID)) {
                 Log.w(TAG, "note id doesn't match");
                 return SYNC_ACTION_UPDATE_LOCAL;
             }
 
             if (c.getInt(SqlNote.LOCAL_MODIFIED_COLUMN) == 0) {
-                // there is no local update
                 if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
-                    // no update both side
                     return SYNC_ACTION_NONE;
                 } else {
-                    // apply remote to local
                     return SYNC_ACTION_UPDATE_LOCAL;
                 }
             } else {
-                // validate gtask id
                 if (!c.getString(SqlNote.GTASK_ID_COLUMN).equals(getGid())) {
                     Log.e(TAG, "gtask id doesn't match");
                     return SYNC_ACTION_ERROR;
                 }
                 if (c.getLong(SqlNote.SYNC_ID_COLUMN) == getLastModified()) {
-                    // local modification only
                     return SYNC_ACTION_UPDATE_REMOTE;
                 } else {
                     return SYNC_ACTION_UPDATE_CONFLICT;
diff --git a/src/main/java/net/micode/notes/gtask/data/TaskList.java b/src/main/java/net/micode/notes/gtask/data/TaskList.java
index 4ea21c5..56802e9 100644
--- a/src/main/java/net/micode/notes/gtask/data/TaskList.java
+++ b/src/main/java/net/micode/notes/gtask/data/TaskList.java
@@ -29,7 +29,14 @@ import org.json.JSONObject;
 
 import java.util.ArrayList;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.data
+  * @ClassName:      TaskList
+  * @Description:    对Node的拓展，主要用于支持任务列表的操作
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:40
+  * @Version:        1.0
+ */
 public class TaskList extends Node {
     private static final String TAG = TaskList.class.getSimpleName();
 
@@ -47,17 +54,13 @@ public class TaskList extends Node {
         JSONObject js = new JSONObject();
 
         try {
-            // action_type
             js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
-                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_CREATE);// 动作类型
 
-            // action_id
-            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);// 动作编号
 
-            // index
             js.put(GTaskStringUtils.GTASK_JSON_INDEX, mIndex);
 
-            // entity_delta
             JSONObject entity = new JSONObject();
             entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
             entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
@@ -78,17 +81,13 @@ public class TaskList extends Node {
         JSONObject js = new JSONObject();
 
         try {
-            // action_type
             js.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
-                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);
+                    GTaskStringUtils.GTASK_JSON_ACTION_TYPE_UPDATE);//动作类型
 
-            // action_id
-            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);
+            js.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, actionId);//动作编号
 
-            // id
             js.put(GTaskStringUtils.GTASK_JSON_ID, getGid());
 
-            // entity_delta
             JSONObject entity = new JSONObject();
             entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
             entity.put(GTaskStringUtils.GTASK_JSON_DELETED, getDeleted());
@@ -106,17 +105,14 @@ public class TaskList extends Node {
     public void setContentByRemoteJSON(JSONObject js) {
         if (js != null) {
             try {
-                // id
                 if (js.has(GTaskStringUtils.GTASK_JSON_ID)) {
                     setGid(js.getString(GTaskStringUtils.GTASK_JSON_ID));
                 }
 
-                // last_modified
                 if (js.has(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED)) {
                     setLastModified(js.getLong(GTaskStringUtils.GTASK_JSON_LAST_MODIFIED));
                 }
 
-                // name
                 if (js.has(GTaskStringUtils.GTASK_JSON_NAME)) {
                     setName(js.getString(GTaskStringUtils.GTASK_JSON_NAME));
                 }
@@ -225,7 +221,6 @@ public class TaskList extends Node {
         if (task != null && !mChildren.contains(task)) {
             ret = mChildren.add(task);
             if (ret) {
-                // need to set prior sibling and parent
                 task.setPriorSibling(mChildren.isEmpty() ? null : mChildren
                         .get(mChildren.size() - 1));
                 task.setParent(this);
@@ -244,7 +239,7 @@ public class TaskList extends Node {
         if (task != null && pos == -1) {
             mChildren.add(index, task);
 
-            // update the task list
+            // 更新任务列表
             Task preTask = null;
             Task afterTask = null;
             if (index != 0)
@@ -267,11 +262,9 @@ public class TaskList extends Node {
             ret = mChildren.remove(task);
 
             if (ret) {
-                // reset prior sibling and parent
                 task.setPriorSibling(null);
                 task.setParent(null);
 
-                // update the task list
                 if (index != mChildren.size()) {
                     mChildren.get(index).setPriorSibling(
                             index == 0 ? null : mChildren.get(index - 1));
diff --git a/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java b/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
index 15504be..e46c70a 100644
--- a/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
+++ b/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
@@ -15,8 +15,19 @@
  */
 
 package net.micode.notes.gtask.exception;
-
+/**
+  * @Package:        net.micode.notes.gtask.exception
+  * @ClassName:      ActionFailureException
+  * @Description:    支持小米便签运行过程中的运行异常处理
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:45
+  * @Version:        1.0
+ */
 public class ActionFailureException extends RuntimeException {
+    /**
+    * serialVersionUID相当于java类的身份证。主要用于版本控制
+     * serialVersionUID作用是序列化时保持版本的兼容性，即在版本升级时反序列化仍保持对象的唯一性
+    */
     private static final long serialVersionUID = 4425249765923293627L;
 
     public ActionFailureException() {
diff --git a/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java b/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
index b08cfb1..4291ece 100644
--- a/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
+++ b/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
@@ -15,8 +15,19 @@
  */
 
 package net.micode.notes.gtask.exception;
-
+/**
+  * @Package:        net.micode.notes.gtask.exception
+  * @ClassName:      NetworkFailureException
+  * @Description:    支持小米便签运行过程中的网络异常处理
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:46
+  * @Version:        1.0
+ */
 public class NetworkFailureException extends Exception {
+    /**
+    * serialVersionUID相当于java类的身份证。主要用于版本控制。
+     * serialVersionUID作用是序列化时保持版本的兼容性，即在版本升级时反序列化仍保持对象的唯一性
+    */
     private static final long serialVersionUID = 2107610287180234136L;
 
     public NetworkFailureException() {
diff --git a/src/main/java/net/micode/notes/gtask/remote/GTaskASyncTask.java b/src/main/java/net/micode/notes/gtask/remote/GTaskASyncTask.java
index 0e332f3..075abe0 100644
--- a/src/main/java/net/micode/notes/gtask/remote/GTaskASyncTask.java
+++ b/src/main/java/net/micode/notes/gtask/remote/GTaskASyncTask.java
@@ -28,7 +28,14 @@ import net.micode.notes.R;
 import net.micode.notes.ui.NotesListActivity;
 import net.micode.notes.ui.NotesPreferenceActivity;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.remote
+  * @ClassName:      GTaskASyncTask
+  * @Description:    异步操作类，实现GTask的异步操作过程
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:49
+  * @Version:        1.0
+ */
 public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
 
     private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;
@@ -62,9 +69,22 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
             message
         });
     }
-
+     /**
+      * @method          showNotification
+      * @description:    向用户提示当前同步的状态，是一个用于交互的方法
+      * @date:           2023/12/24 20:50
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     private void showNotification(int tickerId, String content) {
+        Notification notification = new Notification(R.drawable.notification, mContext
+                .getString(tickerId), System.currentTimeMillis());
+        notification.defaults = Notification.DEFAULT_LIGHTS;
+        notification.flags = Notification.FLAG_AUTO_CANCEL;
         PendingIntent pendingIntent;
+        //如果同步不成功，那么从系统取得一个用于启动一个NotesPreferenceActivity的PendingIntent对象
+        //如果同步成功，那么从系统取得一个用于启动一个NotesListActivity的PendingIntent对象
         if (tickerId != R.string.ticker_success) {
             pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
                     NotesPreferenceActivity.class), 0);
@@ -73,21 +93,18 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
             pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
                     NotesListActivity.class), 0);
         }
-
-
-        Notification.Builder builder = new Notification.Builder(mContext)
-                .setAutoCancel(true)
-                .setContentTitle(mContext.getString(R.string.app_name))
-                .setContentText(content)
-                .setContentIntent(pendingIntent)
-                .setWhen(System.currentTimeMillis())
-                .setOngoing(true);
-        Notification notification=builder.getNotification();
+        //notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
+                //pendingIntent);
         mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
     }
-
-
-
+     /**
+      * @method          doInBackground
+      * @description:    此方法在后台线程执行，完成任务的主要工作，通常需要较长的时间
+      * @date:           2023/12/24 20:51
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
     protected Integer doInBackground(Void... unused) {
         publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity
@@ -95,6 +112,14 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
         return mTaskManager.sync(mContext, this);
     }
 
+     /**
+      * @method          onProgressUpdate
+      * @description:    可以使用进度条增加用户体验度。 此方法在主线程执行，用于显示任务执行的进度
+      * @date:           2023/12/24 20:51
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     @Override
     protected void onProgressUpdate(String... progress) {
         showNotification(R.string.ticker_syncing, progress[0]);
@@ -103,6 +128,14 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
         }
     }
 
+    /**
+     * @method          onPostExecute
+     * @description:    相当于Handler 处理UI的方式，在这里面可以使用在doInBackground 得到的结果处理操作UI
+     * @date:           2023/12/24 20:51
+     * @author:         WuShuxian
+     * @param:
+     * @return:
+     */
     @Override
     protected void onPostExecute(Integer result) {
         if (result == GTaskManager.STATE_SUCCESS) {
diff --git a/src/main/java/net/micode/notes/gtask/remote/GTaskClient.java b/src/main/java/net/micode/notes/gtask/remote/GTaskClient.java
index c67dfdf..f8a0547 100644
--- a/src/main/java/net/micode/notes/gtask/remote/GTaskClient.java
+++ b/src/main/java/net/micode/notes/gtask/remote/GTaskClient.java
@@ -60,7 +60,14 @@ import java.util.zip.GZIPInputStream;
 import java.util.zip.Inflater;
 import java.util.zip.InflaterInputStream;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.remote
+  * @ClassName:      GTaskClient
+  * @Description:    实现GTASK的登录操作，进行GTASK任务的创建，创建任务列表，从网络上获取任务和任务列表的内容
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 20:55
+  * @Version:        1.0
+ */
 public class GTaskClient {
     private static final String TAG = GTaskClient.class.getSimpleName();
 
@@ -90,6 +97,12 @@ public class GTaskClient {
 
     private JSONArray mUpdateArray;
 
+     /**
+      * @method          GTaskClient
+      * @description:    构造函数
+      * @date:           2023/12/24 20:56
+      * @author:         WuShuxian
+      */
     private GTaskClient() {
         mHttpClient = null;
         mGetUrl = GTASK_GET_URL;
@@ -108,35 +121,40 @@ public class GTaskClient {
         }
         return mInstance;
     }
-
+     /**
+      * @method          login
+      * @description:    用来实现登录操作，有两种登录方式，使用用户自己的URL登录或者使用谷歌官方的URL登录
+      * @date:           2023/12/24 21:15
+      * @author:         WuShuxian
+      * @param:          activity
+      * @return:         boolean
+      */
     public boolean login(Activity activity) {
-        // we suppose that the cookie would expire after 5 minutes
-        // then we need to re-login
+        //判断距离最后一次登录操作是否超过5分钟
         final long interval = 1000 * 60 * 5;
         if (mLastLoginTime + interval < System.currentTimeMillis()) {
             mLoggedin = false;
         }
 
-        // need to re-login after account switch
+        // 重新登陆操作
         if (mLoggedin
                 && !TextUtils.equals(getSyncAccount().name, NotesPreferenceActivity
                         .getSyncAccountName(activity))) {
             mLoggedin = false;
         }
-
+        //如果没超过时间，则不需要重新登录
         if (mLoggedin) {
             Log.d(TAG, "already logged in");
             return true;
         }
 
-        mLastLoginTime = System.currentTimeMillis();
-        String authToken = loginGoogleAccount(activity, false);
+        mLastLoginTime = System.currentTimeMillis();//更新最后登录时间为系统当前的时间
+        String authToken = loginGoogleAccount(activity, false);//判断是否登录到谷歌账户
         if (authToken == null) {
             Log.e(TAG, "login google account failed");
             return false;
         }
 
-        // login with custom domain if necessary
         if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase()
                 .endsWith("googlemail.com"))) {
             StringBuilder url = new StringBuilder(GTASK_URL).append("a/");
@@ -150,8 +168,7 @@ public class GTaskClient {
                 mLoggedin = true;
             }
         }
-
-        // try to login with google official url
+        //如果用户账户无法登录，则使用谷歌官方的URI进行登录
         if (!mLoggedin) {
             mGetUrl = GTASK_GET_URL;
             mPostUrl = GTASK_POST_URL;
@@ -163,7 +180,14 @@ public class GTaskClient {
         mLoggedin = true;
         return true;
     }
-
+     /**
+      * @method          loginGoogleAccount
+      * @description:    具体实现登录谷歌账户的方法
+      * @date:           2023/12/24 23:07
+      * @author:         WuShuxian
+      * @param:          activity
+      * @return:         String
+      */
     private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
         String authToken;
         AccountManager accountManager = AccountManager.get(activity);
@@ -176,6 +200,7 @@ public class GTaskClient {
 
         String accountName = NotesPreferenceActivity.getSyncAccountName(activity);
         Account account = null;
+        //遍历获得的accounts信息，寻找已经记录过的账户信息
         for (Account a : accounts) {
             if (a.name.equals(accountName)) {
                 account = a;
@@ -189,7 +214,7 @@ public class GTaskClient {
             return null;
         }
 
-        // get the token now
+        //获取令牌
         AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,
                 "goanna_mobile", null, activity, null, null);
         try {
@@ -206,11 +231,16 @@ public class GTaskClient {
 
         return authToken;
     }
-
+     /**
+      * @method          tryToLoginGtask
+      * @description:    尝试登陆Gtask，这只是一个预先判断令牌是否是有效以及是否能登上GTask的方法,而不是具体实现登陆的方法
+      * @date:           2023/12/24 21:01
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     private boolean tryToLoginGtask(Activity activity, String authToken) {
         if (!loginGtask(authToken)) {
-            // maybe the auth token is out of date, now let's invalidate the
-            // token and try again
             authToken = loginGoogleAccount(activity, true);
             if (authToken == null) {
                 Log.e(TAG, "login google account failed");
@@ -224,26 +254,33 @@ public class GTaskClient {
         }
         return true;
     }
-
+     /**
+      * @method          loginGtask
+      * @description:    具体实现登录操作
+      * @date:           2023/12/24 21:05
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     private boolean loginGtask(String authToken) {
         int timeoutConnection = 10000;
-        int timeoutSocket = 15000;
-        HttpParams httpParameters = new BasicHttpParams();
-        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
-        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
+        int timeoutSocket = 15000;  //socket是一种通信连接实现数据的交换的端口
+        HttpParams httpParameters = new BasicHttpParams(); //实例化一个新的HTTP参数类
+        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);//设置连接超时时间
+        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);//设置设置端口超时时间
         mHttpClient = new DefaultHttpClient(httpParameters);
         BasicCookieStore localBasicCookieStore = new BasicCookieStore();
         mHttpClient.setCookieStore(localBasicCookieStore);
         HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
 
-        // login gtask
+        //登录操作
         try {
-            String loginUrl = mGetUrl + "?auth=" + authToken;
-            HttpGet httpGet = new HttpGet(loginUrl);
+            String loginUrl = mGetUrl + "?auth=" + authToken;//设置登录的URL
+            HttpGet httpGet = new HttpGet(loginUrl);//通过登录的uri实例化网页上资源的查找
             HttpResponse response = null;
             response = mHttpClient.execute(httpGet);
 
-            // get the cookie now
+            //获取CookieStore里存放的cookie,如果存有“GTL”，则cookie有效
             List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();
             boolean hasAuthCookie = false;
             for (Cookie cookie : cookies) {
@@ -255,7 +292,7 @@ public class GTaskClient {
                 Log.w(TAG, "it seems that there is no auth cookie");
             }
 
-            // get the client version
+            //获取client的内容
             String resString = getResponseContent(response.getEntity());
             String jsBegin = "_setup(";
             String jsEnd = ")}</script>";
@@ -272,7 +309,6 @@ public class GTaskClient {
             e.printStackTrace();
             return false;
         } catch (Exception e) {
-            // simply catch all exceptions
             Log.e(TAG, "httpget gtask_url failed");
             return false;
         }
@@ -283,14 +319,24 @@ public class GTaskClient {
     private int getActionId() {
         return mActionId++;
     }
-
+     /**
+      * @method          createHttpPost
+      * @description:    实例化创建一个用于向网络传输数据的对象
+      * @date:           2023/12/24 23:13
+      * @author:         WuShuxian
+      */
     private HttpPost createHttpPost() {
         HttpPost httpPost = new HttpPost(mPostUrl);
         httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8");
         httpPost.setHeader("AT", "1");
         return httpPost;
     }
-
+     /**
+      * @method          getResponseContent
+      * @description:    通过URL获取响应后返回的数据，也就是网络上的数据和资源
+      * @date:           2023/12/24 21:06
+      * @author:         WuShuxian
+      */
     private String getResponseContent(HttpEntity entity) throws IOException {
         String contentEncoding = null;
         if (entity.getContentEncoding() != null) {
@@ -322,13 +368,20 @@ public class GTaskClient {
             input.close();
         }
     }
-
+     /**
+      * @method          postRequest
+      * @description:    通过Json发送请求
+      * @date:           2023/12/24 21:07
+      * @author:         WuShuxian
+      * @param:          js
+      * @return:
+      */
     private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
         if (!mLoggedin) {
             Log.e(TAG, "please login first");
             throw new ActionFailureException("not logged in");
         }
-
+        //实例化一个httpPost的对象用来向服务器传输数据，在这里就是发送请求，而请求的内容在js里
         HttpPost httpPost = createHttpPost();
         try {
             LinkedList<BasicNameValuePair> list = new LinkedList<BasicNameValuePair>();
@@ -336,9 +389,8 @@ public class GTaskClient {
             UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
             httpPost.setEntity(entity);
 
-            // execute the post
             HttpResponse response = mHttpClient.execute(httpPost);
-            String jsString = getResponseContent(response.getEntity());
+            String jsString = getResponseContent(response.getEntity());//得到返回的数据和资源
             return new JSONObject(jsString);
 
         } catch (ClientProtocolException e) {
@@ -359,21 +411,25 @@ public class GTaskClient {
             throw new ActionFailureException("error occurs when posting request");
         }
     }
-
+     /**
+      * @method          createTask
+      * @description:    创建单个任务
+      * @date:           2023/12/24 21:08
+      * @author:         WuShuxian
+      * @param:          task
+      * @return:         void
+      */
     public void createTask(Task task) throws NetworkFailureException {
         commitUpdate();
         try {
             JSONObject jsPost = new JSONObject();
             JSONArray actionList = new JSONArray();
 
-            // action_list
             actionList.put(task.getCreateAction(getActionId()));
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
 
-            // client_version
             jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
 
-            // post
             JSONObject jsResponse = postRequest(jsPost);
             JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
                     GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
@@ -385,25 +441,29 @@ public class GTaskClient {
             throw new ActionFailureException("create task: handing jsonobject failed");
         }
     }
-
+     /**
+      * @method          createTaskList
+      * @description:    建一个任务列表，与createTask几乎一样，区别就是最后设置的是tasklist的gid
+      * @date:           2023/12/24 21:09
+      * @author:         WuShuxian
+      * @param:          tasklist
+      * @return:         void
+      */
     public void createTaskList(TaskList tasklist) throws NetworkFailureException {
         commitUpdate();
         try {
             JSONObject jsPost = new JSONObject();
             JSONArray actionList = new JSONArray();
 
-            // action_list
             actionList.put(tasklist.getCreateAction(getActionId()));
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
 
-            // client version
             jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
 
-            // post
-            JSONObject jsResponse = postRequest(jsPost);
+            JSONObject jsResponse = postRequest(jsPost);//得到任务的返回信息
             JSONObject jsResult = (JSONObject) jsResponse.getJSONArray(
                     GTaskStringUtils.GTASK_JSON_RESULTS).get(0);
-            tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));
+            tasklist.setGid(jsResult.getString(GTaskStringUtils.GTASK_JSON_NEW_ID));//设置task的new_id
 
         } catch (JSONException e) {
             Log.e(TAG, e.toString());
@@ -417,10 +477,8 @@ public class GTaskClient {
             try {
                 JSONObject jsPost = new JSONObject();
 
-                // action_list
                 jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, mUpdateArray);
 
-                // client_version
                 jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
 
                 postRequest(jsPost);
@@ -432,11 +490,17 @@ public class GTaskClient {
             }
         }
     }
-
+     /**
+      * @method          addUpdateNode
+      * @description:    添加更新的事项
+      * @date:           2023/12/24 23:19
+      * @author:         WuShuxian
+      * @param:          node
+      * @return:         void
+      */
     public void addUpdateNode(Node node) throws NetworkFailureException {
         if (node != null) {
-            // too many update items may result in an error
-            // set max to 10 items
+            //设置更新（同步）项目数量上限：10
             if (mUpdateArray != null && mUpdateArray.length() > 10) {
                 commitUpdate();
             }
@@ -446,7 +510,14 @@ public class GTaskClient {
             mUpdateArray.put(node.getUpdateAction(getActionId()));
         }
     }
-
+     /**
+      * @method          moveTask
+      * @description:    移动task,比如讲task移动到不同的task列表中去
+      * @date:           2023/12/24 23:19
+      * @author:         WuShuxian
+      * @param:          task、preParent、curParent
+      * @return:         void
+      */
     public void moveTask(Task task, TaskList preParent, TaskList curParent)
             throws NetworkFailureException {
         commitUpdate();
@@ -455,26 +526,22 @@ public class GTaskClient {
             JSONArray actionList = new JSONArray();
             JSONObject action = new JSONObject();
 
-            // action_list
+            // 动作序列
             action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
                     GTaskStringUtils.GTASK_JSON_ACTION_TYPE_MOVE);
             action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
             action.put(GTaskStringUtils.GTASK_JSON_ID, task.getGid());
             if (preParent == curParent && task.getPriorSibling() != null) {
-                // put prioring_sibing_id only if moving within the tasklist and
-                // it is not the first one
-                action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
+                action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());//设置优先级ID，只有当移动是发生在文件中
             }
             action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
             action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
             if (preParent != curParent) {
-                // put the dest_list only if moving between tasklists
-                action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
+                action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());//仅当在任务列表之间移动时才放入dest_list
             }
             actionList.put(action);
-            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
+            jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);//将ACTION_LIST加入到jsPost中
 
-            // client_version
             jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
 
             postRequest(jsPost);
@@ -485,22 +552,27 @@ public class GTaskClient {
             throw new ActionFailureException("move task: handing jsonobject failed");
         }
     }
-
+     /**
+      * @method          deleteNode
+      * @description:    删除操作节点
+      * @date:           2023/12/24 23:22
+      * @author:         WuShuxian
+      * @param:          node
+      * @return:         void
+      */
     public void deleteNode(Node node) throws NetworkFailureException {
         commitUpdate();
         try {
             JSONObject jsPost = new JSONObject();
             JSONArray actionList = new JSONArray();
 
-            // action_list
             node.setDeleted(true);
-            actionList.put(node.getUpdateAction(getActionId()));
+            actionList.put(node.getUpdateAction(getActionId()));//获取删除操作的ID，加入actionLiast
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
 
-            // client_version
             jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
 
-            postRequest(jsPost);
+            postRequest(jsPost);//使用postRequest发送删除后的结果
             mUpdateArray = null;
         } catch (JSONException e) {
             Log.e(TAG, e.toString());
@@ -508,7 +580,14 @@ public class GTaskClient {
             throw new ActionFailureException("delete node: handing jsonobject failed");
         }
     }
-
+     /**
+      * @method          getTaskLists
+      * @description:    获取任务列表
+      * @date:           2023/12/24 23:24
+      * @author:         WuShuxian
+      * @param:          void
+      * @return:
+      */
     public JSONArray getTaskLists() throws NetworkFailureException {
         if (!mLoggedin) {
             Log.e(TAG, "please login first");
@@ -520,8 +599,8 @@ public class GTaskClient {
             HttpResponse response = null;
             response = mHttpClient.execute(httpGet);
 
-            // get the task list
-            String resString = getResponseContent(response.getEntity());
+            // 获取任务列表，把筛选出的字符串放入jsString
+            String resString = getResponseContent(response.getEntity());//从网上获取数据
             String jsBegin = "_setup(";
             String jsEnd = ")}</script>";
             int begin = resString.indexOf(jsBegin);
@@ -546,7 +625,14 @@ public class GTaskClient {
             throw new ActionFailureException("get task lists: handing jasonobject failed");
         }
     }
-
+     /**
+      * @method          getTaskList
+      * @description:    通过传入的TASKList的gid,从网络上获取相应属于这个任务列表的任务
+      * @date:           2023/12/24 23:28
+      * @author:         WuShuxian
+      * @param:          listGid
+      * @return:
+      */
     public JSONArray getTaskList(String listGid) throws NetworkFailureException {
         commitUpdate();
         try {
@@ -554,7 +640,6 @@ public class GTaskClient {
             JSONArray actionList = new JSONArray();
             JSONObject action = new JSONObject();
 
-            // action_list
             action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
                     GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
             action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
@@ -563,7 +648,6 @@ public class GTaskClient {
             actionList.put(action);
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
 
-            // client_version
             jsPost.put(GTaskStringUtils.GTASK_JSON_CLIENT_VERSION, mClientVersion);
 
             JSONObject jsResponse = postRequest(jsPost);
diff --git a/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java b/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java
index d2b4082..e7771a2 100644
--- a/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java
+++ b/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java
@@ -47,7 +47,14 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Map;
 
-
+/**
+  * @Package:        net.micode.notes.gtask.remote
+  * @ClassName:      GTaskManager
+  * @Description:    同步管理操作
+  * @Author:         WuShuxian
+  * @CreateDate:     2023/12/24 21:13
+  * @Version:        1.0
+ */
 public class GTaskManager {
     private static final String TAG = GTaskManager.class.getSimpleName();
 
@@ -86,10 +93,17 @@ public class GTaskManager {
     private HashMap<String, Long> mGidToNid;
 
     private HashMap<Long, String> mNidToGid;
-
+     /**
+      * @method          GTaskManager
+      * @description:    构造函数，初始化实例对象
+      * @date:           2023/12/24 23:30
+      * @author:         WuShuxian
+      * @param:          void
+      * @return:         void
+      */
     private GTaskManager() {
-        mSyncing = false;
-        mCancelled = false;
+        mSyncing = false;//正在同步,flase代表未执行
+        mCancelled = false;//全局标识，flase代表可以执行
         mGTaskListHashMap = new HashMap<String, TaskList>();
         mGTaskHashMap = new HashMap<String, Node>();
         mMetaHashMap = new HashMap<String, MetaData>();
@@ -98,7 +112,14 @@ public class GTaskManager {
         mGidToNid = new HashMap<String, Long>();
         mNidToGid = new HashMap<Long, String>();
     }
-
+     /**
+      * @method          getInstance
+      * @description:    包含关键字synchronized，语言级同步，指明该函数可能运行在多线程的环境下
+      * @date:           2023/12/24 23:31
+      * @author:         WuShuxian
+      * @param:          void
+      * @return:         GTaskManager
+      */
     public static synchronized GTaskManager getInstance() {
         if (mInstance == null) {
             mInstance = new GTaskManager();
@@ -107,10 +128,17 @@ public class GTaskManager {
     }
 
     public synchronized void setActivityContext(Activity activity) {
-        // used for getting authtoken
         mActivity = activity;
     }
-
+     /**
+      * @method          sync
+      * @description:    用于同步的核心函数，实现了本地同步操作和远端同步操作
+      * @date:           2023/12/24 23:32
+      * @author:         WuShuxian
+      * @param:          context：获取上下文
+      *                  asyncTask：用于同步的异步操作类
+      * @return:         int
+      */
     public int sync(Context context, GTaskASyncTask asyncTask) {
         if (mSyncing) {
             Log.d(TAG, "Sync is in progress");
@@ -127,8 +155,9 @@ public class GTaskManager {
         mGidToNid.clear();
         mNidToGid.clear();
 
+        //进行同步操作，并作异常处理：网络异常、操作异常
         try {
-            GTaskClient client = GTaskClient.getInstance();
+            GTaskClient client = GTaskClient.getInstance();//创建一个实例：client
             client.resetUpdateArray();
 
             // login google task
@@ -139,18 +168,19 @@ public class GTaskManager {
             }
 
             // get the task list from google
+            //从google获取task list
             asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
             initGTaskList();
 
-            // do content sync work
+            //进行同步操作
             asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
             syncContent();
         } catch (NetworkFailureException e) {
             Log.e(TAG, e.toString());
-            return STATE_NETWORK_ERROR;
+            return STATE_NETWORK_ERROR;//网络异常
         } catch (ActionFailureException e) {
             Log.e(TAG, e.toString());
-            return STATE_INTERNAL_ERROR;
+            return STATE_INTERNAL_ERROR;//操作异常
         } catch (Exception e) {
             Log.e(TAG, e.toString());
             e.printStackTrace();
@@ -167,7 +197,14 @@ public class GTaskManager {
 
         return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
     }
-
+     /**
+      * @method          initGTaskList
+      * @description:    初始化GtaskList，获取Google上的JSONtasklist转为本地TaskList
+      * @date:           2023/12/24 23:39
+      * @author:         WuShuxian
+      * @param:
+      * @return:
+      */
     private void initGTaskList() throws NetworkFailureException {
         if (mCancelled)
             return;
@@ -175,7 +212,7 @@ public class GTaskManager {
         try {
             JSONArray jsTaskLists = client.getTaskLists();
 
-            // init meta list first
+            //初始化元列表
             mMetaList = null;
             for (int i = 0; i < jsTaskLists.length(); i++) {
                 JSONObject object = jsTaskLists.getJSONObject(i);