From b6a8d6098cabfd82ae70f14ad9a2ca83b271f9f8 Mon Sep 17 00:00:00 2001
From: *** <***>
Date: Mon, 12 Oct 2020 08:24:43 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E4=B8=80=E6=AC=A1=E5=8A=A0=E6=B3=A8?=
 =?UTF-8?q?=E9=87=8A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/net/micode/notes/data/Contact.java        |  24 +-
 src/net/micode/notes/data/Notes.java          | 102 +++++--
 .../notes/data/NotesDatabaseHelper.java       |  65 ++--
 src/net/micode/notes/data/NotesProvider.java  |  46 ++-
 src/net/micode/notes/gtask/data/MetaData.java |  82 ++++-
 src/net/micode/notes/gtask/data/Node.java     |  30 +-
 src/net/micode/notes/gtask/data/SqlData.java  |  77 ++++-
 src/net/micode/notes/gtask/data/SqlNote.java  | 130 +++++++-
 src/net/micode/notes/gtask/data/Task.java     |  24 +-
 src/net/micode/notes/gtask/data/TaskList.java |  71 ++++-
 .../exception/ActionFailureException.java     |  17 +-
 .../exception/NetworkFailureException.java    |  14 +
 .../notes/gtask/remote/GTaskASyncTask.java    |  41 +--
 .../notes/gtask/remote/GTaskClient.java       | 193 ++++++++----
 .../notes/gtask/remote/GTaskManager.java      | 225 ++++++++++----
 .../notes/gtask/remote/GTaskSyncService.java  |  43 ++-
 src/net/micode/notes/model/Note.java          |  72 ++---
 src/net/micode/notes/model/WorkingNote.java   |  89 ++++--
 src/net/micode/notes/tool/BackupUtils.java    |  69 +++--
 src/net/micode/notes/tool/DataUtils.java      |  57 ++--
 .../micode/notes/tool/GTaskStringUtils.java   |   5 +-
 src/net/micode/notes/tool/ResourceParser.java |  23 +-
 .../micode/notes/ui/AlarmAlertActivity.java   |  65 +++-
 .../micode/notes/ui/AlarmInitReceiver.java    |  15 +-
 src/net/micode/notes/ui/AlarmReceiver.java    |  12 +-
 src/net/micode/notes/ui/DateTimePicker.java   |  72 +++--
 .../micode/notes/ui/DateTimePickerDialog.java |  19 +-
 src/net/micode/notes/ui/DropdownMenu.java     |  10 +-
 .../micode/notes/ui/FoldersListAdapter.java   |  19 +-
 src/net/micode/notes/ui/NoteEditActivity.java | 288 +++++++++++++++---
 src/net/micode/notes/ui/NoteEditText.java     |  93 +++++-
 src/net/micode/notes/ui/NoteItemData.java     |  30 +-
 .../micode/notes/ui/NotesListActivity.java    | 106 +++++--
 src/net/micode/notes/ui/NotesListAdapter.java | 102 ++++++-
 src/net/micode/notes/ui/NotesListItem.java    |  50 +--
 .../notes/ui/NotesPreferenceActivity.java     | 192 ++++++++++--
 .../notes/widget/NoteWidgetProvider_4x.java   |   2 +-
 37 files changed, 2008 insertions(+), 566 deletions(-)

diff --git a/src/net/micode/notes/data/Contact.java b/src/net/micode/notes/data/Contact.java
index d97ac5d..dc1eb30 100644
--- a/src/net/micode/notes/data/Contact.java
+++ b/src/net/micode/notes/data/Contact.java
@@ -17,6 +17,7 @@
 package net.micode.notes.data;
 
 import android.content.Context;
+
 import android.database.Cursor;
 import android.provider.ContactsContract.CommonDataKinds.Phone;
 import android.provider.ContactsContract.Data;
@@ -24,47 +25,58 @@ import android.telephony.PhoneNumberUtils;
 import android.util.Log;
 
 import java.util.HashMap;
-
-public class Contact {
+//change
+public class Contact { //联系人
     private static HashMap<String, String> sContactCache;
     private static final String TAG = "Contact";
 
-    private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+    // 定义字符串CALLER_ID_SELECTION
+    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
     public static String getContact(Context context, String phoneNumber) {
         if(sContactCache == null) {
             sContactCache = new HashMap<String, String>();
         }
-
+        
+        // 查找HashMap中是否已有phoneNumber信息
         if(sContactCache.containsKey(phoneNumber)) {
             return sContactCache.get(phoneNumber);
         }
 
         String selection = CALLER_ID_SELECTION.replace("+",
                 PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+        // 查找数据库中phoneNumber的信息
         Cursor cursor = context.getContentResolver().query(
                 Data.CONTENT_URI,
                 new String [] { Phone.DISPLAY_NAME },
                 selection,
                 new String[] { phoneNumber },
                 null);
-
+        
+        // 判定查询结果 
+        // moveToFirst()返回第一条
         if (cursor != null && cursor.moveToFirst()) {
             try {
+            // 找到相关信息
                 String name = cursor.getString(0);
                 sContactCache.put(phoneNumber, name);
                 return name;
+            // 异常
             } catch (IndexOutOfBoundsException e) {
                 Log.e(TAG, " Cursor get string error " + e.toString());
                 return null;
             } finally {
                 cursor.close();
             }
+            // 未找到相关信息
         } else {
             Log.d(TAG, "No contact matched with number:" + phoneNumber);
             return null;
diff --git a/src/net/micode/notes/data/Notes.java b/src/net/micode/notes/data/Notes.java
index f240604..fb90c63 100644
--- a/src/net/micode/notes/data/Notes.java
+++ b/src/net/micode/notes/data/Notes.java
@@ -16,10 +16,14 @@
 
 package net.micode.notes.data;
 
+import android.content.ContentUris;
 import android.net.Uri;
+// Notes 类中定义了很多常量，这些常量大多是int型和string型
 public class Notes {
     public static final String AUTHORITY = "micode_notes";
     public static final String TAG = "Notes";
+    
+    //以下三个常量对NoteColumns.TYPE的值进行设置时会用到
     public static final int TYPE_NOTE     = 0;
     public static final int TYPE_FOLDER   = 1;
     public static final int TYPE_SYSTEM   = 2;
@@ -35,12 +39,24 @@ public class Notes {
     public static final int ID_CALL_RECORD_FOLDER = -2;
     public static final int ID_TRASH_FOLER = -3;
 
-    public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
-    public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
-    public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
-    public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
-    public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
-    public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
+    public static final String INTENT_EXTRA_ALERT_DATE = 
+
+"net.micode.notes.alert_date";
+    public static final String INTENT_EXTRA_BACKGROUND_ID = 
+
+"net.micode.notes.background_color_id";
+    public static final String INTENT_EXTRA_WIDGET_ID = 
+
+"net.micode.notes.widget_id";
+    public static final String INTENT_EXTRA_WIDGET_TYPE = 
+
+"net.micode.notes.widget_type";
+    public static final String INTENT_EXTRA_FOLDER_ID = 
+
+"net.micode.notes.folder_id";
+    public static final String INTENT_EXTRA_CALL_DATE = 
+
+"net.micode.notes.call_date";
 
     public static final int TYPE_WIDGET_INVALIDE      = -1;
     public static final int TYPE_WIDGET_2X            = 0;
@@ -54,13 +70,25 @@ public class Notes {
     /**
      * Uri to query all notes and folders
      */
-    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + 
 
+AUTHORITY + "/note");//定义查询便签和文件夹的指针。
+
+    
+    
+//    public static final Uri my_URI = ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI , 10);
+    
+    
+    
+    
     /**
      * Uri to query data
      */
-    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + 
+
+AUTHORITY + "/data");//定义查找数据的指针。
 
+    // 定义NoteColumns的常量,用于后面创建数据库的表头
     public interface NoteColumns {
         /**
          * The unique ID for a row
@@ -72,7 +100,7 @@ public class Notes {
          * The parent's id for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String PARENT_ID = "parent_id";
+        public static final String PARENT_ID = "parent_id";//为什么会有parent_id
 
         /**
          * Created data for note or folder
@@ -140,7 +168,7 @@ public class Notes {
          * The last sync id
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String SYNC_ID = "sync_id";
+        public static final String SYNC_ID = "sync_id";//同步
 
         /**
          * Sign to indicate local modified or not
@@ -165,8 +193,9 @@ public class Notes {
          * <P> Type : INTEGER (long) </P>
          */
         public static final String VERSION = "version";
-    }
+    }//这些常量主要是定义便签的属性的。
 
+    // 定义DataColumns的常量,用于后面创建数据库的表头
     public interface DataColumns {
         /**
          * The unique ID for a row
@@ -206,41 +235,50 @@ public class Notes {
 
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 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
+         * 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
+         * 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
+         * 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
+         * Generic data column, the meaning is {@link #MIMETYPE} specific, 
+
+used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
         public static final String DATA5 = "data5";
-    }
-
+    }//主要是定义存储便签内容数据的
     public static final class TextNote implements DataColumns {
         /**
          * Mode to indicate the text in check list mode or not
@@ -250,12 +288,18 @@ public class Notes {
 
         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_TYPE = 
 
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+"vnd.android.cursor.dir/text_note";
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/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");
+    }//文本内容的数据结构
 
     public static final class CallNote implements DataColumns {
         /**
@@ -270,10 +314,16 @@ public class Notes {
          */
         public static final String PHONE_NUMBER = DATA3;
 
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
+        public static final String CONTENT_TYPE = 
 
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
+"vnd.android.cursor.dir/call_note";
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/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");
+    }//电话内容的数据结构
 }
diff --git a/src/net/micode/notes/data/NotesDatabaseHelper.java b/src/net/micode/notes/data/NotesDatabaseHelper.java
index ffe5d57..5761f90 100644
--- a/src/net/micode/notes/data/NotesDatabaseHelper.java
+++ b/src/net/micode/notes/data/NotesDatabaseHelper.java
@@ -16,23 +16,23 @@
 
 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.content.ContentValues;//就是用于保存一些数据（string boolean byte double float int long short ...）信息，这些信息可以被数据库操作时使用。
+import android.content.Context;//加载和访问资源。（android中主要是这两个功能，但是这里具体不清楚）
+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;
 
 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，用SQLOpenhelper,对一些note和文件进行数据库的操作，比如删除文件后，将文件里的note也相应删除
 
 public class NotesDatabaseHelper extends SQLiteOpenHelper {
     private static final String DB_NAME = "note.db";
 
     private static final int DB_VERSION = 4;
 
-    public interface TABLE {
+    public interface TABLE {    //接口，分成note和data，在后面的程序里分别使用过
         public static final String NOTE = "note";
 
         public static final String DATA = "data";
@@ -61,7 +61,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
             NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
             NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
-        ")";
+        ")";//数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容。
 
     private static final String CREATE_DATA_TABLE_SQL =
         "CREATE TABLE " + TABLE.DATA + "(" +
@@ -76,11 +76,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
             DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
             DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
-        ")";
+        ")";//和上面的功能一样，主要是存储的项目不同
 
     private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
         "CREATE INDEX IF NOT EXISTS note_id_index ON " +
-        TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
+        TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格
 
     /**
      * Increase folder's note count when move note to the folder
@@ -92,7 +92,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
         "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
-        " END";
+        " END";//在文件夹中移入一个Note之后需要更改的数据的表格。
 
     /**
      * Decrease folder's note count when move note from folder
@@ -105,7 +105,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
         "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
         "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
-        " END";
+        " END";//在文件夹中移出一个Note之后需要更改的数据的表格。
 
     /**
      * Increase folder's note count when insert new note to the folder
@@ -117,7 +117,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
         "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
-        " END";
+        " END";//在文件夹中插入一个Note之后需要更改的数据的表格。
 
     /**
      * Decrease folder's note count when delete note from the folder
@@ -130,7 +130,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
         "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
         "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
-        " END";
+        " END";//在文件夹中删除一个Note之后需要更改的数据的表格。
 
     /**
      * Update note's content when insert data with type {@link DataConstants#NOTE}
@@ -143,7 +143,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
         "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+        " END";//在文件夹中对一个Note导入新的数据之后需要更改的数据的表格。
 
     /**
      * Update note's content when data with {@link DataConstants#NOTE} type has changed
@@ -156,7 +156,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
         "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+        " END";//Note数据被修改后需要更改的数据的表格。
 
     /**
      * Update note's content when data with {@link DataConstants#NOTE} type has deleted
@@ -169,7 +169,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.SNIPPET + "=''" +
         "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
-        " END";
+        " END";//Note数据被删除后需要更改的数据的表格。
 
     /**
      * Delete datas belong to note which has been deleted
@@ -180,7 +180,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         " BEGIN" +
         "  DELETE FROM " + TABLE.DATA +
         "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+        " END";//删除已删除的便签的数据后需要更改的数据的表格。
 
     /**
      * Delete notes belong to folder which has been deleted
@@ -191,7 +191,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         " BEGIN" +
         "  DELETE FROM " + TABLE.NOTE +
         "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+        " END";//删除已删除的文件夹的便签后需要更改的数据的表格。
 
     /**
      * Move notes belong to folder which has been moved to trash folder
@@ -204,18 +204,18 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         "  UPDATE " + TABLE.NOTE +
         "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
         "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+        " END";//还原垃圾桶中便签后需要更改的数据的表格。
 
     public NotesDatabaseHelper(Context context) {
         super(context, DB_NAME, null, DB_VERSION);
-    }
+    }//构造函数，传入数据库的名称和版本
 
     public void createNoteTable(SQLiteDatabase db) {
         db.execSQL(CREATE_NOTE_TABLE_SQL);
         reCreateNoteTableTriggers(db);
         createSystemFolder(db);
         Log.d(TAG, "note table has been created");
-    }
+    }//创建表格（用来存储标签属性）
 
     private void reCreateNoteTableTriggers(SQLiteDatabase db) {
         db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
@@ -233,7 +233,8 @@ 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);
-    }
+    }//execSQL是数据库操作的API，主要是更改行为的SQL语句。
+    //在这里主要是用来重新创建上述定义的表格用的，先删除原来有的数据库的触发器再重新创建新的数据库
 
     private void createSystemFolder(SQLiteDatabase db) {
         ContentValues values = new ContentValues();
@@ -268,14 +269,14 @@ 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);
-    }
+    }//创建几个系统文件夹
 
     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");
-    }
+    }//创建表格（用来存储标签内容）
 
     private void reCreateDataTableTriggers(SQLiteDatabase db) {
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
@@ -285,20 +286,22 @@ 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);
-    }
+    }//同上面的execSQL
 
     static synchronized NotesDatabaseHelper getInstance(Context context) {
         if (mInstance == null) {
             mInstance = new NotesDatabaseHelper(context);
         }
         return mInstance;
-    }
+    }//上网查是为解决同一时刻只能有一个线程执行.
+     //在写程序库代码时，有时有一个类需要被所有的其它类使用，
+     //但又要求这个类只能被实例化一次，是个服务类，定义一次，其它类使用同一个这个类的实例
 
     @Override
     public void onCreate(SQLiteDatabase db) {
         createNoteTable(db);
         createDataTable(db);
-    }
+    }//实现两个表格（上面创建的两个表格）
 
     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
@@ -331,14 +334,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
             throw new IllegalStateException("Upgrade notes database to version " + newVersion
                     + "fails");
         }
-    }
+    }//数据库版本的更新（数据库内容的更改）
 
     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版本
 
     private void upgradeToV3(SQLiteDatabase db) {
         // drop unused triggers
@@ -353,10 +356,10 @@ 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版本
 
     private void upgradeToV4(SQLiteDatabase db) {
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
                 + " INTEGER NOT NULL DEFAULT 0");
-    }
+    }//更新到V4版本,但是不知道V2、V3、V4是什么意思
 }
diff --git a/src/net/micode/notes/data/NotesProvider.java b/src/net/micode/notes/data/NotesProvider.java
index edb0a60..e06717b 100644
--- a/src/net/micode/notes/data/NotesProvider.java
+++ b/src/net/micode/notes/data/NotesProvider.java
@@ -33,9 +33,15 @@ 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
 public class NotesProvider extends ContentProvider {
+	// UriMatcher用于匹配Uri
     private static final UriMatcher mMatcher;
 
     private NotesDatabaseHelper mHelper;
@@ -51,7 +57,9 @@ 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);
@@ -65,6 +73,7 @@ public class NotesProvider extends ContentProvider {
      * 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 + ","
@@ -72,7 +81,7 @@ public class NotesProvider extends ContentProvider {
         + 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
     private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
         + " FROM " + TABLE.NOTE
         + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
@@ -80,18 +89,24 @@ public class NotesProvider extends ContentProvider {
         + " 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;
     }
 
     @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) {
         Cursor c = null;
+        // 获取可读数据库
         SQLiteDatabase db = mHelper.getReadableDatabase();
         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);
@@ -113,6 +128,7 @@ 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");
                 }
@@ -120,6 +136,8 @@ 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 {
@@ -139,6 +157,7 @@ public class NotesProvider extends ContentProvider {
                 }
                 break;
             default:
+            	// 抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (c != null) {
@@ -148,13 +167,17 @@ public class NotesProvider extends ContentProvider {
     }
 
     @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);
@@ -163,10 +186,11 @@ public class NotesProvider extends ContentProvider {
                 }
                 insertedId = dataId = db.insert(TABLE.DATA, null, values);
                 break;
-            default:
+           default:
                 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);
@@ -178,13 +202,17 @@ 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);
     }
 
     @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)) {
@@ -228,6 +256,7 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
+    // 更新一个uri
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
@@ -266,11 +295,13 @@ 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 ");
@@ -292,7 +323,8 @@ 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());
     }
 
diff --git a/src/net/micode/notes/gtask/data/MetaData.java b/src/net/micode/notes/gtask/data/MetaData.java
index 3a2050b..924b4d0 100644
--- a/src/net/micode/notes/gtask/data/MetaData.java
+++ b/src/net/micode/notes/gtask/data/MetaData.java
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,6 +12,13 @@
  * 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.
+ * 
+ * Description： 
+ * 元数据（Metadata），又称中介数据、中继数据，为描述数据的数据（data about data）
+ * 主要是描述数据属性（property）的信息，用来支持如指示存储位置、历史数据、资源查找、文件记录等功能。
+ * 元数据算是一种电子式目录，为了达到编制目录的目的，必须在描述并收藏数据的内容或特色，进而达成协助数据检索的目的。
+ * 本类继承于Task,主要用于记录数据的变化
+ * Made By Cuican
  */
 
 package net.micode.notes.gtask.data;
@@ -24,31 +31,59 @@ import net.micode.notes.tool.GTaskStringUtils;
 import org.json.JSONException;
 import org.json.JSONObject;
 
-
 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
+	 * Made By CuiCan
+	 */
     private final static String TAG = MetaData.class.getSimpleName();
-
     private String mRelatedGid = null;
-
-    public void setMeta(String gid, JSONObject metaInfo) {
+    /*
+     * 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： 
+     * Made By CuiCan
+     */
+    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
+             * Made By Cui Can
+             */
         }
         setNotes(metaInfo.toString());
         setName(GTaskStringUtils.META_NOTE_NAME);
     }
-
+    /*
+     * 功能描述：获取相关联的Gid
+     * Made By CuiCan
+     */
     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： 
+     * Made By CuiCan
+     */
     @Override
     public void setContentByRemoteJSON(JSONObject js) {
         super.setContentByRemoteJSON(js);
@@ -58,25 +93,50 @@ public class MetaData extends Task {
                 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
+                 * Made By Cui Can
+                 */
                 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
+         * Made By Cui Can
+         */
     }
-
+    /*
+     * 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
+         */
     }
 
 }
diff --git a/src/net/micode/notes/gtask/data/Node.java b/src/net/micode/notes/gtask/data/Node.java
index 63950e0..3b7baca 100644
--- a/src/net/micode/notes/gtask/data/Node.java
+++ b/src/net/micode/notes/gtask/data/Node.java
@@ -20,32 +20,38 @@ 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
+ * @author TTS
+ */
 public abstract class Node {
-    public static final int SYNC_ACTION_NONE = 0;
-
-    public static final int SYNC_ACTION_ADD_REMOTE = 1;
+	//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;
+    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;
+    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;
+    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;
+    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;
+    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;
+    public static final int SYNC_ACTION_UPDATE_CONFLICT = 7;// 同步出现冲突
 
-    public static final int SYNC_ACTION_ERROR = 8;
+    public static final int SYNC_ACTION_ERROR = 8;// 同步出现错误
 
     private String mGid;
 
     private String mName;
 
-    private long mLastModified;
+    private long mLastModified;//记录最后一次修改时间
 
-    private boolean mDeleted;
+    private boolean mDeleted;//表征是否被删除
 
     public Node() {
         mGid = null;
diff --git a/src/net/micode/notes/gtask/data/SqlData.java b/src/net/micode/notes/gtask/data/SqlData.java
index d3ec3be..4a44201 100644
--- a/src/net/micode/notes/gtask/data/SqlData.java
+++ b/src/net/micode/notes/gtask/data/SqlData.java
@@ -12,10 +12,19 @@
  * 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.
+ * 
+ * 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
+ */
 import android.content.ContentResolver;
 import android.content.ContentUris;
 import android.content.ContentValues;
@@ -34,17 +43,30 @@ import net.micode.notes.gtask.exception.ActionFailureException;
 import org.json.JSONException;
 import org.json.JSONObject;
 
-
 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;
+    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;
@@ -56,7 +78,7 @@ public class SqlData {
     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;
@@ -71,10 +93,17 @@ public class SqlData {
 
     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 = INVALID_ID;//mDataId置初始值-99999
         mDataMimeType = DataConstants.NOTE;
         mDataContent = "";
         mDataContentData1 = 0;
@@ -82,6 +111,14 @@ public class SqlData {
         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;
@@ -89,6 +126,11 @@ public class SqlData {
         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);
@@ -97,7 +139,14 @@ public class SqlData {
         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);
@@ -130,11 +179,18 @@ public class SqlData {
         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);
@@ -144,6 +200,11 @@ public class SqlData {
         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) {
@@ -183,6 +244,12 @@ public class SqlData {
         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;
     }
diff --git a/src/net/micode/notes/gtask/data/SqlNote.java b/src/net/micode/notes/gtask/data/SqlNote.java
index 79a4095..6e6452c 100644
--- a/src/net/micode/notes/gtask/data/SqlNote.java
+++ b/src/net/micode/notes/gtask/data/SqlNote.java
@@ -12,10 +12,18 @@
  * 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.
+ * 
+ * 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。
+ * 和SqlData相比，SqlNote算是真正意义上的数据了。
  */
 
 package net.micode.notes.gtask.data;
-
+/*
+ * 功能描述：
+ * 实现过程：
+ * 参数注解： 
+ * Made By CuiCan
+ */
 import android.appwidget.AppWidgetManager;
 import android.content.ContentResolver;
 import android.content.ContentValues;
@@ -37,12 +45,16 @@ import org.json.JSONObject;
 
 import java.util.ArrayList;
 
-
 public class SqlNote {
+	/*
+	 * 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 = SqlNote.class.getSimpleName();
 
     private static final int INVALID_ID = -99999;
-
+    // 集合了interface NoteColumns中所有SF常量（17个）
     public static final String[] PROJECTION_NOTE = new String[] {
             NoteColumns.ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID,
             NoteColumns.CREATED_DATE, NoteColumns.HAS_ATTACHMENT, NoteColumns.MODIFIED_DATE,
@@ -52,6 +64,7 @@ public class SqlNote {
             NoteColumns.VERSION
     };
 
+    //以下设置17个列的编号
     public static final int ID_COLUMN = 0;
 
     public static final int ALERTED_DATE_COLUMN = 1;
@@ -86,6 +99,7 @@ public class SqlNote {
 
     public static final int VERSION_COLUMN = 16;
 
+    //一下定义了17个内部的变量，其中12个可以由content中获得，5个需要初始化为0或者new
     private Context mContext;
 
     private ContentResolver mContentResolver;
@@ -122,6 +136,13 @@ public class SqlNote {
 
     private ArrayList<SqlData> mDataList;
 
+    /*
+     * 功能描述：构造函数
+     * 参数注解： mIsCreate用于标示构造方式
+     * 参数注解： 
+     * Made By CuiCan
+     */
+    //构造函数只有context，对所有的变量进行初始化
     public SqlNote(Context context) {
         mContext = context;
         mContentResolver = context.getContentResolver();
@@ -129,9 +150,9 @@ public class SqlNote {
         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;
@@ -143,17 +164,33 @@ public class SqlNote {
         mDataList = new ArrayList<SqlData>();
     }
 
+
+    /*
+     * 功能描述：构造函数
+     * 参数注解： mIsCreate用于标示构造方式
+     * 参数注解： 
+     * Made By CuiCan
+     */
+    //构造函数有context和一个数据库的cursor，多数变量通过cursor指向的一条记录直接进行初始化
     public SqlNote(Context context, Cursor c) {
         mContext = context;
         mContentResolver = context.getContentResolver();
         mIsCreate = false;
         loadFromCursor(c);
         mDataList = new ArrayList<SqlData>();
+        //
         if (mType == Notes.TYPE_NOTE)
             loadDataContent();
         mDiffNoteValues = new ContentValues();
     }
 
+
+    /*
+     * 功能描述：构造函数
+     * 参数注解： mIsCreate用于标示构造方式
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public SqlNote(Context context, long id) {
         mContext = context;
         mContentResolver = context.getContentResolver();
@@ -166,16 +203,21 @@ public class SqlNote {
 
     }
 
+    /*
+     * 功能描述：通过id从光标处加载数据
+     * Made By CuiCan
+     */
     private void loadFromCursor(long id) {
         Cursor c = null;
         try {
             c = mContentResolver.query(Notes.CONTENT_NOTE_URI, PROJECTION_NOTE, "(_id=?)",
                     new String[] {
                         String.valueOf(id)
-                    }, null);
+                    }, null);//通过id获得对应的ContentResolver中的cursor
             if (c != null) {
                 c.moveToNext();
-                loadFromCursor(c);
+                loadFromCursor(c);//然后加载数据进行初始化，这样函数
+                //SqlNote(Context context, long id)与SqlNote(Context context, long id)的实现方式基本相同
             } else {
                 Log.w(TAG, "loadFromCursor: cursor = null");
             }
@@ -185,7 +227,12 @@ public class SqlNote {
         }
     }
 
+    /*
+     * 功能描述：通过游标从光标处加载数据
+     * Made By CuiCan
+     */
     private void loadFromCursor(Cursor c) {
+    	//直接从一条记录中的获得以下变量的初始值
         mId = c.getLong(ID_COLUMN);
         mAlertDate = c.getLong(ALERTED_DATE_COLUMN);
         mBgColorId = c.getInt(BG_COLOR_ID_COLUMN);
@@ -200,6 +247,11 @@ public class SqlNote {
         mVersion = c.getLong(VERSION_COLUMN);
     }
 
+    /*
+     * 功能描述：通过content机制获取共享数据并加载到数据库当前游标处
+     * 参数注解： 
+     * Made By CuiCan
+     */
     private void loadDataContent() {
         Cursor c = null;
         mDataList.clear();
@@ -226,6 +278,11 @@ public class SqlNote {
         }
     }
 
+    /*
+     * 功能描述：设置通过content机制用于共享的数据信息
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public boolean setContent(JSONObject js) {
         try {
             JSONObject note = js.getJSONObject(GTaskStringUtils.META_HEAD_NOTE);
@@ -267,7 +324,6 @@ public class SqlNote {
                     mDiffNoteValues.put(NoteColumns.BG_COLOR_ID, bgColorId);
                 }
                 mBgColorId = bgColorId;
-
                 long createDate = note.has(NoteColumns.CREATED_DATE) ? note
                         .getLong(NoteColumns.CREATED_DATE) : System.currentTimeMillis();
                 if (mIsCreate || mCreatedDate != createDate) {
@@ -359,6 +415,11 @@ public class SqlNote {
         return true;
     }
 
+    /*
+     * 功能描述：获取content机制提供的数据并加载到note中
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public JSONObject getContent() {
         try {
             JSONObject js = new JSONObject();
@@ -369,7 +430,7 @@ public class SqlNote {
             }
 
             JSONObject note = new JSONObject();
-            if (mType == Notes.TYPE_NOTE) {
+            if (mType == Notes.TYPE_NOTE) {//类型为note时
                 note.put(NoteColumns.ID, mId);
                 note.put(NoteColumns.ALERTED_DATE, mAlertDate);
                 note.put(NoteColumns.BG_COLOR_ID, mBgColorId);
@@ -392,7 +453,7 @@ public class SqlNote {
                     }
                 }
                 js.put(GTaskStringUtils.META_HEAD_DATA, dataArray);
-            } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {
+            } else if (mType == Notes.TYPE_FOLDER || mType == Notes.TYPE_SYSTEM) {//类型为文件夹或者
                 note.put(NoteColumns.ID, mId);
                 note.put(NoteColumns.TYPE, mType);
                 note.put(NoteColumns.SNIPPET, mSnippet);
@@ -407,39 +468,84 @@ public class SqlNote {
         return null;
     }
 
+    /*
+     * 功能描述：给当前id设置父id
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public void setParentId(long id) {
         mParentId = id;
         mDiffNoteValues.put(NoteColumns.PARENT_ID, id);
     }
 
+    /*
+     * 功能描述：给当前id设置Gtaskid
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public void setGtaskId(String gid) {
         mDiffNoteValues.put(NoteColumns.GTASK_ID, gid);
     }
 
+    /*
+     * 功能描述：给当前id设置同步id
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public void setSyncId(long syncId) {
         mDiffNoteValues.put(NoteColumns.SYNC_ID, syncId);
     }
 
+    /*
+     * 功能描述：初始化本地修改，即撤销所有当前修改
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public void resetLocalModified() {
         mDiffNoteValues.put(NoteColumns.LOCAL_MODIFIED, 0);
     }
 
+    /*
+     * 功能描述：获得当前id
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public long getId() {
         return mId;
     }
 
+    /*
+     * 功能描述：获得当前id的父id
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public long getParentId() {
         return mParentId;
     }
 
+    /*
+     * 功能描述：获取小片段即用于显示的部分便签内容
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public String getSnippet() {
         return mSnippet;
     }
 
+    /*
+     * 功能描述：判断是否为便签类型
+     * 参数注解： 
+     * Made By CuiCan
+     */
     public boolean isNoteType() {
         return mType == Notes.TYPE_NOTE;
     }
 
+    /*
+     * 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(boolean validateVersion) {
         if (mIsCreate) {
             if (mId == INVALID_ID && mDiffNoteValues.containsKey(NoteColumns.ID)) {
@@ -458,7 +564,7 @@ public class SqlNote {
             }
 
             if (mType == Notes.TYPE_NOTE) {
-                for (SqlData sqlData : mDataList) {
+                for (SqlData sqlData : mDataList) {//直接使用sqldata中的实现
                     sqlData.commit(mId, false, -1);
                 }
             }
@@ -470,7 +576,7 @@ public class SqlNote {
             if (mDiffNoteValues.size() > 0) {
                 mVersion ++;
                 int result = 0;
-                if (!validateVersion) {
+                if (!validateVersion) {//构造字符串
                     result = mContentResolver.update(Notes.CONTENT_NOTE_URI, mDiffNoteValues, "("
                             + NoteColumns.ID + "=?)", new String[] {
                         String.valueOf(mId)
diff --git a/src/net/micode/notes/gtask/data/Task.java b/src/net/micode/notes/gtask/data/Task.java
index 6a19454..513d5c5 100644
--- a/src/net/micode/notes/gtask/data/Task.java
+++ b/src/net/micode/notes/gtask/data/Task.java
@@ -32,25 +32,29 @@ import org.json.JSONException;
 import org.json.JSONObject;
 
 
+/**
+ * @author k
+ * 
+ */
 public class Task extends Node {
     private static final String TAG = Task.class.getSimpleName();
 
-    private boolean mCompleted;
+    private boolean mCompleted;//是否完成
 
     private String mNotes;
 
-    private JSONObject mMetaInfo;
+    private JSONObject mMetaInfo;//将在实例中存储数据的类型
 
-    private Task mPriorSibling;
+    private Task mPriorSibling;//对应的优先兄弟Task的指针（待完善）
 
-    private TaskList mParent;
+    private TaskList mParent;//所在的任务列表的指针
 
     public Task() {
         super();
         mCompleted = false;
         mNotes = null;
-        mPriorSibling = null;
-        mParent = null;
+        mPriorSibling = null;//TaskList中当前Task前面的Task的指针
+        mParent = null;//当前Task所在的TaskList
         mMetaInfo = null;
     }
 
@@ -80,14 +84,18 @@ public class Task extends Node {
             js.put(GTaskStringUtils.GTASK_JSON_ENTITY_DELTA, entity);
 
             // parent_id
+            if (mParent!= null) {
             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
+            if (mParent!= null) {
             js.put(GTaskStringUtils.GTASK_JSON_LIST_ID, mParent.getGid());
+            }
 
             // prior_sibling_id
             if (mPriorSibling != null) {
@@ -175,7 +183,7 @@ public class Task extends Node {
         }
     }
 
-    public void setContentByLocalJSON(JSONObject js) {
+    public void setContentByLocalJSON(JSONObject js) {    //��metadata����ʵʩ
         if (js == null || !js.has(GTaskStringUtils.META_HEAD_NOTE)
                 || !js.has(GTaskStringUtils.META_HEAD_DATA)) {
             Log.w(TAG, "setContentByLocalJSON: nothing is avaiable");
@@ -186,7 +194,7 @@ public class Task extends Node {
             JSONArray dataArray = js.getJSONArray(GTaskStringUtils.META_HEAD_DATA);
 
             if (note.getInt(NoteColumns.TYPE) != Notes.TYPE_NOTE) {
-                Log.e(TAG, "invalid type");
+                Log.e(TAG, "invalid type"); 
                 return;
             }
 
diff --git a/src/net/micode/notes/gtask/data/TaskList.java b/src/net/micode/notes/gtask/data/TaskList.java
index 4ea21c5..7baf535 100644
--- a/src/net/micode/notes/gtask/data/TaskList.java
+++ b/src/net/micode/notes/gtask/data/TaskList.java
@@ -30,12 +30,16 @@ import org.json.JSONObject;
 import java.util.ArrayList;
 
 
+/**
+ * @author k
+ * 
+ */
 public class TaskList extends Node {
-    private static final String TAG = TaskList.class.getSimpleName();
+    private static final String TAG = TaskList.class.getSimpleName();//tag标记
 
-    private int mIndex;
+    private int mIndex;//当前TaskList的指针
 
-    private ArrayList<Task> mChildren;
+    private ArrayList<Task> mChildren;//类中主要的保存数据的单元，用来实现一个以Task为元素的ArrayList
 
     public TaskList() {
         super();
@@ -43,6 +47,10 @@ public class TaskList extends Node {
         mIndex = 1;
     }
 
+    /* (non-Javadoc)
+     * @see net.micode.notes.gtask.data.Node#getCreateAction(int)
+     * 生成并返回一个包含了一定数据的JSONObject实体
+     */
     public JSONObject getCreateAction(int actionId) {
         JSONObject js = new JSONObject();
 
@@ -58,7 +66,7 @@ public class TaskList extends Node {
             js.put(GTaskStringUtils.GTASK_JSON_INDEX, mIndex);
 
             // entity_delta
-            JSONObject entity = new JSONObject();
+            JSONObject entity = new JSONObject();//entity实体
             entity.put(GTaskStringUtils.GTASK_JSON_NAME, getName());
             entity.put(GTaskStringUtils.GTASK_JSON_CREATOR_ID, "null");
             entity.put(GTaskStringUtils.GTASK_JSON_ENTITY_TYPE,
@@ -74,6 +82,10 @@ public class TaskList extends Node {
         return js;
     }
 
+    /* (non-Javadoc)
+     * @see net.micode.notes.gtask.data.Node#getUpdateAction(int)
+     * 生成并返回一个包含了一定数据的JSONObject实体
+     */
     public JSONObject getUpdateAction(int actionId) {
         JSONObject js = new JSONObject();
 
@@ -216,10 +228,19 @@ public class TaskList extends Node {
         return SYNC_ACTION_ERROR;
     }
 
+    /**
+     * @return
+     * 功能：获得TaskList的大小，即mChildren的大小
+     */
     public int getChildTaskCount() {
         return mChildren.size();
     }
 
+    /**
+     * @param task
+     * @return 返回值为是否成功添加任务。
+     * 功能：在当前任务表末尾添加新的任务。
+     */
     public boolean addChildTask(Task task) {
         boolean ret = false;
         if (task != null && !mChildren.contains(task)) {
@@ -229,11 +250,19 @@ public class TaskList extends Node {
                 task.setPriorSibling(mChildren.isEmpty() ? null : mChildren
                         .get(mChildren.size() - 1));
                 task.setParent(this);
+                //注意：每一次ArrayList的变化都要紧跟相关Task中PriorSibling的更改
+                //，接下来几个函数都有相关操作
             }
         }
         return ret;
     }
 
+    /**
+     * @param task
+     * @param index
+     * @return
+     * 功能：在当前任务表的指定位置添加新的任务。
+     */
     public boolean addChildTask(Task task, int index) {
         if (index < 0 || index > mChildren.size()) {
             Log.e(TAG, "add child task: invalid index");
@@ -260,6 +289,11 @@ public class TaskList extends Node {
         return true;
     }
 
+    /**
+     * @param task
+     * @return 返回删除是否成功
+     * 功能：删除TaskList中的一个Task
+     */
     public boolean removeChildTask(Task task) {
         boolean ret = false;
         int index = mChildren.indexOf(task);
@@ -281,6 +315,12 @@ public class TaskList extends Node {
         return ret;
     }
 
+    /**
+     * @param task
+     * @param index
+     * @return
+     * 功能：将当前TaskList中含有的某个Task移到index位置
+     */
     public boolean moveChildTask(Task task, int index) {
 
         if (index < 0 || index >= mChildren.size()) {
@@ -297,8 +337,14 @@ public class TaskList extends Node {
         if (pos == index)
             return true;
         return (removeChildTask(task) && addChildTask(task, index));
+        //利用已实现好的功能完成当下功能；
     }
 
+    /**
+     * @param gid
+     * @return返回寻找结果
+     * 功能：按gid寻找Task
+     */
     public Task findChildTaskByGid(String gid) {
         for (int i = 0; i < mChildren.size(); i++) {
             Task t = mChildren.get(i);
@@ -309,10 +355,20 @@ public class TaskList extends Node {
         return null;
     }
 
+    /**
+     * @param task
+     * @return
+     * 功能：返回指定Task的index
+     */
     public int getChildTaskIndex(Task task) {
         return mChildren.indexOf(task);
     }
 
+    /**
+     * @param index
+     * @return
+     * 功能：返回指定index的Task
+     */
     public Task getChildTaskByIndex(int index) {
         if (index < 0 || index >= mChildren.size()) {
             Log.e(TAG, "getTaskByIndex: invalid index");
@@ -321,8 +377,13 @@ public class TaskList extends Node {
         return mChildren.get(index);
     }
 
+    /**
+     * @param gid
+     * @return
+     * 功能：返回指定gid的Task
+     */
     public Task getChilTaskByGid(String gid) {
-        for (Task task : mChildren) {
+        for (Task task : mChildren) {//一种常见的ArrayList的遍历方法（四种，见精读笔记）
             if (task.getGid().equals(gid))
                 return task;
         }
diff --git a/src/net/micode/notes/gtask/exception/ActionFailureException.java b/src/net/micode/notes/gtask/exception/ActionFailureException.java
index 15504be..83821dc 100644
--- a/src/net/micode/notes/gtask/exception/ActionFailureException.java
+++ b/src/net/micode/notes/gtask/exception/ActionFailureException.java
@@ -12,17 +12,30 @@
  * 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.
+ * 
+ * Description：支持小米便签运行过程中的运行异常处理。
  */
 
 package net.micode.notes.gtask.exception;
 
 public class ActionFailureException extends RuntimeException {
     private static final long serialVersionUID = 4425249765923293627L;
-
+    /*
+     * 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。
+     * Made By Cuican
+     */
+    
     public ActionFailureException() {
         super();
     }
-
+    /*
+     * 在JAVA类中使用super来引用父类的成分，用this来引用当前对象.
+     * 如果一个类从另外一个类继承，我们new这个子类的实例对象的时候，这个子类对象里面会有一个父类对象。
+     * 怎么去引用里面的父类对象呢？使用super来引用
+     * 也就是说，此处super()以及super (paramString)可认为是Exception ()和Exception (paramString)
+     * Made By Cuican
+     */
     public ActionFailureException(String paramString) {
         super(paramString);
     }
diff --git a/src/net/micode/notes/gtask/exception/NetworkFailureException.java b/src/net/micode/notes/gtask/exception/NetworkFailureException.java
index b08cfb1..ded9de9 100644
--- a/src/net/micode/notes/gtask/exception/NetworkFailureException.java
+++ b/src/net/micode/notes/gtask/exception/NetworkFailureException.java
@@ -12,17 +12,31 @@
  * 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.
+ * 
+ * Description：支持小米便签运行过程中的网络异常处理。
  */
 
 package net.micode.notes.gtask.exception;
 
 public class NetworkFailureException extends Exception {
     private static final long serialVersionUID = 2107610287180234136L;
+    /*
+     * 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。
+     * Made By Cuican
+     */
 
     public NetworkFailureException() {
         super();
     }
 
+    /*
+     * 在JAVA类中使用super来引用父类的成分，用this来引用当前对象.
+     * 如果一个类从另外一个类继承，我们new这个子类的实例对象的时候，这个子类对象里面会有一个父类对象。
+     * 怎么去引用里面的父类对象呢？使用super来引用
+     * 也就是说，此处super()以及super (paramString)可认为是Exception ()和Exception (paramString)
+     * Made By Cuican
+     */
     public NetworkFailureException(String paramString) {
         super(paramString);
     }
diff --git a/src/net/micode/notes/gtask/remote/GTaskASyncTask.java b/src/net/micode/notes/gtask/remote/GTaskASyncTask.java
index b3b61e7..6475568 100644
--- a/src/net/micode/notes/gtask/remote/GTaskASyncTask.java
+++ b/src/net/micode/notes/gtask/remote/GTaskASyncTask.java
@@ -28,9 +28,16 @@ import net.micode.notes.R;
 import net.micode.notes.ui.NotesListActivity;
 import net.micode.notes.ui.NotesPreferenceActivity;
 
-
+/*异步操作类，实现GTask的异步操作过程
+ * 主要方法：
+ * private void showNotification(int tickerId, String content) 向用户提示当前同步的状态，是一个用于交互的方法
+ * protected Integer doInBackground(Void... unused) 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
+ * protected void onProgressUpdate(String... progress)  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。
+ * protected void onPostExecute(Integer result)  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
+ */
 public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
 
+
     private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;
 
     public interface OnCompleteListener {
@@ -57,7 +64,7 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
         mTaskManager.cancelSync();
     }
 
-    public void publishProgess(String message) {
+    public void publishProgess(String message) { // 发布进度单位，系统将会调用onProgressUpdate()方法更新这些值
         publishProgress(new String[] {
             message
         });
@@ -66,43 +73,43 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
     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;
+        notification.defaults = Notification.DEFAULT_LIGHTS; // 调用系统自带灯光
+        notification.flags = Notification.FLAG_AUTO_CANCEL;  // 点击清除按钮或点击通知后会自动消失
+        PendingIntent pendingIntent;  //一个描述了想要启动一个Activity、Broadcast或是Service的意图
         if (tickerId != R.string.ticker_success) {
             pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
-                    NotesPreferenceActivity.class), 0);
+                    NotesPreferenceActivity.class), 0);  //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
 
         } else {
             pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
-                    NotesListActivity.class), 0);
+                    NotesListActivity.class), 0); //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
         }
         notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
                 pendingIntent);
-        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);//通过NotificationManager对象的notify（）方法来执行一个notification的消息
     }
 
     @Override
     protected Integer doInBackground(Void... unused) {
         publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity
-                .getSyncAccountName(mContext)));
-        return mTaskManager.sync(mContext, this);
+                .getSyncAccountName(mContext)));  //利用getString,将把 NotesPreferenceActivity.getSyncAccountName(mContext))的字符串内容传进sync_progress_login中
+        return mTaskManager.sync(mContext, this);    //进行后台同步具体操作
     }
 
     @Override
     protected void onProgressUpdate(String... progress) {
         showNotification(R.string.ticker_syncing, progress[0]);
-        if (mContext instanceof GTaskSyncService) {
+        if (mContext instanceof GTaskSyncService) {  //instanceof 判断mContext是否是GTaskSyncService的实例
             ((GTaskSyncService) mContext).sendBroadcast(progress[0]);
         }
     }
 
     @Override
-    protected void onPostExecute(Integer result) {
+    protected void onPostExecute(Integer result) {  //用于在执行完后台任务后更新UI,显示结果 
         if (result == GTaskManager.STATE_SUCCESS) {
             showNotification(R.string.ticker_success, mContext.getString(
                     R.string.success_sync_account, mTaskManager.getSyncAccount()));
-            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
+            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());  //设置最新同步的时间
         } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
             showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network));
         } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
@@ -110,12 +117,12 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
         } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
             showNotification(R.string.ticker_cancel, mContext
                     .getString(R.string.error_sync_cancelled));
-        }
+        } //几种不同情况下的结果显示
         if (mOnCompleteListener != null) {
-            new Thread(new Runnable() {
+            new Thread(new Runnable() {  //这里好像是方法内的一个线程，但是并不太懂什么意思
 
-                public void run() {
-                    mOnCompleteListener.onComplete();
+                public void run() {   //完成后的操作，使用onComplete()将所有值都重新初始化，相当于完成一次操作
+                    mOnCompleteListener.onComplete();    
                 }
             }).start();
         }
diff --git a/src/net/micode/notes/gtask/remote/GTaskClient.java b/src/net/micode/notes/gtask/remote/GTaskClient.java
index c67dfdf..b4f6ce0 100644
--- a/src/net/micode/notes/gtask/remote/GTaskClient.java
+++ b/src/net/micode/notes/gtask/remote/GTaskClient.java
@@ -49,6 +49,7 @@ import org.apache.http.params.HttpProtocolParams;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
+import org.junit.Before;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -61,10 +62,14 @@ import java.util.zip.Inflater;
 import java.util.zip.InflaterInputStream;
 
 
+/*
+ * 主要功能：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
+ * 主要使用类或技术：accountManager JSONObject HttpParams authToken Gid
+ */ 
 public class GTaskClient {
     private static final String TAG = GTaskClient.class.getSimpleName();
 
-    private static final String GTASK_URL = "https://mail.google.com/tasks/";
+    private static final String GTASK_URL = "https://mail.google.com/tasks/"; //这个是指定的URL
 
     private static final String GTASK_GET_URL = "https://mail.google.com/tasks/ig";
 
@@ -89,7 +94,7 @@ public class GTaskClient {
     private Account mAccount;
 
     private JSONArray mUpdateArray;
-
+    
     private GTaskClient() {
         mHttpClient = null;
         mGetUrl = GTASK_GET_URL;
@@ -101,50 +106,62 @@ public class GTaskClient {
         mAccount = null;
         mUpdateArray = null;
     }
-
+    
+    /*用来获取的实例化对象
+     * 使用 getInstance()
+     * 返回mInstance这个实例化对象
+     */
     public static synchronized GTaskClient getInstance() {
         if (mInstance == null) {
             mInstance = new GTaskClient();
         }
         return mInstance;
     }
-
+    
+    /*用来实现登录操作的函数，传入的参数是一个Activity
+     * 设置登录操作限制时间，如果超时则需要重新登录
+     * 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
+     * 返回true或者false，即最后是否登陆成功
+     */
     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
+        // need to re-login after account switch  重新登录操作
         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，改为系统当前的时间
+        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()
+        //尝试使用用户自己的域名登录
+        if (!(mAccount.name.toLowerCase().endsWith("gmail.com") || mAccount.name.toLowerCase() //将用户账号名改为统一格式（小写）后判断是否为一个谷歌账号地址
                 .endsWith("googlemail.com"))) {
             StringBuilder url = new StringBuilder(GTASK_URL).append("a/");
             int index = mAccount.name.indexOf('@') + 1;
             String suffix = mAccount.name.substring(index);
             url.append(suffix + "/");
-            mGetUrl = url.toString() + "ig";
-            mPostUrl = url.toString() + "r/ig";
+            mGetUrl = url.toString() + "ig";  //设置用户对应的getUrl
+            mPostUrl = url.toString() + "r/ig";  //设置用户对应的postUrl
 
             if (tryToLoginGtask(activity, authToken)) {
                 mLoggedin = true;
@@ -152,8 +169,9 @@ public class GTaskClient {
         }
 
         // 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;
+            mGetUrl = GTASK_GET_URL; 
             mPostUrl = GTASK_POST_URL;
             if (!tryToLoginGtask(activity, authToken)) {
                 return false;
@@ -163,11 +181,16 @@ public class GTaskClient {
         mLoggedin = true;
         return true;
     }
-
+    
+    /*具体实现登录谷歌账户的方法
+     * 使用令牌机制
+     * 使用AccountManager来管理注册账号
+     * 返回值是账号的令牌
+     */
     private String loginGoogleAccount(Activity activity, boolean invalidateToken) {
-        String authToken;
-        AccountManager accountManager = AccountManager.get(activity);
-        Account[] accounts = accountManager.getAccountsByType("com.google");
+        String authToken;  //令牌，是登录操作保证安全性的一个方法
+        AccountManager accountManager = AccountManager.get(activity);//AccountManager这个类给用户提供了集中注册账号的接口
+        Account[] accounts = accountManager.getAccountsByType("com.google");//获取全部以com.google结尾的account
 
         if (accounts.length == 0) {
             Log.e(TAG, "there is no available google account");
@@ -176,6 +199,7 @@ 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;
@@ -190,11 +214,13 @@ public class GTaskClient {
         }
 
         // get the token now
+        //获取选中账号的令牌
         AccountManagerFuture<Bundle> accountManagerFuture = accountManager.getAuthToken(account,
                 "goanna_mobile", null, activity, null, null);
         try {
             Bundle authTokenBundle = accountManagerFuture.getResult();
             authToken = authTokenBundle.getString(AccountManager.KEY_AUTHTOKEN);
+            //如果是invalidateToken，那么需要调用invalidateAuthToken(String, String)方法废除这个无效token
             if (invalidateToken) {
                 accountManager.invalidateAuthToken("com.google", authToken);
                 loginGoogleAccount(activity, false);
@@ -206,11 +232,13 @@ public class GTaskClient {
 
         return authToken;
     }
-
+    
+    //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
     private boolean tryToLoginGtask(Activity activity, String authToken) {
-        if (!loginGtask(authToken)) {
-            // maybe the auth token is out of date, now let's invalidate the
+        if (!loginGtask(authToken)) {  
+            // maybe the auth token is out of authTokedate, now let's invalidate the
             // token and try again
+        	//删除过一个无效的authToken，申请一个新的后再次尝试登陆
             authToken = loginGoogleAccount(activity, true);
             if (authToken == null) {
                 Log.e(TAG, "login google account failed");
@@ -224,26 +252,28 @@ public class GTaskClient {
         }
         return true;
     }
-
+    
+    //实现登录GTask的具体操作
     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();
+        BasicCookieStore localBasicCookieStore = new BasicCookieStore(); //设置本地cookie
         mHttpClient.setCookieStore(localBasicCookieStore);
         HttpProtocolParams.setUseExpectContinue(mHttpClient.getParams(), false);
 
         // login gtask
         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,看如果存有“GTL(不知道什么意思)”，则说明有验证成功的有效的cookie
             List<Cookie> cookies = mHttpClient.getCookieStore().getCookies();
             boolean hasAuthCookie = false;
             for (Cookie cookie : cookies) {
@@ -256,6 +286,7 @@ public class GTaskClient {
             }
 
             // get the client version
+            //获取client的内容，具体操作是在返回的Content中截取从_setup(开始到)}</script>中间的字符串内容，也就是gtask_url的内容
             String resString = getResponseContent(response.getEntity());
             String jsBegin = "_setup(";
             String jsEnd = ")}</script>";
@@ -283,32 +314,40 @@ public class GTaskClient {
     private int getActionId() {
         return mActionId++;
     }
-
+    
+    /*实例化创建一个用于向网络传输数据的对象
+     * 使用HttpPost类
+     * 返回一个httpPost实例化对象，但里面还没有内容
+     */
     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;
     }
-
+    
+    /*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
+     * 使用getContentEncoding()获取网络上的资源和数据
+     * 返回值就是获取到的资源
+     */
     private String getResponseContent(HttpEntity entity) throws IOException {
         String contentEncoding = null;
-        if (entity.getContentEncoding() != null) {
+        if (entity.getContentEncoding() != null) {//通过URL得到HttpEntity对象，如果不为空则使用getContent（）方法创建一个流将数据从网络都过来
             contentEncoding = entity.getContentEncoding().getValue();
             Log.d(TAG, "encoding: " + contentEncoding);
         }
 
         InputStream input = entity.getContent();
-        if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {
+        if (contentEncoding != null && contentEncoding.equalsIgnoreCase("gzip")) {//GZIP是使用DEFLATE进行压缩数据的另一个压缩库
             input = new GZIPInputStream(entity.getContent());
-        } else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {
+        } else if (contentEncoding != null && contentEncoding.equalsIgnoreCase("deflate")) {//DEFLATE是一个无专利的压缩算法，它可以实现无损数据压缩
             Inflater inflater = new Inflater(true);
             input = new InflaterInputStream(entity.getContent(), inflater);
         }
 
         try {
             InputStreamReader isr = new InputStreamReader(input);
-            BufferedReader br = new BufferedReader(isr);
+            BufferedReader br = new BufferedReader(isr);//是一个包装类，它可以包装字符流，将字符流放入缓存里，先把字符读到缓存里，到缓存满了时候，再读入内存，是为了提供读的效率而设计的
             StringBuilder sb = new StringBuilder();
 
             while (true) {
@@ -322,21 +361,29 @@ public class GTaskClient {
             input.close();
         }
     }
-
+    
+  /*通过JSON发送请求
+   * 请求的具体内容在json的实例化对象js中然后传入
+   * 利用UrlEncodedFormEntity entity和httpPost.setEntity(entity)方法把js中的内容放置到httpPost中
+   * 执行请求后使用getResponseContent方法得到返回的数据和资源
+   * 将资源再次放入json后返回
+   */
     private JSONObject postRequest(JSONObject js) throws NetworkFailureException {
-        if (!mLoggedin) {
+        if (!mLoggedin) {//未登录
             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>();
             list.add(new BasicNameValuePair("r", js.toString()));
-            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
+            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8"); //UrlEncodedFormEntity()的形式比较单一，是普通的键值对
             httpPost.setEntity(entity);
 
             // execute the post
+            //执行这个请求
             HttpResponse response = mHttpClient.execute(httpPost);
             String jsString = getResponseContent(response.getEntity());
             return new JSONObject(jsString);
@@ -359,7 +406,13 @@ public class GTaskClient {
             throw new ActionFailureException("error occurs when posting request");
         }
     }
-
+    
+    /*创建单个任务
+     * 传入参数是一个.gtask.data.Task包里Task类的对象
+     * 利用json获取Task里的内容,并且创建相应的jsPost
+     * 利用postRequest得到任务的返回信息
+     * 使用task.setGid设置task的new_ID
+     */
     public void createTask(Task task) throws NetworkFailureException {
         commitUpdate();
         try {
@@ -385,7 +438,10 @@ public class GTaskClient {
             throw new ActionFailureException("create task: handing jsonobject failed");
         }
     }
-
+    
+    /*
+     * 创建一个任务列表，与createTask几乎一样，区别就是最后设置的是tasklist的gid
+     */
     public void createTaskList(TaskList tasklist) throws NetworkFailureException {
         commitUpdate();
         try {
@@ -411,7 +467,12 @@ public class GTaskClient {
             throw new ActionFailureException("create tasklist: handing jsonobject failed");
         }
     }
-
+    
+    /*
+     * 同步更新操作
+     * 使用JSONObject进行数据存储，使用jsPost.put，Put的信息包括UpdateArray和ClientVersion
+     * 使用postRequest发送这个jspost,进行处理
+     */
     public void commitUpdate() throws NetworkFailureException {
         if (mUpdateArray != null) {
             try {
@@ -432,7 +493,11 @@ public class GTaskClient {
             }
         }
     }
-
+    
+    /*
+     * 添加更新的事项
+     * 调用commitUpdate()实现
+     */
     public void addUpdateNode(Node node) throws NetworkFailureException {
         if (node != null) {
             // too many update items may result in an error
@@ -446,7 +511,13 @@ public class GTaskClient {
             mUpdateArray.put(node.getUpdateAction(getActionId()));
         }
     }
-
+    
+    /*
+     * 移动task,比如讲task移动到不同的task列表中去
+     * 通过getGid获取task所属列表的gid
+     * 通过JSONObject.put(String name, Object value)函数设置移动后的task的相关属性值，从而达到移动的目的
+     * 最后还是通过postRequest进行更新后的发送
+     */
     public void moveTask(Task task, TaskList preParent, TaskList curParent)
             throws NetworkFailureException {
         commitUpdate();
@@ -463,15 +534,17 @@ public class GTaskClient {
             if (preParent == curParent && task.getPriorSibling() != null) {
                 // put prioring_sibing_id only if moving within the tasklist and
                 // it is not the first one
+            	//设置优先级ID，只有当移动是发生在文件中
                 action.put(GTaskStringUtils.GTASK_JSON_PRIOR_SIBLING_ID, task.getPriorSibling());
             }
-            action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());
-            action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());
+            action.put(GTaskStringUtils.GTASK_JSON_SOURCE_LIST, preParent.getGid());  //设置移动前所属列表
+            action.put(GTaskStringUtils.GTASK_JSON_DEST_PARENT, curParent.getGid());  //设置当前所属列表
             if (preParent != curParent) {
                 // put the dest_list only if moving between tasklists
                 action.put(GTaskStringUtils.GTASK_JSON_DEST_LIST, curParent.getGid());
             }
             actionList.put(action);
+            //最后将ACTION_LIST加入到jsPost中
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
 
             // client_version
@@ -485,7 +558,12 @@ public class GTaskClient {
             throw new ActionFailureException("move task: handing jsonobject failed");
         }
     }
-
+    
+    /*
+     * 删除操作节点
+     * 还是利用JSON
+     * 删除过后使用postRequest发送删除后的结果
+     */
     public void deleteNode(Node node) throws NetworkFailureException {
         commitUpdate();
         try {
@@ -494,7 +572,7 @@ public class GTaskClient {
 
             // action_list
             node.setDeleted(true);
-            actionList.put(node.getUpdateAction(getActionId()));
+            actionList.put(node.getUpdateAction(getActionId()));  //这里会获取到删除操作的ID，加入到actionLiast中
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
 
             // client_version
@@ -508,7 +586,12 @@ public class GTaskClient {
             throw new ActionFailureException("delete node: handing jsonobject failed");
         }
     }
-
+    
+    /*
+     * 获取任务列表
+     * 首先通过GetURI使用getResponseContent从网上获取数据
+     * 然后筛选出"_setup("到)}</script>的部分，并且从中获取GTASK_JSON_LISTS的内容返回
+     */
     public JSONArray getTaskLists() throws NetworkFailureException {
         if (!mLoggedin) {
             Log.e(TAG, "please login first");
@@ -521,6 +604,7 @@ public class GTaskClient {
             response = mHttpClient.execute(httpGet);
 
             // get the task list
+            //筛选工作，把筛选出的字符串放入jsString
             String resString = getResponseContent(response.getEntity());
             String jsBegin = "_setup(";
             String jsEnd = ")}</script>";
@@ -531,6 +615,7 @@ public class GTaskClient {
                 jsString = resString.substring(begin + jsBegin.length(), end);
             }
             JSONObject js = new JSONObject(jsString);
+            //获取GTASK_JSON_LISTS
             return js.getJSONObject("t").getJSONArray(GTaskStringUtils.GTASK_JSON_LISTS);
         } catch (ClientProtocolException e) {
             Log.e(TAG, e.toString());
@@ -546,7 +631,10 @@ public class GTaskClient {
             throw new ActionFailureException("get task lists: handing jasonobject failed");
         }
     }
-
+    
+    /*
+     * 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
+     */
     public JSONArray getTaskList(String listGid) throws NetworkFailureException {
         commitUpdate();
         try {
@@ -557,8 +645,8 @@ public class GTaskClient {
             // action_list
             action.put(GTaskStringUtils.GTASK_JSON_ACTION_TYPE,
                     GTaskStringUtils.GTASK_JSON_ACTION_TYPE_GETALL);
-            action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());
-            action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);
+            action.put(GTaskStringUtils.GTASK_JSON_ACTION_ID, getActionId());  
+            action.put(GTaskStringUtils.GTASK_JSON_LIST_ID, listGid);    //这里设置为传入的listGid
             action.put(GTaskStringUtils.GTASK_JSON_GET_DELETED, false);
             actionList.put(action);
             jsPost.put(GTaskStringUtils.GTASK_JSON_ACTION_LIST, actionList);
@@ -578,7 +666,8 @@ public class GTaskClient {
     public Account getSyncAccount() {
         return mAccount;
     }
-
+    
+    //重置更新的内容
     public void resetUpdateArray() {
         mUpdateArray = null;
     }
diff --git a/src/net/micode/notes/gtask/remote/GTaskManager.java b/src/net/micode/notes/gtask/remote/GTaskManager.java
index d2b4082..77b3e70 100644
--- a/src/net/micode/notes/gtask/remote/GTaskManager.java
+++ b/src/net/micode/notes/gtask/remote/GTaskManager.java
@@ -59,7 +59,7 @@ public class GTaskManager {
 
     public static final int STATE_SYNC_IN_PROGRESS = 3;
 
-    public static final int STATE_SYNC_CANCELLED = 4;
+    public static final int STATE_SYNC_CANCELLED = 4; 
 
     private static GTaskManager mInstance = null;
 
@@ -81,39 +81,58 @@ public class GTaskManager {
 
     private TaskList mMetaList;
 
-    private HashSet<Long> mLocalDeleteIdMap;
+    private HashSet<Long> mLocalDeleteIdMap;   
 
     private HashMap<String, Long> mGidToNid;
 
     private HashMap<Long, String> mNidToGid;
 
-    private GTaskManager() {
-        mSyncing = false;
-        mCancelled = false;
-        mGTaskListHashMap = new HashMap<String, TaskList>();
+    private GTaskManager() {                                   //对象初始化函数
+        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>();   //<>代表Java的泛型,就是创建一个用类型作为参数的类。
         mGTaskHashMap = new HashMap<String, Node>();
         mMetaHashMap = new HashMap<String, MetaData>();
         mMetaList = null;
         mLocalDeleteIdMap = new HashSet<Long>();
-        mGidToNid = new HashMap<String, Long>();
-        mNidToGid = new HashMap<Long, String>();
+        mGidToNid = new HashMap<String, Long>();    //GoogleID to NodeID??
+        mNidToGid = new HashMap<Long, String>();    //NodeID to GoogleID???通过hashmap散列表建立映射
     }
 
-    public static synchronized GTaskManager getInstance() {
+    /**
+     * 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。
+     * 功能：类初始化函数
+     * @author TTS
+     * @return GtaskManger
+     */
+    public static synchronized GTaskManager getInstance() {    //可能运行在多线程环境下，使用语言级同步--synchronized
         if (mInstance == null) {
             mInstance = new GTaskManager();
         }
         return mInstance;
     }
 
+    /**
+     * 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。
+     * @author TTS
+     * @param activity
+     */
     public synchronized void setActivityContext(Activity activity) {
-        // used for getting authtoken
+        // used for getting auth token
         mActivity = activity;
     }
 
-    public int sync(Context context, GTaskASyncTask asyncTask) {
+    /**
+     * 核心函数
+     * 功能：实现了本地同步操作和远端同步操作
+     * @author TTS
+     * @param context-----获取上下文
+     * @param asyncTask-------用于同步的异步操作类
+     * @return int
+     */
+    public int sync(Context context, GTaskASyncTask asyncTask) {           //核心函数
         if (mSyncing) {
-            Log.d(TAG, "Sync is in progress");
+            Log.d(TAG, "Sync is in progress");                       //创建日志文件（调试信息），debug
             return STATE_SYNC_IN_PROGRESS;
         }
         mContext = context;
@@ -128,8 +147,8 @@ public class GTaskManager {
         mNidToGid.clear();
 
         try {
-            GTaskClient client = GTaskClient.getInstance();
-            client.resetUpdateArray();
+            GTaskClient client = GTaskClient.getInstance();    //getInstance即为创建一个实例,client--客户机
+            client.resetUpdateArray();     //JSONArray类型，reset即置为NULL
 
             // login google task
             if (!mCancelled) {
@@ -140,15 +159,15 @@ public class GTaskManager {
 
             // get the task list from google
             asyncTask.publishProgess(mContext.getString(R.string.sync_progress_init_list));
-            initGTaskList();
+            initGTaskList();                                 //获取Google上的JSONtasklist转为本地TaskList
 
             // do content sync work
             asyncTask.publishProgess(mContext.getString(R.string.sync_progress_syncing));
             syncContent();
-        } catch (NetworkFailureException e) {
-            Log.e(TAG, e.toString());
+        } catch (NetworkFailureException e) {                       //分为两种异常，此类异常为网络异常
+            Log.e(TAG, e.toString());                             //创建日志文件（调试信息），error
             return STATE_NETWORK_ERROR;
-        } catch (ActionFailureException e) {
+        } catch (ActionFailureException e) {                        //此类异常为操作异常
             Log.e(TAG, e.toString());
             return STATE_INTERNAL_ERROR;
         } catch (Exception e) {
@@ -168,32 +187,41 @@ public class GTaskManager {
         return mCancelled ? STATE_SYNC_CANCELLED : STATE_SUCCESS;
     }
 
+    /**
+     *功能：初始化GtaskList，获取Google上的JSONtasklist转为本地TaskList。
+     *获得的数据存储在mMetaList，mGTaskListHashMap，mGTaskHashMap
+     *@author TTS
+     *@exception NetworkFailureException
+     *@return void
+     */
     private void initGTaskList() throws NetworkFailureException {
         if (mCancelled)
             return;
-        GTaskClient client = GTaskClient.getInstance();
+        GTaskClient client = GTaskClient.getInstance();    //getInstance即为创建一个实例，client应指远端客户机
         try {
-            JSONArray jsTaskLists = client.getTaskLists();
+        	//Json对象是Name Value对(即子元素)的无序集合，相当于一个Map对象。JsonObject类是bantouyan-json库对Json对象的抽象，提供操纵Json对象的各种方法。
+        	//其格式为{"key1":value1,"key2",value2....};key 必须是字符串。
+        	//因为ajax请求不刷新页面，但配合js可以实现局部刷新，因此json常常被用来作为异步请求的返回对象使用。
+            JSONArray jsTaskLists = client.getTaskLists();     //原注释为get task list------lists？？？
 
             // init meta list first
-            mMetaList = null;
+            mMetaList = null;                                       //TaskList类型
             for (int i = 0; i < jsTaskLists.length(); i++) {
-                JSONObject object = jsTaskLists.getJSONObject(i);
+                JSONObject object = jsTaskLists.getJSONObject(i);  //JSONObject与JSONArray一个为对象，一个为数组。此处取出单个JASONObject
                 String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
                 String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
 
-                if (name
-                        .equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
-                    mMetaList = new TaskList();
-                    mMetaList.setContentByRemoteJSON(object);
+                if (name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX + GTaskStringUtils.FOLDER_META)) {
+                    mMetaList = new TaskList();                    //MetaList意为元表,Tasklist类型，此处为初始化
+                    mMetaList.setContentByRemoteJSON(object);      //将JSON中部分数据复制到自己定义的对象中相对应的数据：name->mname...
 
                     // load meta data
-                    JSONArray jsMetas = client.getTaskList(gid);
+                    JSONArray jsMetas = client.getTaskList(gid);   //原注释为get action_list------list？？？
                     for (int j = 0; j < jsMetas.length(); j++) {
                         object = (JSONObject) jsMetas.getJSONObject(j);
-                        MetaData metaData = new MetaData();
+                        MetaData metaData = new MetaData();            //继承自Node
                         metaData.setContentByRemoteJSON(object);
-                        if (metaData.isWorthSaving()) {
+                        if (metaData.isWorthSaving()) {                             //if not worth to save，metadata将不加入mMetaList
                             mMetaList.addChildTask(metaData);
                             if (metaData.getGid() != null) {
                                 mMetaHashMap.put(metaData.getRelatedGid(), metaData);
@@ -214,16 +242,16 @@ public class GTaskManager {
             // init task list
             for (int i = 0; i < jsTaskLists.length(); i++) {
                 JSONObject object = jsTaskLists.getJSONObject(i);
-                String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);
+                String gid = object.getString(GTaskStringUtils.GTASK_JSON_ID);  //通过getString函数传入本地某个标志数据的名称，获取其在远端的名称。
                 String name = object.getString(GTaskStringUtils.GTASK_JSON_NAME);
 
                 if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX)
                         && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX
                                 + GTaskStringUtils.FOLDER_META)) {
-                    TaskList tasklist = new TaskList();
+                    TaskList tasklist = new TaskList();     //继承自Node
                     tasklist.setContentByRemoteJSON(object);
-                    mGTaskListHashMap.put(gid, tasklist);
-                    mGTaskHashMap.put(gid, tasklist);
+                    mGTaskListHashMap.put(gid, tasklist);       
+                    mGTaskHashMap.put(gid, tasklist);          //为什么加两遍？？？
 
                     // load tasks
                     JSONArray jsTasks = client.getTaskList(gid);
@@ -247,13 +275,18 @@ public class GTaskManager {
         }
     }
 
-    private void syncContent() throws NetworkFailureException {
+    /**
+     * 功能：本地内容同步操作
+     * @throws NetworkFailureException
+     * @return 无返回值
+     */
+    private void syncContent() throws NetworkFailureException {    //本地内容同步操作
         int syncType;
-        Cursor c = null;
-        String gid;
-        Node node;
+        Cursor c = null;                                           //数据库指针
+        String gid;                                                //GoogleID??
+        Node node;                                                 //Node包含Sync_Action的不同类型
 
-        mLocalDeleteIdMap.clear();
+        mLocalDeleteIdMap.clear();                                 //HashSet<Long>类型
 
         if (mCancelled) {
             return;
@@ -301,8 +334,8 @@ public class GTaskManager {
                     node = mGTaskHashMap.get(gid);
                     if (node != null) {
                         mGTaskHashMap.remove(gid);
-                        mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));
-                        mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);
+                        mGidToNid.put(gid, c.getLong(SqlNote.ID_COLUMN));   //通过hashmap建立联系
+                        mNidToGid.put(c.getLong(SqlNote.ID_COLUMN), gid);   //通过hashmap建立联系
                         syncType = node.getSyncAction(c);
                     } else {
                         if (c.getString(SqlNote.GTASK_ID_COLUMN).trim().length() == 0) {
@@ -327,14 +360,14 @@ public class GTaskManager {
         }
 
         // go through remaining items
-        Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator();
+        Iterator<Map.Entry<String, Node>> iter = mGTaskHashMap.entrySet().iterator();   //Iterator迭代器
         while (iter.hasNext()) {
             Map.Entry<String, Node> entry = iter.next();
             node = entry.getValue();
             doContentSync(Node.SYNC_ACTION_ADD_LOCAL, node, null);
         }
 
-        // mCancelled can be set by another thread, so we neet to check one by
+        // mCancelled can be set by another thread, so we neet to check one by    //thread----线程
         // one
         // clear local delete table
         if (!mCancelled) {
@@ -351,6 +384,11 @@ public class GTaskManager {
 
     }
 
+    /**
+     * 功能：
+     * @author TTS
+     * @throws NetworkFailureException
+     */
     private void syncFolder() throws NetworkFailureException {
         Cursor c = null;
         String gid;
@@ -476,6 +514,14 @@ public class GTaskManager {
             GTaskClient.getInstance().commitUpdate();
     }
 
+    /**
+     * 功能：syncType分类，addLocalNode，addRemoteNode，deleteNode，updateLocalNode，updateRemoteNode
+     * @author TTS
+     * @param syncType
+     * @param node
+     * @param c
+     * @throws NetworkFailureException
+     */
     private void doContentSync(int syncType, Node node, Cursor c) throws NetworkFailureException {
         if (mCancelled) {
             return;
@@ -522,6 +568,12 @@ public class GTaskManager {
         }
     }
 
+    /**
+     * 功能：本地增加Node
+     * @author TTS
+     * @param node
+     * @throws NetworkFailureException
+     */
     private void addLocalNode(Node node) throws NetworkFailureException {
         if (mCancelled) {
             return;
@@ -596,6 +648,15 @@ public class GTaskManager {
         updateRemoteMeta(node.getGid(), sqlNote);
     }
 
+    /**
+     * 功能：update本地node
+     * @author TTS
+     * @param node
+     * ----同步操作的基础数据类型
+     * @param c
+     * ----Cursor
+     * @throws NetworkFailureException
+     */
     private void updateLocalNode(Node node, Cursor c) throws NetworkFailureException {
         if (mCancelled) {
             return;
@@ -619,12 +680,22 @@ public class GTaskManager {
         updateRemoteMeta(node.getGid(), sqlNote);
     }
 
+    /**
+     * 功能：远程增加Node
+     * 需要updateRemoteMeta
+     * @author TTS
+     * @param node
+     * ----同步操作的基础数据类型
+     * @param c
+     * --Cursor
+     * @throws NetworkFailureException
+     */
     private void addRemoteNode(Node node, Cursor c) throws NetworkFailureException {
         if (mCancelled) {
             return;
         }
 
-        SqlNote sqlNote = new SqlNote(mContext, c);
+        SqlNote sqlNote = new SqlNote(mContext, c);     //从本地mContext中获取内容
         Node n;
 
         // update remotely
@@ -634,12 +705,13 @@ public class GTaskManager {
 
             String parentGid = mNidToGid.get(sqlNote.getParentId());
             if (parentGid == null) {
-                Log.e(TAG, "cannot find task's parent tasklist");
+                Log.e(TAG, "cannot find task's parent tasklist");           //调试信息
                 throw new ActionFailureException("cannot add remote task");
             }
-            mGTaskListHashMap.get(parentGid).addChildTask(task);
+            mGTaskListHashMap.get(parentGid).addChildTask(task);            //在本地生成的GTaskList中增加子结点
 
-            GTaskClient.getInstance().createTask(task);
+            //登录远程服务器，创建Task
+            GTaskClient.getInstance().createTask(task); 
             n = (Node) task;
 
             // add meta
@@ -656,7 +728,8 @@ public class GTaskManager {
             else
                 folderName += sqlNote.getSnippet();
 
-            Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator();
+            //iterator迭代器，通过统一的接口迭代所有的map元素
+            Iterator<Map.Entry<String, TaskList>> iter = mGTaskListHashMap.entrySet().iterator(); 
             while (iter.hasNext()) {
                 Map.Entry<String, TaskList> entry = iter.next();
                 String gid = entry.getKey();
@@ -687,11 +760,20 @@ public class GTaskManager {
         sqlNote.resetLocalModified();
         sqlNote.commit(true);
 
-        // gid-id mapping
+        // gid-id mapping                                             //创建id间的映射
         mGidToNid.put(n.getGid(), sqlNote.getId());
         mNidToGid.put(sqlNote.getId(), n.getGid());
     }
 
+    /**
+     * 功能：更新远端的Node，包含meta更新(updateRemoteMeta)
+     * @author TTS
+     * @param node
+     * ----同步操作的基础数据类型
+     * @param c
+     *  --Cursor
+     * @throws NetworkFailureException
+     */
     private void updateRemoteNode(Node node, Cursor c) throws NetworkFailureException {
         if (mCancelled) {
             return;
@@ -701,7 +783,7 @@ public class GTaskManager {
 
         // update remotely
         node.setContentByLocalJSON(sqlNote.getContent());
-        GTaskClient.getInstance().addUpdateNode(node);
+        GTaskClient.getInstance().addUpdateNode(node);                                //GTaskClient用途为从本地登陆远端服务器 
 
         // update meta
         updateRemoteMeta(node.getGid(), sqlNote);
@@ -709,16 +791,20 @@ public class GTaskManager {
         // move task if necessary
         if (sqlNote.isNoteType()) {
             Task task = (Task) node;
-            TaskList preParentList = task.getParent();
-
+            TaskList preParentList = task.getParent(); 
+            //preParentList为通过node获取的父节点列表
+            
             String curParentGid = mNidToGid.get(sqlNote.getParentId());
+            //curParentGid为通过光标在数据库中找到sqlNote的mParentId，再通过mNidToGid由long类型转为String类型的Gid
+            
             if (curParentGid == null) {
                 Log.e(TAG, "cannot find task's parent tasklist");
                 throw new ActionFailureException("cannot update remote task");
             }
             TaskList curParentList = mGTaskListHashMap.get(curParentGid);
+            //通过HashMap找到对应Gid的TaskList
 
-            if (preParentList != curParentList) {
+            if (preParentList != curParentList) {                                          //?????????????
                 preParentList.removeChildTask(task);
                 curParentList.addChildTask(task);
                 GTaskClient.getInstance().moveTask(task, preParentList, curParentList);
@@ -727,9 +813,19 @@ public class GTaskManager {
 
         // clear local modified flag
         sqlNote.resetLocalModified();
-        sqlNote.commit(true);
+        //commit到本地数据库
+        sqlNote.commit(true); 
     }
 
+    /**
+     * 功能：升级远程meta。  meta---元数据----计算机文件系统管理数据---管理数据的数据。
+     * @author TTS
+     * @param gid
+     * ---GoogleID为String类型
+     * @param sqlNote
+     * ---同步前的数据库操作，故使用类SqlNote
+     * @throws NetworkFailureException
+     */
     private void updateRemoteMeta(String gid, SqlNote sqlNote) throws NetworkFailureException {
         if (sqlNote != null && sqlNote.isNoteType()) {
             MetaData metaData = mMetaHashMap.get(gid);
@@ -746,12 +842,18 @@ public class GTaskManager {
         }
     }
 
+    /**
+     * 功能：刷新本地，给sync的ID对应上最后更改过的对象
+     * @author TTS
+     * @return void
+     * @throws NetworkFailureException
+     */
     private void refreshLocalSyncId() throws NetworkFailureException {
         if (mCancelled) {
             return;
         }
 
-        // get the latest gtask list
+        // get the latest gtask list                                               //获取最近的（最晚的）gtask list
         mGTaskHashMap.clear();
         mGTaskListHashMap.clear();
         mMetaHashMap.clear();
@@ -762,16 +864,16 @@ public class GTaskManager {
             c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE,
                     "(type<>? AND parent_id<>?)", new String[] {
                             String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)
-                    }, NoteColumns.TYPE + " DESC");
+                    }, NoteColumns.TYPE + " DESC");                                                 //query语句：五个参数，NoteColumns.TYPE + " DESC"-----为按类型递减顺序返回查询结果。new String[] {String.valueOf(Notes.TYPE_SYSTEM), String.valueOf(Notes.ID_TRASH_FOLER)}------为选择参数。"(type<>? AND parent_id<>?)"-------指明返回行过滤器。SqlNote.PROJECTION_NOTE--------应返回的数据列的名字。Notes.CONTENT_NOTE_URI--------contentProvider包含所有数据集所对应的uri
             if (c != null) {
                 while (c.moveToNext()) {
                     String gid = c.getString(SqlNote.GTASK_ID_COLUMN);
                     Node node = mGTaskHashMap.get(gid);
                     if (node != null) {
                         mGTaskHashMap.remove(gid);
-                        ContentValues values = new ContentValues();
+                        ContentValues values = new ContentValues();                     //在ContentValues中创建键值对。准备通过contentResolver写入数据
                         values.put(NoteColumns.SYNC_ID, node.getLastModified());
-                        mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,
+                        mContentResolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI,   //进行批量更改，选择参数为NULL，应该可以用insert替换，参数分别为表名和需要更新的value对象。
                                 c.getLong(SqlNote.ID_COLUMN)), values, null, null);
                     } else {
                         Log.e(TAG, "something is missed");
@@ -790,10 +892,19 @@ public class GTaskManager {
         }
     }
 
+    /**
+     * 功能：获取同步账号,mAccount.name
+     * @author TTS
+     * @return String
+     */
     public String getSyncAccount() {
         return GTaskClient.getInstance().getSyncAccount().name;
     }
 
+    /**
+     * 功能：取消同步，置mCancelled为true
+     * @author TTS
+     */
     public void cancelSync() {
         mCancelled = true;
     }
diff --git a/src/net/micode/notes/gtask/remote/GTaskSyncService.java b/src/net/micode/notes/gtask/remote/GTaskSyncService.java
index cca36f7..111d17e 100644
--- a/src/net/micode/notes/gtask/remote/GTaskSyncService.java
+++ b/src/net/micode/notes/gtask/remote/GTaskSyncService.java
@@ -23,6 +23,22 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.os.IBinder;
 
+/*
+ * Service是在一段不定的时间运行在后台，不和用户交互的应用组件
+ * 主要方法：
+ * private void startSync()  启动一个同步工作
+ * private void cancelSync() 取消同步
+ * public void onCreate()
+ * public int onStartCommand(Intent intent, int flags, int startId)  service生命周期的组成部分，相当于重启service（比如在被暂停之后），而不是创建一个新的service
+ * public void onLowMemory()  在没有内存的情况下如果存在service则结束掉这的service
+ * public IBinder onBind()
+ * public void sendBroadcast(String msg)   发送同步的相关通知
+ * public static void startSync(Activity activity)
+ * public static void cancelSync(Context context) 
+ * public static boolean isSyncing()  判读是否在进行同步
+ * public static String getProgressString()  获取当前进度的信息
+ */
+
 public class GTaskSyncService extends Service {
     public final static String ACTION_STRING_NAME = "sync_action_type";
 
@@ -41,21 +57,23 @@ public class GTaskSyncService extends Service {
     private static GTaskASyncTask mSyncTask = null;
 
     private static String mSyncProgress = "";
-
+    
+    //开始一个同步的工作
     private void startSync() {
         if (mSyncTask == null) {
             mSyncTask = new GTaskASyncTask(this, new GTaskASyncTask.OnCompleteListener() {
                 public void onComplete() {
                     mSyncTask = null;
                     sendBroadcast("");
-                    stopSelf();
+                    stopSelf();  
                 }
             });
             sendBroadcast("");
-            mSyncTask.execute();
+            mSyncTask.execute(); //这个函数让任务是以单线程队列方式或线程池队列方式运行
         }
     }
-
+    
+    
     private void cancelSync() {
         if (mSyncTask != null) {
             mSyncTask.cancelSync();
@@ -63,7 +81,7 @@ public class GTaskSyncService extends Service {
     }
 
     @Override
-    public void onCreate() {
+    public void onCreate() {  //初始化一个service
         mSyncTask = null;
     }
 
@@ -72,6 +90,7 @@ public class GTaskSyncService extends Service {
         Bundle bundle = intent.getExtras();
         if (bundle != null && bundle.containsKey(ACTION_STRING_NAME)) {
             switch (bundle.getInt(ACTION_STRING_NAME, ACTION_INVALID)) {
+            //两种情况，开始同步或者取消同步
                 case ACTION_START_SYNC:
                     startSync();
                     break;
@@ -81,7 +100,7 @@ public class GTaskSyncService extends Service {
                 default:
                     break;
             }
-            return START_STICKY;
+            return START_STICKY; //等待新的intent来是这个service继续运行
         }
         return super.onStartCommand(intent, flags, startId);
     }
@@ -93,26 +112,26 @@ public class GTaskSyncService extends Service {
         }
     }
 
-    public IBinder onBind(Intent intent) {
+    public IBinder onBind(Intent intent) {  //不知道干吗用的
         return null;
     }
 
     public void sendBroadcast(String msg) {
         mSyncProgress = msg;
-        Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME);
-        intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null);
+        Intent intent = new Intent(GTASK_SERVICE_BROADCAST_NAME);  //创建一个新的Intent
+        intent.putExtra(GTASK_SERVICE_BROADCAST_IS_SYNCING, mSyncTask != null); //附加INTENT中的相应参数的值
         intent.putExtra(GTASK_SERVICE_BROADCAST_PROGRESS_MSG, msg);
-        sendBroadcast(intent);
+        sendBroadcast(intent);   //发送这个通知
     }
 
-    public static void startSync(Activity activity) {
+    public static void startSync(Activity activity) {//执行一个service，service的内容里的同步动作就是开始同步
         GTaskManager.getInstance().setActivityContext(activity);
         Intent intent = new Intent(activity, GTaskSyncService.class);
         intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_START_SYNC);
         activity.startService(intent);
     }
 
-    public static void cancelSync(Context context) {
+    public static void cancelSync(Context context) {//执行一个service，service的内容里的同步动作就是取消同步
         Intent intent = new Intent(context, GTaskSyncService.class);
         intent.putExtra(GTaskSyncService.ACTION_STRING_NAME, GTaskSyncService.ACTION_CANCEL_SYNC);
         context.startService(intent);
diff --git a/src/net/micode/notes/model/Note.java b/src/net/micode/notes/model/Note.java
index 6706cf6..a7a4c2f 100644
--- a/src/net/micode/notes/model/Note.java
+++ b/src/net/micode/notes/model/Note.java
@@ -13,17 +13,19 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+//
 package net.micode.notes.model;
-import android.content.ContentProviderOperation;
-import android.content.ContentProviderResult;
-import android.content.ContentUris;
-import android.content.ContentValues;
-import android.content.Context;
-import android.content.OperationApplicationException;
-import android.net.Uri;
-import android.os.RemoteException;
-import android.util.Log;
+
+//by zzc
+import android.content.ContentProviderOperation;//批量的更新、插入、删除数据。
+import android.content.ContentProviderResult;//操作的结果
+import android.content.ContentUris;//用于添加和获取Uri后面的ID
+import android.content.ContentValues;//一种用来存储基本数据类型数据的存储机制
+import android.content.Context;//需要用该类来弄清楚调用者的实例
+import android.content.OperationApplicationException;//操作应用程序容错
+import android.net.Uri;//表示待操作的数据
+import android.os.RemoteException;//远程容错
+import android.util.Log;//输出日志，比如说出错、警告等
 
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.CallNote;
@@ -33,11 +35,12 @@ import net.micode.notes.data.Notes.TextNote;
 
 import java.util.ArrayList;
 
-
 public class Note {
-    private ContentValues mNoteDiffValues;
+ //   private ContentValues mNoteDiffValues;
+    ContentValues mNoteDiffValues;//
     private NoteData mNoteData;
     private static final String TAG = "Note";
+    
     /**
      * Create a new note id for adding a new note to databases
      */
@@ -49,16 +52,17 @@ public class Note {
         values.put(NoteColumns.MODIFIED_DATE, createdTime);
         values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
         values.put(NoteColumns.LOCAL_MODIFIED, 1);
-        values.put(NoteColumns.PARENT_ID, folderId);
+        values.put(NoteColumns.PARENT_ID, folderId);//将数据写入数据库表格
         Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
-
+        //ContentResolver()主要是实现外部应用对ContentProvider中的数据
+        //进行添加、删除、修改和查询操作
         long noteId = 0;
         try {
             noteId = Long.valueOf(uri.getPathSegments().get(1));
         } catch (NumberFormatException e) {
             Log.e(TAG, "Get note id error :" + e.toString());
             noteId = 0;
-        }
+        }//try-catch异常处理
         if (noteId == -1) {
             throw new IllegalStateException("Wrong note id:" + noteId);
         }
@@ -68,37 +72,37 @@ public class Note {
     public Note() {
         mNoteDiffValues = new ContentValues();
         mNoteData = new NoteData();
-    }
+    }//定义两个变量用来存储便签的数据，一个是存储便签属性、一个是存储便签内容
 
     public void setNoteValue(String key, String value) {
         mNoteDiffValues.put(key, value);
         mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
         mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
-    }
+    }//设置数据库表格的标签属性数据
 
     public void setTextData(String key, String value) {
         mNoteData.setTextData(key, value);
-    }
+    }//设置数据库表格的标签文本内容的数据
 
     public void setTextDataId(long id) {
         mNoteData.setTextDataId(id);
-    }
+    }//设置文本数据的ID
 
     public long getTextDataId() {
         return mNoteData.mTextDataId;
-    }
+    }//得到文本数据的ID
 
     public void setCallDataId(long id) {
         mNoteData.setCallDataId(id);
-    }
+    }//设置电话号码数据的ID
 
     public void setCallData(String key, String value) {
         mNoteData.setCallData(key, value);
-    }
+    }//得到电话号码数据的ID
 
     public boolean isLocalModified() {
         return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
-    }
+    }//判断是否是本地修改
 
     public boolean syncNote(Context context, long noteId) {
         if (noteId <= 0) {
@@ -128,16 +132,16 @@ public class Note {
         }
 
         return true;
-    }
+    }//判断数据是否同步
 
-    private class NoteData {
+    private class NoteData {//定义一个基本的便签内容的数据类，主要包含文本数据和电话号码数据
         private long mTextDataId;
 
-        private ContentValues mTextDataValues;
+        private ContentValues mTextDataValues;//文本数据
 
         private long mCallDataId;
 
-        private ContentValues mCallDataValues;
+        private ContentValues mCallDataValues;//电话号码数据
 
         private static final String TAG = "NoteData";
 
@@ -147,7 +151,7 @@ public class Note {
             mTextDataId = 0;
             mCallDataId = 0;
         }
-
+        //下面是上述几个函数的具体实现
         boolean isLocalModified() {
             return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
         }
@@ -177,17 +181,17 @@ public class Note {
             mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
             mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
         }
-
+        //下面函数的作用是将新的数据通过Uri的操作存储到数据库
         Uri pushIntoContentResolver(Context context, long noteId) {
             /**
              * Check for safety
              */
             if (noteId <= 0) {
                 throw new IllegalArgumentException("Wrong note id:" + noteId);
-            }
+            }//判断数据是否合法
 
             ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
-            ContentProviderOperation.Builder builder = null;
+            ContentProviderOperation.Builder builder = null;//数据库的操作列表
 
             if(mTextDataValues.size() > 0) {
                 mTextDataValues.put(DataColumns.NOTE_ID, noteId);
@@ -209,7 +213,7 @@ public class Note {
                     operationList.add(builder.build());
                 }
                 mTextDataValues.clear();
-            }
+            }//把文本数据存入DataColumns
 
             if(mCallDataValues.size() > 0) {
                 mCallDataValues.put(DataColumns.NOTE_ID, noteId);
@@ -231,7 +235,7 @@ public class Note {
                     operationList.add(builder.build());
                 }
                 mCallDataValues.clear();
-            }
+            }//把电话号码数据存入DataColumns
 
             if (operationList.size() > 0) {
                 try {
@@ -246,7 +250,7 @@ public class Note {
                     Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
                     return null;
                 }
-            }
+            }//存储过程中的异常处理
             return null;
         }
     }
diff --git a/src/net/micode/notes/model/WorkingNote.java b/src/net/micode/notes/model/WorkingNote.java
index be081e4..0886c78 100644
--- a/src/net/micode/notes/model/WorkingNote.java
+++ b/src/net/micode/notes/model/WorkingNote.java
@@ -61,7 +61,8 @@ public class WorkingNote {
     private boolean mIsDeleted;
 
     private NoteSettingChangedListener mNoteSettingStatusListener;
-
+    
+    // 声明 DATA_PROJECTION字符串数组
     public static final String[] DATA_PROJECTION = new String[] {
             DataColumns.ID,
             DataColumns.CONTENT,
@@ -71,7 +72,8 @@ public class WorkingNote {
             DataColumns.DATA3,
             DataColumns.DATA4,
     };
-
+    
+ // 声明 NOTE_PROJECTION字符串数组
     public static final String[] NOTE_PROJECTION = new String[] {
             NoteColumns.PARENT_ID,
             NoteColumns.ALERTED_DATE,
@@ -102,7 +104,7 @@ public class WorkingNote {
     private static final int NOTE_MODIFIED_DATE_COLUMN = 5;
 
     // New note construct
-    private WorkingNote(Context context, long folderId) {
+    public WorkingNote(Context context, long folderId) {
         mContext = context;
         mAlertDate = 0;
         mModifiedDate = System.currentTimeMillis();
@@ -113,7 +115,8 @@ public class WorkingNote {
         mMode = 0;
         mWidgetType = Notes.TYPE_WIDGET_INVALIDE;
     }
-
+    
+    // WorkingNote的构造函数
     // Existing note construct
     private WorkingNote(Context context, long noteId, long folderId) {
         mContext = context;
@@ -123,12 +126,15 @@ public class WorkingNote {
         mNote = new Note();
         loadNote();
     }
-
+    
+    // 加载Note
+    // 通过数据库调用query函数找到第一个条目
     private void loadNote() {
         Cursor cursor = mContext.getContentResolver().query(
                 ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
                 null, null);
-
+        
+        // 若存在，储存相应信息
         if (cursor != null) {
             if (cursor.moveToFirst()) {
                 mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
@@ -139,6 +145,7 @@ public class WorkingNote {
                 mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);
             }
             cursor.close();
+        // 若不存在，报错
         } else {
             Log.e(TAG, "No note with id:" + mNoteId);
             throw new IllegalArgumentException("Unable to find note with id " + mNoteId);
@@ -146,6 +153,7 @@ public class WorkingNote {
         loadNoteData();
     }
 
+    // 加载NoteData
     private void loadNoteData() {
         Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
                 DataColumns.NOTE_ID + "=?", new String[] {
@@ -153,7 +161,8 @@ public class WorkingNote {
                 }, null);
 
         if (cursor != null) {
-            if (cursor.moveToFirst()) {
+        	// 查到信息不为空
+            if (cursor.moveToFirst()) { // 查看第一项是否存在 
                 do {
                     String type = cursor.getString(DATA_MIME_TYPE_COLUMN);
                     if (DataConstants.NOTE.equals(type)) {
@@ -165,7 +174,7 @@ public class WorkingNote {
                     } else {
                         Log.d(TAG, "Wrong note type with type:" + type);
                     }
-                } while (cursor.moveToNext());
+                } while (cursor.moveToNext());//查阅所有项,直到为空
             }
             cursor.close();
         } else {
@@ -174,9 +183,12 @@ public class WorkingNote {
         }
     }
 
+    // 创建空的Note
+    // 传参：context，文件夹id，widget，背景颜色
     public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
             int widgetType, int defaultBgColorId) {
         WorkingNote note = new WorkingNote(context, folderId);
+        // 设定相关属性
         note.setBgColorId(defaultBgColorId);
         note.setWidgetId(widgetId);
         note.setWidgetType(widgetType);
@@ -187,9 +199,10 @@ public class WorkingNote {
         return new WorkingNote(context, id, 0);
     }
 
+    // 保存Note
     public synchronized boolean saveNote() {
-        if (isWorthSaving()) {
-            if (!existInDatabase()) {
+        if (isWorthSaving()) { //是否值得保存
+            if (!existInDatabase()) { // 是否存在数据库中
                 if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
                     Log.e(TAG, "Create new note fail with id:" + mNoteId);
                     return false;
@@ -212,11 +225,14 @@ public class WorkingNote {
         }
     }
 
+    // 是否在数据库中存在
     public boolean existInDatabase() {
         return mNoteId > 0;
     }
 
+    // 是否值得保存
     private boolean isWorthSaving() {
+    	// 被删除，或（不在数据库中 内容为空），或 本地已保存过
         if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
                 || (existInDatabase() && !mNote.isLocalModified())) {
             return false;
@@ -225,10 +241,14 @@ public class WorkingNote {
         }
     }
 
+    
+    // 设置mNoteSettingStatusListener
     public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
         mNoteSettingStatusListener = l;
     }
 
+    // 设置AlertDate
+    // 若 mAlertDate与data不同，则更改mAlertDate并设定NoteValue
     public void setAlertDate(long date, boolean set) {
         if (date != mAlertDate) {
             mAlertDate = date;
@@ -238,17 +258,21 @@ public class WorkingNote {
             mNoteSettingStatusListener.onClockAlertChanged(date, set);
         }
     }
-
+    
+    // 设定删除标记
     public void markDeleted(boolean mark) {
+    	// 设定标记
         mIsDeleted = mark;
         if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
                 && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {
                 mNoteSettingStatusListener.onWidgetChanged();
+                // 调用mNoteSettingStatusListener的 onWidgetChanged方法
         }
     }
 
+ // 设定背景颜色
     public void setBgColorId(int id) {
-        if (id != mBgColorId) {
+        if (id != mBgColorId) { //设定条件 id != mBgColorId
             mBgColorId = id;
             if (mNoteSettingStatusListener != null) {
                 mNoteSettingStatusListener.onBackgroundColorChanged();
@@ -257,8 +281,10 @@ public class WorkingNote {
         }
     }
 
+    // 设定检查列表模式
+    // 参数：mode
     public void setCheckListMode(int mode) {
-        if (mMode != mode) {
+        if (mMode != mode) { //设定条件 mMode != mode
             if (mNoteSettingStatusListener != null) {
                 mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);
             }
@@ -266,83 +292,110 @@ public class WorkingNote {
             mNote.setTextData(TextNote.MODE, String.valueOf(mMode));
         }
     }
+    
 
+    // 设定WidgetType
+    // 参数：type
     public void setWidgetType(int type) {
-        if (type != mWidgetType) {
+        if (type != mWidgetType) {//设定条件 type != mWidgetType
             mWidgetType = type;
             mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
+            // 调用Note的setNoteValue方法更改WidgetType
         }
     }
-
+    
+    // 设定WidgetId
+    // 参数：id
     public void setWidgetId(int id) {
-        if (id != mWidgetId) {
+        if (id != mWidgetId) {//设定条件 id != mWidgetId
             mWidgetId = id;
             mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
+         // 调用Note的setNoteValue方法更改WidgetId
         }
     }
 
+    // 设定WorkingTex
+    // 参数：更改的text
     public void setWorkingText(String text) {
-        if (!TextUtils.equals(mContent, text)) {
+        if (!TextUtils.equals(mContent, text)) {//设定条件 mContent, text内容不同
             mContent = text;
             mNote.setTextData(DataColumns.CONTENT, mContent);
+         // 调用Note的setTextData方法更改WorkingText
         }
     }
 
+    // 转变mNote的CallData及CallNote信息
+    // 参数：String phoneNumber, long callDate
     public void convertToCallNote(String phoneNumber, long callDate) {
         mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
         mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
         mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
     }
 
+    // 判断是否有时钟题型
     public boolean hasClockAlert() {
         return (mAlertDate > 0 ? true : false);
     }
 
+    // 获取Content
     public String getContent() {
         return mContent;
     }
 
+    // 获取AlertDate
     public long getAlertDate() {
         return mAlertDate;
     }
 
+    // 获取ModifiedDate
     public long getModifiedDate() {
         return mModifiedDate;
     }
 
+    // 获取背景颜色来源id
     public int getBgColorResId() {
         return NoteBgResources.getNoteBgResource(mBgColorId);
     }
 
+    // 获取背景颜色id
     public int getBgColorId() {
         return mBgColorId;
     }
 
+    // 获取标题背景颜色id
     public int getTitleBgResId() {
         return NoteBgResources.getNoteTitleBgResource(mBgColorId);
     }
 
+    // 获取CheckListMode
     public int getCheckListMode() {
         return mMode;
     }
 
+    // 获取便签id
     public long getNoteId() {
         return mNoteId;
     }
 
+    // 获取文件夹id
     public long getFolderId() {
         return mFolderId;
     }
 
+    // 获取WidgetId
     public int getWidgetId() {
         return mWidgetId;
     }
 
+    // 获取WidgetType
     public int getWidgetType() {
         return mWidgetType;
     }
 
-    public interface NoteSettingChangedListener {
+    // 创建接口 NoteSettingChangedListener,便签更新监视
+    // 为NoteEditActivity提供接口
+    // 提供函数有
+    public interface NoteSettingChangedListener {  
         /**
          * Called when the background color of current note has just changed
          */
diff --git a/src/net/micode/notes/tool/BackupUtils.java b/src/net/micode/notes/tool/BackupUtils.java
index 39f6ec4..fa457fa 100644
--- a/src/net/micode/notes/tool/BackupUtils.java
+++ b/src/net/micode/notes/tool/BackupUtils.java
@@ -12,10 +12,10 @@
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
- */
+ */       
 
 package net.micode.notes.tool;
-
+ 
 import android.content.Context;
 import android.database.Cursor;
 import android.os.Environment;
@@ -37,12 +37,16 @@ import java.io.PrintStream;
 
 
 public class BackupUtils {
-    private static final String TAG = "BackupUtils";
+    private static final String TAG = "BackupUtils";    
     // Singleton stuff
-    private static BackupUtils sInstance;
+    private static BackupUtils sInstance;   //类里面为什么可以定义自身类的对象？
 
     public static synchronized BackupUtils getInstance(Context context) {
+    //ynchronized 关键字，代表这个方法加锁,相当于不管哪一个线程（例如线程A）
+    //运行到这个方法时,都要检查有没有其它线程B（或者C、 D等）正在用这个方法(或者该类的其他同步方法)，有的话要等正在使用synchronized方法的线程B（或者C 、D）运行完这个方法后再运行此线程A,没有的话,锁定调用者,然后直接运行。
+    //它包括两种用法：synchronized 方法和 synchronized 块。
         if (sInstance == null) {
+        	//如果当前备份不存在，则新声明一个
             sInstance = new BackupUtils(context);
         }
         return sInstance;
@@ -52,24 +56,24 @@ public class BackupUtils {
      * Following states are signs to represents backup or restore
      * status
      */
-    // Currently, the sdcard is not mounted
-    public static final int STATE_SD_CARD_UNMOUONTED           = 0;
-    // The backup file not exist
+    // Currently, the sdcard is not mounted SD卡没有被装入手机
+    public static final int STATE_SD_CARD_UNMOUONTED           = 0;  
+    // The backup file not exist  备份文件夹不存在
     public static final int STATE_BACKUP_FILE_NOT_EXIST        = 1;
-    // The data is not well formated, may be changed by other programs
+    // The data is not well formated, may be changed by other programs  数据已被破坏，可能被修改
     public static final int STATE_DATA_DESTROIED               = 2;
-    // Some run-time exception which causes restore or backup fails
+    // Some run-time exception which causes restore or backup fails  超时异常
     public static final int STATE_SYSTEM_ERROR                 = 3;
-    // Backup or restore success
+    // Backup or restore success  成功存储
     public static final int STATE_SUCCESS                      = 4;
 
     private TextExport mTextExport;
 
-    private BackupUtils(Context context) {
+    private BackupUtils(Context context) {  //初始化函数
         mTextExport = new TextExport(context);
     }
 
-    private static boolean externalStorageAvailable() {
+    private static boolean externalStorageAvailable() {   //外部存储功能是否可用
         return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
     }
 
@@ -128,34 +132,34 @@ public class BackupUtils {
         public TextExport(Context context) {
             TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note);
             mContext = context;
-            mFileName = "";
+            mFileName = "";    //为什么为空?
             mFileDirectory = "";
         }
 
-        private String getFormat(int id) {
+        private String getFormat(int id) {  //获取文本的组成部分
             return TEXT_FORMAT[id];
         }
 
         /**
          * Export the folder identified by folder id to text
          */
-        private void exportFolderToText(String folderId, PrintStream ps) {
-            // Query notes belong to this folder
+        private void exportFolderToText(String folderId, PrintStream ps) {   
+            // Query notes belong to this folder  通过查询parent id是文件夹id的note来选出制定ID文件夹下的Note
             Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] {
                         folderId
                     }, null);
 
-            if (notesCursor != null) {
+            if (notesCursor != null) {                             
                 if (notesCursor.moveToFirst()) {
                     do {
-                        // Print note's last modified date
+                        // Print note's last modified date   ps里面保存有这份note的日期
                         ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format(
                                 mContext.getString(R.string.format_datetime_mdhm),
                                 notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE))));
                         // Query data belong to this note
                         String noteId = notesCursor.getString(NOTE_COLUMN_ID);
-                        exportNoteToText(noteId, ps);
+                        exportNoteToText(noteId, ps);  //将文件导出到text
                     } while (notesCursor.moveToNext());
                 }
                 notesCursor.close();
@@ -165,13 +169,13 @@ public class BackupUtils {
         /**
          * Export note identified by id to a print stream
          */
-        private void exportNoteToText(String noteId, PrintStream ps) {
+        private void exportNoteToText(String noteId, PrintStream ps) {  
             Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
                     DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
                         noteId
                     }, null);
 
-            if (dataCursor != null) {
+            if (dataCursor != null) { //利用光标来扫描内容，区别为callnote和note两种，靠ps.printline输出
                 if (dataCursor.moveToFirst()) {
                     do {
                         String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE);
@@ -181,7 +185,7 @@ public class BackupUtils {
                             long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
                             String location = dataCursor.getString(DATA_COLUMN_CONTENT);
 
-                            if (!TextUtils.isEmpty(phoneNumber)) {
+                            if (!TextUtils.isEmpty(phoneNumber)) {  //判断是否为空字符
                                 ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT),
                                         phoneNumber));
                             }
@@ -218,7 +222,7 @@ public class BackupUtils {
         /**
          * Note will be exported as text which is user readable
          */
-        public int exportToText() {
+        public int exportToText() {    //总函数，调用上面的exportFolder和exportNote
             if (!externalStorageAvailable()) {
                 Log.d(TAG, "Media was not mounted");
                 return STATE_SD_CARD_UNMOUONTED;
@@ -229,7 +233,7 @@ public class BackupUtils {
                 Log.e(TAG, "get print stream error");
                 return STATE_SYSTEM_ERROR;
             }
-            // First export folder and its notes
+            // First export folder and its notes                                 导出文件夹，就是导出里面包含的便签
             Cursor folderCursor = mContext.getContentResolver().query(
                     Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION,
@@ -257,7 +261,7 @@ public class BackupUtils {
                 folderCursor.close();
             }
 
-            // Export notes in root's folder
+            // Export notes in root's folder                     将根目录里的便签导出（由于不属于任何文件夹，因此无法通过文件夹导出来实现这一部分便签的导出）
             Cursor noteCursor = mContext.getContentResolver().query(
                     Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION,
@@ -285,7 +289,7 @@ public class BackupUtils {
         /**
          * Get a print stream pointed to the file {@generateExportedTextFile}
          */
-        private PrintStream getExportToTextPrintStream() {
+        private PrintStream getExportToTextPrintStream() {                  
             File file = generateFileMountedOnSDcard(mContext, R.string.file_path,
                     R.string.file_name_txt_format);
             if (file == null) {
@@ -297,7 +301,7 @@ public class BackupUtils {
             PrintStream ps = null;
             try {
                 FileOutputStream fos = new FileOutputStream(file);
-                ps = new PrintStream(fos);
+                ps = new PrintStream(fos);                           //将ps输出流输出到特定的文件，目的就是导出到文件，而不是直接输出
             } catch (FileNotFoundException e) {
                 e.printStackTrace();
                 return null;
@@ -314,16 +318,16 @@ public class BackupUtils {
      */
     private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
         StringBuilder sb = new StringBuilder();
-        sb.append(Environment.getExternalStorageDirectory());
-        sb.append(context.getString(filePathResId));
-        File filedir = new File(sb.toString());
+        sb.append(Environment.getExternalStorageDirectory());  //外部（SD卡）的存储路径
+        sb.append(context.getString(filePathResId));    //文件的存储路径
+        File filedir = new File(sb.toString());        //filedir应该就是用来存储路径信息
         sb.append(context.getString(
                 fileNameFormatResId,
                 DateFormat.format(context.getString(R.string.format_date_ymd),
                         System.currentTimeMillis())));
         File file = new File(sb.toString());
 
-        try {
+        try {   //如果这些文件不存在，则新建
             if (!filedir.exists()) {
                 filedir.mkdir();
             }
@@ -336,9 +340,8 @@ public class BackupUtils {
         } catch (IOException e) {
             e.printStackTrace();
         }
-
+// try catch 异常处理
         return null;
     }
 }
 
-
diff --git a/src/net/micode/notes/tool/DataUtils.java b/src/net/micode/notes/tool/DataUtils.java
index 2a14982..7ebfb08 100644
--- a/src/net/micode/notes/tool/DataUtils.java
+++ b/src/net/micode/notes/tool/DataUtils.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+      
 package net.micode.notes.tool;
 
 import android.content.ContentProviderOperation;
@@ -37,7 +37,7 @@ import java.util.HashSet;
 
 public class DataUtils {
     public static final String TAG = "DataUtils";
-    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
+    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {   //直接删除多个笔记
         if (ids == null) {
             Log.d(TAG, "the ids is null");
             return true;
@@ -47,18 +47,19 @@ public class DataUtils {
             return true;
         }
 
-        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
+        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();  //提供一个任务列表
         for (long id : ids) {
             if(id == Notes.ID_ROOT_FOLDER) {
                 Log.e(TAG, "Don't delete system folder root");
                 continue;
-            }
+            }  //如果发现是根文件夹，则不删除
             ContentProviderOperation.Builder builder = ContentProviderOperation
-                    .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
-            operationList.add(builder.build());
+                    .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));  //用newDelete实现删除功能
+            operationList.add(builder.build());   //
         }
         try {
-            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);//主机名（或叫Authority）用于唯一标识这个ContentProvider，外部调用者可以根据这个标识来找到它。
+            //数据库事务，数据库事务是由一组数据库操作序列组成，事务作为一个整体被执行
             if (results == null || results.length == 0 || results[0] == null) {
                 Log.d(TAG, "delete notes failed, ids:" + ids.toString());
                 return false;
@@ -77,7 +78,7 @@ public class DataUtils {
         values.put(NoteColumns.PARENT_ID, desFolderId);
         values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);
         values.put(NoteColumns.LOCAL_MODIFIED, 1);
-        resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
+        resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);  //对需要移动的便签进行数据更新，然后用update实现
     }
 
     public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
@@ -90,14 +91,14 @@ public class DataUtils {
         ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
         for (long id : ids) {
             ContentProviderOperation.Builder builder = ContentProviderOperation
-                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));  //通过withAppendedId方法，为该Uri加上ID
             builder.withValue(NoteColumns.PARENT_ID, folderId);
             builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
             operationList.add(builder.build());
-        }
+        }//将ids里包含的每一列的数据逐次加入到operationList中，等待最后的批量处理
 
         try {
-            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
+            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);  //applyBatch一次性处理一个操作列表
             if (results == null || results.length == 0 || results[0] == null) {
                 Log.d(TAG, "delete notes failed, ids:" + ids.toString());
                 return false;
@@ -119,13 +120,13 @@ public class DataUtils {
                 new String[] { "COUNT(*)" },
                 NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
                 new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
-                null);
+                null);  //筛选条件：源文件不为trash folder
 
         int count = 0;
         if(cursor != null) {
             if(cursor.moveToFirst()) {
                 try {
-                    count = cursor.getInt(0);
+                    count = cursor.getInt(0);  
                 } catch (IndexOutOfBoundsException e) {
                     Log.e(TAG, "get folder count failed:" + e.toString());
                 } finally {
@@ -134,18 +135,18 @@ public class DataUtils {
             }
         }
         return count;
-    }
+    } 
 
     public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
-        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
+        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), //通过withAppendedId方法，为该Uri加上ID
                 null,
                 NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
-                new String [] {String.valueOf(type)},
-                null);
+                new String [] {String.valueOf(type)},   
+                null); //查询条件：type符合，且不属于垃圾文件夹
 
         boolean exist = false;
         if (cursor != null) {
-            if (cursor.getCount() > 0) {
+            if (cursor.getCount() > 0) {//用getcount函数判断cursor是否为空
                 exist = true;
             }
             cursor.close();
@@ -187,6 +188,7 @@ public class DataUtils {
                 " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
                 " AND " + NoteColumns.SNIPPET + "=?",
                 new String[] { name }, null);
+        //通过名字查询文件是否存在
         boolean exist = false;
         if(cursor != null) {
             if(cursor.getCount() > 0) {
@@ -202,8 +204,8 @@ public class DataUtils {
                 new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
                 NoteColumns.PARENT_ID + "=?",
                 new String[] { String.valueOf(folderId) },
-                null);
-
+                null); //查询条件：父ID是传入的folderId;
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
         HashSet<AppWidgetAttribute> set = null;
         if (c != null) {
             if (c.moveToFirst()) {
@@ -211,13 +213,13 @@ public class DataUtils {
                 do {
                     try {
                         AppWidgetAttribute widget = new AppWidgetAttribute();
-                        widget.widgetId = c.getInt(0);
-                        widget.widgetType = c.getInt(1);
+                        widget.widgetId = c.getInt(0);  //0对应的NoteColumns.WIDGET_ID
+                        widget.widgetType = c.getInt(1);  //1对应的NoteColumns.WIDGET_TYPE
                         set.add(widget);
                     } catch (IndexOutOfBoundsException e) {
                         Log.e(TAG, e.toString());
                     }
-                } while (c.moveToNext());
+                } while (c.moveToNext()); //查询下一条
             }
             c.close();
         }
@@ -250,11 +252,12 @@ public class DataUtils {
                 + CallNote.PHONE_NUMBER + ",?)",
                 new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
                 null);
+        //通过数据库操作，查询条件是（callDate和phoneNumber匹配传入参数的值）
 
         if (cursor != null) {
             if (cursor.moveToFirst()) {
                 try {
-                    return cursor.getLong(0);
+                    return cursor.getLong(0); //0对应的CallNote.NOTE_ID
                 } catch (IndexOutOfBoundsException e) {
                     Log.e(TAG, "Get call note id fails " + e.toString());
                 }
@@ -269,7 +272,7 @@ public class DataUtils {
                 new String [] { NoteColumns.SNIPPET },
                 NoteColumns.ID + "=?",
                 new String [] { String.valueOf(noteId)},
-                null);
+                null);//查询条件：noteId
 
         if (cursor != null) {
             String snippet = "";
@@ -281,8 +284,7 @@ public class DataUtils {
         }
         throw new IllegalArgumentException("Note is not found with id: " + noteId);
     }
-
-    public static String getFormattedSnippet(String snippet) {
+    public static String getFormattedSnippet(String snippet) {  //对字符串进行格式处理，将字符串两头的空格去掉，同时将换行符去掉
         if (snippet != null) {
             snippet = snippet.trim();
             int index = snippet.indexOf('\n');
@@ -292,4 +294,5 @@ public class DataUtils {
         }
         return snippet;
     }
+    
 }
diff --git a/src/net/micode/notes/tool/GTaskStringUtils.java b/src/net/micode/notes/tool/GTaskStringUtils.java
index 666b729..6658da4 100644
--- a/src/net/micode/notes/tool/GTaskStringUtils.java
+++ b/src/net/micode/notes/tool/GTaskStringUtils.java
@@ -14,9 +14,12 @@
  * limitations under the License.
  */
 
+
+//简介：定义了很多的静态字符串，目的就是为了提供jsonObject中相应字符串的"key"。把这些静态的定义单独写到了一个类里面，这是非常好的编程规范
 package net.micode.notes.tool;
 
-public class GTaskStringUtils {
+//这个类就是定义了一堆static string，实际就是为jsonObject提供Key，把这些定义全部写到一个类里，方便查看管理，是一个非常好的编程习惯
+public class GTaskStringUtils { 
 
     public final static String GTASK_JSON_ACTION_ID = "action_id";
 
diff --git a/src/net/micode/notes/tool/ResourceParser.java b/src/net/micode/notes/tool/ResourceParser.java
index 1ad3ad6..fd58bd8 100644
--- a/src/net/micode/notes/tool/ResourceParser.java
+++ b/src/net/micode/notes/tool/ResourceParser.java
@@ -22,6 +22,22 @@ import android.preference.PreferenceManager;
 import net.micode.notes.R;
 import net.micode.notes.ui.NotesPreferenceActivity;
 
+
+/*简介：字面意义是资源分析器，实际上就是获取资源并且在程序中使用，比如颜色图片等
+ * 实现方法：主要利用R.java这个类，其中包括
+ * R.id      组件资源引用
+ * R.drawable  图片资源 （被使用）
+ * R.layout  布局资源
+ * R.menu   菜单资源
+ * R.String  文字资源
+ * R.style    主题资源 （被使用）
+ * 在按顺序设置好相应的id后，就可以编写简单的getXXX函数获取需要的资源
+ * 
+ * 特殊的变量 ：
+ * @BG_DEFAULT_COLOR 默认背景颜色（黄）
+ * BG_DEFAULT_FONT_SIZE 默认文本大小（中）
+ */
+
 public class ResourceParser {
 
     public static final int YELLOW           = 0;
@@ -64,8 +80,8 @@ public class ResourceParser {
             return BG_EDIT_TITLE_RESOURCES[id];
         }
     }
-
-    public static int getDefaultBgId(Context context) {
+    //直接获取默认的背景颜色。看不太懂，这个PREFERENCE_SET_BG_COLOR_KEY是个final string,也就是说getBoolean肯定执行else，为什么要这么写
+    public static int getDefaultBgId(Context context) { 
         if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
                 NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
             return (int) (Math.random() * NoteBgResources.BG_EDIT_RESOURCES.length);
@@ -161,7 +177,8 @@ public class ResourceParser {
             R.style.TextAppearanceLarge,
             R.style.TextAppearanceSuper
         };
-
+        
+        //这里有一个容错的函数，防止输入的id大于资源总量，若如此，则自动返回默认的设置结果
         public static int getTexAppearanceResource(int id) {
             /**
              * HACKME: Fix bug of store the resource id in shared preference.
diff --git a/src/net/micode/notes/ui/AlarmAlertActivity.java b/src/net/micode/notes/ui/AlarmAlertActivity.java
index 85723be..7aab0e8 100644
--- a/src/net/micode/notes/ui/AlarmAlertActivity.java
+++ b/src/net/micode/notes/ui/AlarmAlertActivity.java
@@ -41,56 +41,80 @@ import java.io.IOException;
 
 
 public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
-    private long mNoteId;
-    private String mSnippet;
+    private long mNoteId;      //文本在数据库存储中的ID号 
+    private String mSnippet;   //闹钟提示时出现的文本片段
     private static final int SNIPPET_PREW_MAX_LEN = 60;
     MediaPlayer mPlayer;
 
     @Override
-    protected void onCreate(Bundle savedInstanceState) {
+    protected void onCreate(Bundle savedInstanceState) {    
         super.onCreate(savedInstanceState);
+        //Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的
+        //onsaveInstanceState方法是用来保存Activity的状态的
+        //能从onCreate的参数savedInsanceState中获得状态数据
         requestWindowFeature(Window.FEATURE_NO_TITLE);
+        //界面显示——无标题
 
         final Window win = getWindow();
         win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
 
         if (!isScreenOn()) {
             win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+            		//保持窗体点亮
                     | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    //将窗体点亮
                     | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    //允许窗体点亮时锁屏
                     | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
-        }
+        }//在手机锁屏后如果到了闹钟提示时间，点亮屏幕
 
         Intent intent = getIntent();
 
         try {
             mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
             mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            //根据ID从数据库中获取标签的内容；
+            //getContentResolver（）是实现数据共享，实例存储。
             mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
                     SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
                     : mSnippet;
+            //判断标签片段是否达到符合长度
         } catch (IllegalArgumentException e) {
             e.printStackTrace();
             return;
         }
-
+        /*
+        try
+        {
+        	// 代码区
+        }
+        catch(Exception e)
+        {
+        	// 异常处理
+        }
+                     代码区如果有错误，就会返回所写异常的处理。*/
         mPlayer = new MediaPlayer();
         if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
             showActionDialog();
+            //弹出对话框
             playAlarmSound();
+            //闹钟提示音激发
         } else {
             finish();
+            //完成闹钟动作
         }
     }
 
     private boolean isScreenOn() {
+    	//判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
         return pm.isScreenOn();
     }
 
     private void playAlarmSound() {
+    	//闹钟提示音激发
         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
-
+        //调用系统的铃声管理URI，得到闹钟提示音
         int silentModeStreams = Settings.System.getInt(getContentResolver(),
                 Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
 
@@ -101,12 +125,19 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         }
         try {
             mPlayer.setDataSource(this, url);
+            //方法：setDataSource(Context context, Uri uri) 
+            //解释：无返回值，设置多媒体数据来源【根据 Uri】
             mPlayer.prepare();
+            //准备同步
             mPlayer.setLooping(true);
+            //设置是否循环播放
             mPlayer.start();
+            //开始播放
         } catch (IllegalArgumentException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
+            //e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息
+            //System.out.println(e)，这个方法打印出异常，并且输出在哪里出现的异常
         } catch (SecurityException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
@@ -121,37 +152,57 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
     private void showActionDialog() {
         AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        //AlertDialog的构造方法全部是Protected的
+        //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。
+        //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
+        //如这里的dialog就是新建了一个AlertDialog
         dialog.setTitle(R.string.app_name);
+        //为对话框设置标题
         dialog.setMessage(mSnippet);
+        //为对话框设置内容
         dialog.setPositiveButton(R.string.notealert_ok, this);
+        //给对话框添加"Yes"按钮
         if (isScreenOn()) {
             dialog.setNegativeButton(R.string.notealert_enter, this);
-        }
+        }//对话框添加"No"按钮
         dialog.show().setOnDismissListener(this);
     }
 
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
+        //用which来选择click后下一步的操作
             case DialogInterface.BUTTON_NEGATIVE:
+            	//这是取消操作
                 Intent intent = new Intent(this, NoteEditActivity.class);
+                //实现两个类间的数据传输
                 intent.setAction(Intent.ACTION_VIEW);
+                //设置动作属性
                 intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                //实现key-value对
+                //EXTRA_UID为key；mNoteId为键
                 startActivity(intent);
+                //开始动作
                 break;
             default:
+            	//这是确定操作
                 break;
         }
     }
 
     public void onDismiss(DialogInterface dialog) {
+    	//忽略
         stopAlarmSound();
+        //停止闹钟声音
         finish();
+        //完成该动作
     }
 
     private void stopAlarmSound() {
         if (mPlayer != null) {
             mPlayer.stop();
+            //停止播放
             mPlayer.release();
+            //释放MediaPlayer对象
             mPlayer = null;
         }
     }
diff --git a/src/net/micode/notes/ui/AlarmInitReceiver.java b/src/net/micode/notes/ui/AlarmInitReceiver.java
index f221202..93e99a5 100644
--- a/src/net/micode/notes/ui/AlarmInitReceiver.java
+++ b/src/net/micode/notes/ui/AlarmInitReceiver.java
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,7 +12,7 @@
  * 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.ui;
 
@@ -27,25 +27,29 @@ import android.database.Cursor;
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
 
-
+//�� Android �����и��ָ����Ĺ㲥�������ص�ʹ��״̬���绰�Ľ��պͶ��ŵĽ��ն������һ���㲥��Ӧ�ó��򿪷���Ҳ���Լ�����Щ�㲥�����������߼��Ĵ���
 public class AlarmInitReceiver extends BroadcastReceiver {
 
     private static final String [] PROJECTION = new String [] {
         NoteColumns.ID,
         NoteColumns.ALERTED_DATE
     };
-
+    //对数据库的操作，调用标签ID和闹钟时间
     private static final int COLUMN_ID                = 0;
     private static final int COLUMN_ALERTED_DATE      = 1;
 
     @Override
     public void onReceive(Context context, Intent intent) {
         long currentDate = System.currentTimeMillis();
+        //System.currentTimeMillis()产生一个当前的毫秒
+        //这个毫秒其实就是自1970年1月1日0时起的毫秒数
         Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
                 PROJECTION,
                 NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
                 new String[] { String.valueOf(currentDate) },
+                //将long变量currentDate转化为字符串
                 null);
+        //Cursor在这里的作用是通过查找数据库中的标签内容，找到和当前系统时间相等的标签
 
         if (c != null) {
             if (c.moveToFirst()) {
@@ -61,5 +65,8 @@ public class AlarmInitReceiver extends BroadcastReceiver {
             }
             c.close();
         }
+        //然而通过网上查找资料发现，对于闹钟机制的启动，通常需要上面的几个步骤
+        //如新建Intent、PendingIntent以及AlarmManager等
+        //这里就是根据数据库里的闹钟时间创建一个闹钟机制
     }
 }
diff --git a/src/net/micode/notes/ui/AlarmReceiver.java b/src/net/micode/notes/ui/AlarmReceiver.java
index 54e503b..54f12e1 100644
--- a/src/net/micode/notes/ui/AlarmReceiver.java
+++ b/src/net/micode/notes/ui/AlarmReceiver.java
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
+ 
 package net.micode.notes.ui;
 
 import android.content.BroadcastReceiver;
@@ -23,8 +23,14 @@ import android.content.Intent;
 public class AlarmReceiver extends BroadcastReceiver {
     @Override
     public void onReceive(Context context, Intent intent) {
-        intent.setClass(context, AlarmAlertActivity.class);
+        intent.setClass(context, AlarmAlertActivity.class);  
+        //启动AlarmAlertActivity
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        //activity要存在于activity的栈中，而非activity的途径启动activity时必然不存在一个activity的栈
+        //所以要新起一个栈装入启动的activity
         context.startActivity(intent);
     }
 }
+//这是实现alarm这个功能最接近用户层的包，基于上面的两个包，
+//作用还需要深究但是对于setClass和addFlags的
+
diff --git a/src/net/micode/notes/ui/DateTimePicker.java b/src/net/micode/notes/ui/DateTimePicker.java
index 496b0cd..ef9f225 100644
--- a/src/net/micode/notes/ui/DateTimePicker.java
+++ b/src/net/micode/notes/ui/DateTimePicker.java
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,7 +15,7 @@
  */
 
 package net.micode.notes.ui;
-
+ 
 import java.text.DateFormatSymbols;
 import java.util.Calendar;
 
@@ -29,7 +29,8 @@ import android.widget.FrameLayout;
 import android.widget.NumberPicker;
 
 public class DateTimePicker extends FrameLayout {
-
+	//FrameLayout是布局模板之一
+	//所有的子元素全部在屏幕的右上方
     private static final boolean DEFAULT_ENABLE_STATE = true;
 
     private static final int HOURS_IN_HALF_DAY = 12;
@@ -45,13 +46,15 @@ public class DateTimePicker extends FrameLayout {
     private static final int MINUT_SPINNER_MAX_VAL = 59;
     private static final int AMPM_SPINNER_MIN_VAL = 0;
     private static final int AMPM_SPINNER_MAX_VAL = 1;
-
+    //初始化控件
     private final NumberPicker mDateSpinner;
     private final NumberPicker mHourSpinner;
     private final NumberPicker mMinuteSpinner;
     private final NumberPicker mAmPmSpinner;
+    //NumberPicker是数字选择器
+    //这里定义的四个变量全部是在设置闹钟时需要选择的变量（如日期、时、分、上午或者下午）
     private Calendar mDate;
-
+    //定义了Calendar类型的变量mDate，用于操作时间
     private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
 
     private boolean mIsAm;
@@ -71,41 +74,49 @@ public class DateTimePicker extends FrameLayout {
             updateDateControl();
             onDateTimeChanged();
         }
-    };
+    };//OnValueChangeListener，这是时间改变监听器，这里主要是对日期的监听
+    //将现在日期的值传递给mDate；updateDateControl是同步操作
 
     private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
-        @Override
+        //这里是对 小时（Hour） 的监听
+    	@Override
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             boolean isDateChanged = false;
             Calendar cal = Calendar.getInstance();
+            //声明一个Calendar的变量cal，便于后续的操作
             if (!mIs24HourView) {
                 if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, 1);
                     isDateChanged = true;
+                    //这里是对于12小时制时，晚上11点和12点交替时对日期的更改
                 } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, -1);
                     isDateChanged = true;
-                }
+                } 
+                //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
                 if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
                         oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
                     mIsAm = !mIsAm;
                     updateAmPmControl();
-                }
+                }//这里是对于12小时制时，中午11点和12点交替时对AM和PM的更改
             } else {
                 if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, 1);
                     isDateChanged = true;
+                    //这里是对于24小时制时，晚上11点和12点交替时对日期的更改
                 } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, -1);
                     isDateChanged = true;
                 }
-            }
+            } //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
             int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
+            //通过数字选择器对newHour的赋值
             mDate.set(Calendar.HOUR_OF_DAY, newHour);
+            //通过set函数将新的Hour值传给mDate
             onDateTimeChanged();
             if (isDateChanged) {
                 setCurrentYear(cal.get(Calendar.YEAR));
@@ -117,15 +128,19 @@ public class DateTimePicker extends FrameLayout {
 
     private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
         @Override
+        //这里是对 分钟（Minute）改变的监听
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             int minValue = mMinuteSpinner.getMinValue();
             int maxValue = mMinuteSpinner.getMaxValue();
             int offset = 0;
+            //设置offset，作为小时改变的一个记录数据
             if (oldVal == maxValue && newVal == minValue) {
                 offset += 1;
             } else if (oldVal == minValue && newVal == maxValue) {
                 offset -= 1;
             }
+            //如果原值为59，新值为0，则offset加1
+            //如果原值为0，新值为59，则offset减1
             if (offset != 0) {
                 mDate.add(Calendar.HOUR_OF_DAY, offset);
                 mHourSpinner.setValue(getCurrentHour());
@@ -145,7 +160,8 @@ public class DateTimePicker extends FrameLayout {
     };
 
     private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
-        @Override
+        //对AM和PM的监听
+    	@Override
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             mIsAm = !mIsAm;
             if (mIsAm) {
@@ -165,19 +181,22 @@ public class DateTimePicker extends FrameLayout {
 
     public DateTimePicker(Context context) {
         this(context, System.currentTimeMillis());
-    }
+    }//通过对数据库的访问，获取当前的系统时间
 
     public DateTimePicker(Context context, long date) {
         this(context, date, DateFormat.is24HourFormat(context));
-    }
+    }//上面函数的得到的是一个天文数字（1970至今的秒数），需要DateFormat将其变得有意义
 
     public DateTimePicker(Context context, long date, boolean is24HourView) {
         super(context);
+        //获取系统时间
         mDate = Calendar.getInstance();
         mInitialising = true;
         mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
         inflate(context, R.layout.datetime_picker, this);
-
+        //如果当前Activity里用到别的layout，比如对话框layout
+        //还要设置这个layout上的其他组件的内容，就必须用inflate()方法先将对话框的layout找出来
+        //然后再用findViewById()找到它上面的其它组件
         mDateSpinner = (NumberPicker) findViewById(R.id.date);
         mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
         mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
@@ -185,8 +204,8 @@ public class DateTimePicker extends FrameLayout {
 
         mHourSpinner = (NumberPicker) findViewById(R.id.hour);
         mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
-        mMinuteSpinner =  (NumberPicker) findViewById(R.id.minute);
-        mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
+        mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
+        mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);  
         mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
         mMinuteSpinner.setOnLongPressUpdateInterval(100);
         mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
@@ -226,7 +245,9 @@ public class DateTimePicker extends FrameLayout {
         mAmPmSpinner.setEnabled(enabled);
         mIsEnabled = enabled;
     }
-
+    //存在疑问！！！！！！！！！！！！！setEnabled的作用
+    //下面的代码通过原程序的注释已经比较清晰，另外可以通过函数名来判断
+    //下面的各函数主要是对上面代码引用到的各函数功能的实现
     @Override
     public boolean isEnabled() {
         return mIsEnabled;
@@ -239,7 +260,7 @@ public class DateTimePicker extends FrameLayout {
      */
     public long getCurrentDateInTimeMillis() {
         return mDate.getTimeInMillis();
-    }
+    }//实现函数——得到当前的秒数
 
     /**
      * Set the current date
@@ -251,7 +272,7 @@ public class DateTimePicker extends FrameLayout {
         cal.setTimeInMillis(date);
         setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
                 cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
-    }
+    }//实现函数功能——设置当前的时间，参数是date
 
     /**
      * Set the current date
@@ -269,13 +290,14 @@ public class DateTimePicker extends FrameLayout {
         setCurrentDay(dayOfMonth);
         setCurrentHour(hourOfDay);
         setCurrentMinute(minute);
-    }
+    }//实现函数功能——设置当前的时间，参数是各详细的变量
 
     /**
      * Get current year
      *
      * @return The current year
      */
+    //下面是得到year、month、day等值
     public int getCurrentYear() {
         return mDate.get(Calendar.YEAR);
     }
@@ -347,7 +369,7 @@ public class DateTimePicker extends FrameLayout {
     public int getCurrentHourOfDay() {
         return mDate.get(Calendar.HOUR_OF_DAY);
     }
-
+ 
     private int getCurrentHour() {
         if (mIs24HourView){
             return getCurrentHourOfDay();
@@ -446,7 +468,7 @@ public class DateTimePicker extends FrameLayout {
         mDateSpinner.setDisplayedValues(mDateDisplayValues);
         mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
         mDateSpinner.invalidate();
-    }
+    }// 对于星期几的算法
 
     private void updateAmPmControl() {
         if (mIs24HourView) {
@@ -455,7 +477,7 @@ public class DateTimePicker extends FrameLayout {
             int index = mIsAm ? Calendar.AM : Calendar.PM;
             mAmPmSpinner.setValue(index);
             mAmPmSpinner.setVisibility(View.VISIBLE);
-        }
+        }// 对于上下午操作的算法
     }
 
     private void updateHourControl() {
@@ -465,7 +487,7 @@ public class DateTimePicker extends FrameLayout {
         } else {
             mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
             mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
-        }
+        }// 对与小时的算法
     }
 
     /**
@@ -480,6 +502,6 @@ public class DateTimePicker extends FrameLayout {
         if (mOnDateTimeChangedListener != null) {
             mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(),
                     getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute());
-        }
+        }  
     }
 }
diff --git a/src/net/micode/notes/ui/DateTimePickerDialog.java b/src/net/micode/notes/ui/DateTimePickerDialog.java
index 2c47ba4..80adcc4 100644
--- a/src/net/micode/notes/ui/DateTimePickerDialog.java
+++ b/src/net/micode/notes/ui/DateTimePickerDialog.java
@@ -32,18 +32,25 @@ import android.text.format.DateUtils;
 public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
 
     private Calendar mDate = Calendar.getInstance();
+    //创建一个Calendar类型的变量 mDate，方便时间的操作
     private boolean mIs24HourView;
     private OnDateTimeSetListener mOnDateTimeSetListener;
+    //声明一个时间日期滚动选择控件 mOnDateTimeSetListener
     private DateTimePicker mDateTimePicker;
+    //DateTimePicker控件，控件一般用于让用户可以从日期列表中选择单个值。
+    //运行时，单击控件边上的下拉箭头，会显示为两个部分：一个下拉列表，一个用于选择日期的
 
     public interface OnDateTimeSetListener {
         void OnDateTimeSet(AlertDialog dialog, long date);
     }
 
     public DateTimePickerDialog(Context context, long date) {
+    	//对该界面对话框的实例化
         super(context);
+        //对数据库的操作
         mDateTimePicker = new DateTimePicker(context);
         setView(mDateTimePicker);
+        //添加一个子视图
         mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
             public void onDateTimeChanged(DateTimePicker view, int year, int month,
                     int dayOfMonth, int hourOfDay, int minute) {
@@ -52,15 +59,20 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
                 mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                 mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
                 mDate.set(Calendar.MINUTE, minute);
+                //将视图中的各选项设置为系统当前时间
                 updateTitle(mDate.getTimeInMillis());
             }
         });
         mDate.setTimeInMillis(date);
+        //得到系统时间
         mDate.set(Calendar.SECOND, 0);
+        //将秒数设置为0
         mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
         setButton(context.getString(R.string.datetime_dialog_ok), this);
         setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
+        //设置按钮
         set24HourView(DateFormat.is24HourFormat(this.getContext()));
+        //时间标准化打印
         updateTitle(mDate.getTimeInMillis());
     }
 
@@ -70,7 +82,7 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
 
     public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
         mOnDateTimeSetListener = callBack;
-    }
+    }//将时间日期滚动选择控件实例化
 
     private void updateTitle(long date) {
         int flag =
@@ -79,12 +91,13 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
             DateUtils.FORMAT_SHOW_TIME;
         flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
         setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
-    }
+    }//android开发中常见日期管理工具类（API）——DateUtils：按照上下午显示时间
 
     public void onClick(DialogInterface arg0, int arg1) {
         if (mOnDateTimeSetListener != null) {
             mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
         }
-    }
+    }//第一个参数arg0是接收到点击事件的对话框
+    //第二个参数arg1是该对话框上的按钮
 
 }
\ No newline at end of file
diff --git a/src/net/micode/notes/ui/DropdownMenu.java b/src/net/micode/notes/ui/DropdownMenu.java
index 613dc74..3e7386c 100644
--- a/src/net/micode/notes/ui/DropdownMenu.java
+++ b/src/net/micode/notes/ui/DropdownMenu.java
@@ -30,14 +30,18 @@ import net.micode.notes.R;
 public class DropdownMenu {
     private Button mButton;
     private PopupMenu mPopupMenu;
+    //声明一个下拉菜单
     private Menu mMenu;
 
     public DropdownMenu(Context context, Button button, int menuId) {
         mButton = button;
         mButton.setBackgroundResource(R.drawable.dropdown_icon);
+        //设置这个view的背景
         mPopupMenu = new PopupMenu(context, mButton);
         mMenu = mPopupMenu.getMenu();
         mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
+        //MenuInflater是用来实例化Menu目录下的Menu布局文件
+        //根据ID来确认menu的内容选项
         mButton.setOnClickListener(new OnClickListener() {
             public void onClick(View v) {
                 mPopupMenu.show();
@@ -48,14 +52,14 @@ public class DropdownMenu {
     public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
         if (mPopupMenu != null) {
             mPopupMenu.setOnMenuItemClickListener(listener);
-        }
+        }//设置菜单的监听
     }
 
     public MenuItem findItem(int id) {
         return mMenu.findItem(id);
-    }
+    }//对于菜单选项的初始化，根据索引搜索菜单需要的选项
 
     public void setTitle(CharSequence title) {
         mButton.setText(title);
-    }
+    }//布局文件，设置标题
 }
diff --git a/src/net/micode/notes/ui/FoldersListAdapter.java b/src/net/micode/notes/ui/FoldersListAdapter.java
index 96b77da..43d5aa4 100644
--- a/src/net/micode/notes/ui/FoldersListAdapter.java
+++ b/src/net/micode/notes/ui/FoldersListAdapter.java
@@ -30,10 +30,14 @@ import net.micode.notes.data.Notes.NoteColumns;
 
 
 public class FoldersListAdapter extends CursorAdapter {
+	//CursorAdapter是Cursor和ListView的接口
+	//FoldersListAdapter继承了CursorAdapter的类
+	//主要作用是便签数据库和用户的交互
+	//这里就是用folder（文件夹）的形式展现给用户
     public static final String [] PROJECTION = {
         NoteColumns.ID,
         NoteColumns.SNIPPET
-    };
+    };//调用数据库中便签的ID和片段
 
     public static final int ID_COLUMN   = 0;
     public static final int NAME_COLUMN = 1;
@@ -41,12 +45,13 @@ public class FoldersListAdapter extends CursorAdapter {
     public FoldersListAdapter(Context context, Cursor c) {
         super(context, c);
         // TODO Auto-generated constructor stub
-    }
+    }//数据库操作
 
     @Override
     public View newView(Context context, Cursor cursor, ViewGroup parent) {
-        return new FolderListItem(context);
-    }
+        //ViewGroup是容器
+    	return new FolderListItem(context);
+    }//创建一个文件夹，对于各文件夹中子标签的初始化
 
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
@@ -55,20 +60,22 @@ public class FoldersListAdapter extends CursorAdapter {
                     .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
             ((FolderListItem) view).bind(folderName);
         }
-    }
+    }//将各个布局文件绑定起来
 
     public String getFolderName(Context context, int position) {
         Cursor cursor = (Cursor) getItem(position);
         return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
                 .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
-    }
+    }//根据数据库中标签的ID得到标签的各项内容
 
     private class FolderListItem extends LinearLayout {
         private TextView mName;
 
         public FolderListItem(Context context) {
             super(context);
+            //操作数据库
             inflate(context, R.layout.folder_list_item, this);
+            //根据布局文件的名字等信息将其找出来
             mName = (TextView) findViewById(R.id.tv_folder_name);
         }
 
diff --git a/src/net/micode/notes/ui/NoteEditActivity.java b/src/net/micode/notes/ui/NoteEditActivity.java
index 96a9ff8..fefcc5b 100644
--- a/src/net/micode/notes/ui/NoteEditActivity.java
+++ b/src/net/micode/notes/ui/NoteEditActivity.java
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,7 +15,7 @@
  */
 
 package net.micode.notes.ui;
-
+ 
 import android.app.Activity;
 import android.app.AlarmManager;
 import android.app.AlertDialog;
@@ -74,6 +74,8 @@ import java.util.regex.Pattern;
 
 public class NoteEditActivity extends Activity implements OnClickListener,
         NoteSettingChangedListener, OnTextViewChangeListener {
+	//该类主要是针对标签的编辑
+	//继承了系统内部许多和监听有关的类
     private class HeadViewHolder {
         public TextView tvModified;
 
@@ -83,7 +85,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
         public ImageView ibSetBgColor;
     }
-
+    //使用Map实现数据存储
     private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
     static {
         sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
@@ -91,6 +93,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sBgSelectorBtnsMap.put(R.id.iv_bg_blue, ResourceParser.BLUE);
         sBgSelectorBtnsMap.put(R.id.iv_bg_green, ResourceParser.GREEN);
         sBgSelectorBtnsMap.put(R.id.iv_bg_white, ResourceParser.WHITE);
+        //put函数是将指定值和指定键相连
     }
 
     private static final Map<Integer, Integer> sBgSelectorSelectionMap = new HashMap<Integer, Integer>();
@@ -100,6 +103,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sBgSelectorSelectionMap.put(ResourceParser.BLUE, R.id.iv_bg_blue_select);
         sBgSelectorSelectionMap.put(ResourceParser.GREEN, R.id.iv_bg_green_select);
         sBgSelectorSelectionMap.put(ResourceParser.WHITE, R.id.iv_bg_white_select);
+        //put函数是将指定值和指定键相连
     }
 
     private static final Map<Integer, Integer> sFontSizeBtnsMap = new HashMap<Integer, Integer>();
@@ -108,6 +112,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sFontSizeBtnsMap.put(R.id.ll_font_small, ResourceParser.TEXT_SMALL);
         sFontSizeBtnsMap.put(R.id.ll_font_normal, ResourceParser.TEXT_MEDIUM);
         sFontSizeBtnsMap.put(R.id.ll_font_super, ResourceParser.TEXT_SUPER);
+        //put函数是将指定值和指定键相连
     }
 
     private static final Map<Integer, Integer> sFontSelectorSelectionMap = new HashMap<Integer, Integer>();
@@ -116,6 +121,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_SMALL, R.id.iv_small_select);
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_MEDIUM, R.id.iv_medium_select);
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_SUPER, R.id.iv_super_select);
+        //put函数是将指定值和指定键相连
     }
 
     private static final String TAG = "NoteEditActivity";
@@ -123,20 +129,23 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     private HeadViewHolder mNoteHeaderHolder;
 
     private View mHeadViewPanel;
-
+    //私有化一个界面操作mHeadViewPanel，对表头的操作
     private View mNoteBgColorSelector;
-
+    //私有化一个界面操作mNoteBgColorSelector，对背景颜色的操作
     private View mFontSizeSelector;
-
+    //私有化一个界面操作mFontSizeSelector，对标签字体的操作
     private EditText mNoteEditor;
-
+    //声明编辑控件，对文本操作
     private View mNoteEditorPanel;
-
-    private WorkingNote mWorkingNote;
-
+    //私有化一个界面操作mNoteEditorPanel，文本编辑的控制板
+    //private WorkingNote mWorkingNote;
+    public WorkingNote mWorkingNote;
+    //对模板WorkingNote的初始化
     private SharedPreferences mSharedPrefs;
+    //私有化SharedPreferences的数据存储方式
+    //它的本质是基于XML文件存储key-value键值对数据
     private int mFontSizeId;
-
+    //用于操作字体的大小
     private static final String PREFERENCE_FONT_SIZE = "pref_font_size";
 
     private static final int SHORTCUT_ICON_TITLE_MAX_LEN = 10;
@@ -145,7 +154,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     public static final String TAG_UNCHECKED = String.valueOf('\u25A1');
 
     private LinearLayout mEditTextList;
-
+    //线性布局
     private String mUserQuery;
     private Pattern mPattern;
 
@@ -153,7 +162,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         this.setContentView(R.layout.note_edit);
-
+        //对数据库的访问操作
         if (savedInstanceState == null && !initActivityState(getIntent())) {
             finish();
             return;
@@ -176,7 +185,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                 return;
             }
             Log.d(TAG, "Restoring from killed activity");
-        }
+        }//为防止内存不足时程序的终止，在这里有一个保存现场的函数
     }
 
     private boolean initActivityState(Intent intent) {
@@ -188,34 +197,42 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (TextUtils.equals(Intent.ACTION_VIEW, intent.getAction())) {
             long noteId = intent.getLongExtra(Intent.EXTRA_UID, 0);
             mUserQuery = "";
-
+            //如果用户实例化标签时，系统并未给出标签ID
             /**
              * Starting from the searched result
              */
+            //根据键值查找ID
             if (intent.hasExtra(SearchManager.EXTRA_DATA_KEY)) {
                 noteId = Long.parseLong(intent.getStringExtra(SearchManager.EXTRA_DATA_KEY));
                 mUserQuery = intent.getStringExtra(SearchManager.USER_QUERY);
             }
-
+            //如果ID在数据库中未找到
             if (!DataUtils.visibleInNoteDatabase(getContentResolver(), noteId, Notes.TYPE_NOTE)) {
                 Intent jump = new Intent(this, NotesListActivity.class);
                 startActivity(jump);
+                //程序将跳转到上面声明的intent——jump
                 showToast(R.string.error_note_not_exist);
                 finish();
                 return false;
-            } else {
+            } 
+            //ID在数据库中找到
+            else {
                 mWorkingNote = WorkingNote.load(this, noteId);
                 if (mWorkingNote == null) {
                     Log.e(TAG, "load note failed with note id" + noteId);
+                    //打印出红色的错误信息
                     finish();
                     return false;
                 }
             }
+            //setSoftInputMode——软键盘输入模式
             getWindow().setSoftInputMode(
                     WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN
                             | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
         } else if(TextUtils.equals(Intent.ACTION_INSERT_OR_EDIT, intent.getAction())) {
-            // New note
+            // intent.getAction()
+        	// 大多用于broadcast发送广播时给机制（intent）设置一个action，就是一个字符串 
+        	// 用户可以通过receive（接受）intent，通过 getAction得到的字符串，来决定做什么
             long folderId = intent.getLongExtra(Notes.INTENT_EXTRA_FOLDER_ID, 0);
             int widgetId = intent.getIntExtra(Notes.INTENT_EXTRA_WIDGET_ID,
                     AppWidgetManager.INVALID_APPWIDGET_ID);
@@ -223,7 +240,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                     Notes.TYPE_WIDGET_INVALIDE);
             int bgResId = intent.getIntExtra(Notes.INTENT_EXTRA_BACKGROUND_ID,
                     ResourceParser.getDefaultBgId(this));
-
+            // intent.getInt（Long、String）Extra是对各变量的语法分析
             // Parse call-record note
             String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
             long callDate = intent.getLongExtra(Notes.INTENT_EXTRA_CALL_DATE, 0);
@@ -240,15 +257,17 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                         finish();
                         return false;
                     }
+                    //将电话号码与手机的号码簿相关
                 } else {
                     mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId,
                             widgetType, bgResId);
                     mWorkingNote.convertToCallNote(phoneNumber, callDate);
+                    //
                 }
             } else {
                 mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId, widgetType,
                         bgResId);
-            }
+            }//创建一个新的WorkingNote
 
             getWindow().setSoftInputMode(
                     WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
@@ -269,8 +288,10 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     private void initNoteScreen() {
+    	//对界面的初始化操作
         mNoteEditor.setTextAppearance(this, TextAppearanceResources
                 .getTexAppearanceResource(mFontSizeId));
+        //设置外观
         if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
             switchToListMode(mWorkingNote.getContent());
         } else {
@@ -294,18 +315,21 @@ public class NoteEditActivity extends Activity implements OnClickListener,
          */
         showAlertHeader();
     }
-
+    //设置闹钟的显示
     private void showAlertHeader() {
         if (mWorkingNote.hasClockAlert()) {
             long time = System.currentTimeMillis();
             if (time > mWorkingNote.getAlertDate()) {
                 mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired);
-            } else {
+            } 
+            //如果系统时间大于了闹钟设置的时间，那么闹钟失效
+            else {
                 mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
                         mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));
             }
             mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE);
             mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE);
+            //显示闹钟开启的图标
         } else {
             mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE);
             mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE);
@@ -329,26 +353,29 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (!mWorkingNote.existInDatabase()) {
             saveNote();
         }
+        //在创建一个新的标签时，先在数据库中匹配
+        //如果不存在，那么先在数据库中存储
         outState.putLong(Intent.EXTRA_UID, mWorkingNote.getNoteId());
         Log.d(TAG, "Save working note id: " + mWorkingNote.getNoteId() + " onSaveInstanceState");
     }
 
     @Override
+    //MotionEvent是对屏幕触控的传递机制
     public boolean dispatchTouchEvent(MotionEvent ev) {
         if (mNoteBgColorSelector.getVisibility() == View.VISIBLE
                 && !inRangeOfView(mNoteBgColorSelector, ev)) {
             mNoteBgColorSelector.setVisibility(View.GONE);
             return true;
-        }
+        }//颜色选择器在屏幕上可见
 
         if (mFontSizeSelector.getVisibility() == View.VISIBLE
                 && !inRangeOfView(mFontSizeSelector, ev)) {
             mFontSizeSelector.setVisibility(View.GONE);
             return true;
-        }
+        }//字体大小选择器在屏幕上可见
         return super.dispatchTouchEvent(ev);
     }
-
+    //对屏幕触控的坐标进行操作
     private boolean inRangeOfView(View view, MotionEvent ev) {
         int []location = new int[2];
         view.getLocationOnScreen(location);
@@ -357,7 +384,9 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (ev.getX() < x
                 || ev.getX() > (x + view.getWidth())
                 || ev.getY() < y
-                || ev.getY() > (y + view.getHeight())) {
+                || ev.getY() > (y + view.getHeight()))
+        //如果触控的位置超出了给定的范围，返回false
+        {
                     return false;
                 }
         return true;
@@ -377,13 +406,13 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         for (int id : sBgSelectorBtnsMap.keySet()) {
             ImageView iv = (ImageView) findViewById(id);
             iv.setOnClickListener(this);
-        }
+        }//对标签各项属性内容的初始化
 
         mFontSizeSelector = findViewById(R.id.font_size_selector);
         for (int id : sFontSizeBtnsMap.keySet()) {
             View view = findViewById(id);
             view.setOnClickListener(this);
-        };
+        };//对字体大小的选择
         mSharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
         mFontSizeId = mSharedPrefs.getInt(PREFERENCE_FONT_SIZE, ResourceParser.BG_DEFAULT_FONT_SIZE);
         /**
@@ -405,7 +434,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         clearSettingState();
     }
-
+    //和桌面小工具的同步
     private void updateWidget() {
         Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
         if (mWorkingNote.getWidgetType() == Notes.TYPE_WIDGET_2X) {
@@ -450,7 +479,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             }
             mFontSizeSelector.setVisibility(View.GONE);
         }
-    }
+    }//************************存在问题
 
     @Override
     public void onBackPressed() {
@@ -481,6 +510,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     @Override
+    //对选择菜单的准备
     public boolean onPrepareOptionsMenu(Menu menu) {
         if (isFinishing()) {
             return true;
@@ -489,6 +519,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         menu.clear();
         if (mWorkingNote.getFolderId() == Notes.ID_CALL_RECORD_FOLDER) {
             getMenuInflater().inflate(R.menu.call_note_edit, menu);
+            // MenuInflater是用来实例化Menu目录下的Menu布局文件的
         } else {
             getMenuInflater().inflate(R.menu.note_edit, menu);
         }
@@ -506,45 +537,71 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     @Override
+    /*
+     * 函数功能：动态改变菜单选项内容
+     * 函数实现：如下注释
+     */
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
+        //根据菜单的id来编剧相关项目
             case R.id.menu_new_note:
+            	//创建一个新的便签
                 createNewNote();
                 break;
             case R.id.menu_delete:
+            	//删除便签
                 AlertDialog.Builder builder = new AlertDialog.Builder(this);
+                //创建关于删除操作的对话框
                 builder.setTitle(getString(R.string.alert_title_delete));
+                // 设置标签的标题为alert_title_delete
                 builder.setIcon(android.R.drawable.ic_dialog_alert);
+                //设置对话框图标
                 builder.setMessage(getString(R.string.alert_message_delete_note));
+                //设置对话框内容
                 builder.setPositiveButton(android.R.string.ok,
                         new DialogInterface.OnClickListener() {
+                	//建立按键监听器
                             public void onClick(DialogInterface dialog, int which) {
+                            	//点击所触发事件
                                 deleteCurrentNote();
+                                //  删除单签便签
                                 finish();
                             }
                         });
+                //添加“YES”按钮
                 builder.setNegativeButton(android.R.string.cancel, null);
+                //添加“NO”的按钮
                 builder.show();
+                //显示对话框
                 break;
             case R.id.menu_font_size:
+            //字体大小的编辑
                 mFontSizeSelector.setVisibility(View.VISIBLE);
+            // 将字体选择器置为可见
                 findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE);
+            // 通过id找到相应的大小
                 break;
             case R.id.menu_list_mode:
+            	//选择列表模式
                 mWorkingNote.setCheckListMode(mWorkingNote.getCheckListMode() == 0 ?
                         TextNote.MODE_CHECK_LIST : 0);
                 break;
             case R.id.menu_share:
+            	//菜单共享
                 getWorkingText();
                 sendTo(this, mWorkingNote.getContent());
+                // 用sendto函数将运行文本发送到遍历的本文内
                 break;
             case R.id.menu_send_to_desktop:
+            	//发送到桌面
                 sendToDesktop();
                 break;
             case R.id.menu_alert:
+            	//创建提醒器
                 setReminder();
                 break;
             case R.id.menu_delete_remind:
+            	//删除日期提醒
                 mWorkingNote.setAlertDate(0, false);
                 break;
             default:
@@ -553,111 +610,170 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         return true;
     }
 
+    /*
+     * 函数功能：建立事件提醒器
+     * 函数实现：如下注释
+     */
     private void setReminder() {
         DateTimePickerDialog d = new DateTimePickerDialog(this, System.currentTimeMillis());
+        // 建立修改时间日期的对话框
         d.setOnDateTimeSetListener(new OnDateTimeSetListener() {
             public void OnDateTimeSet(AlertDialog dialog, long date) {
                 mWorkingNote.setAlertDate(date	, true);
+                //选择提醒的日期
             }
-        });
+        }); 
+        //建立时间日期的监听器
         d.show();
+        //显示对话框
     }
 
     /**
      * Share note to apps that support {@link Intent#ACTION_SEND} action
      * and {@text/plain} type
      */
+    /*
+     * 函数功能：共享便签
+     * 函数实现：如下注释
+     */
     private void sendTo(Context context, String info) {
         Intent intent = new Intent(Intent.ACTION_SEND);
+        //建立intent链接选项
         intent.putExtra(Intent.EXTRA_TEXT, info);
+        //将需要传递的便签信息放入text文件中
         intent.setType("text/plain");
+        //编辑连接器的类型
         context.startActivity(intent);
+        //在acti中进行链接
     }
 
+    /*
+     * 函数功能：创建一个新的便签
+     * 函数实现：如下注释
+     */
     private void createNewNote() {
         // Firstly, save current editing notes
+    	//保存当前便签
         saveNote();
 
         // For safety, start a new NoteEditActivity
         finish();
         Intent intent = new Intent(this, NoteEditActivity.class);
+        //设置链接器
         intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
+        //该活动定义为创建或编辑
         intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mWorkingNote.getFolderId());
+        //将运行便签的id添加到INTENT_EXTRA_FOLDER_ID标记中
         startActivity(intent);
+        //开始activity并链接
     }
 
+    /*
+     * 函数功能：删除当前便签
+     * 函数实现：如下注释
+     */
     private void deleteCurrentNote() {
         if (mWorkingNote.existInDatabase()) {
+        	//假如当前运行的便签内存有数据
             HashSet<Long> ids = new HashSet<Long>();
             long id = mWorkingNote.getNoteId();
             if (id != Notes.ID_ROOT_FOLDER) {
                 ids.add(id);
+            //如果不是头文件夹建立一个hash表把便签id存起来
             } else {
                 Log.d(TAG, "Wrong note id, should not happen");
+                //否则报错
             }
             if (!isSyncMode()) {
+            	//在非同步模式情况下
+            	//删除操作
                 if (!DataUtils.batchDeleteNotes(getContentResolver(), ids)) {
                     Log.e(TAG, "Delete Note error");
                 }
             } else {
+            	 //同步模式
+            	//移动至垃圾文件夹的操作
                 if (!DataUtils.batchMoveToFolder(getContentResolver(), ids, Notes.ID_TRASH_FOLER)) {
                     Log.e(TAG, "Move notes to trash folder error, should not happens");
                 }
             }
         }
         mWorkingNote.markDeleted(true);
+        //将这些标签的删除标记置为true
     }
 
+    /*
+     * 函数功能：判断是否为同步模式
+     * 函数实现：直接看NotesPreferenceActivity中同步名称是否为空
+     */
     private boolean isSyncMode() {
         return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
     }
 
+    /*
+     * 函数功能：设置提醒时间
+     * 函数实现：如下注释
+     */
     public void onClockAlertChanged(long date, boolean set) {
         /**
          * User could set clock to an unsaved note, so before setting the
          * alert clock, we should save the note first
          */
         if (!mWorkingNote.existInDatabase()) {
+        	//首先保存已有的便签
             saveNote();
         }
         if (mWorkingNote.getNoteId() > 0) {
             Intent intent = new Intent(this, AlarmReceiver.class);
             intent.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mWorkingNote.getNoteId()));
+            //若有有运行的便签就是建立一个链接器将标签id都存在uri中
             PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
             AlarmManager alarmManager = ((AlarmManager) getSystemService(ALARM_SERVICE));
+            //设置提醒管理器
             showAlertHeader();
             if(!set) {
                 alarmManager.cancel(pendingIntent);
             } else {
                 alarmManager.set(AlarmManager.RTC_WAKEUP, date, pendingIntent);
             }
+            //如果用户设置了时间，就通过提醒管理器设置一个监听事项
         } else {
             /**
              * There is the condition that user has input nothing (the note is
              * not worthy saving), we have no note id, remind the user that he
              * should input something
-             */
+             */ 
+        	//没有运行的便签就报错
             Log.e(TAG, "Clock alert setting error");
             showToast(R.string.error_note_empty_for_clock);
         }
     }
 
+    /*
+     * 函数功能：Widget发生改变的所触发的事件
+     */
     public void onWidgetChanged() {
-        updateWidget();
+        updateWidget();//更新Widget
     }
 
+    /*
+     * 函数功能： 删除编辑文本框所触发的事件
+     * 函数实现：如下注释
+     */
     public void onEditTextDelete(int index, String text) {
         int childCount = mEditTextList.getChildCount();
         if (childCount == 1) {
             return;
         }
-
+        //没有编辑框的话直接返回
         for (int i = index + 1; i < childCount; i++) {
             ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
                     .setIndex(i - 1);
+            //通过id把编辑框存在便签编辑框中
         }
 
         mEditTextList.removeViewAt(index);
+        //删除特定位置的视图
         NoteEditText edit = null;
         if(index == 0) {
             edit = (NoteEditText) mEditTextList.getChildAt(0).findViewById(
@@ -666,69 +782,101 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             edit = (NoteEditText) mEditTextList.getChildAt(index - 1).findViewById(
                     R.id.et_edit_text);
         }
+        //通过id把编辑框存在空的NoteEditText中
         int length = edit.length();
         edit.append(text);
-        edit.requestFocus();
-        edit.setSelection(length);
+        edit.requestFocus();//请求优先完成该此 编辑
+        edit.setSelection(length);//定位到length位置处的条目
     }
 
+    /*
+     * 函数功能：进入编辑文本框所触发的事件
+     * 函数实现：如下注释
+     */
     public void onEditTextEnter(int index, String text) {
         /**
          * Should not happen, check for debug
          */
         if(index > mEditTextList.getChildCount()) {
             Log.e(TAG, "Index out of mEditTextList boundrary, should not happen");
+            //越界把偶偶
         }
 
         View view = getListItem(text, index);
         mEditTextList.addView(view, index);
+        //建立一个新的视图并添加到编辑文本框内
         NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
-        edit.requestFocus();
-        edit.setSelection(0);
+        edit.requestFocus();//请求优先操作
+        edit.setSelection(0);//定位到起始位置
         for (int i = index + 1; i < mEditTextList.getChildCount(); i++) {
             ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
                     .setIndex(i);
+            //遍历子文本框并设置对应对下标
         }
     }
 
+    /*
+     * 函数功能：切换至列表模式
+     * 函数实现：如下注释
+     */
     private void switchToListMode(String text) {
         mEditTextList.removeAllViews();
         String[] items = text.split("\n");
         int index = 0;
+        //清空所有视图，初始化下标
         for (String item : items) {
             if(!TextUtils.isEmpty(item)) {
                 mEditTextList.addView(getListItem(item, index));
                 index++;
+                //遍历所有文本单元并添加到文本框中
             }
         }
         mEditTextList.addView(getListItem("", index));
         mEditTextList.getChildAt(index).findViewById(R.id.et_edit_text).requestFocus();
+        //优先请求此操作
 
         mNoteEditor.setVisibility(View.GONE);
+        //便签编辑器不可见
         mEditTextList.setVisibility(View.VISIBLE);
+        //将文本编辑框置为可见
     }
 
+    /*
+     * 函数功能：获取高亮效果的反馈情况
+     * 函数实现：如下注释
+     */
     private Spannable getHighlightQueryResult(String fullText, String userQuery) {
         SpannableString spannable = new SpannableString(fullText == null ? "" : fullText);
+        //新建一个效果选项
         if (!TextUtils.isEmpty(userQuery)) {
             mPattern = Pattern.compile(userQuery);
+            //将用户的询问进行解析
             Matcher m = mPattern.matcher(fullText);
+            //建立一个状态机检查Pattern并进行匹配
             int start = 0;
             while (m.find(start)) {
                 spannable.setSpan(
                         new BackgroundColorSpan(this.getResources().getColor(
                                 R.color.user_query_highlight)), m.start(), m.end(),
                         Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
+                //设置背景颜色
                 start = m.end();
+                //跟新起始位置
             }
         }
         return spannable;
     }
 
+    /*
+     * 函数功能：获取列表项
+     * 函数实现：如下注释
+     */
     private View getListItem(String item, int index) {
         View view = LayoutInflater.from(this).inflate(R.layout.note_edit_list_item, null);
+        //创建一个视图
         final NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
         edit.setTextAppearance(this, TextAppearanceResources.getTexAppearanceResource(mFontSizeId));
+        //创建一个文本编辑框并设置可见性
         CheckBox cb = ((CheckBox) view.findViewById(R.id.cb_edit_item));
         cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
@@ -739,12 +887,15 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                 }
             }
         });
+        //建立一个打钩框并设置监听器
 
         if (item.startsWith(TAG_CHECKED)) {
+        	//选择勾选
             cb.setChecked(true);
             edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
             item = item.substring(TAG_CHECKED.length(), item.length()).trim();
         } else if (item.startsWith(TAG_UNCHECKED)) {
+        	//选择不勾选
             cb.setChecked(false);
             edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
             item = item.substring(TAG_UNCHECKED.length(), item.length()).trim();
@@ -753,61 +904,94 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         edit.setOnTextViewChangeListener(this);
         edit.setIndex(index);
         edit.setText(getHighlightQueryResult(item, mUserQuery));
+        //运行编辑框的监听器对该行为作出反应，并设置下标及文本内容
         return view;
     }
 
+    /*
+     * 函数功能：便签内容发生改变所 触发的事件
+     * 函数实现：如下注释
+     */
     public void onTextChange(int index, boolean hasText) {
         if (index >= mEditTextList.getChildCount()) {
             Log.e(TAG, "Wrong index, should not happen");
             return;
+            //越界报错
         }
         if(hasText) {
             mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.VISIBLE);
         } else {
             mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.GONE);
         }
+        //如果内容不为空则将其子编辑框可见性置为可见，否则不可见
     }
 
+    /*
+     * 函数功能：检查模式和列表模式的切换
+     * 函数实现：如下注释
+     */
     public void onCheckListModeChanged(int oldMode, int newMode) {
         if (newMode == TextNote.MODE_CHECK_LIST) {
             switchToListMode(mNoteEditor.getText().toString());
+            //检查模式切换到列表模式
         } else {
             if (!getWorkingText()) {
                 mWorkingNote.setWorkingText(mWorkingNote.getContent().replace(TAG_UNCHECKED + " ",
                         ""));
             }
+            //若是获取到文本就改变其检查标记
             mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery));
             mEditTextList.setVisibility(View.GONE);
             mNoteEditor.setVisibility(View.VISIBLE);
+            //修改文本编辑器的内容和可见性
         }
     }
 
+    /*
+     * 函数功能：设置勾选选项表并返回是否勾选的标记
+     * 函数实现：如下注释
+     */
     private boolean getWorkingText() {
         boolean hasChecked = false;
+        //初始化check标记
         if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+        	// 若模式为CHECK_LIST
             StringBuilder sb = new StringBuilder();
+            //创建可变字符串
             for (int i = 0; i < mEditTextList.getChildCount(); i++) {
                 View view = mEditTextList.getChildAt(i);
+                //遍历所有子编辑框的视图 
                 NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
                 if (!TextUtils.isEmpty(edit.getText())) {
+                	//若文本不为空
                     if (((CheckBox) view.findViewById(R.id.cb_edit_item)).isChecked()) {
+                    	//该选项框已打钩
                         sb.append(TAG_CHECKED).append(" ").append(edit.getText()).append("\n");
                         hasChecked = true;
+                        //扩展字符串为已打钩并把标记置true
                     } else {
                         sb.append(TAG_UNCHECKED).append(" ").append(edit.getText()).append("\n");
+                        //扩展字符串添加未打钩
                     }
                 }
             }
             mWorkingNote.setWorkingText(sb.toString());
+            //利用编辑好的字符串设置运行便签的内容
         } else {
             mWorkingNote.setWorkingText(mNoteEditor.getText().toString());
+            // 若不是该模式直接用编辑器中的内容设置运行中标签的内容
         }
         return hasChecked;
     }
 
+    /*
+     * 函数功能：保存便签
+     * 函数实现：如下注释 
+     */
     private boolean saveNote() {
         getWorkingText();
         boolean saved = mWorkingNote.saveNote();
+        //运行 getWorkingText()之后保存
         if (saved) {
             /**
              * There are two modes from List view to edit view, open one note,
@@ -816,11 +1000,16 @@ public class NoteEditActivity extends Activity implements OnClickListener,
              * new node requires to the top of the list. This code
              * {@link #RESULT_OK} is used to identify the create/edit state
              */
+        	//如英文注释所说链接RESULT_OK是为了识别保存的2种情况，一是创建后保存，二是修改后保存
             setResult(RESULT_OK);
         }
         return saved;
     }
 
+    /*
+     * 函数功能：将便签发送至桌面
+     * 函数实现：如下注释 
+     */
     private void sendToDesktop() {
         /**
          * Before send message to home, we should make sure that current
@@ -829,12 +1018,16 @@ public class NoteEditActivity extends Activity implements OnClickListener,
          */
         if (!mWorkingNote.existInDatabase()) {
             saveNote();
+            //若不存在数据也就是新的标签就保存起来先
         }
 
         if (mWorkingNote.getNoteId() > 0) {
+        	//若是有内容
             Intent sender = new Intent();
             Intent shortcutIntent = new Intent(this, NoteEditActivity.class);
+            //建立发送到桌面的连接器
             shortcutIntent.setAction(Intent.ACTION_VIEW);
+            //链接为一个视图
             shortcutIntent.putExtra(Intent.EXTRA_UID, mWorkingNote.getNoteId());
             sender.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
             sender.putExtra(Intent.EXTRA_SHORTCUT_NAME,
@@ -842,9 +1035,12 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             sender.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
                     Intent.ShortcutIconResource.fromContext(this, R.drawable.icon_app));
             sender.putExtra("duplicate", true);
+            //将便签的相关信息都添加到要发送的文件里
             sender.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
+            //设置sneder的行为是发送
             showToast(R.string.info_note_enter_desktop);
             sendBroadcast(sender);
+            //显示到桌面
         } else {
             /**
              * There is the condition that user has input nothing (the note is
@@ -853,20 +1049,34 @@ public class NoteEditActivity extends Activity implements OnClickListener,
              */
             Log.e(TAG, "Send to desktop error");
             showToast(R.string.error_note_empty_for_send_to_desktop);
+            //空便签直接报错
         }
     }
 
+    /*
+     * 函数功能：编辑小图标的标题
+     * 函数实现：如下注释 
+     */
     private String makeShortcutIconTitle(String content) {
         content = content.replace(TAG_CHECKED, "");
         content = content.replace(TAG_UNCHECKED, "");
         return content.length() > SHORTCUT_ICON_TITLE_MAX_LEN ? content.substring(0,
                 SHORTCUT_ICON_TITLE_MAX_LEN) : content;
-    }
+        //直接设置为content中的内容并返回，有勾选和未勾选2种
+    } 
 
+    /*
+     * 函数功能：显示提示的视图
+     * 函数实现：根据下标显示对应的提示
+     */
     private void showToast(int resId) {
         showToast(resId, Toast.LENGTH_SHORT);
     }
 
+    /*
+     * 函数功能：持续显示提示的视图
+     * 函数实现：根据下标和持续的时间（duration）编辑提示视图并显示
+     */
     private void showToast(int resId, int duration) {
         Toast.makeText(this, resId, duration).show();
     }
diff --git a/src/net/micode/notes/ui/NoteEditText.java b/src/net/micode/notes/ui/NoteEditText.java
index 2afe2a8..9e0b18a 100644
--- a/src/net/micode/notes/ui/NoteEditText.java
+++ b/src/net/micode/notes/ui/NoteEditText.java
@@ -37,7 +37,8 @@ import net.micode.notes.R;
 import java.util.HashMap;
 import java.util.Map;
 
-public class NoteEditText extends EditText {
+//继承edittext，设置便签设置文本框
+public class NoteEditText extends EditText {  
     private static final String TAG = "NoteEditText";
     private int mIndex;
     private int mSelectionStartBeforeDelete;
@@ -45,7 +46,8 @@ public class NoteEditText extends EditText {
     private static final String SCHEME_TEL = "tel:" ;
     private static final String SCHEME_HTTP = "http:" ;
     private static final String SCHEME_EMAIL = "mailto:" ;
-
+    
+    ///建立一个字符和整数的hash表，用于链接电话，网站，还有邮箱
     private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
     static {
         sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
@@ -56,17 +58,20 @@ public class NoteEditText extends EditText {
     /**
      * Call by the {@link NoteEditActivity} to delete or add edit text
      */
+   //在NoteEditActivity中删除或添加文本的操作，可以看做是一个文本是否被变的标记，英文注释已说明的很清楚
     public interface OnTextViewChangeListener {
         /**
          * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
          * and the text is null
          */
+    	//处理删除按键时的操作
         void onEditTextDelete(int index, String text);
 
         /**
          * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
          * happen
          */
+        //处理进入按键时的操作
         void onEditTextEnter(int index, String text);
 
         /**
@@ -77,43 +82,56 @@ public class NoteEditText extends EditText {
 
     private OnTextViewChangeListener mOnTextViewChangeListener;
 
+    //根据context设置文本
     public NoteEditText(Context context) {
-        super(context, null);
+        super(context, null);//用super引用父类变量
         mIndex = 0;
     }
 
+    //设置当前光标
     public void setIndex(int index) {
         mIndex = index;
     }
-
+    
+    //初始化文本修改标记
     public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
         mOnTextViewChangeListener = listener;
     }
 
-    public NoteEditText(Context context, AttributeSet attrs) {
+    //AttributeSet 百度了一下是自定义空控件属性，用于维护便签动态变化的属性
+    //初始化便签
+    public NoteEditText(Context context, AttributeSet    attrs) {
         super(context, attrs, android.R.attr.editTextStyle);
     }
 
+    // 根据defstyle自动初始化
     public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
-        // TODO Auto-generated constructor stub
-    }
+        // TODO Auto-generated construct or stub
+    } 
 
     @Override
+    //view里的函数，处理手机屏幕的所有事件
+    /*参数event为手机屏幕触摸事件封装类的对象，其中封装了该事件的所有信息，
+                例如触摸的位置、触摸的类型以及触摸的时间等。该对象会在用户触摸手机屏幕时被创建。*/
     public boolean onTouchEvent(MotionEvent event) {
         switch (event.getAction()) {
+        //重写了需要处理屏幕被按下的事件
             case MotionEvent.ACTION_DOWN:
-
+            	//跟新当前坐标值
                 int x = (int) event.getX();
                 int y = (int) event.getY();
                 x -= getTotalPaddingLeft();
                 y -= getTotalPaddingTop();
                 x += getScrollX();
                 y += getScrollY();
-
+                
+                //用布局控件layout根据x,y的新值设置新的位置
                 Layout layout = getLayout();
                 int line = layout.getLineForVertical(y);
                 int off = layout.getOffsetForHorizontal(line, x);
+                
+                //更新光标新的位置
                 Selection.setSelection(getText(), off);
                 break;
         }
@@ -122,96 +140,147 @@ public class NoteEditText extends EditText {
     }
 
     @Override
+    /*
+     * 函数功能：处理用户按下一个键盘按键时会触发 的事件
+     * 实现过程：如下注释
+     */
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         switch (keyCode) {
+           //根据按键的 Unicode 编码值来处理
             case KeyEvent.KEYCODE_ENTER:
+            	//“进入”按键
                 if (mOnTextViewChangeListener != null) {
                     return false;
                 }
                 break;
             case KeyEvent.KEYCODE_DEL:
+            	//“删除”按键
                 mSelectionStartBeforeDelete = getSelectionStart();
                 break;
             default:
                 break;
         }
+      //继续执行父类的其他点击事件
         return super.onKeyDown(keyCode, event);
     }
 
     @Override
+    /*
+     * 函数功能：处理用户松开一个键盘按键时会触发 的事件
+     * 实现方式：如下注释
+     */
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         switch(keyCode) {
+        //根据按键的 Unicode 编码值来处理，有删除和进入2种操作
             case KeyEvent.KEYCODE_DEL:
                 if (mOnTextViewChangeListener != null) {
+                	//若是被修改过
                     if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
+                    	//若之前有被修改并且文档不为空
                         mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
+                        //利用上文OnTextViewChangeListener对KEYCODE_DEL按键情况的删除函数进行删除
                         return true;
                     }
                 } else {
                     Log.d(TAG, "OnTextViewChangeListener was not seted");
+                    //其他情况报错，文档的改动监听器并没有建立
                 }
                 break;
             case KeyEvent.KEYCODE_ENTER:
+            	//同上也是分为监听器是否建立2种情况
                 if (mOnTextViewChangeListener != null) {
                     int selectionStart = getSelectionStart();
+                    //获取当前位置
                     String text = getText().subSequence(selectionStart, length()).toString();
+                    //获取当前文本
                     setText(getText().subSequence(0, selectionStart));
+                    //根据获取的文本设置当前文本
                     mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
+                    //当{@link KeyEvent#KEYCODE_ENTER}添加新文本 
                 } else {
                     Log.d(TAG, "OnTextViewChangeListener was not seted");
+                  //其他情况报错，文档的改动监听器并没有建立
                 }
                 break;
             default:
                 break;
         }
+        //继续执行父类的其他按键弹起的事件
         return super.onKeyUp(keyCode, event);
     }
 
     @Override
+    /*
+     * 函数功能：当焦点发生变化时，会自动调用该方法来处理焦点改变的事件
+     * 实现方式：如下注释
+     * 参数：focused表示触发该事件的View是否获得了焦点，当该控件获得焦点时，Focused等于true，否则等于false。
+           direction表示焦点移动的方向，用数值表示
+           Rect：表示在触发事件的View的坐标系中，前一个获得焦点的矩形区域，即表示焦点是从哪里来的。如果不可用则为null
+     */
     protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
-        if (mOnTextViewChangeListener != null) {
+    	if (mOnTextViewChangeListener != null) {
+    		//若监听器已经建立
             if (!focused && TextUtils.isEmpty(getText())) {
+            	//获取到焦点并且文本不为空
                 mOnTextViewChangeListener.onTextChange(mIndex, false);
+                //mOnTextViewChangeListener子函数，置false隐藏事件选项
             } else {
                 mOnTextViewChangeListener.onTextChange(mIndex, true);
+              //mOnTextViewChangeListener子函数，置true显示事件选项
             }
         }
+    	//继续执行父类的其他焦点变化的事件
         super.onFocusChanged(focused, direction, previouslyFocusedRect);
     }
 
     @Override
+    /*
+     * 函数功能：生成上下文菜单
+     * 函数实现：如下注释
+     */
     protected void onCreateContextMenu(ContextMenu menu) {
         if (getText() instanceof Spanned) {
+        	//有文本存在
             int selStart = getSelectionStart();
             int selEnd = getSelectionEnd();
+            //获取文本开始和结尾位置
 
             int min = Math.min(selStart, selEnd);
             int max = Math.max(selStart, selEnd);
-
+            //获取开始到结尾的最大值和最小值
+            
             final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
+            //设置url的信息的范围值
             if (urls.length == 1) {
                 int defaultResId = 0;
                 for(String schema: sSchemaActionResMap.keySet()) {
+                	//获取计划表中所有的key值
                     if(urls[0].getURL().indexOf(schema) >= 0) {
+                    	//若url可以添加则在添加后将defaultResId置为key所映射的值
                         defaultResId = sSchemaActionResMap.get(schema);
                         break;
                     }
                 }
 
                 if (defaultResId == 0) {
+                	//defaultResId == 0则说明url并没有添加任何东西，所以置为连接其他SchemaActionResMap的值
                     defaultResId = R.string.note_link_other;
                 }
 
+                //建立菜单
                 menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
                         new OnMenuItemClickListener() {
+                        	//新建按键监听器
                             public boolean onMenuItemClick(MenuItem item) {
                                 // goto a new intent
                                 urls[0].onClick(NoteEditText.this);
+                                //根据相应的文本设置菜单的按键
                                 return true;
                             }
                         });
             }
         }
+      //继续执行父类的其他菜单创建的事件
         super.onCreateContextMenu(menu);
     }
-}
+}
\ No newline at end of file
diff --git a/src/net/micode/notes/ui/NoteItemData.java b/src/net/micode/notes/ui/NoteItemData.java
index 0f5a878..ad1de5e 100644
--- a/src/net/micode/notes/ui/NoteItemData.java
+++ b/src/net/micode/notes/ui/NoteItemData.java
@@ -41,7 +41,7 @@ public class NoteItemData {
         NoteColumns.WIDGET_ID,
         NoteColumns.WIDGET_TYPE,
     };
-
+    //常量标记和数据就不一一标记了，意义翻译基本就知道
     private static final int ID_COLUMN                    = 0;
     private static final int ALERTED_DATE_COLUMN          = 1;
     private static final int BG_COLOR_ID_COLUMN           = 2;
@@ -75,8 +75,9 @@ public class NoteItemData {
     private boolean mIsOnlyOneItem;
     private boolean mIsOneNoteFollowingFolder;
     private boolean mIsMultiNotesFollowingFolder;
-
-    public NoteItemData(Context context, Cursor cursor) {
+    //初始化NoteItemData，主要利用光标cursor获取的东西
+    public NoteItemData(Context context, Cursor  cursor) {
+    	//getxxx为转换格式
         mId = cursor.getLong(ID_COLUMN);
         mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
         mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
@@ -92,10 +93,11 @@ public class NoteItemData {
         mWidgetId = cursor.getInt(WIDGET_ID_COLUMN);
         mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN);
 
+        //初始化电话号码的信息
         mPhoneNumber = "";
         if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
             mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId);
-            if (!TextUtils.isEmpty(mPhoneNumber)) {
+            if (!TextUtils.isEmpty(mPhoneNumber)) {//mphonenumber里有符合字符串，则用contart功能连接
                 mName = Contact.getContact(context, mPhoneNumber);
                 if (mName == null) {
                     mName = mPhoneNumber;
@@ -108,32 +110,35 @@ public class NoteItemData {
         }
         checkPostion(cursor);
     }
-
+    ///根据鼠标的位置设置标记，和位置
     private void checkPostion(Cursor cursor) {
+    	//初始化几个标记，cursor具体功能笔记中已提到，不一一叙述
         mIsLastItem = cursor.isLast() ? true : false;
         mIsFirstItem = cursor.isFirst() ? true : false;
         mIsOnlyOneItem = (cursor.getCount() == 1);
+        //初始化“多重子文件”“单一子文件”2个标记
         mIsMultiNotesFollowingFolder = false;
         mIsOneNoteFollowingFolder = false;
 
-        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {
+        //主要是设置上诉2标记
+        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {//若是note格式并且不是第一个元素
             int position = cursor.getPosition();
-            if (cursor.moveToPrevious()) {
+            if (cursor.moveToPrevious()) {//获取光标位置后看上一行
                 if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
-                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {
+                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {//若光标满足系统或note格式
                     if (cursor.getCount() > (position + 1)) {
-                        mIsMultiNotesFollowingFolder = true;
+                        mIsMultiNotesFollowingFolder = true;//若是数据行数大于但前位置+1则设置成正确
                     } else {
-                        mIsOneNoteFollowingFolder = true;
+                        mIsOneNoteFollowingFolder = true;//否则单一文件夹标记为true
                     }
                 }
-                if (!cursor.moveToNext()) {
+                if (!cursor.moveToNext()) {//若不能再往下走则报错
                     throw new IllegalStateException("cursor move to previous but can't move back");
                 }
             }
         }
     }
-
+///以下都是获取标记没什么好说的，不过倒数第二个需要说明下，很具体看下面
     public boolean isOneFollowingFolder() {
         return mIsOneNoteFollowingFolder;
     }
@@ -214,6 +219,7 @@ public class NoteItemData {
         return (mAlertDate > 0);
     }
 
+    //若数据父id为保存至文件夹模式的id且满足电话号码单元不为空，则isCallRecord为true
     public boolean isCallRecord() {
         return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
     }
diff --git a/src/net/micode/notes/ui/NotesListActivity.java b/src/net/micode/notes/ui/NotesListActivity.java
index e843aec..8b8e430 100644
--- a/src/net/micode/notes/ui/NotesListActivity.java
+++ b/src/net/micode/notes/ui/NotesListActivity.java
@@ -77,8 +77,12 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.HashSet;
-
-public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+//主界面，一进入就是这个界面
+/**
+ * @author k
+ *
+ */
+public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {   //没有用特定的标签加注释。。。感觉没有什么用
     private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
 
     private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
@@ -89,7 +93,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     private static final int MENU_FOLDER_CHANGE_NAME = 2;
 
-    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
+    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";  //单行超过80个字符
 
     private enum ListEditState {
         NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
@@ -136,8 +140,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private final static int REQUEST_CODE_NEW_NODE  = 103;
 
     @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
+    // 创建类
+    protected void onCreate(final Bundle savedInstanceState) {  //需要是final类型   根据程序上下文环境，Java关键字final有“这是无法改变的”或者“终态的”含义，它可以修饰非抽象类、非抽象类成员方法和变量。你可能出于两种理解而需要阻止改变：设计或效率。
+        // final类不能被继承，没有子类，final类中的方法默认是final的。
+        //final方法不能被子类的方法覆盖，但可以被继承。
+        //final成员变量表示常量，只能被赋值一次，赋值后值不再改变。
+        //final不能用于修饰构造方法。
+        super.onCreate(savedInstanceState); // 调用父类的onCreate函数
         setContentView(R.layout.note_list);
         initResources();
 
@@ -148,26 +157,32 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     @Override
+    // 返回一些子模块完成的数据交给主Activity处理
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-        if (resultCode == RESULT_OK
+        // 结果值 和 要求值 符合要求 
+    	if (resultCode == RESULT_OK
                 && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
             mNotesListAdapter.changeCursor(null);
         } else {
             super.onActivityResult(requestCode, resultCode, data);
+            // 调用 Activity 的onActivityResult（）
         }
     }
 
     private void setAppInfoFromRawRes() {
+    	// Android平台给我们提供了一个SharedPreferences类，它是一个轻量级的存储类，特别适合用于保存软件配置参数。
         SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
         if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) {
             StringBuilder sb = new StringBuilder();
             InputStream in = null;
             try {
-                 in = getResources().openRawResource(R.raw.introduction);
+                // 把资源文件放到应用程序的/raw/raw下，那么就可以在应用中使用getResources获取资源后,
+            	// 以openRawResource方法（不带后缀的资源文件名）打开这个文件。 
+            	in = getResources().openRawResource(R.raw.introduction);
                 if (in != null) {
                     InputStreamReader isr = new InputStreamReader(in);
                     BufferedReader br = new BufferedReader(isr);
-                    char [] buf = new char[1024];
+                    char [] buf = new char[1024];  // 自行定义的数值，使用者不知道有什么意义
                     int len = 0;
                     while ((len = br.read(buf)) > 0) {
                         sb.append(buf, 0, len);
@@ -180,7 +195,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 e.printStackTrace();
                 return;
             } finally {
-                if(in != null) {
+                if (in != null) {
                     try {
                         in.close();
                     } catch (IOException e) {
@@ -189,12 +204,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     }
                 }
             }
-
+            
+            // 创建空的WorkingNote
             WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER,
                     AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE,
                     ResourceParser.RED);
             note.setWorkingText(sb.toString());
             if (note.saveNote()) {
+            	// 更新保存note的信息
                 sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit();
             } else {
                 Log.e(TAG, "Save introduction note error");
@@ -209,18 +226,21 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         startAsyncNotesListQuery();
     }
 
+    // 初始化资源
     private void initResources() {
-        mContentResolver = this.getContentResolver();
+        mContentResolver = this.getContentResolver(); // 获取应用程序的数据，得到类似数据表的东西
         mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
         mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-        mNotesListView = (ListView) findViewById(R.id.notes_list);
+        
+        // findViewById 是安卓编程的定位函数，主要是引用.R文件里的引用名
+        mNotesListView = (ListView) findViewById(R.id.notes_list); // 绑定XML中的ListView，作为Item的容器
         mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null),
                 null, false);
         mNotesListView.setOnItemClickListener(new OnListItemClickListener());
         mNotesListView.setOnItemLongClickListener(this);
         mNotesListAdapter = new NotesListAdapter(this);
         mNotesListView.setAdapter(mNotesListAdapter);
-        mAddNewNote = (Button) findViewById(R.id.btn_new_note);
+        mAddNewNote = (Button) findViewById(R.id.btn_new_note);// 在activity中要获取该按钮
         mAddNewNote.setOnClickListener(this);
         mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener());
         mDispatch = false;
@@ -231,6 +251,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         mModeCallBack = new ModeCallback();
     }
 
+    // 继承自ListView.MultiChoiceModeListener 和 OnMenuItemClickListener
     private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
         private DropdownMenu mDropDownMenu;
         private ActionMode mActionMode;
@@ -259,7 +280,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     (Button) customView.findViewById(R.id.selection_menu),
                     R.menu.note_list_dropdown);
             mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener(){
-                public boolean onMenuItemClick(MenuItem item) {
+                public boolean onMenuItemClick(final MenuItem item) {
                     mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected());
                     updateMenu();
                     return true;
@@ -269,11 +290,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             return true;
         }
 
+        // 更新菜单
         private void updateMenu() {
             int selectedCount = mNotesListAdapter.getSelectedCount();
             // Update dropdown menu
             String format = getResources().getString(R.string.menu_select_title, selectedCount);
-            mDropDownMenu.setTitle(format);
+            mDropDownMenu.setTitle(format); // 更改标题
             MenuItem item = mDropDownMenu.findItem(R.id.action_select_all);
             if (item != null) {
                 if (mNotesListAdapter.isAllSelected()) {
@@ -366,7 +388,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     /**
                      * HACKME:When click the transparent part of "New Note" button, dispatch
                      * the event to the list view behind this button. The transparent part of
-                     * "New Note" button could be expressed by formula y=-0.12x+94（Unit:pixel）
+                     * "New Note" button could be expressed by formula y=-0.12x+94锛圲nit:pixel锛�
                      * and the line top of the button. The coordinate based on left of the "New
                      * Note" button. The 94 represents maximum height of the transparent part.
                      * Notice that, if the background of the button changes, the formula should
@@ -664,9 +686,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         });
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onBackPressed()
+     * 按返回键时根据情况更改类中的数据
+     */
     @Override
-    public void onBackPressed() {
-        switch (mState) {
+    public void onBackPressed() { switch (mState) {
             case SUB_FOLDER:
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
                 mState = ListEditState.NOTE_LIST;
@@ -688,6 +713,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
     }
 
+    /**
+     * @param appWidgetId
+     * @param appWidgetType
+     * 根据不同类型的widget更新插件，通过intent传送数据
+     */
     private void updateWidget(int appWidgetId, int appWidgetType) {
         Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
         if (appWidgetType == Notes.TYPE_WIDGET_2X) {
@@ -707,6 +737,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         setResult(RESULT_OK, intent);
     }
 
+    /**
+     * 声明监听器，建立菜单，包括名称，视图，删除操作，更改名称操作；
+     */
     private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() {
         public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
             if (mFocusNoteDataItem != null) {
@@ -726,6 +759,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         super.onContextMenuClosed(menu);
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onContextItemSelected(android.view.MenuItem)
+     * 针对menu中不同的选择进行不同的处理，里面详细注释
+     */
     @Override
     public boolean onContextItemSelected(MenuItem item) {
         if (mFocusNoteDataItem == null) {
@@ -734,10 +771,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
         switch (item.getItemId()) {
             case MENU_FOLDER_VIEW:
-                openFolder(mFocusNoteDataItem);
+                openFolder(mFocusNoteDataItem);//打开对应文件
                 break;
             case MENU_FOLDER_DELETE:
-                AlertDialog.Builder builder = new AlertDialog.Builder(this);
+                AlertDialog.Builder builder = new AlertDialog.Builder(this);//设置确认是否删除的对话框
                 builder.setTitle(getString(R.string.alert_title_delete));
                 builder.setIcon(android.R.drawable.ic_dialog_alert);
                 builder.setMessage(getString(R.string.alert_message_delete_folder));
@@ -748,7 +785,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                             }
                         });
                 builder.setNegativeButton(android.R.string.cancel, null);
-                builder.show();
+                builder.show();//显示对话框
                 break;
             case MENU_FOLDER_CHANGE_NAME:
                 showCreateOrModifyFolderDialog(false);
@@ -818,12 +855,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         return true;
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onSearchRequested()
+     * 直接调用startSearch函数
+     */
     @Override
     public boolean onSearchRequested() {
         startSearch(null, false, null /* appData */, false);
         return true;
     }
 
+    /**
+     * 函数功能：实现将便签导出到文本功能
+     */
     private void exportNoteToText() {
         final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this);
         new AsyncTask<Void, Void, Integer>() {
@@ -866,16 +910,27 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }.execute();
     }
 
+    /**
+     * @return
+     * 功能：判断是否正在同步
+     */
     private boolean isSyncMode() {
         return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
     }
 
+    /**
+     * 功能：跳转到PreferenceActivity界面
+     */
     private void startPreferenceActivity() {
         Activity from = getParent() != null ? getParent() : this;
         Intent intent = new Intent(from, NotesPreferenceActivity.class);
         from.startActivityIfNeeded(intent, -1);
     }
 
+    /**
+     * @author k
+     * 函数功能：实现对便签列表项的点击事件（短按）
+     */
     private class OnListItemClickListener implements OnItemClickListener {
 
         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
@@ -917,6 +972,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     }
 
+    /**
+     * 查询目标文件
+     */
     private void startQueryDestinationFolders() {
         String selection = NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>? AND " + NoteColumns.ID + "<>?";
         selection = (mState == ListEditState.NOTE_LIST) ? selection:
@@ -935,6 +993,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 NoteColumns.MODIFIED_DATE + " DESC");
     }
 
+    /* (non-Javadoc)
+     * @see android.widget.AdapterView.OnItemLongClickListener#onItemLongClick(android.widget.AdapterView, android.view.View, int, long)
+     * 长按某一项时进行的操作
+     * 如果长按的是便签，则通过ActionMode菜单实现；如果长按的是文件夹，则通过ContextMenu菜单实现；
+     *        具体ActionMOde菜单和ContextMenu菜单的详细见精度笔记
+     */
     public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
         if (view instanceof NotesListItem) {
             mFocusNoteDataItem = ((NotesListItem) view).getItemData();
diff --git a/src/net/micode/notes/ui/NotesListAdapter.java b/src/net/micode/notes/ui/NotesListAdapter.java
index 51c9cb9..e8d9898 100644
--- a/src/net/micode/notes/ui/NotesListAdapter.java
+++ b/src/net/micode/notes/ui/NotesListAdapter.java
@@ -1,3 +1,4 @@
+
 /*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
@@ -19,10 +20,11 @@ package net.micode.notes.ui;
 import android.content.Context;
 import android.database.Cursor;
 import android.util.Log;
-import android.view.View;
+import android.view.View; 
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 
+
 import net.micode.notes.data.Notes;
 
 import java.util.Collection;
@@ -31,55 +33,94 @@ import java.util.HashSet;
 import java.util.Iterator;
 
 
+/*
+ * 功能：直译为便签表连接器，继承了CursorAdapter，它为cursor和ListView提供了连接的桥梁。
+ *     所以NotesListAdapter实现的是鼠标和编辑便签链接的桥梁
+ */
 public class NotesListAdapter extends CursorAdapter {
     private static final String TAG = "NotesListAdapter";
     private Context mContext;
     private HashMap<Integer, Boolean> mSelectedIndex;
-    private int mNotesCount;
-    private boolean mChoiceMode;
+    private int mNotesCount;    //便签数
+    private boolean mChoiceMode;   //选择模式标记
 
+    /*
+     * 桌面widget的属性，包括编号和类型
+     */
     public static class AppWidgetAttribute {
         public int widgetId;
         public int widgetType;
     };
 
+    /*
+     * 函数功能：初始化便签链接器
+     * 函数实现：根据传进来的内容设置相关变量
+     */
     public NotesListAdapter(Context context) {
-        super(context, null);
-        mSelectedIndex = new HashMap<Integer, Boolean>();
+        super(context, null);  //父类对象置空
+        mSelectedIndex = new HashMap<Integer, Boolean>();  //新建选项下标的hash表
         mContext = context;
         mNotesCount = 0;
     }
 
     @Override
+    /*
+     * 函数功能：新建一个视图来存储光标所指向的数据
+     * 函数实现：使用兄弟类NotesListItem新建一个项目选项
+     */
     public View newView(Context context, Cursor cursor, ViewGroup parent) {
         return new NotesListItem(context);
     }
 
+    /*
+     * 函数功能：将已经存在的视图和鼠标指向的数据进行捆绑
+     * 函数实现：如下注释
+     */
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
         if (view instanceof NotesListItem) {
+        	//若view是NotesListItem的一个实例
             NoteItemData itemData = new NoteItemData(context, cursor);
             ((NotesListItem) view).bind(context, itemData, mChoiceMode,
                     isSelectedItem(cursor.getPosition()));
+           //则新建一个项目选项并且用bind跟将view和鼠标，内容，便签数据捆绑在一起
         }
     }
 
+    /*
+     * 函数功能：设置勾选框
+     * 函数实现：如下注释
+     */
     public void setCheckedItem(final int position, final boolean checked) {
         mSelectedIndex.put(position, checked);
+        //根据定位和是否勾选设置下标
         notifyDataSetChanged();
+        //在修改后刷新activity
     }
 
+    /*
+     * 函数功能：判断单选按钮是否勾选
+     */
     public boolean isInChoiceMode() {
         return mChoiceMode;
     }
 
+    /*
+     * 函数功能：设置单项选项框
+     * 函数实现：重置下标并且根据参数mode设置选项
+     */
     public void setChoiceMode(boolean mode) {
         mSelectedIndex.clear();
         mChoiceMode = mode;
     }
 
+    /*
+     * 函数功能：选择全部选项
+     * 函数实现：如下注释
+     */
     public void selectAll(boolean checked) {
         Cursor cursor = getCursor();
+        //获取光标位置
         for (int i = 0; i < getCount(); i++) {
             if (cursor.moveToPosition(i)) {
                 if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) {
@@ -87,30 +128,47 @@ public class NotesListAdapter extends CursorAdapter {
                 }
             }
         }
+        //遍历所有光标可用的位置在判断为便签类型之后勾选单项框
     }
 
+    /*
+     * 函数功能：建立选择项的下标列表
+     * 函数实现：如下注释
+     */
     public HashSet<Long> getSelectedItemIds() {
         HashSet<Long> itemSet = new HashSet<Long>();
+        //建立hash表
         for (Integer position : mSelectedIndex.keySet()) {
+        	//遍历所有的关键
             if (mSelectedIndex.get(position) == true) {
+            	//若光标位置可用
                 Long id = getItemId(position);
                 if (id == Notes.ID_ROOT_FOLDER) {
+                	//原文件不需要添加
                     Log.d(TAG, "Wrong item id, should not happen");
                 } else {
                     itemSet.add(id);
                 }
+                //则将id该下标假如选项集合中
+                
             }
         }
 
         return itemSet;
     }
 
+    /*
+     * 函数功能：建立桌面Widget的选项表
+     * 函数实现：如下注释
+     */
     public HashSet<AppWidgetAttribute> getSelectedWidget() {
         HashSet<AppWidgetAttribute> itemSet = new HashSet<AppWidgetAttribute>();
         for (Integer position : mSelectedIndex.keySet()) {
             if (mSelectedIndex.get(position) == true) {
                 Cursor c = (Cursor) getItem(position);
+                //以上4句和getSelectedItemIds一样，不再重复
                 if (c != null) {
+                	//光标位置可用的话就建立新的Widget属性并编辑下标和类型，最后添加到选项集中
                     AppWidgetAttribute widget = new AppWidgetAttribute();
                     NoteItemData item = new NoteItemData(mContext, c);
                     widget.widgetId = item.getWidgetId();
@@ -128,26 +186,42 @@ public class NotesListAdapter extends CursorAdapter {
         return itemSet;
     }
 
+    /*
+     * 函数功能：获取选项个数
+     * 函数实现：如下注释
+     */
     public int getSelectedCount() {
         Collection<Boolean> values = mSelectedIndex.values();
+        //首先获取选项下标的值
         if (null == values) {
             return 0;
         }
         Iterator<Boolean> iter = values.iterator();
+        //初始化叠加器
         int count = 0;
         while (iter.hasNext()) {
             if (true == iter.next()) {
+            	//若value值为真计数+1
                 count++;
             }
         }
         return count;
     }
 
+    /*
+     * 函数功能：判断是否全部选中
+     * 函数实现：如下注释
+     */
     public boolean isAllSelected() {
         int checkedCount = getSelectedCount();
         return (checkedCount != 0 && checkedCount == mNotesCount);
+        //获取选项数看是否等于便签的个数
     }
 
+    /*
+     * 函数功能：判断是否为选项表
+     * 函数实现：通过传递的下标来确定
+     */
     public boolean isSelectedItem(final int position) {
         if (null == mSelectedIndex.get(position)) {
             return false;
@@ -156,29 +230,45 @@ public class NotesListAdapter extends CursorAdapter {
     }
 
     @Override
+    /*
+     * 函数功能：在activity内容发生局部变动的时候回调该函数计算便签的数量
+     * 函数实现：如下注释
+     */
     protected void onContentChanged() {
         super.onContentChanged();
+        //执行基类函数
         calcNotesCount();
     }
 
     @Override
+    /*
+     * 函数功能：在activity光标发生局部变动的时候回调该函数计算便签的数量
+     */
     public void changeCursor(Cursor cursor) {
         super.changeCursor(cursor);
+      //执行基类函数
         calcNotesCount();
     }
 
+    /*
+     * 函数功能：计算便签数量
+     * 
+     */
     private void calcNotesCount() {
         mNotesCount = 0;
         for (int i = 0; i < getCount(); i++) {
+        	//获取总数同时遍历
             Cursor c = (Cursor) getItem(i);
             if (c != null) {
                 if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) {
                     mNotesCount++;
+                   //若该位置不为空并且文本类型为便签就+1
                 }
             } else {
                 Log.e(TAG, "Invalid cursor");
                 return;
             }
+            //否则报错
         }
-    }
+    } 
 }
diff --git a/src/net/micode/notes/ui/NotesListItem.java b/src/net/micode/notes/ui/NotesListItem.java
index 1221e80..e5af6ce 100644
--- a/src/net/micode/notes/ui/NotesListItem.java
+++ b/src/net/micode/notes/ui/NotesListItem.java
@@ -30,37 +30,43 @@ import net.micode.notes.tool.DataUtils;
 import net.micode.notes.tool.ResourceParser.NoteItemBgResources;
 
 
+//创建便签列表项目选项
 public class NotesListItem extends LinearLayout {
-    private ImageView mAlert;
-    private TextView mTitle;
-    private TextView mTime;
-    private TextView mCallName;
-    private NoteItemData mItemData;
-    private CheckBox mCheckBox;
+    private ImageView mAlert;//闹钟图片
+    private TextView mTitle;  //标题
+    private TextView mTime;   //时间
+    private TextView mCallName;    //
+    private NoteItemData mItemData; //标签数据
+    private CheckBox mCheckBox;    //打钩框
 
+    /*初始化基本信息*/
     public NotesListItem(Context context) {
-        super(context);
-        inflate(context, R.layout.note_item, this);
+        super(context);   //super()它的主要作用是调整调用父类构造函数的顺序
+        inflate(context, R.layout.note_item, this);//Inflate可用于将一个xml中定义的布局控件找出来,这里的xml是r。layout
+        //findViewById用于从contentView中查找指定ID的View，转换出来的形式根据需要而定;
         mAlert = (ImageView) findViewById(R.id.iv_alert_icon);
         mTitle = (TextView) findViewById(R.id.tv_title);
         mTime = (TextView) findViewById(R.id.tv_time);
         mCallName = (TextView) findViewById(R.id.tv_name);
         mCheckBox = (CheckBox) findViewById(android.R.id.checkbox);
     }
-
+  ///根据data的属性对各个控件的属性的控制，主要是可见性Visibility，内容setText，格式setTextAppearance
     public void bind(Context context, NoteItemData data, boolean choiceMode, boolean checked) {
         if (choiceMode && data.getType() == Notes.TYPE_NOTE) {
-            mCheckBox.setVisibility(View.VISIBLE);
-            mCheckBox.setChecked(checked);
+            mCheckBox.setVisibility(View.VISIBLE);  ///设置可见行为可见
+            mCheckBox.setChecked(checked);         ///格子打钩
         } else {
             mCheckBox.setVisibility(View.GONE);
         }
 
         mItemData = data;
+        ///设置控件属性，一共三种情况，由data的id和父id是否与保存到文件夹的id一致来决定
         if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
             mCallName.setVisibility(View.GONE);
             mAlert.setVisibility(View.VISIBLE);
+            //设置该textview的style
             mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+            //settext为设置内容
             mTitle.setText(context.getString(R.string.call_record_folder_name)
                     + context.getString(R.string.format_folder_files_count, data.getNotesCount()));
             mAlert.setImageResource(R.drawable.call_record);
@@ -69,8 +75,9 @@ public class NotesListItem extends LinearLayout {
             mCallName.setText(data.getCallName());
             mTitle.setTextAppearance(context,R.style.TextAppearanceSecondaryItem);
             mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
+            ///关于闹钟的设置
             if (data.hasAlert()) {
-                mAlert.setImageResource(R.drawable.clock);
+                mAlert.setImageResource(R.drawable.clock);//图片来源的设置
                 mAlert.setVisibility(View.VISIBLE);
             } else {
                 mAlert.setVisibility(View.GONE);
@@ -78,7 +85,7 @@ public class NotesListItem extends LinearLayout {
         } else {
             mCallName.setVisibility(View.GONE);
             mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
-
+            ///设置title格式
             if (data.getType() == Notes.TYPE_FOLDER) {
                 mTitle.setText(data.getSnippet()
                         + context.getString(R.string.format_folder_files_count,
@@ -87,35 +94,38 @@ public class NotesListItem extends LinearLayout {
             } else {
                 mTitle.setText(DataUtils.getFormattedSnippet(data.getSnippet()));
                 if (data.hasAlert()) {
-                    mAlert.setImageResource(R.drawable.clock);
+                    mAlert.setImageResource(R.drawable.clock);///设置图片来源
                     mAlert.setVisibility(View.VISIBLE);
                 } else {
                     mAlert.setVisibility(View.GONE);
                 }
             }
         }
-        mTime.setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate()));
-
+        ///设置内容，获取相关时间，从data里编辑的日期中获取
+        mTime. setText(DateUtils.getRelativeTimeSpanString(data.getModifiedDate()));
+       
         setBackground(data);
     }
-
+    //根据data的文件属性来设置背景
     private void setBackground(NoteItemData data) {
         int id = data.getBgColorId();
+        //，若是note型文件，则4种情况，对于4种不同情况的背景来源
         if (data.getType() == Notes.TYPE_NOTE) {
+        	//单个数据并且只有一个子文件夹
             if (data.isSingle() || data.isOneFollowingFolder()) {
                 setBackgroundResource(NoteItemBgResources.getNoteBgSingleRes(id));
-            } else if (data.isLast()) {
+            } else if (data.isLast()) {//是最后一个数据
                 setBackgroundResource(NoteItemBgResources.getNoteBgLastRes(id));
-            } else if (data.isFirst() || data.isMultiFollowingFolder()) {
+            } else if (data.isFirst() || data.isMultiFollowingFolder()) {//是一个数据并有多个子文件夹
                 setBackgroundResource(NoteItemBgResources.getNoteBgFirstRes(id));
             } else {
                 setBackgroundResource(NoteItemBgResources.getNoteBgNormalRes(id));
             }
         } else {
+        	//若不是note直接调用文件夹的背景来源
             setBackgroundResource(NoteItemBgResources.getFolderBgRes());
         }
     }
-
     public NoteItemData getItemData() {
         return mItemData;
     }
diff --git a/src/net/micode/notes/ui/NotesPreferenceActivity.java b/src/net/micode/notes/ui/NotesPreferenceActivity.java
index 07c5f7e..9d16a24 100644
--- a/src/net/micode/notes/ui/NotesPreferenceActivity.java
+++ b/src/net/micode/notes/ui/NotesPreferenceActivity.java
@@ -47,66 +47,92 @@ import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.gtask.remote.GTaskSyncService;
 
-
+/*
+ *该类功能：NotesPreferenceActivity，在小米便签中主要实现的是对背景颜色和字体大小的数据储存。
+ *       继承了PreferenceActivity主要功能为对系统信息和配置进行自动保存的Activity
+ */
 public class NotesPreferenceActivity extends PreferenceActivity {
     public static final String PREFERENCE_NAME = "notes_preferences";
-
+                              //优先名 
     public static final String PREFERENCE_SYNC_ACCOUNT_NAME = "pref_key_account_name";
-
+                              //同步账号
     public static final String PREFERENCE_LAST_SYNC_TIME = "pref_last_sync_time";
-
+                               //同步时间
     public static final String PREFERENCE_SET_BG_COLOR_KEY = "pref_key_bg_random_appear";
 
     private static final String PREFERENCE_SYNC_ACCOUNT_KEY = "pref_sync_account_key";
-
+                               //同步密码
     private static final String AUTHORITIES_FILTER_KEY = "authorities";
-
+                               //本地密码
     private PreferenceCategory mAccountCategory;
-
+                                 //账户分组
     private GTaskReceiver mReceiver;
-
+                              //同步任务接收器
     private Account[] mOriAccounts;
-
+                              //账户
     private boolean mHasAddedAccount;
+                             //账户的hash标记
 
     @Override
+    /*
+     *函数功能：创建一个activity，在函数里要完成所有的正常静态设置
+     *参数：Bundle icicle：存放了 activity 当前的状态
+     *函数实现：如下注释
+     */
     protected void onCreate(Bundle icicle) {
+    	//先执行父类的创建函数
         super.onCreate(icicle);
-
+        
         /* using the app icon for navigation */
         getActionBar().setDisplayHomeAsUpEnabled(true);
+        //给左上角图标的左边加上一个返回的图标 
 
         addPreferencesFromResource(R.xml.preferences);
+        //添加xml来源并显示 xml
         mAccountCategory = (PreferenceCategory) findPreference(PREFERENCE_SYNC_ACCOUNT_KEY);
+        //根据同步账户关键码来初始化分组
         mReceiver = new GTaskReceiver();
         IntentFilter filter = new IntentFilter();
         filter.addAction(GTaskSyncService.GTASK_SERVICE_BROADCAST_NAME);
         registerReceiver(mReceiver, filter);
+        //初始化同步组件
 
         mOriAccounts = null;
         View header = LayoutInflater.from(this).inflate(R.layout.settings_header, null);
+        //获取listvivew，ListView的作用:用于列出所有选择 
         getListView().addHeaderView(header, null, true);
+        //在listview组件上方添加其他组件
     }
 
     @Override
+    /*
+     * 函数功能：activity交互功能的实现，用于接受用户的输入
+     * 函数实现：如下注释
+     */
     protected void onResume() {
+    	//先执行父类 的交互实现
         super.onResume();
 
         // need to set sync account automatically if user has added a new
         // account
         if (mHasAddedAccount) {
+        	//若用户新加了账户则自动设置同步账户
             Account[] accounts = getGoogleAccounts();
+            //获取google同步账户
             if (mOriAccounts != null && accounts.length > mOriAccounts.length) {
-                for (Account accountNew : accounts) {
+                //若原账户不为空且当前账户有增加
+            	for (Account accountNew : accounts) {
                     boolean found = false;
                     for (Account accountOld : mOriAccounts) {
                         if (TextUtils.equals(accountOld.name, accountNew.name)) {
+                        	//更新账户
                             found = true;
                             break;
                         }
                     }
                     if (!found) {
                         setSyncAccount(accountNew.name);
+                        //若是没有找到旧的账户，那么同步账号中就只添加新账户
                         break;
                     }
                 }
@@ -114,35 +140,52 @@ public class NotesPreferenceActivity extends PreferenceActivity {
         }
 
         refreshUI();
+        //刷新标签界面
     }
 
     @Override
+    /*
+     * 函数功能：销毁一个activity
+     * 函数实现：如下注释
+     */
     protected void onDestroy() {
         if (mReceiver != null) {
             unregisterReceiver(mReceiver);
+            //注销接收器
         }
         super.onDestroy();
+        //执行父类的销毁动作
     }
 
+    /*
+     * 函数功能：重新设置账户信息
+     * 函数实现：如下注释
+     */
     private void loadAccountPreference() {
         mAccountCategory.removeAll();
-
+        //销毁所有的分组
         Preference accountPref = new Preference(this);
+        //建立首选项
         final String defaultAccount = getSyncAccountName(this);
         accountPref.setTitle(getString(R.string.preferences_account_title));
         accountPref.setSummary(getString(R.string.preferences_account_summary));
+        //设置首选项的大标题和小标题
         accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
             public boolean onPreferenceClick(Preference preference) {
+            	//建立监听器
                 if (!GTaskSyncService.isSyncing()) {
                     if (TextUtils.isEmpty(defaultAccount)) {
                         // the first time to set account
+                    	//若是第一次建立账户显示选择账户提示对话框
                         showSelectAccountAlertDialog();
                     } else {
                         // if the account has already been set, we need to promp
                         // user about the risk
+                    	//若是已经建立则显示修改对话框并进行修改操作
                         showChangeAccountConfirmAlertDialog();
                     }
                 } else {
+                	//若在没有同步的情况下，则在toast中显示不能修改
                     Toast.makeText(NotesPreferenceActivity.this,
                             R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
                             .show();
@@ -151,21 +194,29 @@ public class NotesPreferenceActivity extends PreferenceActivity {
             }
         });
 
+        //根据新建首选项编辑新的账户分组
         mAccountCategory.addPreference(accountPref);
     }
 
+    /*
+     *函数功能：设置按键的状态和最后同步的时间
+     *函数实现：如下注释 
+     */
     private void loadSyncButton() {
         Button syncButton = (Button) findViewById(R.id.preference_sync_button);
         TextView lastSyncTimeView = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
-
+        //获取同步按钮控件和最终同步时间的的窗口
         // set button state
+        //设置按钮的状态
         if (GTaskSyncService.isSyncing()) {
+        	//若是在同步状态下
             syncButton.setText(getString(R.string.preferences_button_sync_cancel));
             syncButton.setOnClickListener(new View.OnClickListener() {
                 public void onClick(View v) {
                     GTaskSyncService.cancelSync(NotesPreferenceActivity.this);
                 }
             });
+            //设置按钮显示的文本为“取消同步”以及监听器
         } else {
             syncButton.setText(getString(R.string.preferences_button_sync_immediately));
             syncButton.setOnClickListener(new View.OnClickListener() {
@@ -173,50 +224,67 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                     GTaskSyncService.startSync(NotesPreferenceActivity.this);
                 }
             });
+          //若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器
         }
         syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
+        //设置按键可用还是不可用
 
         // set last sync time
+        // 设置最终同步时间
         if (GTaskSyncService.isSyncing()) {
+        	//若是在同步的情况下
             lastSyncTimeView.setText(GTaskSyncService.getProgressString());
             lastSyncTimeView.setVisibility(View.VISIBLE);
+            // 根据当前同步服务器设置时间显示框的文本以及可见性
         } else {
+        	//若是非同步情况
             long lastSyncTime = getLastSyncTime(this);
             if (lastSyncTime != 0) {
                 lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
                         DateFormat.format(getString(R.string.preferences_last_sync_time_format),
                                 lastSyncTime)));
                 lastSyncTimeView.setVisibility(View.VISIBLE);
+                //则根据最后同步时间的信息来编辑时间显示框的文本内容和可见性
             } else {
+            	 //若时间为空直接设置为不可见状态
                 lastSyncTimeView.setVisibility(View.GONE);
             }
         }
     }
-
+     /*
+      *函数功能：刷新标签界面
+      *函数实现：调用上文设置账号和设置按键两个函数来实现 
+      */
     private void refreshUI() {
         loadAccountPreference();
         loadSyncButton();
     }
 
+    /*
+     * 函数功能：显示账户选择的对话框并进行账户的设置
+     * 函数实现：如下注释
+     */
     private void showSelectAccountAlertDialog() {
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+        //创建一个新的对话框
 
         View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
         TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
         titleTextView.setText(getString(R.string.preferences_dialog_select_account_title));
         TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
         subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips));
-
+        //设置标题以及子标题的内容
         dialogBuilder.setCustomTitle(titleView);
         dialogBuilder.setPositiveButton(null, null);
-
+        //设置对话框的自定义标题，建立一个YES的按钮
         Account[] accounts = getGoogleAccounts();
         String defAccount = getSyncAccountName(this);
-
+        //获取同步账户信息
         mOriAccounts = accounts;
         mHasAddedAccount = false;
 
         if (accounts.length > 0) {
+        	//若账户不为空
             CharSequence[] items = new CharSequence[accounts.length];
             final CharSequence[] itemMapping = items;
             int checkedItem = -1;
@@ -224,83 +292,119 @@ public class NotesPreferenceActivity extends PreferenceActivity {
             for (Account account : accounts) {
                 if (TextUtils.equals(account.name, defAccount)) {
                     checkedItem = index;
+                    //在账户列表中查询到所需账户
                 }
                 items[index++] = account.name;
             }
             dialogBuilder.setSingleChoiceItems(items, checkedItem,
+            		//在对话框建立一个单选的复选框
                     new DialogInterface.OnClickListener() {
                         public void onClick(DialogInterface dialog, int which) {
                             setSyncAccount(itemMapping[which].toString());
                             dialog.dismiss();
+                            //取消对话框
                             refreshUI();
                         }
+                        //设置点击后执行的事件，包括检录新同步账户和刷新标签界面
                     });
+            //建立对话框网络版的监听器
         }
 
         View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
         dialogBuilder.setView(addAccountView);
+        //给新加账户对话框设置自定义样式
 
         final AlertDialog dialog = dialogBuilder.show();
+        //显示对话框
         addAccountView.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 mHasAddedAccount = true;
+                //将新加账户的hash置true
                 Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
+                //建立网络建立组件
                 intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
                     "gmail-ls"
                 });
                 startActivityForResult(intent, -1);
+                //跳回上一个选项
                 dialog.dismiss();
             }
         });
+        //建立新加账户对话框的监听器
     }
 
+    /*
+     * 函数功能：显示账户选择对话框和相关账户操作
+     * 函数实现：如下注释
+     */
     private void showChangeAccountConfirmAlertDialog() {
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
-
+        //创建一个新的对话框
         View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
         TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
         titleTextView.setText(getString(R.string.preferences_dialog_change_account_title,
                 getSyncAccountName(this)));
         TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
         subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
+        //根据同步修改的账户信息设置标题以及子标题的内容
         dialogBuilder.setCustomTitle(titleView);
-
+      //设置对话框的自定义标题
         CharSequence[] menuItemArray = new CharSequence[] {
                 getString(R.string.preferences_menu_change_account),
                 getString(R.string.preferences_menu_remove_account),
                 getString(R.string.preferences_menu_cancel)
         };
+        //定义一些标记字符串
         dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
+        	//设置对话框要显示的一个list，用于显示几个命令时,即change，remove，cancel
             public void onClick(DialogInterface dialog, int which) {
+            	//按键功能，由which来决定
                 if (which == 0) {
+                	//进入账户选择对话框
                     showSelectAccountAlertDialog();
                 } else if (which == 1) {
+                	//删除账户并且跟新便签界面
                     removeSyncAccount();
                     refreshUI();
                 }
             }
         });
         dialogBuilder.show();
+        //显示对话框
     }
 
+    /*
+     *函数功能：获取谷歌账户
+     *函数实现：通过账户管理器直接获取
+     */
     private Account[] getGoogleAccounts() {
         AccountManager accountManager = AccountManager.get(this);
         return accountManager.getAccountsByType("com.google");
     }
 
+    /*
+     * 函数功能：设置同步账户
+     * 函数实现：如下注释：
+     */
     private void setSyncAccount(String account) {
         if (!getSyncAccountName(this).equals(account)) {
+        	//假如该账号不在同步账号列表中
             SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
             SharedPreferences.Editor editor = settings.edit();
+            //编辑共享的首选项
             if (account != null) {
                 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
             } else {
                 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
             }
+            //将该账号加入到首选项中
+            
             editor.commit();
+            //提交修改的数据
 
-            // clean up last sync time
+            
             setLastSyncTime(this, 0);
+          //将最后同步时间清零
 
             // clean up local gtask related info
             new Thread(new Runnable() {
@@ -311,24 +415,34 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                     getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
                 }
             }).start();
+            //重置当地同步任务的信息
 
             Toast.makeText(NotesPreferenceActivity.this,
                     getString(R.string.preferences_toast_success_set_accout, account),
                     Toast.LENGTH_SHORT).show();
+            //将toast的文本信息置为“设置账户成功”并显示出来
         }
     }
-
+    /*
+     * 函数功能：删除同步账户
+     * 函数实现：如下注释：
+     */
     private void removeSyncAccount() {
         SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
         SharedPreferences.Editor editor = settings.edit();
+        //设置共享首选项
+        
         if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
             editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
+            //假如当前首选项中有账户就删除
         }
         if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
             editor.remove(PREFERENCE_LAST_SYNC_TIME);
+            //删除当前首选项中有账户时间
         }
         editor.commit();
-
+        //提交更新后的数据
+        
         // clean up local gtask related info
         new Thread(new Runnable() {
             public void run() {
@@ -338,51 +452,79 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                 getContentResolver().update(Notes.CONTENT_NOTE_URI, values, null, null);
             }
         }).start();
+      //重置当地同步任务的信息
     }
-
+    
+    /*
+     * 函数功能：获取同步账户名称
+     * 函数实现：通过共享的首选项里的信息直接获取
+     */
     public static String getSyncAccountName(Context context) {
         SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
                 Context.MODE_PRIVATE);
         return settings.getString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
     }
 
+    /*
+     * 函数功能：设置最终同步的时间
+     * 函数实现：如下注释
+     */
     public static void setLastSyncTime(Context context, long time) {
         SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
                 Context.MODE_PRIVATE);
         SharedPreferences.Editor editor = settings.edit();
+        // 从共享首选项中找到相关账户并获取其编辑器
         editor.putLong(PREFERENCE_LAST_SYNC_TIME, time);
         editor.commit();
+        //编辑最终同步时间并提交更新
     }
-
+    /*
+     * 函数功能：获取最终同步时间
+     * 函数实现：通过共享的首选项里的信息直接获取
+     */
     public static long getLastSyncTime(Context context) {
         SharedPreferences settings = context.getSharedPreferences(PREFERENCE_NAME,
                 Context.MODE_PRIVATE);
         return settings.getLong(PREFERENCE_LAST_SYNC_TIME, 0);
     }
 
+    /*
+     * 函数功能：接受同步信息
+     * 函数实现：继承BroadcastReceiver
+     */
     private class GTaskReceiver extends BroadcastReceiver {
 
         @Override
         public void onReceive(Context context, Intent intent) {
             refreshUI();
             if (intent.getBooleanExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_IS_SYNCING, false)) {
-                TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
+                //获取随广播而来的Intent中的同步服务的数据
+            	TextView syncStatus = (TextView) findViewById(R.id.prefenerece_sync_status_textview);
                 syncStatus.setText(intent
                         .getStringExtra(GTaskSyncService.GTASK_SERVICE_BROADCAST_PROGRESS_MSG));
+                //通过获取的数据在设置系统的状态
             }
 
         }
     }
 
+    /*
+     * 函数功能：处理菜单的选项
+     * 函数实现：如下注释
+     * 参数:MenuItem菜单选项
+     */
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
+        //根据选项的id选择，这里只有一个主页
             case android.R.id.home:
                 Intent intent = new Intent(this, NotesListActivity.class);
                 intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                 startActivity(intent);
                 return true;
+                //在主页情况下在创建连接组件intent，发出清空的信号并开始一个相应的activity
             default:
                 return false;
         }
     }
 }
+
diff --git a/src/net/micode/notes/widget/NoteWidgetProvider_4x.java b/src/net/micode/notes/widget/NoteWidgetProvider_4x.java
index c12a02e..e11aaec 100644
--- a/src/net/micode/notes/widget/NoteWidgetProvider_4x.java
+++ b/src/net/micode/notes/widget/NoteWidgetProvider_4x.java
@@ -1,4 +1,4 @@
-/*
+ /*
  * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");