diff --git a/doc/ReadMe.txt b/doc/ReadMe.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/doc/小米便签开源代码的泛读报告.docx b/doc/小米便签开源代码的泛读报告.docx
new file mode 100644
index 0000000..46eab7e
Binary files /dev/null and b/doc/小米便签开源代码的泛读报告.docx differ
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java
index d97ac5d..6083afa 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java
@@ -14,60 +14,72 @@
  * limitations under the License.
  */
 
-package net.micode.notes.data;
-
-import android.content.Context;
-import android.database.Cursor;
-import android.provider.ContactsContract.CommonDataKinds.Phone;
-import android.provider.ContactsContract.Data;
-import android.telephony.PhoneNumberUtils;
-import android.util.Log;
-
-import java.util.HashMap;
-
-public class Contact {
-    private static HashMap<String, String> sContactCache;
-    private static final String TAG = "Contact";
-
-    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 = '+')";
-
-    public static String getContact(Context context, String phoneNumber) {
-        if(sContactCache == null) {
-            sContactCache = new HashMap<String, String>();
-        }
-
-        if(sContactCache.containsKey(phoneNumber)) {
-            return sContactCache.get(phoneNumber);
-        }
-
-        String selection = CALLER_ID_SELECTION.replace("+",
-                PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
-        Cursor cursor = context.getContentResolver().query(
-                Data.CONTENT_URI,
-                new String [] { Phone.DISPLAY_NAME },
-                selection,
-                new String[] { phoneNumber },
-                null);
-
-        if (cursor != null && cursor.moveToFirst()) {
-            try {
-                String name = cursor.getString(0);
-                sContactCache.put(phoneNumber, name);
-                return name;
-            } catch (IndexOutOfBoundsException e) {
-                Log.e(TAG, " Cursor get string error " + e.toString());
-                return null;
-            } finally {
-                cursor.close();
-            }
-        } else {
-            Log.d(TAG, "No contact matched with number:" + phoneNumber);
-            return null;
-        }
-    }
-}
+ package net.micode.notes.data;
+ 
+ import android.content.Context;
+  
+ import android.database.Cursor;
+ import android.provider.ContactsContract.CommonDataKinds.Phone;
+ import android.provider.ContactsContract.Data;
+ import android.telephony.PhoneNumberUtils;
+ import android.util.Log;
+  
+ import java.util.HashMap;
+ //change
+ public class Contact { //联系人
+     private static HashMap<String, String> sContactCache;
+     private static final String TAG = "Contact";
+  
+     // 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;
+         }
+     }
+ }
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java
index f240604..1cdfe5e 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java
@@ -15,15 +15,19 @@
  */
 
 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;
-
+ 
     /**
      * Following IDs are system folders' identifiers
      * {@link Notes#ID_ROOT_FOLDER } is default folder
@@ -34,246 +38,282 @@ public class Notes {
     public static final int ID_TEMPARAY_FOLDER = -1;
     public static final int ID_CALL_RECORD_FOLDER = -2;
     public static final int ID_TRASH_FOLER = -3;
-
-    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;
     public static final int TYPE_WIDGET_4X            = 1;
-
+ 
     public static class DataConstants {
         public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
         public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
     }
-
+ 
     /**
      * 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
          * <P> Type: INTEGER (long) </P>
          */
         public static final String ID = "_id";
-
+ 
         /**
          * The parent's id for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String PARENT_ID = "parent_id";
-
+        public static final String PARENT_ID = "parent_id";//为什么会有parent_id
+ 
         /**
          * Created data for note or folder
          * <P> Type: INTEGER (long) </P>
          */
         public static final String CREATED_DATE = "created_date";
-
+ 
         /**
          * Latest modified date
          * <P> Type: INTEGER (long) </P>
          */
         public static final String MODIFIED_DATE = "modified_date";
-
-
+ 
+ 
         /**
          * Alert date
          * <P> Type: INTEGER (long) </P>
          */
         public static final String ALERTED_DATE = "alert_date";
-
+ 
         /**
          * Folder's name or text content of note
          * <P> Type: TEXT </P>
          */
         public static final String SNIPPET = "snippet";
-
+ 
         /**
          * Note's widget id
          * <P> Type: INTEGER (long) </P>
          */
         public static final String WIDGET_ID = "widget_id";
-
+ 
         /**
          * Note's widget type
          * <P> Type: INTEGER (long) </P>
          */
         public static final String WIDGET_TYPE = "widget_type";
-
+ 
         /**
          * Note's background color's id
          * <P> Type: INTEGER (long) </P>
          */
         public static final String BG_COLOR_ID = "bg_color_id";
-
+ 
         /**
          * For text note, it doesn't has attachment, for multi-media
          * note, it has at least one attachment
          * <P> Type: INTEGER </P>
          */
         public static final String HAS_ATTACHMENT = "has_attachment";
-
+ 
         /**
          * Folder's count of notes
          * <P> Type: INTEGER (long) </P>
          */
         public static final String NOTES_COUNT = "notes_count";
-
+ 
         /**
          * The file type: folder or note
          * <P> Type: INTEGER </P>
          */
         public static final String TYPE = "type";
-
+ 
         /**
          * The last sync id
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String SYNC_ID = "sync_id";
-
+        public static final String SYNC_ID = "sync_id";//同步
+ 
         /**
          * Sign to indicate local modified or not
          * <P> Type: INTEGER </P>
          */
         public static final String LOCAL_MODIFIED = "local_modified";
-
+ 
         /**
          * Original parent id before moving into temporary folder
          * <P> Type : INTEGER </P>
          */
         public static final String ORIGIN_PARENT_ID = "origin_parent_id";
-
+ 
         /**
          * The gtask id
          * <P> Type : TEXT </P>
          */
         public static final String GTASK_ID = "gtask_id";
-
+ 
         /**
          * The version code
          * <P> Type : INTEGER (long) </P>
          */
         public static final String VERSION = "version";
-    }
-
+    }//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
          * <P> Type: INTEGER (long) </P>
          */
         public static final String ID = "_id";
-
+ 
         /**
          * The MIME type of the item represented by this row.
          * <P> Type: Text </P>
          */
         public static final String MIME_TYPE = "mime_type";
-
+ 
         /**
          * The reference id to note that this data belongs to
          * <P> Type: INTEGER (long) </P>
          */
         public static final String NOTE_ID = "note_id";
-
+ 
         /**
          * Created data for note or folder
          * <P> Type: INTEGER (long) </P>
          */
         public static final String CREATED_DATE = "created_date";
-
+ 
         /**
          * Latest modified date
          * <P> Type: INTEGER (long) </P>
          */
         public static final String MODIFIED_DATE = "modified_date";
-
+ 
         /**
          * Data's content
          * <P> Type: TEXT </P>
          */
         public static final String CONTENT = "content";
-
-
+ 
+ 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
+         * 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
          * <P> Type: Integer 1:check list mode 0: normal mode </P>
          */
         public static final String MODE = DATA1;
-
+ 
         public static final int MODE_CHECK_LIST = 1;
-
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
-
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
-
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
-    }
-
+ 
+        public static final String CONTENT_TYPE = 
+ 
+"vnd.android.cursor.dir/text_note";
+ 
+        public static final String CONTENT_ITEM_TYPE = 
+ 
+"vnd.android.cursor.item/text_note";
+ 
+        public static final Uri CONTENT_URI = Uri.parse("content://" + 
+ 
+AUTHORITY + "/text_note");
+    }//文本内容的数据结构
+ 
     public static final class CallNote implements DataColumns {
         /**
          * Call date for this record
          * <P> Type: INTEGER (long) </P>
          */
         public static final String CALL_DATE = DATA1;
-
+ 
         /**
          * Phone number for this record
          * <P> Type: TEXT </P>
          */
         public static final String PHONE_NUMBER = DATA3;
-
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
-
-        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");
-    }
-}
+ 
+        public static final String CONTENT_TYPE = 
+ 
+"vnd.android.cursor.dir/call_note";
+ 
+        public static final String CONTENT_ITEM_TYPE = 
+ 
+"vnd.android.cursor.item/call_note";
+ 
+        public static final Uri CONTENT_URI = Uri.parse("content://" + 
+ 
+AUTHORITY + "/call_note");
+    }//电话内容的数据结构
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
index ffe5d57..531e473 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
@@ -15,33 +15,33 @@
  */
 
 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";
     }
-
+ 
     private static final String TAG = "NotesDatabaseHelper";
-
+ 
     private static NotesDatabaseHelper mInstance;
-
+ 
     private static final String CREATE_NOTE_TABLE_SQL =
         "CREATE TABLE " + TABLE.NOTE + "(" +
             NoteColumns.ID + " INTEGER PRIMARY KEY," +
@@ -61,8 +61,8 @@ 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 + "(" +
             DataColumns.ID + " INTEGER PRIMARY KEY," +
@@ -76,12 +76,12 @@ 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
      */
@@ -92,8 +92,8 @@ 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
      */
@@ -105,8 +105,8 @@ 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
      */
@@ -117,8 +117,8 @@ 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
      */
@@ -130,8 +130,8 @@ 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}
      */
@@ -143,8 +143,8 @@ 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
      */
@@ -156,8 +156,8 @@ 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
      */
@@ -169,8 +169,8 @@ 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
      */
@@ -180,8 +180,8 @@ 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
      */
@@ -191,8 +191,8 @@ 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
      */
@@ -204,19 +204,19 @@ 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");
         db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
@@ -225,7 +225,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
         db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
         db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
-
+ 
         db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
         db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
         db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
@@ -233,18 +233,19 @@ 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();
-
+ 
         /**
          * call record foler for call notes
          */
         values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
-
+ 
         /**
          * root folder which is default folder
          */
@@ -252,7 +253,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
-
+ 
         /**
          * temporary folder which is used for moving note
          */
@@ -260,7 +261,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
-
+ 
         /**
          * create trash folder
          */
@@ -268,78 +269,80 @@ 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");
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
         db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
-
+ 
         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) {
         boolean reCreateTriggers = false;
         boolean skipV2 = false;
-
+ 
         if (oldVersion == 1) {
             upgradeToV2(db);
             skipV2 = true; // this upgrade including the upgrade from v2 to v3
             oldVersion++;
         }
-
+ 
         if (oldVersion == 2 && !skipV2) {
             upgradeToV3(db);
             reCreateTriggers = true;
             oldVersion++;
         }
-
+ 
         if (oldVersion == 3) {
             upgradeToV4(db);
             oldVersion++;
         }
-
+ 
         if (reCreateTriggers) {
             reCreateNoteTableTriggers(db);
             reCreateDataTableTriggers(db);
         }
-
+ 
         if (oldVersion != newVersion) {
             throw new IllegalStateException("Upgrade notes database to version " + newVersion
                     + "fails");
         }
-    }
-
+    }//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
         db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
@@ -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
 }
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java
index edb0a60..1ed1bd8 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java
@@ -15,8 +15,7 @@
  */
 
 package net.micode.notes.data;
-
-
+ 
 import android.app.SearchManager;
 import android.content.ContentProvider;
 import android.content.ContentUris;
@@ -28,30 +27,38 @@ import android.database.sqlite.SQLiteDatabase;
 import android.net.Uri;
 import android.text.TextUtils;
 import android.util.Log;
-
+ 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.NotesDatabaseHelper.TABLE;
-
-
+//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;
-
+ 
     private static final String TAG = "NotesProvider";
-
+ 
     private static final int URI_NOTE            = 1;
     private static final int URI_NOTE_ITEM       = 2;
     private static final int URI_DATA            = 3;
     private static final int URI_DATA_ITEM       = 4;
-
+ 
     private static final int URI_SEARCH          = 5;
     private static final int URI_SEARCH_SUGGEST  = 6;
-
+ 
     static {
+    	// 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);
@@ -60,11 +67,12 @@ public class NotesProvider extends ContentProvider {
         mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST);
         mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST);
     }
-
+ 
     /**
      * 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 + ","
@@ -72,26 +80,32 @@ 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 ?"
         + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
         + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
-
+ 
     @Override
+    // Context只有在onCreate()中才被初始化
+    // 对mHelper进行实例化
     public boolean onCreate() {
         mHelper = NotesDatabaseHelper.getInstance(getContext());
         return true;
     }
-
+ 
     @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);
@@ -113,23 +127,26 @@ 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");
                 }
-
+ 
                 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 {
                     searchString = uri.getQueryParameter("pattern");
                 }
-
+ 
                 if (TextUtils.isEmpty(searchString)) {
                     return null;
                 }
-
+ 
                 try {
                     searchString = String.format("%%%s%%", searchString);
                     c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
@@ -139,6 +156,7 @@ public class NotesProvider extends ContentProvider {
                 }
                 break;
             default:
+            	// 抛出异常
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
         if (c != null) {
@@ -146,15 +164,19 @@ public class NotesProvider extends ContentProvider {
         }
         return c;
     }
-
+ 
     @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);
@@ -163,28 +185,33 @@ 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);
         }
-
+ 
         // Notify the data uri
         if (dataId > 0) {
             getContext().getContentResolver().notifyChange(
                     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)) {
@@ -226,8 +253,9 @@ public class NotesProvider extends ContentProvider {
         }
         return count;
     }
-
+ 
     @Override
+    // 更新一个uri
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
@@ -257,7 +285,7 @@ public class NotesProvider extends ContentProvider {
             default:
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
-
+ 
         if (count > 0) {
             if (updateData) {
                 getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
@@ -266,11 +294,13 @@ 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 ");
@@ -278,7 +308,7 @@ public class NotesProvider extends ContentProvider {
         sql.append(" SET ");
         sql.append(NoteColumns.VERSION);
         sql.append("=" + NoteColumns.VERSION + "+1 ");
-
+ 
         if (id > 0 || !TextUtils.isEmpty(selection)) {
             sql.append(" WHERE ");
         }
@@ -292,14 +322,15 @@ 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());
     }
-
+ 
     @Override
     public String getType(Uri uri) {
         // TODO Auto-generated method stub
         return null;
     }
-
-}
+ 
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java
index 39f6ec4..e383ec3 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java
@@ -35,56 +35,60 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 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;   
+ 
     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;
     }
-
+ 
     /**
      * 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());
     }
-
+ 
     public int exportToText() {
         return mTextExport.exportToText();
     }
-
+ 
     public String getExportedTextFileName() {
         return mTextExport.mFileName;
     }
-
+ 
     public String getExportedTextFileDir() {
         return mTextExport.mFileDirectory;
     }
-
+ 
     private static class TextExport {
         private static final String[] NOTE_PROJECTION = {
                 NoteColumns.ID,
@@ -92,13 +96,13 @@ public class BackupUtils {
                 NoteColumns.SNIPPET,
                 NoteColumns.TYPE
         };
-
+ 
         private static final int NOTE_COLUMN_ID = 0;
-
+ 
         private static final int NOTE_COLUMN_MODIFIED_DATE = 1;
-
+ 
         private static final int NOTE_COLUMN_SNIPPET = 2;
-
+ 
         private static final String[] DATA_PROJECTION = {
                 DataColumns.CONTENT,
                 DataColumns.MIME_TYPE,
@@ -107,71 +111,71 @@ public class BackupUtils {
                 DataColumns.DATA3,
                 DataColumns.DATA4,
         };
-
+ 
         private static final int DATA_COLUMN_CONTENT = 0;
-
+ 
         private static final int DATA_COLUMN_MIME_TYPE = 1;
-
+ 
         private static final int DATA_COLUMN_CALL_DATE = 2;
-
+ 
         private static final int DATA_COLUMN_PHONE_NUMBER = 4;
-
+ 
         private final String [] TEXT_FORMAT;
         private static final int FORMAT_FOLDER_NAME          = 0;
         private static final int FORMAT_NOTE_DATE            = 1;
         private static final int FORMAT_NOTE_CONTENT         = 2;
-
+ 
         private Context mContext;
         private String mFileName;
         private String mFileDirectory;
-
+ 
         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();
             }
         }
-
+ 
         /**
          * 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);
@@ -180,8 +184,8 @@ public class BackupUtils {
                             String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
                             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));
                             }
@@ -214,29 +218,29 @@ public class BackupUtils {
                 Log.e(TAG, e.toString());
             }
         }
-
+ 
         /**
          * 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;
             }
-
+ 
             PrintStream ps = getExportToTextPrintStream();
             if (ps == null) {
                 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,
                     "(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND "
                             + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR "
                             + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER, null, null);
-
+ 
             if (folderCursor != null) {
                 if (folderCursor.moveToFirst()) {
                     do {
@@ -256,14 +260,14 @@ 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,
                     NoteColumns.TYPE + "=" + +Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID
                             + "=0", null, null);
-
+ 
             if (noteCursor != null) {
                 if (noteCursor.moveToFirst()) {
                     do {
@@ -278,14 +282,14 @@ public class BackupUtils {
                 noteCursor.close();
             }
             ps.close();
-
+ 
             return STATE_SUCCESS;
         }
-
+ 
         /**
          * 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;
@@ -308,22 +312,22 @@ public class BackupUtils {
             return ps;
         }
     }
-
+ 
     /**
      * Generate the text file to store imported data
      */
     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/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java
index 2a14982..3e84b20 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java
@@ -35,9 +35,11 @@ import java.util.ArrayList;
 import java.util.HashSet;
 
 
+package net.micode.notes.tool;
+ 
 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;
@@ -46,19 +48,20 @@ public class DataUtils {
             Log.d(TAG, "no id is in the hashset");
             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;
@@ -71,33 +74,33 @@ public class DataUtils {
         }
         return false;
     }
-
+ 
     public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
         ContentValues values = new ContentValues();
         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,
             long folderId) {
         if (ids == null) {
             Log.d(TAG, "the ids is null");
             return true;
         }
-
+ 
         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;
@@ -110,7 +113,7 @@ public class DataUtils {
         }
         return false;
     }
-
+ 
     /**
      * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
      */
@@ -119,13 +122,13 @@ 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 {
@@ -134,29 +137,29 @@ 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();
         }
         return exist;
     }
-
+ 
     public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                 null, null, null, null);
-
+ 
         boolean exist = false;
         if (cursor != null) {
             if (cursor.getCount() > 0) {
@@ -166,11 +169,11 @@ public class DataUtils {
         }
         return exist;
     }
-
+ 
     public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
                 null, null, null, null);
-
+ 
         boolean exist = false;
         if (cursor != null) {
             if (cursor.getCount() > 0) {
@@ -180,13 +183,14 @@ public class DataUtils {
         }
         return exist;
     }
-
+ 
     public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
         Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
                 NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
                 " 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) {
@@ -196,14 +200,14 @@ public class DataUtils {
         }
         return exist;
     }
-
+ 
     public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
         Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
                 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()) {
@@ -211,26 +215,26 @@ 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();
         }
         return set;
     }
-
+ 
     public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
         Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                 new String [] { CallNote.PHONE_NUMBER },
                 CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
                 new String [] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE },
                 null);
-
+ 
         if (cursor != null && cursor.moveToFirst()) {
             try {
                 return cursor.getString(0);
@@ -242,7 +246,7 @@ public class DataUtils {
         }
         return "";
     }
-
+ 
     public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
         Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                 new String [] { CallNote.NOTE_ID },
@@ -250,11 +254,12 @@ 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());
                 }
@@ -263,14 +268,14 @@ public class DataUtils {
         }
         return 0;
     }
-
+ 
     public static String getSnippetById(ContentResolver resolver, long noteId) {
         Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
                 new String [] { NoteColumns.SNIPPET },
                 NoteColumns.ID + "=?",
                 new String [] { String.valueOf(noteId)},
-                null);
-
+                null);//查询条件：noteId
+ 
         if (cursor != null) {
             String snippet = "";
             if (cursor.moveToFirst()) {
@@ -281,8 +286,7 @@ 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 +296,5 @@ public class DataUtils {
         }
         return snippet;
     }
-}
+    
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/GTaskStringUtils.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/GTaskStringUtils.java
index 666b729..c28c295 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/GTaskStringUtils.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/GTaskStringUtils.java
@@ -14,100 +14,102 @@
  * limitations under the License.
  */
 
+//�����˺ܶ�ľ�̬�ַ������ṩjsonObject����Ӧ�ַ�����"key"��
 package net.micode.notes.tool;
-
-public class GTaskStringUtils {
-
+ 
+//����ඨ����jsonObject�ṩKey
+public class GTaskStringUtils { 
+ 
     public final static String GTASK_JSON_ACTION_ID = "action_id";
-
+ 
     public final static String GTASK_JSON_ACTION_LIST = "action_list";
-
+ 
     public final static String GTASK_JSON_ACTION_TYPE = "action_type";
-
+ 
     public final static String GTASK_JSON_ACTION_TYPE_CREATE = "create";
-
+ 
     public final static String GTASK_JSON_ACTION_TYPE_GETALL = "get_all";
-
+ 
     public final static String GTASK_JSON_ACTION_TYPE_MOVE = "move";
-
+ 
     public final static String GTASK_JSON_ACTION_TYPE_UPDATE = "update";
-
+ 
     public final static String GTASK_JSON_CREATOR_ID = "creator_id";
-
+ 
     public final static String GTASK_JSON_CHILD_ENTITY = "child_entity";
-
+ 
     public final static String GTASK_JSON_CLIENT_VERSION = "client_version";
-
+ 
     public final static String GTASK_JSON_COMPLETED = "completed";
-
+ 
     public final static String GTASK_JSON_CURRENT_LIST_ID = "current_list_id";
-
+ 
     public final static String GTASK_JSON_DEFAULT_LIST_ID = "default_list_id";
-
+ 
     public final static String GTASK_JSON_DELETED = "deleted";
-
+ 
     public final static String GTASK_JSON_DEST_LIST = "dest_list";
-
+ 
     public final static String GTASK_JSON_DEST_PARENT = "dest_parent";
-
+ 
     public final static String GTASK_JSON_DEST_PARENT_TYPE = "dest_parent_type";
-
+ 
     public final static String GTASK_JSON_ENTITY_DELTA = "entity_delta";
-
+ 
     public final static String GTASK_JSON_ENTITY_TYPE = "entity_type";
-
+ 
     public final static String GTASK_JSON_GET_DELETED = "get_deleted";
-
+ 
     public final static String GTASK_JSON_ID = "id";
-
+ 
     public final static String GTASK_JSON_INDEX = "index";
-
+ 
     public final static String GTASK_JSON_LAST_MODIFIED = "last_modified";
-
+ 
     public final static String GTASK_JSON_LATEST_SYNC_POINT = "latest_sync_point";
-
+ 
     public final static String GTASK_JSON_LIST_ID = "list_id";
-
+ 
     public final static String GTASK_JSON_LISTS = "lists";
-
+ 
     public final static String GTASK_JSON_NAME = "name";
-
+ 
     public final static String GTASK_JSON_NEW_ID = "new_id";
-
+ 
     public final static String GTASK_JSON_NOTES = "notes";
-
+ 
     public final static String GTASK_JSON_PARENT_ID = "parent_id";
-
+ 
     public final static String GTASK_JSON_PRIOR_SIBLING_ID = "prior_sibling_id";
-
+ 
     public final static String GTASK_JSON_RESULTS = "results";
-
+ 
     public final static String GTASK_JSON_SOURCE_LIST = "source_list";
-
+ 
     public final static String GTASK_JSON_TASKS = "tasks";
-
+ 
     public final static String GTASK_JSON_TYPE = "type";
-
+ 
     public final static String GTASK_JSON_TYPE_GROUP = "GROUP";
-
+ 
     public final static String GTASK_JSON_TYPE_TASK = "TASK";
-
+ 
     public final static String GTASK_JSON_USER = "user";
-
+ 
     public final static String MIUI_FOLDER_PREFFIX = "[MIUI_Notes]";
-
+ 
     public final static String FOLDER_DEFAULT = "Default";
-
+ 
     public final static String FOLDER_CALL_NOTE = "Call_Note";
-
+ 
     public final static String FOLDER_META = "METADATA";
-
+ 
     public final static String META_HEAD_GTASK_ID = "meta_gid";
-
+ 
     public final static String META_HEAD_NOTE = "meta_note";
-
+ 
     public final static String META_HEAD_DATA = "meta_data";
-
+ 
     public final static String META_NOTE_NAME = "[META INFO] DON'T UPDATE AND DELETE";
-
-}
+ 
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/ResourceParser.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/ResourceParser.java
index 1ad3ad6..8a3a0a0 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/ResourceParser.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/ResourceParser.java
@@ -22,24 +22,45 @@ import android.preference.PreferenceManager;
 import net.micode.notes.R;
 import net.micode.notes.ui.NotesPreferenceActivity;
 
+/**
+ * ResourceParser����һ�������࣬���ڽ���Ӧ�ó�����ʹ�õ���Դ��
+ */
 public class ResourceParser {
 
+    /**
+     * ���屳����ɫ�ij���
+     */
     public static final int YELLOW           = 0;
     public static final int BLUE             = 1;
     public static final int WHITE            = 2;
     public static final int GREEN            = 3;
     public static final int RED              = 4;
 
+    /**
+     * Ĭ�ϱ�����ɫ
+     */
     public static final int BG_DEFAULT_COLOR = YELLOW;
 
+    /**
+     * �����ı���С�ij���
+     */
     public static final int TEXT_SMALL       = 0;
     public static final int TEXT_MEDIUM      = 1;
     public static final int TEXT_LARGE       = 2;
     public static final int TEXT_SUPER       = 3;
 
+    /**
+     * Ĭ���ı���С
+     */
     public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;
 
+    /**
+     * NoteBgResources�������ʼDZ༭������ص���Դ��
+     */
     public static class NoteBgResources {
+        /**
+         * �ʼDZ༭������Դ����
+         */
         private final static int [] BG_EDIT_RESOURCES = new int [] {
             R.drawable.edit_yellow,
             R.drawable.edit_blue,
@@ -48,6 +69,9 @@ public class ResourceParser {
             R.drawable.edit_red
         };
 
+        /**
+         * �ʼDZ༭���ⱳ����Դ����
+         */
         private final static int [] BG_EDIT_TITLE_RESOURCES = new int [] {
             R.drawable.edit_title_yellow,
             R.drawable.edit_title_blue,
@@ -56,15 +80,30 @@ public class ResourceParser {
             R.drawable.edit_title_red
         };
 
+        /**
+         * ��ȡ�ʼDZ༭������Դ
+         * @param id ��Դid
+         * @return �ʼDZ༭������Դ
+         */
         public static int getNoteBgResource(int id) {
             return BG_EDIT_RESOURCES[id];
         }
 
+        /**
+         * ��ȡ�ʼDZ༭���ⱳ����Դ
+         * @param id ��Դid
+         * @return �ʼDZ༭���ⱳ����Դ
+         */
         public static int getNoteTitleBgResource(int id) {
             return BG_EDIT_TITLE_RESOURCES[id];
         }
     }
 
+    /**
+     * ��ȡĬ�ϱ���id
+     * @param context �����Ķ���
+     * @return Ĭ�ϱ���id
+     */
     public static int getDefaultBgId(Context context) {
         if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
                 NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
@@ -74,7 +113,13 @@ public class ResourceParser {
         }
     }
 
+    /**
+     * NoteItemBgResources�������ʼ��б������ص���Դ��
+     */
     public static class NoteItemBgResources {
+        /**
+         * ��һ�����Դ����
+         */
         private final static int [] BG_FIRST_RESOURCES = new int [] {
             R.drawable.list_yellow_up,
             R.drawable.list_blue_up,
@@ -83,6 +128,9 @@ public class ResourceParser {
             R.drawable.list_red_up
         };
 
+        /**
+         * ��ͨ�����Դ����
+         */
         private final static int [] BG_NORMAL_RESOURCES = new int [] {
             R.drawable.list_yellow_middle,
             R.drawable.list_blue_middle,
@@ -91,6 +139,9 @@ public class ResourceParser {
             R.drawable.list_red_middle
         };
 
+        /**
+         * ���һ�����Դ����
+         */
         private final static int [] BG_LAST_RESOURCES = new int [] {
             R.drawable.list_yellow_down,
             R.drawable.list_blue_down,
@@ -99,6 +150,9 @@ public class ResourceParser {
             R.drawable.list_red_down,
         };
 
+        /**
+         * �������Դ����
+         */
         private final static int [] BG_SINGLE_RESOURCES = new int [] {
             R.drawable.list_yellow_single,
             R.drawable.list_blue_single,
@@ -107,28 +161,58 @@ public class ResourceParser {
             R.drawable.list_red_single
         };
 
+        /**
+         * ��ȡ��һ�����Դ
+         * @param id ��Դid
+         * @return ��һ�����Դ
+         */
         public static int getNoteBgFirstRes(int id) {
             return BG_FIRST_RESOURCES[id];
         }
 
+        /**
+         * ��ȡ���һ�����Դ
+         * @param id ��Դid
+         * @return ���һ�����Դ
+         */
         public static int getNoteBgLastRes(int id) {
             return BG_LAST_RESOURCES[id];
         }
 
+        /**
+         * ��ȡ�������Դ
+         * @param id ��Դid
+         * @return �������Դ
+         */
         public static int getNoteBgSingleRes(int id) {
             return BG_SINGLE_RESOURCES[id];
         }
 
+        /**
+         * ��ȡ��ͨ�����Դ
+         * @param id ��Դid
+         * @return ��ͨ�����Դ
+         */
         public static int getNoteBgNormalRes(int id) {
             return BG_NORMAL_RESOURCES[id];
         }
 
+        /**
+         * ��ȡ�ļ��б�����Դ
+         * @return �ļ��б�����Դ
+         */
         public static int getFolderBgRes() {
             return R.drawable.list_folder;
         }
     }
 
+    /**
+     * WidgetBgResources�������С����������ص���Դ��
+     */
     public static class WidgetBgResources {
+        /**
+         * 2xС����������Դ����
+         */
         private final static int [] BG_2X_RESOURCES = new int [] {
             R.drawable.widget_2x_yellow,
             R.drawable.widget_2x_blue,
@@ -137,10 +221,18 @@ public class ResourceParser {
             R.drawable.widget_2x_red,
         };
 
+        /**
+         * ��ȡ2xС����������Դ
+         * @param id ��Դid
+         * @return 2xС����������Դ
+         */
         public static int getWidget2xBgResource(int id) {
             return BG_2X_RESOURCES[id];
         }
 
+        /**
+         * 4xС����������Դ����
+         */
         private final static int [] BG_4X_RESOURCES = new int [] {
             R.drawable.widget_4x_yellow,
             R.drawable.widget_4x_blue,
@@ -149,12 +241,23 @@ public class ResourceParser {
             R.drawable.widget_4x_red
         };
 
+        /**
+         * ��ȡ4xС����������Դ
+         * @param id ��Դid
+         * @return 4xС����������Դ
+         */
         public static int getWidget4xBgResource(int id) {
             return BG_4X_RESOURCES[id];
         }
     }
 
+    /**
+     * TextAppearanceResources��������ı������ص���Դ��
+     */
     public static class TextAppearanceResources {
+        /**
+         * �ı������Դ����
+         */
         private final static int [] TEXTAPPEARANCE_RESOURCES = new int [] {
             R.style.TextAppearanceNormal,
             R.style.TextAppearanceMedium,
@@ -162,11 +265,15 @@ public class ResourceParser {
             R.style.TextAppearanceSuper
         };
 
+        /**
+         * ��ȡ�ı������Դ
+         * @param id ��Դid
+         * @return �ı������Դ
+         */
         public static int getTexAppearanceResource(int id) {
             /**
-             * HACKME: Fix bug of store the resource id in shared preference.
-             * The id may larger than the length of resources, in this case,
-             * return the {@link ResourceParser#BG_DEFAULT_FONT_SIZE}
+             * HACKME: �޸��洢�ڹ�����ѡ���е���Դid�Ĵ���
+             * id���ܴ�����Դ����ij��ȣ�����������£�����BG_DEFAULT_FONT_SIZE��
              */
             if (id >= TEXTAPPEARANCE_RESOURCES.length) {
                 return BG_DEFAULT_FONT_SIZE;
@@ -174,6 +281,10 @@ public class ResourceParser {
             return TEXTAPPEARANCE_RESOURCES[id];
         }
 
+        /**
+         * ��ȡ��Դ�Ĵ�С
+         * @return ��Դ�Ĵ�С
+         */
         public static int getResourcesSize() {
             return TEXTAPPEARANCE_RESOURCES.length;
         }
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/FoldersListAdapter.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/FoldersListAdapter.java
index 96b77da..9fdba5b 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/FoldersListAdapter.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/FoldersListAdapter.java
@@ -1,21 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
-
+ 
 import android.content.Context;
 import android.database.Cursor;
 import android.view.View;
@@ -23,31 +7,36 @@ import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 import android.widget.LinearLayout;
 import android.widget.TextView;
-
+ 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 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;
-
+ 
     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) {
         if (view instanceof FolderListItem) {
@@ -55,26 +44,28 @@ 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);
         }
-
+ 
         public void bind(String name) {
             mName.setText(name);
         }
     }
-
+ 
 }
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java
index 0bbc25d..3b98c60 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java
@@ -1,21 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
-
+ 
 import android.app.Activity;
 import android.app.AlarmManager;
 import android.app.AlertDialog;
@@ -51,7 +35,7 @@ import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
-
+ 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.TextNote;
@@ -64,26 +48,28 @@ import net.micode.notes.ui.DateTimePickerDialog.OnDateTimeSetListener;
 import net.micode.notes.ui.NoteEditText.OnTextViewChangeListener;
 import net.micode.notes.widget.NoteWidgetProvider_2x;
 import net.micode.notes.widget.NoteWidgetProvider_4x;
-
+ 
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.regex.Matcher;
 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;
-
+ 
         public ImageView ivAlertIcon;
-
+ 
         public TextView tvAlertDate;
-
+ 
         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);
@@ -91,8 +77,9 @@ 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>();
     static {
         sBgSelectorSelectionMap.put(ResourceParser.YELLOW, R.id.iv_bg_yellow_select);
@@ -100,67 +87,73 @@ 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>();
     static {
         sFontSizeBtnsMap.put(R.id.ll_font_large, ResourceParser.TEXT_LARGE);
         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>();
     static {
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_LARGE, R.id.iv_large_select);
         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";
-
+ 
     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;
-
+ 
     public static final String TAG_CHECKED = String.valueOf('\u221A');
     public static final String TAG_UNCHECKED = String.valueOf('\u25A1');
-
+ 
     private LinearLayout mEditTextList;
-
+    //线性布局
     private String mUserQuery;
     private Pattern mPattern;
-
+ 
     @Override
     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;
         }
         initResources();
     }
-
+ 
     /**
      * Current activity may be killed when the memory is low. Once it is killed, for another time
      * user load this activity, we should restore the former state
@@ -176,9 +169,9 @@ 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) {
         /**
          * If the user specified the {@link Intent#ACTION_VIEW} but not provided with id,
@@ -188,34 +181,42 @@ 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 +224,7 @@ 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);
@@ -240,16 +241,18 @@ 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
                             | WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
@@ -261,16 +264,18 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         mWorkingNote.setOnSettingStatusChangedListener(this);
         return true;
     }
-
+ 
     @Override
     protected void onResume() {
         super.onResume();
         initNoteScreen();
     }
-
+ 
     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 {
@@ -282,42 +287,45 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());
         mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());
-
+ 
         mNoteHeaderHolder.tvModified.setText(DateUtils.formatDateTime(this,
                 mWorkingNote.getModifiedDate(), DateUtils.FORMAT_SHOW_DATE
                         | DateUtils.FORMAT_NUMERIC_DATE | DateUtils.FORMAT_SHOW_TIME
                         | DateUtils.FORMAT_SHOW_YEAR));
-
+ 
         /**
          * TODO: Add the menu for setting alert. Currently disable it because the DateTimePicker
          * is not ready
          */
         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);
         };
     }
-
+ 
     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
         initActivityState(intent);
     }
-
+ 
     @Override
     protected void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
@@ -329,26 +337,29 @@ 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);
@@ -357,12 +368,14 @@ 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;
     }
-
+ 
     private void initResources() {
         mHeadViewPanel = findViewById(R.id.note_title);
         mNoteHeaderHolder = new HeadViewHolder();
@@ -377,13 +390,13 @@ 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);
         /**
@@ -396,7 +409,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         mEditTextList = (LinearLayout) findViewById(R.id.note_edit_list);
     }
-
+ 
     @Override
     protected void onPause() {
         super.onPause();
@@ -405,7 +418,7 @@ 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) {
@@ -416,15 +429,15 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             Log.e(TAG, "Unspported widget type");
             return;
         }
-
+ 
         intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
             mWorkingNote.getWidgetId()
         });
-
+ 
         sendBroadcast(intent);
         setResult(RESULT_OK, intent);
     }
-
+ 
     public void onClick(View v) {
         int id = v.getId();
         if (id == R.id.btn_set_bg_color) {
@@ -450,18 +463,18 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             }
             mFontSizeSelector.setVisibility(View.GONE);
         }
-    }
-
+    }//************************存在问题
+ 
     @Override
     public void onBackPressed() {
         if(clearSettingState()) {
             return;
         }
-
+ 
         saveNote();
         super.onBackPressed();
     }
-
+ 
     private boolean clearSettingState() {
         if (mNoteBgColorSelector.getVisibility() == View.VISIBLE) {
             mNoteBgColorSelector.setVisibility(View.GONE);
@@ -472,15 +485,16 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         return false;
     }
-
+ 
     public void onBackgroundColorChanged() {
         findViewById(sBgSelectorSelectionMap.get(mWorkingNote.getBgColorId())).setVisibility(
                 View.VISIBLE);
         mNoteEditorPanel.setBackgroundResource(mWorkingNote.getBgColorResId());
         mHeadViewPanel.setBackgroundResource(mWorkingNote.getTitleBgResId());
     }
-
+ 
     @Override
+    //对选择菜单的准备
     public boolean onPrepareOptionsMenu(Menu menu) {
         if (isFinishing()) {
             return true;
@@ -489,6 +503,7 @@ 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);
         }
@@ -504,47 +519,73 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
         return true;
     }
-
+ 
     @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:
@@ -552,112 +593,171 @@ 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 +766,101 @@ 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) {
@@ -739,75 +871,111 @@ 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();
         }
-
+ 
         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 +984,16 @@ 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 +1002,16 @@ 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 +1019,12 @@ 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
@@ -853,26 +1033,35 @@ 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();
     }
-    
-
-    public void OnOpenMenu(View view) {
-		openOptionsMenu();
-	}
 }
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java
index 2afe2a8..4c87482 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteEditText.java
@@ -1,19 +1,3 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
 
 import android.content.Context;
@@ -37,7 +21,8 @@ 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 +30,8 @@ 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 +42,20 @@ 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 +66,56 @@ 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 +124,147 @@ 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/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteItemData.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteItemData.java
index 0f5a878..7b9be8d 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteItemData.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NoteItemData.java
@@ -1,31 +1,15 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
-
+ 
 import android.content.Context;
 import android.database.Cursor;
 import android.text.TextUtils;
-
+ 
 import net.micode.notes.data.Contact;
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.tool.DataUtils;
-
-
+ 
+ 
 public class NoteItemData {
     static final String [] PROJECTION = new String [] {
         NoteColumns.ID,
@@ -41,7 +25,7 @@ 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;
@@ -54,7 +38,7 @@ public class NoteItemData {
     private static final int TYPE_COLUMN                  = 9;
     private static final int WIDGET_ID_COLUMN             = 10;
     private static final int WIDGET_TYPE_COLUMN           = 11;
-
+ 
     private long mId;
     private long mAlertDate;
     private int mBgColorId;
@@ -69,14 +53,15 @@ public class NoteItemData {
     private int mWidgetType;
     private String mName;
     private String mPhoneNumber;
-
+ 
     private boolean mIsLastItem;
     private boolean mIsFirstItem;
     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);
@@ -91,134 +76,139 @@ public class NoteItemData {
         mType = cursor.getInt(TYPE_COLUMN);
         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;
                 }
             }
         }
-
+ 
         if (mName == null) {
             mName = "";
         }
         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;
     }
-
+ 
     public boolean isMultiFollowingFolder() {
         return mIsMultiNotesFollowingFolder;
     }
-
+ 
     public boolean isLast() {
         return mIsLastItem;
     }
-
+ 
     public String getCallName() {
         return mName;
     }
-
+ 
     public boolean isFirst() {
         return mIsFirstItem;
     }
-
+ 
     public boolean isSingle() {
         return mIsOnlyOneItem;
     }
-
+ 
     public long getId() {
         return mId;
     }
-
+ 
     public long getAlertDate() {
         return mAlertDate;
     }
-
+ 
     public long getCreatedDate() {
         return mCreatedDate;
     }
-
+ 
     public boolean hasAttachment() {
         return mHasAttachment;
     }
-
+ 
     public long getModifiedDate() {
         return mModifiedDate;
     }
-
+ 
     public int getBgColorId() {
         return mBgColorId;
     }
-
+ 
     public long getParentId() {
         return mParentId;
     }
-
+ 
     public int getNotesCount() {
         return mNotesCount;
     }
-
+ 
     public long getFolderId () {
         return mParentId;
     }
-
+ 
     public int getType() {
         return mType;
     }
-
+ 
     public int getWidgetType() {
         return mWidgetType;
     }
-
+ 
     public int getWidgetId() {
         return mWidgetId;
     }
-
+ 
     public String getSnippet() {
         return mSnippet;
     }
-
+ 
     public boolean hasAlert() {
         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));
     }
-
+ 
     public static int getNoteType(Cursor cursor) {
         return cursor.getInt(TYPE_COLUMN);
     }
-}
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListActivity.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListActivity.java
index 2fa42ce..1e6b10d 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListActivity.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListActivity.java
@@ -1,22 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
-
-import android.R.menu;
+ 
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.Dialog;
@@ -60,6 +43,7 @@ import android.widget.ListView;
 import android.widget.PopupMenu;
 import android.widget.TextView;
 import android.widget.Toast;
+ 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 import net.micode.notes.data.Notes.NoteColumns;
@@ -71,104 +55,118 @@ import net.micode.notes.tool.ResourceParser;
 import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
 import net.micode.notes.widget.NoteWidgetProvider_2x;
 import net.micode.notes.widget.NoteWidgetProvider_4x;
-
+ 
 import java.io.BufferedReader;
 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;
-
+ 
     private static final int MENU_FOLDER_DELETE = 0;
-
+ 
     private static final int MENU_FOLDER_VIEW = 1;
-
+ 
     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
     };
-
+ 
     private ListEditState mState;
-
+ 
     private BackgroundQueryHandler mBackgroundQueryHandler;
-
+ 
     private NotesListAdapter mNotesListAdapter;
-
+ 
     private ListView mNotesListView;
-
+ 
     private Button mAddNewNote;
-    private Button mMenuSet;
-
+ 
     private boolean mDispatch;
-
+ 
     private int mOriginY;
-
+ 
     private int mDispatchY;
-
+ 
     private TextView mTitleBar;
-
+ 
     private long mCurrentFolderId;
-
+ 
     private ContentResolver mContentResolver;
-
+ 
     private ModeCallback mModeCallBack;
-
+ 
     private static final String TAG = "NotesListActivity";
-
+ 
     public static final int NOTES_LISTVIEW_SCROLL_RATE = 30;
-
+ 
     private NoteItemData mFocusNoteDataItem;
-
+ 
     private static final String NORMAL_SELECTION = NoteColumns.PARENT_ID + "=?";
-
+ 
     private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>"
             + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR ("
             + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND "
             + NoteColumns.NOTES_COUNT + ">0)";
-
+ 
     private final static int REQUEST_CODE_OPEN_NODE = 102;
     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();
-
+ 
         /**
          * Insert an introduction when user firstly use this application
          */
         setAppInfoFromRawRes();
     }
-
+ 
     @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);
@@ -181,7 +179,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 e.printStackTrace();
                 return;
             } finally {
-                if(in != null) {
+                if (in != null) {
                     try {
                         in.close();
                     } catch (IOException e) {
@@ -190,12 +188,14 @@ 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");
@@ -203,28 +203,30 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
         }
     }
-
+ 
     @Override
     protected void onStart() {
         super.onStart();
         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());
-        mMenuSet = (Button) findViewById(R.id.btn_set);
         mDispatch = false;
         mDispatchY = 0;
         mOriginY = 0;
@@ -232,16 +234,15 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         mState = ListEditState.NOTE_LIST;
         mModeCallBack = new ModeCallback();
     }
-
+ 
+    // 继承自ListView.MultiChoiceModeListener 和 OnMenuItemClickListener
     private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
         private DropdownMenu mDropDownMenu;
         private ActionMode mActionMode;
-        private Menu menu;
         private MenuItem mMoveMenu;
-
+ 
         public boolean onCreateActionMode(ActionMode mode, Menu menu) {
             getMenuInflater().inflate(R.menu.note_list_options, menu);
-            this.menu = menu;
             menu.findItem(R.id.delete).setOnMenuItemClickListener(this);
             mMoveMenu = menu.findItem(R.id.move);
             if (mFocusNoteDataItem.getParentId() == Notes.ID_CALL_RECORD_FOLDER
@@ -255,8 +256,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             mNotesListAdapter.setChoiceMode(true);
             mNotesListView.setLongClickable(false);
             mAddNewNote.setVisibility(View.GONE);
-            mMenuSet.setVisibility(View.GONE);
-
+ 
             View customView = LayoutInflater.from(NotesListActivity.this).inflate(
                     R.layout.note_list_dropdown_menu, null);
             mode.setCustomView(customView);
@@ -264,21 +264,22 @@ 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;
                 }
-
+ 
             });
             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()) {
@@ -290,63 +291,40 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 }
             }
         }
-
+ 
         public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
             // TODO Auto-generated method stub
             return false;
         }
-
+ 
         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
             // TODO Auto-generated method stub
             return false;
         }
-
+ 
         public void onDestroyActionMode(ActionMode mode) {
             mNotesListAdapter.setChoiceMode(false);
-            mNotesListView.clearChoices();
-            mNotesListView.setItemChecked(0,true);
-            mNotesListView.setItemChecked(0,false);
-            
             mNotesListView.setLongClickable(true);
-            System.out.println("-----------------onDestroyActionMode------------------");
-            mNotesListAdapter.notifyDataSetChanged();
-//            closeOptionsMenu();
-//            mNotesListView.invalidate();
             mAddNewNote.setVisibility(View.VISIBLE);
-            mMenuSet.setVisibility(View.VISIBLE);
-            
-            
-            
-//            mNotesListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
-            
-//            menu.clear();
-//            menu.close();
         }
-        
-        
-
+ 
         public void finishActionMode() {
             mActionMode.finish();
-            mActionMode = null;
-            mNotesListAdapter.setChoiceMode(false);
-            mNotesListView.setLongClickable(true);
         }
-        
-        
-
+ 
         public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
                 boolean checked) {
             mNotesListAdapter.setCheckedItem(position, checked);
             updateMenu();
         }
-
+ 
         public boolean onMenuItemClick(MenuItem item) {
             if (mNotesListAdapter.getSelectedCount() == 0) {
                 Toast.makeText(NotesListActivity.this, getString(R.string.menu_select_none),
                         Toast.LENGTH_SHORT).show();
                 return true;
             }
-
+ 
             switch (item.getItemId()) {
                 case R.id.delete:
                     AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
@@ -373,10 +351,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             return true;
         }
     }
-    
-
+ 
     private class NewNoteOnTouchListener implements OnTouchListener {
-
+ 
         public boolean onTouch(View v, MotionEvent event) {
             switch (event.getAction()) {
                 case MotionEvent.ACTION_DOWN: {
@@ -395,7 +372,7 @@ 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
@@ -434,9 +411,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
             return false;
         }
-
+ 
     };
-
+ 
     private void startAsyncNotesListQuery() {
         String selection = (mCurrentFolderId == Notes.ID_ROOT_FOLDER) ? ROOT_FOLDER_SELECTION
                 : NORMAL_SELECTION;
@@ -445,12 +422,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     String.valueOf(mCurrentFolderId)
                 }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
     }
-
+ 
     private final class BackgroundQueryHandler extends AsyncQueryHandler {
         public BackgroundQueryHandler(ContentResolver contentResolver) {
             super(contentResolver);
         }
-
+ 
         @Override
         protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
             switch (token) {
@@ -469,13 +446,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
         }
     }
-
+ 
     private void showFolderListMenu(Cursor cursor) {
         AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
         builder.setTitle(R.string.menu_title_select_folder);
         final FoldersListAdapter adapter = new FoldersListAdapter(this, cursor);
         builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
-
+ 
             public void onClick(DialogInterface dialog, int which) {
                 DataUtils.batchMoveToFolder(mContentResolver,
                         mNotesListAdapter.getSelectedItemIds(), adapter.getItemId(which));
@@ -490,14 +467,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         });
         builder.show();
     }
-
+ 
     private void createNewNote() {
         Intent intent = new Intent(this, NoteEditActivity.class);
         intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
         intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mCurrentFolderId);
         this.startActivityForResult(intent, REQUEST_CODE_NEW_NODE);
     }
-
+ 
     private void batchDelete() {
         new AsyncTask<Void, Void, HashSet<AppWidgetAttribute>>() {
             protected HashSet<AppWidgetAttribute> doInBackground(Void... unused) {
@@ -519,7 +496,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 }
                 return widgets;
             }
-
+ 
             @Override
             protected void onPostExecute(HashSet<AppWidgetAttribute> widgets) {
                 if (widgets != null) {
@@ -534,13 +511,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
         }.execute();
     }
-
+ 
     private void deleteFolder(long folderId) {
         if (folderId == Notes.ID_ROOT_FOLDER) {
             Log.e(TAG, "Wrong folder id, should not happen " + folderId);
             return;
         }
-
+ 
         HashSet<Long> ids = new HashSet<Long>();
         ids.add(folderId);
         HashSet<AppWidgetAttribute> widgets = DataUtils.getFolderNoteWidget(mContentResolver,
@@ -561,21 +538,20 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
         }
     }
-
+ 
     private void openNode(NoteItemData data) {
         Intent intent = new Intent(this, NoteEditActivity.class);
         intent.setAction(Intent.ACTION_VIEW);
         intent.putExtra(Intent.EXTRA_UID, data.getId());
         this.startActivityForResult(intent, REQUEST_CODE_OPEN_NODE);
     }
-
+ 
     private void openFolder(NoteItemData data) {
         mCurrentFolderId = data.getId();
         startAsyncNotesListQuery();
         if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
             mState = ListEditState.CALL_RECORD_FOLDER;
             mAddNewNote.setVisibility(View.GONE);
-            mMenuSet.setVisibility(View.GONE);
         } else {
             mState = ListEditState.SUB_FOLDER;
         }
@@ -586,7 +562,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
         mTitleBar.setVisibility(View.VISIBLE);
     }
-
+ 
     public void onClick(View v) {
         switch (v.getId()) {
             case R.id.btn_new_note:
@@ -596,19 +572,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 break;
         }
     }
-
+ 
     private void showSoftInput() {
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
         if (inputMethodManager != null) {
             inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
         }
     }
-
+ 
     private void hideSoftInput(View view) {
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
         inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
     }
-
+ 
     private void showCreateOrModifyFolderDialog(final boolean create) {
         final AlertDialog.Builder builder = new AlertDialog.Builder(this);
         View view = LayoutInflater.from(this).inflate(R.layout.dialog_edit_text, null);
@@ -626,14 +602,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             etName.setText("");
             builder.setTitle(this.getString(R.string.menu_create_folder));
         }
-
+ 
         builder.setPositiveButton(android.R.string.ok, null);
         builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
             public void onClick(DialogInterface dialog, int which) {
                 hideSoftInput(etName);
             }
         });
-
+ 
         final Dialog dialog = builder.setView(view).show();
         final Button positive = (Button)dialog.findViewById(android.R.id.button1);
         positive.setOnClickListener(new OnClickListener() {
@@ -666,7 +642,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 dialog.dismiss();
             }
         });
-
+ 
         if (TextUtils.isEmpty(etName.getText())) {
             positive.setEnabled(false);
         }
@@ -676,9 +652,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         etName.addTextChangedListener(new TextWatcher() {
             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                 // TODO Auto-generated method stub
-
+ 
             }
-
+ 
             public void onTextChanged(CharSequence s, int start, int before, int count) {
                 if (TextUtils.isEmpty(etName.getText())) {
                     positive.setEnabled(false);
@@ -686,19 +662,20 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     positive.setEnabled(true);
                 }
             }
-
+ 
             public void afterTextChanged(Editable s) {
                 // TODO Auto-generated method stub
-
+ 
             }
         });
     }
-
+ 
+    /* (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() {
-
-    	System.out.println("-------onBackPressed---00000");
-        switch (mState) {
+    public void onBackPressed() { switch (mState) {
             case SUB_FOLDER:
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
                 mState = ListEditState.NOTE_LIST;
@@ -709,19 +686,22 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
                 mState = ListEditState.NOTE_LIST;
                 mAddNewNote.setVisibility(View.VISIBLE);
-                mMenuSet.setVisibility(View.VISIBLE);
                 mTitleBar.setVisibility(View.GONE);
                 startAsyncNotesListQuery();
                 break;
             case NOTE_LIST:
-            	System.out.println("-------onBackPressed---");
                 super.onBackPressed();
                 break;
             default:
                 break;
         }
     }
-
+ 
+    /**
+     * @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) {
@@ -732,15 +712,18 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             Log.e(TAG, "Unspported widget type");
             return;
         }
-
+ 
         intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
             appWidgetId
         });
-
+ 
         sendBroadcast(intent);
         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) {
@@ -751,7 +734,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
         }
     };
-
+ 
     @Override
     public void onContextMenuClosed(Menu menu) {
         if (mNotesListView != null) {
@@ -759,7 +742,11 @@ 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) {
@@ -768,10 +755,10 @@ 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));
@@ -782,7 +769,7 @@ 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);
@@ -790,10 +777,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             default:
                 break;
         }
-
+ 
         return true;
     }
-
+ 
     @Override
     public boolean onPrepareOptionsMenu(Menu menu) {
         menu.clear();
@@ -811,7 +798,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
         return true;
     }
-
+ 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
@@ -851,22 +838,29 @@ 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>() {
-
+ 
             @Override
             protected Integer doInBackground(Void... unused) {
                 return backup.exportToText();
             }
-
+ 
             @Override
             protected void onPostExecute(Integer result) {
                 if (result == BackupUtils.STATE_SD_CARD_UNMOUONTED) {
@@ -896,22 +890,33 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     builder.show();
                 }
             }
-
+ 
         }.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) {
             if (view instanceof NotesListItem) {
                 NoteItemData item = ((NotesListItem) view).getItemData();
@@ -923,7 +928,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     }
                     return;
                 }
-
+ 
                 switch (mState) {
                     case NOTE_LIST:
                         if (item.getType() == Notes.TYPE_FOLDER
@@ -948,14 +953,17 @@ 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:
             "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")";
-
+ 
         mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN,
                 null,
                 Notes.CONTENT_NOTE_URI,
@@ -968,7 +976,13 @@ 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();
@@ -985,8 +999,4 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
         return false;
     }
-    
-    public void OnOpenMenu(View view) {
-		openOptionsMenu();
-	}
-}
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListAdapter.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListAdapter.java
index 51c9cb9..ea7f9f9 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListAdapter.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListAdapter.java
@@ -1,85 +1,109 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.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;
 import java.util.HashMap;
 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 +111,47 @@ 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();
@@ -127,58 +168,90 @@ 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;
         }
         return mSelectedIndex.get(position);
     }
-
+ 
     @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
         }
-    }
-}
+    } 
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListItem.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListItem.java
index 1221e80..08a8017 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListItem.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesListItem.java
@@ -1,21 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
-
+ 
 import android.content.Context;
 import android.text.format.DateUtils;
 import android.view.View;
@@ -23,44 +7,50 @@ import android.widget.CheckBox;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
-
+ 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 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 +59,9 @@ 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 +69,7 @@ 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,
@@ -87,36 +78,39 @@ 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;
     }
-}
+}
\ No newline at end of file
diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java
index 07c5f7e..4ae4976 100644
--- a/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java
+++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java
@@ -1,21 +1,5 @@
-/*
- * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *        http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package net.micode.notes.ui;
-
+ 
 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.app.ActionBar;
@@ -41,108 +25,151 @@ import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
 import android.widget.Toast;
-
+ 
 import net.micode.notes.R;
 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;
                     }
                 }
             }
         }
-
+ 
         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();
@@ -150,22 +177,30 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                 return true;
             }
         });
-
+ 
+        //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 +208,67 @@ 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;
@@ -224,84 +276,120 @@ 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();
-
-            // clean up last sync time
+            //提交修改的数据
+ 
+            
             setLastSyncTime(this, 0);
-
+          //将最后同步时间清零
+ 
             // clean up local gtask related info
             new Thread(new Runnable() {
                 public void run() {
@@ -311,24 +399,34 @@ 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 +436,79 @@ 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;
         }
     }
 }
+ 
\ No newline at end of file