diff --git a/src/data/Contact.java b/src/data/Contact.java
index d97ac5d..f78cf70 100644
--- a/src/data/Contact.java
+++ b/src/data/Contact.java
@@ -25,28 +25,45 @@ import android.util.Log;
 
 import java.util.HashMap;
 
+/**
+ * 联系人工具类
+ * 用于根据电话号码获取联系人姓名，并提供缓存功能提高查询效率
+ */
 public class Contact {
+    // 联系人缓存，存储电话号码与联系人姓名的映射关系
     private static HashMap<String, String> sContactCache;
+    // 日志标签
     private static final String TAG = "Contact";
 
+    // 来电者ID查询条件
     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 "
+            + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+            + " AND " + Data.RAW_CONTACT_ID + " IN "
             + "(SELECT raw_contact_id "
             + " FROM phone_lookup"
             + " WHERE min_match = '+')";
 
+    /**
+     * 根据电话号码获取联系人姓名
+     * @param context 上下文对象
+     * @param phoneNumber 电话号码
+     * @return 联系人姓名，若未找到则返回null
+     */
     public static String getContact(Context context, String phoneNumber) {
+        // 初始化缓存
         if(sContactCache == null) {
             sContactCache = new HashMap<String, String>();
         }
 
+        // 先从缓存中查找，若存在则直接返回
         if(sContactCache.containsKey(phoneNumber)) {
             return sContactCache.get(phoneNumber);
         }
 
+        // 构建查询条件，替换min_match的值
         String selection = CALLER_ID_SELECTION.replace("+",
                 PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
+        // 查询联系人数据
         Cursor cursor = context.getContentResolver().query(
                 Data.CONTENT_URI,
                 new String [] { Phone.DISPLAY_NAME },
@@ -54,15 +71,18 @@ public class Contact {
                 new String[] { phoneNumber },
                 null);
 
+        // 处理查询结果
         if (cursor != null && cursor.moveToFirst()) {
             try {
                 String name = cursor.getString(0);
+                // 将结果存入缓存
                 sContactCache.put(phoneNumber, name);
                 return name;
             } catch (IndexOutOfBoundsException e) {
                 Log.e(TAG, " Cursor get string error " + e.toString());
                 return null;
             } finally {
+                // 关闭游标
                 cursor.close();
             }
         } else {
@@ -70,4 +90,4 @@ public class Contact {
             return null;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/data/Notes.java b/src/data/Notes.java
index f240604..1471ca3 100644
--- a/src/data/Notes.java
+++ b/src/data/Notes.java
@@ -17,263 +17,279 @@
 package net.micode.notes.data;
 
 import android.net.Uri;
+
+/**
+ * 笔记相关常量和数据结构定义类
+ * 包含笔记的类型、系统文件夹ID、Uri等常量定义，以及笔记和数据的列定义
+ */
 public class Notes {
+    // 内容提供者的授权者
     public static final String AUTHORITY = "micode_notes";
+    // 日志标签
     public static final String TAG = "Notes";
-    public static final int TYPE_NOTE     = 0;
-    public static final int TYPE_FOLDER   = 1;
-    public static final int TYPE_SYSTEM   = 2;
+    // 笔记类型常量
+    public static final int TYPE_NOTE     = 0;         // 普通笔记类型
+    public static final int TYPE_FOLDER   = 1;         // 文件夹类型
+    public static final int TYPE_SYSTEM   = 2;         // 系统类型
 
     /**
-     * Following IDs are system folders' identifiers
-     * {@link Notes#ID_ROOT_FOLDER } is default folder
-     * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
-     * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
+     * 以下是系统文件夹的标识符
+     * {@link Notes#ID_ROOT_FOLDER } 是默认文件夹
+     * {@link Notes#ID_TEMPARAY_FOLDER } 是用于存放不属于任何文件夹的笔记
+     * {@link Notes#ID_CALL_RECORD_FOLDER} 是用于存储通话记录
      */
-    public static final int ID_ROOT_FOLDER = 0;
-    public static final int ID_TEMPARAY_FOLDER = -1;
-    public static final int ID_CALL_RECORD_FOLDER = -2;
-    public static final int ID_TRASH_FOLER = -3;
-
-    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;
+    // 系统文件夹ID常量
+    public static final int ID_ROOT_FOLDER = 0;                // 根文件夹
+    public static final int ID_TEMPARAY_FOLDER = -1;            // 临时文件夹
+    public static final int ID_CALL_RECORD_FOLDER = -2;         // 通话记录文件夹
+    public static final int ID_TRASH_FOLER = -3;                // 回收站文件夹
+
+    // Intent额外数据常量
+    public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";              // 提醒日期
+    public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";  // 背景颜色ID
+    public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";                // 小组件ID
+    public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";            // 小组件类型
+    public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";                // 文件夹ID
+    public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";                // 通话日期
+
+    // 小组件类型常量
+    public static final int TYPE_WIDGET_INVALIDE      = -1;     // 无效小组件
+    public static final int TYPE_WIDGET_2X            = 0;      // 2X大小的小组件
+    public static final int TYPE_WIDGET_4X            = 1;      // 4X大小的小组件
 
+    /**
+     * 数据类型常量类
+     */
     public static class DataConstants {
-        public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
-        public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
+        public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;         // 文本笔记类型
+        public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;    // 通话笔记类型
     }
 
     /**
-     * Uri to query all notes and folders
+     * 查询所有笔记和文件夹的Uri
      */
     public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
 
     /**
-     * Uri to query data
+     * 查询数据的Uri
      */
     public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
 
+    /**
+     * 笔记表的列定义接口
+     */
     public interface NoteColumns {
         /**
-         * The unique ID for a row
-         * <P> Type: INTEGER (long) </P>
+         * 行的唯一ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ID = "_id";
 
         /**
-         * The parent's id for note or folder
-         * <P> Type: INTEGER (long) </P>
+         * 笔记或文件夹的父级ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String PARENT_ID = "parent_id";
 
         /**
-         * Created data for note or folder
-         * <P> Type: INTEGER (long) </P>
+         * 笔记或文件夹的创建时间
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String CREATED_DATE = "created_date";
 
         /**
-         * Latest modified date
-         * <P> Type: INTEGER (long) </P>
+         * 最近修改时间
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String MODIFIED_DATE = "modified_date";
 
 
         /**
-         * Alert date
-         * <P> Type: INTEGER (long) </P>
+         * 提醒时间
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ALERTED_DATE = "alert_date";
 
         /**
-         * Folder's name or text content of note
-         * <P> Type: TEXT </P>
+         * 文件夹名称或笔记文本内容
+         * <P> 类型: TEXT </P>
          */
         public static final String SNIPPET = "snippet";
 
         /**
-         * Note's widget id
-         * <P> Type: INTEGER (long) </P>
+         * 笔记的小组件ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String WIDGET_ID = "widget_id";
 
         /**
-         * Note's widget type
-         * <P> Type: INTEGER (long) </P>
+         * 笔记的小组件类型
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String WIDGET_TYPE = "widget_type";
 
         /**
-         * Note's background color's id
-         * <P> Type: INTEGER (long) </P>
+         * 笔记的背景颜色ID
+         * <P> 类型: 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>
+         * 对于文本笔记，没有附件；对于多媒体笔记，至少有一个附件
+         * <P> 类型: INTEGER </P>
          */
         public static final String HAS_ATTACHMENT = "has_attachment";
 
         /**
-         * Folder's count of notes
-         * <P> Type: INTEGER (long) </P>
+         * 文件夹中的笔记数量
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String NOTES_COUNT = "notes_count";
 
         /**
-         * The file type: folder or note
-         * <P> Type: INTEGER </P>
+         * 文件类型：文件夹或笔记
+         * <P> 类型: INTEGER </P>
          */
         public static final String TYPE = "type";
 
         /**
-         * The last sync id
-         * <P> Type: INTEGER (long) </P>
+         * 最后同步ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String SYNC_ID = "sync_id";
 
         /**
-         * Sign to indicate local modified or not
-         * <P> Type: INTEGER </P>
+         * 本地是否修改的标志
+         * <P> 类型: INTEGER </P>
          */
         public static final String LOCAL_MODIFIED = "local_modified";
 
         /**
-         * Original parent id before moving into temporary folder
-         * <P> Type : INTEGER </P>
+         * 移动到临时文件夹之前的原始父级ID
+         * <P> 类型 : INTEGER </P>
          */
         public static final String ORIGIN_PARENT_ID = "origin_parent_id";
 
         /**
-         * The gtask id
-         * <P> Type : TEXT </P>
+         * gtask ID
+         * <P> 类型 : TEXT </P>
          */
         public static final String GTASK_ID = "gtask_id";
 
         /**
-         * The version code
-         * <P> Type : INTEGER (long) </P>
+         * 版本号
+         * <P> 类型 : INTEGER (long) </P>
          */
         public static final String VERSION = "version";
     }
 
+    /**
+     * 数据表的列定义接口
+     */
     public interface DataColumns {
         /**
-         * The unique ID for a row
-         * <P> Type: INTEGER (long) </P>
+         * 行的唯一ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String ID = "_id";
 
         /**
-         * The MIME type of the item represented by this row.
-         * <P> Type: Text </P>
+         * 此行所代表项目的MIME类型
+         * <P> 类型: 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>
+         * 此数据所属笔记的引用ID
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String NOTE_ID = "note_id";
 
         /**
-         * Created data for note or folder
-         * <P> Type: INTEGER (long) </P>
+         * 笔记或文件夹的创建时间
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String CREATED_DATE = "created_date";
 
         /**
-         * Latest modified date
-         * <P> Type: INTEGER (long) </P>
+         * 最近修改时间
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String MODIFIED_DATE = "modified_date";
 
         /**
-         * Data's content
-         * <P> Type: TEXT </P>
+         * 数据内容
+         * <P> 类型: TEXT </P>
          */
         public static final String CONTENT = "content";
 
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * integer data type
-         * <P> Type: INTEGER </P>
+         * 通用数据列，用于整数数据类型
+         * <P> 类型: INTEGER </P>
          */
         public static final String DATA1 = "data1";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * integer data type
-         * <P> Type: INTEGER </P>
+         * 通用数据列，用于整数数据类型
+         * <P> 类型: INTEGER </P>
          */
         public static final String DATA2 = "data2";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * TEXT data type
-         * <P> Type: TEXT </P>
+         * 通用数据列，用于文本数据类型
+         * <P> 类型: TEXT </P>
          */
         public static final String DATA3 = "data3";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * TEXT data type
-         * <P> Type: TEXT </P>
+         * 通用数据列，用于文本数据类型
+         * <P> 类型: TEXT </P>
          */
         public static final String DATA4 = "data4";
 
         /**
-         * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
-         * TEXT data type
-         * <P> Type: TEXT </P>
+         * 通用数据列，用于文本数据类型
+         * <P> 类型: TEXT </P>
          */
         public static final String DATA5 = "data5";
     }
 
+    /**
+     * 文本笔记类，实现DataColumns接口
+     */
     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>
+         * 指示文本是否为 checklist 模式的标志
+         * <P> 类型: Integer 1:check list模式 0:普通模式 </P>
          */
         public static final String MODE = DATA1;
 
-        public static final int MODE_CHECK_LIST = 1;
-
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
-
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+        public static final int MODE_CHECK_LIST = 1;  // checklist模式
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";  // 文本笔记集合的MIME类型
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";  // 单个文本笔记的MIME类型
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");  // 文本笔记的Uri
     }
 
+    /**
+     * 通话笔记类，实现DataColumns接口
+     */
     public static final class CallNote implements DataColumns {
         /**
-         * Call date for this record
-         * <P> Type: INTEGER (long) </P>
+         * 此记录的通话日期
+         * <P> 类型: INTEGER (long) </P>
          */
         public static final String CALL_DATE = DATA1;
 
         /**
-         * Phone number for this record
-         * <P> Type: TEXT </P>
+         * 此记录的电话号码
+         * <P> 类型: TEXT </P>
          */
         public static final String PHONE_NUMBER = DATA3;
 
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
-
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
-
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";  // 通话笔记集合的MIME类型
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";  // 单个通话笔记的MIME类型
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");  // 通话笔记的Uri
     }
-}
+}
\ No newline at end of file
diff --git a/src/data/NotesDatabaseHelper.java b/src/data/NotesDatabaseHelper.java
index ffe5d57..b1a3f93 100644
--- a/src/data/NotesDatabaseHelper.java
+++ b/src/data/NotesDatabaseHelper.java
@@ -26,190 +26,209 @@ import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.DataConstants;
 import net.micode.notes.data.Notes.NoteColumns;
 
-
+/**
+ * 笔记数据库帮助类，继承自SQLiteOpenHelper
+ * 负责数据库的创建、升级以及表和触发器的管理
+ */
 public class NotesDatabaseHelper extends SQLiteOpenHelper {
+    // 数据库名称
     private static final String DB_NAME = "note.db";
-
+    // 数据库版本
     private static final int DB_VERSION = 4;
 
+    /**
+     * 表名常量接口
+     */
     public interface TABLE {
-        public static final String NOTE = "note";
-
-        public static final String DATA = "data";
+        public static final String NOTE = "note";  // 笔记表
+        public static final String DATA = "data";  // 数据表
     }
 
+    // 日志标签
     private static final String TAG = "NotesDatabaseHelper";
 
+    // 单例实例
     private static NotesDatabaseHelper mInstance;
 
+    // 创建笔记表的SQL语句
     private static final String CREATE_NOTE_TABLE_SQL =
-        "CREATE TABLE " + TABLE.NOTE + "(" +
-            NoteColumns.ID + " INTEGER PRIMARY KEY," +
-            NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
-            NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
-            NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
-            NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
-        ")";
-
+            "CREATE TABLE " + TABLE.NOTE + "(" +
+                    NoteColumns.ID + " INTEGER PRIMARY KEY," +
+                    NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
+                    NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
+                    NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
+                    NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
+                    ")";
+
+    // 创建数据表的SQL语句
     private static final String CREATE_DATA_TABLE_SQL =
-        "CREATE TABLE " + TABLE.DATA + "(" +
-            DataColumns.ID + " INTEGER PRIMARY KEY," +
-            DataColumns.MIME_TYPE + " TEXT NOT NULL," +
-            DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
-            NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
-            DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
-            DataColumns.DATA1 + " INTEGER," +
-            DataColumns.DATA2 + " INTEGER," +
-            DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
-            DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
-            DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
-        ")";
-
+            "CREATE TABLE " + TABLE.DATA + "(" +
+                    DataColumns.ID + " INTEGER PRIMARY KEY," +
+                    DataColumns.MIME_TYPE + " TEXT NOT NULL," +
+                    DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
+                    NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
+                    DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA1 + " INTEGER," +
+                    DataColumns.DATA2 + " INTEGER," +
+                    DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
+                    DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
+                    ")";
+
+    // 为data表的note_id列创建索引的SQL语句
     private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
-        "CREATE INDEX IF NOT EXISTS note_id_index ON " +
-        TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
+            "CREATE INDEX IF NOT EXISTS note_id_index ON " +
+                    TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
 
     /**
-     * Increase folder's note count when move note to the folder
+     * 当将笔记移动到文件夹时，增加文件夹的笔记计数
      */
     private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
-        "CREATE TRIGGER increase_folder_count_on_update "+
-        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
-        " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
-        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
-        " END";
+            "CREATE TRIGGER increase_folder_count_on_update "+
+                    " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+                    "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+                    " END";
 
     /**
-     * Decrease folder's note count when move note from folder
+     * 当将笔记从文件夹中移出时，减少文件夹的笔记计数
      */
     private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
-        "CREATE TRIGGER decrease_folder_count_on_update " +
-        " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
-        " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
-        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
-        "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
-        " END";
+            "CREATE TRIGGER decrease_folder_count_on_update " +
+                    " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+                    "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+                    "  AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
+                    " END";
 
     /**
-     * Increase folder's note count when insert new note to the folder
+     * 当向文件夹中插入新笔记时，增加文件夹的笔记计数
      */
     private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
-        "CREATE TRIGGER increase_folder_count_on_insert " +
-        " AFTER INSERT ON " + TABLE.NOTE +
-        " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
-        "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
-        " END";
+            "CREATE TRIGGER increase_folder_count_on_insert " +
+                    " AFTER INSERT ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
+                    "  WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
+                    " END";
 
     /**
-     * Decrease folder's note count when delete note from the folder
+     * 当从文件夹中删除笔记时，减少文件夹的笔记计数
      */
     private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER decrease_folder_count_on_delete " +
-        " AFTER DELETE ON " + TABLE.NOTE +
-        " BEGIN " +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
-        "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
-        "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
-        " END";
+            "CREATE TRIGGER decrease_folder_count_on_delete " +
+                    " AFTER DELETE ON " + TABLE.NOTE +
+                    " BEGIN " +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
+                    "  WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
+                    "  AND " + NoteColumns.NOTES_COUNT + ">0;" +
+                    " END";
 
     /**
-     * Update note's content when insert data with type {@link DataConstants#NOTE}
+     * 当插入类型为{@link DataConstants#NOTE}的数据时，更新笔记内容
      */
     private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
-        "CREATE TRIGGER update_note_content_on_insert " +
-        " AFTER INSERT ON " + TABLE.DATA +
-        " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
-        " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
-        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+            "CREATE TRIGGER update_note_content_on_insert " +
+                    " AFTER INSERT ON " + TABLE.DATA +
+                    " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+                    "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+                    " END";
 
     /**
-     * Update note's content when data with {@link DataConstants#NOTE} type has changed
+     * 当类型为{@link DataConstants#NOTE}的数据发生变化时，更新笔记内容
      */
     private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
-        "CREATE TRIGGER update_note_content_on_update " +
-        " AFTER UPDATE ON " + TABLE.DATA +
-        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
-        " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
-        "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
-        " END";
+            "CREATE TRIGGER update_note_content_on_update " +
+                    " AFTER UPDATE ON " + TABLE.DATA +
+                    " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
+                    "  WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
+                    " END";
 
     /**
-     * Update note's content when data with {@link DataConstants#NOTE} type has deleted
+     * 当类型为{@link DataConstants#NOTE}的数据被删除时，更新笔记内容
      */
     private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER update_note_content_on_delete " +
-        " AFTER delete ON " + TABLE.DATA +
-        " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
-        " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.SNIPPET + "=''" +
-        "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
-        " END";
+            "CREATE TRIGGER update_note_content_on_delete " +
+                    " AFTER delete ON " + TABLE.DATA +
+                    " WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.SNIPPET + "=''" +
+                    "  WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
+                    " END";
 
     /**
-     * Delete datas belong to note which has been deleted
+     * 当笔记被删除时，删除其所属的数据
      */
     private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER delete_data_on_delete " +
-        " AFTER DELETE ON " + TABLE.NOTE +
-        " BEGIN" +
-        "  DELETE FROM " + TABLE.DATA +
-        "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+            "CREATE TRIGGER delete_data_on_delete " +
+                    " AFTER DELETE ON " + TABLE.NOTE +
+                    " BEGIN" +
+                    "  DELETE FROM " + TABLE.DATA +
+                    "   WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
+                    " END";
 
     /**
-     * Delete notes belong to folder which has been deleted
+     * 当文件夹被删除时，删除其包含的笔记
      */
     private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
-        "CREATE TRIGGER folder_delete_notes_on_delete " +
-        " AFTER DELETE ON " + TABLE.NOTE +
-        " BEGIN" +
-        "  DELETE FROM " + TABLE.NOTE +
-        "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+            "CREATE TRIGGER folder_delete_notes_on_delete " +
+                    " AFTER DELETE ON " + TABLE.NOTE +
+                    " BEGIN" +
+                    "  DELETE FROM " + TABLE.NOTE +
+                    "   WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+                    " END";
 
     /**
-     * Move notes belong to folder which has been moved to trash folder
+     * 当文件夹被移到回收站时，移动其包含的笔记到回收站
      */
     private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
-        "CREATE TRIGGER folder_move_notes_on_trash " +
-        " AFTER UPDATE ON " + TABLE.NOTE +
-        " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
-        " BEGIN" +
-        "  UPDATE " + TABLE.NOTE +
-        "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
-        "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
-        " END";
+            "CREATE TRIGGER folder_move_notes_on_trash " +
+                    " AFTER UPDATE ON " + TABLE.NOTE +
+                    " WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+                    " BEGIN" +
+                    "  UPDATE " + TABLE.NOTE +
+                    "   SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
+                    "  WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
+                    " END";
 
+    /**
+     * 构造方法
+     * @param context 上下文对象
+     */
     public NotesDatabaseHelper(Context context) {
         super(context, DB_NAME, null, DB_VERSION);
     }
 
+    /**
+     * 创建笔记表
+     * @param db 数据库实例
+     */
     public void createNoteTable(SQLiteDatabase db) {
         db.execSQL(CREATE_NOTE_TABLE_SQL);
         reCreateNoteTableTriggers(db);
@@ -217,6 +236,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         Log.d(TAG, "note table has been created");
     }
 
+    /**
+     * 重新创建笔记表的触发器
+     * @param db 数据库实例
+     */
     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");
@@ -235,18 +258,22 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
     }
 
+    /**
+     * 创建系统文件夹
+     * @param db 数据库实例
+     */
     private void createSystemFolder(SQLiteDatabase db) {
         ContentValues values = new ContentValues();
 
         /**
-         * call record foler for call notes
+         * 用于存储通话笔记的通话记录文件夹
          */
         values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
 
         /**
-         * root folder which is default folder
+         * 作为默认文件夹的根文件夹
          */
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
@@ -254,7 +281,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.insert(TABLE.NOTE, null, values);
 
         /**
-         * temporary folder which is used for moving note
+         * 用于移动笔记的临时文件夹
          */
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
@@ -262,7 +289,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.insert(TABLE.NOTE, null, values);
 
         /**
-         * create trash folder
+         * 创建回收站文件夹
          */
         values.clear();
         values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
@@ -270,6 +297,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.insert(TABLE.NOTE, null, values);
     }
 
+    /**
+     * 创建数据表
+     * @param db 数据库实例
+     */
     public void createDataTable(SQLiteDatabase db) {
         db.execSQL(CREATE_DATA_TABLE_SQL);
         reCreateDataTableTriggers(db);
@@ -277,6 +308,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         Log.d(TAG, "data table has been created");
     }
 
+    /**
+     * 重新创建数据表的触发器
+     * @param db 数据库实例
+     */
     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");
@@ -287,6 +322,11 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
     }
 
+    /**
+     * 获取单例实例
+     * @param context 上下文对象
+     * @return NotesDatabaseHelper实例
+     */
     static synchronized NotesDatabaseHelper getInstance(Context context) {
         if (mInstance == null) {
             mInstance = new NotesDatabaseHelper(context);
@@ -294,12 +334,22 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         return mInstance;
     }
 
+    /**
+     * 数据库创建时调用，创建表和初始数据
+     * @param db 数据库实例
+     */
     @Override
     public void onCreate(SQLiteDatabase db) {
         createNoteTable(db);
         createDataTable(db);
     }
 
+    /**
+     * 数据库升级时调用
+     * @param db 数据库实例
+     * @param oldVersion 旧版本号
+     * @param newVersion 新版本号
+     */
     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
         boolean reCreateTriggers = false;
@@ -307,7 +357,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
 
         if (oldVersion == 1) {
             upgradeToV2(db);
-            skipV2 = true; // this upgrade including the upgrade from v2 to v3
+            skipV2 = true; // 此升级包含从v2到v3的升级
             oldVersion++;
         }
 
@@ -333,6 +383,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         }
     }
 
+    /**
+     * 升级数据库到版本2
+     * @param db 数据库实例
+     */
     private void upgradeToV2(SQLiteDatabase db) {
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
         db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
@@ -340,23 +394,31 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         createDataTable(db);
     }
 
+    /**
+     * 升级数据库到版本3
+     * @param db 数据库实例
+     */
     private void upgradeToV3(SQLiteDatabase db) {
-        // drop unused triggers
+        // 删除未使用的触发器
         db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
         db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
         db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
-        // add a column for gtask id
+        // 添加gtask id列
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
                 + " TEXT NOT NULL DEFAULT ''");
-        // add a trash system folder
+        // 添加回收站系统文件夹
         ContentValues values = new ContentValues();
         values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
         values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
         db.insert(TABLE.NOTE, null, values);
     }
 
+    /**
+     * 升级数据库到版本4
+     * @param db 数据库实例
+     */
     private void upgradeToV4(SQLiteDatabase db) {
         db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
                 + " INTEGER NOT NULL DEFAULT 0");
     }
-}
+}
\ No newline at end of file
diff --git a/src/data/NotesProvider.java b/src/data/NotesProvider.java
index edb0a60..84cbffd 100644
--- a/src/data/NotesProvider.java
+++ b/src/data/NotesProvider.java
@@ -16,7 +16,6 @@
 
 package net.micode.notes.data;
 
-
 import android.app.SearchManager;
 import android.content.ContentProvider;
 import android.content.ContentUris;
@@ -34,22 +33,29 @@ import net.micode.notes.data.Notes.DataColumns;
 import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.NotesDatabaseHelper.TABLE;
 
-
+/**
+ * 笔记内容提供者，继承自ContentProvider
+ * 负责处理笔记数据的CRUD操作，通过ContentProvider对外提供数据访问接口
+ */
 public class NotesProvider extends ContentProvider {
+    // Uri匹配器，用于匹配不同的Uri请求
     private static final UriMatcher mMatcher;
 
+    // 数据库帮助类实例
     private NotesDatabaseHelper mHelper;
 
+    // 日志标签
     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;
+    // Uri匹配器对应的匹配码
+    private static final int URI_NOTE            = 1;         // 匹配note集合的Uri
+    private static final int URI_NOTE_ITEM       = 2;         // 匹配单个note的Uri
+    private static final int URI_DATA            = 3;         // 匹配data集合的Uri
+    private static final int URI_DATA_ITEM       = 4;         // 匹配单个data的Uri
+    private static final int URI_SEARCH          = 5;         // 匹配搜索的Uri
+    private static final int URI_SEARCH_SUGGEST  = 6;         // 匹配搜索建议的Uri
 
+    // 静态代码块，初始化UriMatcher并添加Uri匹配规则
     static {
         mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
         mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE);
@@ -62,56 +68,77 @@ public class NotesProvider extends ContentProvider {
     }
 
     /**
-     * x'0A' represents the '\n' character in sqlite. For title and content in the search result,
-     * we will trim '\n' and white space in order to show more information.
+     * x'0A'代表sqlite中的'\n'字符。对于搜索结果中的标题和内容，
+     * 我们将去除'\n'和空白字符以显示更多信息。
      */
+    // 笔记搜索的投影列，定义了搜索结果需要返回的列
     private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
-        + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
-        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
-        + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
-        + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
-        + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
-        + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
+            + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + ","
+            + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + ","
+            + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + ","
+            + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + ","
+            + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA;
 
+    // 笔记片段搜索查询语句
     private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
-        + " FROM " + TABLE.NOTE
-        + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
-        + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
-        + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
+            + " FROM " + TABLE.NOTE
+            + " WHERE " + NoteColumns.SNIPPET + " LIKE ?"
+            + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+            + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
 
+    /**
+     * 初始化ContentProvider，获取数据库帮助类实例
+     * @return 初始化成功返回true
+     */
     @Override
     public boolean onCreate() {
         mHelper = NotesDatabaseHelper.getInstance(getContext());
         return true;
     }
 
+    /**
+     * 处理查询请求
+     * @param uri 查询的Uri
+     * @param projection 需要返回的列
+     * @param selection 查询条件
+     * @param selectionArgs 查询条件参数
+     * @param sortOrder 排序方式
+     * @return 查询结果的Cursor
+     */
     @Override
     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
-            String sortOrder) {
+                        String sortOrder) {
         Cursor c = null;
         SQLiteDatabase db = mHelper.getReadableDatabase();
         String id = null;
+        // 根据Uri匹配结果执行不同的查询操作
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 查询note表的所有数据
                 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                         sortOrder);
                 break;
             case URI_NOTE_ITEM:
+                // 查询note表中指定id的数据
                 id = uri.getPathSegments().get(1);
                 c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs, null, null, sortOrder);
                 break;
             case URI_DATA:
+                // 查询data表的所有数据
                 c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
                         sortOrder);
                 break;
             case URI_DATA_ITEM:
+                // 查询data表中指定id的数据
                 id = uri.getPathSegments().get(1);
                 c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs, null, null, sortOrder);
                 break;
             case URI_SEARCH:
             case URI_SEARCH_SUGGEST:
+                // 处理搜索和搜索建议查询
                 if (sortOrder != null || projection != null) {
                     throw new IllegalArgumentException(
                             "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
@@ -131,6 +158,7 @@ public class NotesProvider extends ContentProvider {
                 }
 
                 try {
+                    // 构建模糊查询字符串
                     searchString = String.format("%%%s%%", searchString);
                     c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
                             new String[] { searchString });
@@ -141,21 +169,31 @@ public class NotesProvider extends ContentProvider {
             default:
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
+        // 设置通知Uri，当数据变化时通知观察者
         if (c != null) {
             c.setNotificationUri(getContext().getContentResolver(), uri);
         }
         return c;
     }
 
+    /**
+     * 处理插入请求
+     * @param uri 插入的Uri
+     * @param values 要插入的数据
+     * @return 插入数据的Uri
+     */
     @Override
     public Uri insert(Uri uri, ContentValues values) {
         SQLiteDatabase db = mHelper.getWritableDatabase();
         long dataId = 0, noteId = 0, insertedId = 0;
+        // 根据Uri匹配结果执行不同的插入操作
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 插入数据到note表
                 insertedId = noteId = db.insert(TABLE.NOTE, null, values);
                 break;
             case URI_DATA:
+                // 插入数据到data表
                 if (values.containsKey(DataColumns.NOTE_ID)) {
                     noteId = values.getAsLong(DataColumns.NOTE_ID);
                 } else {
@@ -166,13 +204,12 @@ public class NotesProvider extends ContentProvider {
             default:
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
-        // Notify the note uri
+        // 通知数据变化
         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);
@@ -181,22 +218,31 @@ public class NotesProvider extends ContentProvider {
         return ContentUris.withAppendedId(uri, insertedId);
     }
 
+    /**
+     * 处理删除请求
+     * @param uri 删除的Uri
+     * @param selection 删除条件
+     * @param selectionArgs 删除条件参数
+     * @return 被删除的行数
+     */
     @Override
     public int delete(Uri uri, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean deleteData = false;
+        // 根据Uri匹配结果执行不同的删除操作
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 删除note表中的数据
                 selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
                 count = db.delete(TABLE.NOTE, selection, selectionArgs);
                 break;
             case URI_NOTE_ITEM:
+                // 删除note表中指定id的数据
                 id = uri.getPathSegments().get(1);
                 /**
-                 * ID that smaller than 0 is system folder which is not allowed to
-                 * trash
+                 * 小于0的ID是系统文件夹，不允许删除
                  */
                 long noteId = Long.valueOf(id);
                 if (noteId <= 0) {
@@ -206,10 +252,12 @@ public class NotesProvider extends ContentProvider {
                         NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
                 break;
             case URI_DATA:
+                // 删除data表中的数据
                 count = db.delete(TABLE.DATA, selection, selectionArgs);
                 deleteData = true;
                 break;
             case URI_DATA_ITEM:
+                // 删除data表中指定id的数据
                 id = uri.getPathSegments().get(1);
                 count = db.delete(TABLE.DATA,
                         DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
@@ -218,6 +266,7 @@ public class NotesProvider extends ContentProvider {
             default:
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
+        // 通知数据变化
         if (count > 0) {
             if (deleteData) {
                 getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
@@ -227,28 +276,41 @@ public class NotesProvider extends ContentProvider {
         return count;
     }
 
+    /**
+     * 处理更新请求
+     * @param uri 更新的Uri
+     * @param values 要更新的数据
+     * @param selection 更新条件
+     * @param selectionArgs 更新条件参数
+     * @return 被更新的行数
+     */
     @Override
     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
         int count = 0;
         String id = null;
         SQLiteDatabase db = mHelper.getWritableDatabase();
         boolean updateData = false;
+        // 根据Uri匹配结果执行不同的更新操作
         switch (mMatcher.match(uri)) {
             case URI_NOTE:
+                // 更新note表中的数据，先增加笔记版本号
                 increaseNoteVersion(-1, selection, selectionArgs);
                 count = db.update(TABLE.NOTE, values, selection, selectionArgs);
                 break;
             case URI_NOTE_ITEM:
+                // 更新note表中指定id的数据，先增加笔记版本号
                 id = uri.getPathSegments().get(1);
                 increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
                 count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs);
                 break;
             case URI_DATA:
+                // 更新data表中的数据
                 count = db.update(TABLE.DATA, values, selection, selectionArgs);
                 updateData = true;
                 break;
             case URI_DATA_ITEM:
+                // 更新data表中指定id的数据
                 id = uri.getPathSegments().get(1);
                 count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
                         + parseSelection(selection), selectionArgs);
@@ -258,6 +320,7 @@ public class NotesProvider extends ContentProvider {
                 throw new IllegalArgumentException("Unknown URI " + uri);
         }
 
+        // 通知数据变化
         if (count > 0) {
             if (updateData) {
                 getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
@@ -267,10 +330,21 @@ public class NotesProvider extends ContentProvider {
         return count;
     }
 
+    /**
+     * 解析查询条件，将额外的查询条件添加到已有条件中
+     * @param selection 原查询条件
+     * @return 解析后的查询条件
+     */
     private String parseSelection(String selection) {
         return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
     }
 
+    /**
+     * 增加笔记的版本号
+     * @param id 笔记id，-1表示更新符合条件的所有笔记
+     * @param selection 更新条件
+     * @param selectionArgs 更新条件参数
+     */
     private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
         StringBuilder sql = new StringBuilder(120);
         sql.append("UPDATE ");
@@ -296,10 +370,15 @@ public class NotesProvider extends ContentProvider {
         mHelper.getWritableDatabase().execSQL(sql.toString());
     }
 
+    /**
+     * 获取Uri对应的MIME类型
+     * @param uri 要获取MIME类型的Uri
+     * @return MIME类型，此处未实现
+     */
     @Override
     public String getType(Uri uri) {
         // TODO Auto-generated method stub
         return null;
     }
 
-}
+}
\ No newline at end of file
diff --git a/src/gtask/remote/GTaskASyncTask.java b/src/gtask/remote/GTaskASyncTask.java
index b3b61e7..3679b5d 100644
--- a/src/gtask/remote/GTaskASyncTask.java
+++ b/src/gtask/remote/GTaskASyncTask.java
@@ -63,24 +63,44 @@ public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
         });
     }
 
-    private void showNotification(int tickerId, String content) {
-        Notification notification = new Notification(R.drawable.notification, mContext
-                .getString(tickerId), System.currentTimeMillis());
-        notification.defaults = Notification.DEFAULT_LIGHTS;
-        notification.flags = Notification.FLAG_AUTO_CANCEL;
-        PendingIntent pendingIntent;
-        if (tickerId != R.string.ticker_success) {
-            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
-                    NotesPreferenceActivity.class), 0);
-
-        } else {
-            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
-                    NotesListActivity.class), 0);
-        }
-        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
-                pendingIntent);
-        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+//    private void showNotification(int tickerId, String content) {
+//        Notification notification = new Notification(R.drawable.notification, mContext
+//                .getString(tickerId), System.currentTimeMillis());
+//        notification.defaults = Notification.DEFAULT_LIGHTS;
+//        notification.flags = Notification.FLAG_AUTO_CANCEL;
+//        PendingIntent pendingIntent;
+//       if (tickerId != R.string.ticker_success) {
+//            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+//                   NotesPreferenceActivity.class), 0);
+//
+//        } else {
+//            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+//                    NotesListActivity.class), 0);
+//        }
+//        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
+//                pendingIntent);
+//        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+//    }
+private void showNotification(int tickerId, String content) {
+    PendingIntent pendingIntent;
+    if (tickerId != R.string.ticker_success) {
+        pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+                NotesPreferenceActivity.class), PendingIntent.FLAG_IMMUTABLE);
+    } else {
+        pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
+                NotesListActivity.class), PendingIntent.FLAG_IMMUTABLE);
     }
+    Notification.Builder builder = new Notification.Builder(mContext)
+            .setAutoCancel(true)
+            .setContentTitle(mContext.getString(R.string.app_name))
+            .setContentText(content)
+            .setContentIntent(pendingIntent)
+            .setWhen(System.currentTimeMillis())
+            .setOngoing(true);
+    Notification notification=builder.getNotification();
+    mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
+}
+
 
     @Override
     protected Integer doInBackground(Void... unused) {
diff --git a/src/tool/BackupUtils.java b/src/tool/BackupUtils.java
index 39f6ec4..e87f7c7 100644
--- a/src/tool/BackupUtils.java
+++ b/src/tool/BackupUtils.java
@@ -16,19 +16,20 @@
 
 package net.micode.notes.tool;
 
-import android.content.Context;
-import android.database.Cursor;
-import android.os.Environment;
-import android.text.TextUtils;
-import android.text.format.DateFormat;
-import android.util.Log;
-
-import net.micode.notes.R;
-import net.micode.notes.data.Notes;
-import net.micode.notes.data.Notes.DataColumns;
-import net.micode.notes.data.Notes.DataConstants;
-import net.micode.notes.data.Notes.NoteColumns;
-
+import android.content.Context;//Android提供的一个上下文对象，可以用于访问应用程序的资源和执行一些操作。
+import android.database.Cursor;//一个用于查询数据库结果集的接口，可以用于获取查询结果中的各个数据项。
+import android.os.Environment;//提供了访问系统环境的方法，例如获取外部存储路径。
+import android.text.TextUtils;//个包含各种字符串处理方法的工具类，例如判断字符串是否为空。
+import android.text.format.DateFormat;//提供了各种日期和时间格式化的方法。
+import android.util.Log;//Android提供的日志工具类，用于打印调试信息。
+
+import net.micode.notes.R;//应用程序的资源类，用于引用应用程序中的各种资源，如布局文件、图标、字符串等。
+import net.micode.notes.data.Notes;//一个自定义的Notes数据类，用于访问和操作备忘录的数据。
+import net.micode.notes.data.Notes.DataColumns;//Notes数据类中定义的备忘录数据列常量。
+import net.micode.notes.data.Notes.DataConstants;//Notes数据类中定义的备忘录数据常量。
+import net.micode.notes.data.Notes.NoteColumns;//Notes数据类中定义的备忘录笔记列常量。
+
+//用于文件操作，如创建文件、写入内容等。
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
@@ -43,6 +44,7 @@ public class BackupUtils {
 
     public static synchronized BackupUtils getInstance(Context context) {
         if (sInstance == null) {
+            //如果当前的备份不存在，则重新声明一个
             sInstance = new BackupUtils(context);
         }
         return sInstance;
@@ -51,25 +53,25 @@ public class BackupUtils {
     /**
      * Following states are signs to represents backup or restore
      * status
-     */
-    // Currently, the sdcard is not mounted
+     *///以下状态是表示备份或恢复状态的标志。
+    // Currently, the sdcard is not mounted SD卡没有被装到手机里
     public static final int STATE_SD_CARD_UNMOUONTED           = 0;
-    // The backup file not exist
+    // 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) {//函数初始化
         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());
     }
 
@@ -132,7 +134,7 @@ public class BackupUtils {
             mFileDirectory = "";
         }
 
-        private String getFormat(int id) {
+        private String getFormat(int id) {//获取文本的组成部分
             return TEXT_FORMAT[id];
         }
 
@@ -140,20 +142,20 @@ public class BackupUtils {
          * Export the folder identified by folder id to text
          */
         private void exportFolderToText(String folderId, PrintStream ps) {
-            // Query notes belong to this folder
+            // 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
+                            folderId
                     }, 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
+                        // Query data belong to this note 将文件导出到text
                         String noteId = notesCursor.getString(NOTE_COLUMN_ID);
                         exportNoteToText(noteId, ps);
                     } while (notesCursor.moveToNext());
@@ -168,15 +170,15 @@ public class BackupUtils {
         private void exportNoteToText(String noteId, PrintStream ps) {
             Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI,
                     DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] {
-                        noteId
+                            noteId
                     }, null);
 
-            if (dataCursor != null) {
+            if (dataCursor != null) {//利用光标来扫面内容，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);
                         if (DataConstants.CALL_NOTE.equals(mimeType)) {
-                            // Print phone number
+                            // Print phone number 判断是否为空字符
                             String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER);
                             long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE);
                             String location = dataCursor.getString(DATA_COLUMN_CONTENT);
@@ -218,7 +220,7 @@ public class BackupUtils {
         /**
          * Note will be exported as text which is user readable
          */
-        public int exportToText() {
+        public int exportToText() {//总函数，调用上面的exportFolder和exportNote
             if (!externalStorageAvailable()) {
                 Log.d(TAG, "Media was not mounted");
                 return STATE_SD_CARD_UNMOUONTED;
@@ -229,7 +231,7 @@ public class BackupUtils {
                 Log.e(TAG, "get print stream error");
                 return STATE_SYSTEM_ERROR;
             }
-            // First export folder and its notes
+            // First export folder and its notes  导出文件夹，就是导出里面包含的便签
             Cursor folderCursor = mContext.getContentResolver().query(
                     Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION,
@@ -257,7 +259,7 @@ public class BackupUtils {
                 folderCursor.close();
             }
 
-            // Export notes in root's folder
+            // Export notes in root's folder 将根目录里的便签导出
             Cursor noteCursor = mContext.getContentResolver().query(
                     Notes.CONTENT_NOTE_URI,
                     NOTE_PROJECTION,
@@ -297,7 +299,7 @@ public class BackupUtils {
             PrintStream ps = null;
             try {
                 FileOutputStream fos = new FileOutputStream(file);
-                ps = new PrintStream(fos);
+                ps = new PrintStream(fos);//将ps输出流输出到特定文件，目的是导出到文件，而不是直接输出
             } catch (FileNotFoundException e) {
                 e.printStackTrace();
                 return null;
@@ -314,9 +316,9 @@ public class BackupUtils {
      */
     private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) {
         StringBuilder sb = new StringBuilder();
-        sb.append(Environment.getExternalStorageDirectory());
-        sb.append(context.getString(filePathResId));
-        File filedir = new File(sb.toString());
+        sb.append(Environment.getExternalStorageDirectory());//外部的储存路径
+        sb.append(context.getString(filePathResId));//文件的储存路径
+        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),
@@ -325,7 +327,7 @@ public class BackupUtils {
 
         try {
             if (!filedir.exists()) {
-                filedir.mkdir();
+                filedir.mkdir();//如果文件不存在就新建文件
             }
             if (!file.exists()) {
                 file.createNewFile();
@@ -336,7 +338,7 @@ public class BackupUtils {
         } catch (IOException e) {
             e.printStackTrace();
         }
-
+        //try catch 异常处理
         return null;
     }
 }
diff --git a/src/tool/DataUtils.java b/src/tool/DataUtils.java
index 2a14982..1a2266e 100644
--- a/src/tool/DataUtils.java
+++ b/src/tool/DataUtils.java
@@ -34,44 +34,44 @@ import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;
 import java.util.ArrayList;
 import java.util.HashSet;
 
-
+//处理数据的转换和格式化
 public class DataUtils {
     public static final String TAG = "DataUtils";
-    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
-        if (ids == null) {
+    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {   //批量删除笔记
+        if (ids == null) {          //为空返回处理处理完成
             Log.d(TAG, "the ids is null");
             return true;
         }
-        if (ids.size() == 0) {
+        if (ids.size() == 0) {      //大小为零返回处理完成
             Log.d(TAG, "no id is in the hashset");
             return true;
         }
 
         ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
         for (long id : ids) {
-            if(id == Notes.ID_ROOT_FOLDER) {
+            if(id == Notes.ID_ROOT_FOLDER) {    //判断批量删除的文件是否是系统文件，如果是就继续
                 Log.e(TAG, "Don't delete system folder root");
                 continue;
             }
-            ContentProviderOperation.Builder builder = ContentProviderOperation
+            ContentProviderOperation.Builder builder = ContentProviderOperation     //创建欲删除对象
                     .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
-            operationList.add(builder.build());
+            operationList.add(builder.build()); //将欲删除对象批量加入操作列表
         }
-        try {
+        try {       //抛出异常
             ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
-            if (results == null || results.length == 0 || results[0] == null) {
-                Log.d(TAG, "delete notes failed, ids:" + ids.toString());
+            if (results == null || results.length == 0 || results[0] == null) { //发生错误
+                Log.d(TAG, "delete notes failed, ids:" + ids.toString());   //返回错误
                 return false;
             }
             return true;
-        } catch (RemoteException e) {
-            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+        } catch (RemoteException e) {   //捕捉异常
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));  //日志文件加入错误信息
         } catch (OperationApplicationException e) {
-            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));  //日志文件加入错误信息
         }
         return false;
     }
-
+    //将笔记放入文件夹中
     public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
         ContentValues values = new ContentValues();
         values.put(NoteColumns.PARENT_ID, desFolderId);
@@ -79,9 +79,9 @@ public class DataUtils {
         values.put(NoteColumns.LOCAL_MODIFIED, 1);
         resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
     }
-
+    //批量移动文件到文件夹中
     public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
-            long folderId) {
+                                            long folderId) {
         if (ids == null) {
             Log.d(TAG, "the ids is null");
             return true;
@@ -90,32 +90,32 @@ public class DataUtils {
         ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
         for (long id : ids) {
             ContentProviderOperation.Builder builder = ContentProviderOperation
-                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
+                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id)); //欲更新的操作者
             builder.withValue(NoteColumns.PARENT_ID, folderId);
             builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
-            operationList.add(builder.build());
+            operationList.add(builder.build()); //将欲更新的操作者加入操作列表
         }
 
         try {
             ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
             if (results == null || results.length == 0 || results[0] == null) {
-                Log.d(TAG, "delete notes failed, ids:" + ids.toString());
+                Log.d(TAG, "delete notes failed, ids:" + ids.toString());       //删除失败
                 return false;
             }
             return true;
         } catch (RemoteException e) {
-            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage())); //日志文件加入错误信息
         } catch (OperationApplicationException e) {
-            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
+            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage())); //日志文件加入错误信息
         }
         return false;
     }
 
     /**
      * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
-     */
+     */ //计数用户除开系统文件之外的其余文件。
     public static int getUserFolderCount(ContentResolver resolver) {
-        Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,
+        Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,   //光标指向uri资源地址
                 new String[] { "COUNT(*)" },
                 NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
                 new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
@@ -123,19 +123,19 @@ public class DataUtils {
 
         int count = 0;
         if(cursor != null) {
-            if(cursor.moveToFirst()) {
+            if(cursor.moveToFirst()) {  //移动到第一位开始计数
                 try {
                     count = cursor.getInt(0);
                 } catch (IndexOutOfBoundsException e) {
                     Log.e(TAG, "get folder count failed:" + e.toString());
                 } finally {
-                    cursor.close();
+                    cursor.close();         //最终关闭，可能存在问题，cursor可能无法正常释放，从而导致程序崩溃
                 }
             }
         }
         return count;
     }
-
+    //可视化操作数据库，搭建ui界面方便用户操作本地数据库
     public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                 null,
@@ -152,21 +152,21 @@ public class DataUtils {
         }
         return exist;
     }
-
+    //判断是否存在笔记数据库
     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) {
+            if (cursor.getCount() > 0) {    //计数如果大于零，就说明存在
                 exist = true;
             }
             cursor.close();
         }
         return exist;
     }
-
+    //判断是否存在数据库
     public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
         Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
                 null, null, null, null);
@@ -180,42 +180,42 @@ public class DataUtils {
         }
         return exist;
     }
-
+    //判断可视化文件夹名称是否合法
     public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
-        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
+        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,    //相应的文件名称规范
                 NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
-                " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
-                " AND " + NoteColumns.SNIPPET + "=?",
+                        " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
+                        " AND " + NoteColumns.SNIPPET + "=?",
                 new String[] { name }, null);
         boolean exist = false;
         if(cursor != null) {
-            if(cursor.getCount() > 0) {
+            if(cursor.getCount() > 0) {     //判断是否存在
                 exist = true;
             }
             cursor.close();
         }
         return exist;
     }
-
+    //哈希设置获取文件夹部件
     public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
-        Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
+        Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,       //设置光标
                 new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
                 NoteColumns.PARENT_ID + "=?",
                 new String[] { String.valueOf(folderId) },
                 null);
 
         HashSet<AppWidgetAttribute> set = null;
-        if (c != null) {
-            if (c.moveToFirst()) {
+        if (c != null) {            //光标不指向空，意味着存在
+            if (c.moveToFirst()) {      //移动到第一位
                 set = new HashSet<AppWidgetAttribute>();
                 do {
                     try {
                         AppWidgetAttribute widget = new AppWidgetAttribute();
-                        widget.widgetId = c.getInt(0);
-                        widget.widgetType = c.getInt(1);
-                        set.add(widget);
+                        widget.widgetId = c.getInt(0);  //得到部件id，0是请求代码
+                        widget.widgetType = c.getInt(1); //得到部件种类，1是请求代码
+                        set.add(widget);    //将部件加入到哈希设置中
                     } catch (IndexOutOfBoundsException e) {
-                        Log.e(TAG, e.toString());
+                        Log.e(TAG, e.toString());   //检测异常，加入到错误日志文件中去
                     }
                 } while (c.moveToNext());
             }
@@ -223,39 +223,39 @@ public class DataUtils {
         }
         return set;
     }
-
+    //得到电话号码笔记id
     public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
-        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
+        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,  //设置光标
                 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()) {
+        if (cursor != null && cursor.moveToFirst()) {   //光标不为空
             try {
                 return cursor.getString(0);
             } catch (IndexOutOfBoundsException e) {
-                Log.e(TAG, "Get call number fails " + e.toString());
+                Log.e(TAG, "Get call number fails " + e.toString());//检测异常，加入到错误日志文件中去
             } finally {
                 cursor.close();
             }
         }
         return "";
     }
-
+    //得到电话号码和电话日期
     public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
         Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
-                new String [] { CallNote.NOTE_ID },
+                new String [] { CallNote.NOTE_ID },//设置光标
                 CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
-                + CallNote.PHONE_NUMBER + ",?)",
+                        + CallNote.PHONE_NUMBER + ",?)",
                 new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
                 null);
 
-        if (cursor != null) {
+        if (cursor != null) {   //光标不为空
             if (cursor.moveToFirst()) {
                 try {
                     return cursor.getLong(0);
-                } catch (IndexOutOfBoundsException e) {
+                } catch (IndexOutOfBoundsException e) { //检测异常，加入到错误日志文件中去
                     Log.e(TAG, "Get call note id fails " + e.toString());
                 }
             }
@@ -263,31 +263,31 @@ public class DataUtils {
         }
         return 0;
     }
-
+    //得到片段id
     public static String getSnippetById(ContentResolver resolver, long noteId) {
-        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
+        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,  //设置光标
                 new String [] { NoteColumns.SNIPPET },
                 NoteColumns.ID + "=?",
                 new String [] { String.valueOf(noteId)},
                 null);
 
-        if (cursor != null) {
+        if (cursor != null) {   //光标不为空
             String snippet = "";
-            if (cursor.moveToFirst()) {
-                snippet = cursor.getString(0);
+            if (cursor.moveToFirst()) { //移动到开始
+                snippet = cursor.getString(0);  //通过请求代码0，请求获取字符串，并传递给snippet
             }
-            cursor.close();
+            cursor.close(); //关闭光标
             return snippet;
-        }
+        }   //抛出不合法提示
         throw new IllegalArgumentException("Note is not found with id: " + noteId);
     }
-
+    //得到规范的片段
     public static String getFormattedSnippet(String snippet) {
-        if (snippet != null) {
+        if (snippet != null) {          //片段若不为空
             snippet = snippet.trim();
-            int index = snippet.indexOf('\n');
-            if (index != -1) {
-                snippet = snippet.substring(0, index);
+            int index = snippet.indexOf('\n');      //开始索引换行符
+            if (index != -1) {              //如果是换行符
+                snippet = snippet.substring(0, index);  //截取字符串
             }
         }
         return snippet;
diff --git a/src/tool/ResourceParser.java b/src/tool/ResourceParser.java
index 1ad3ad6..874faf5 100644
--- a/src/tool/ResourceParser.java
+++ b/src/tool/ResourceParser.java
@@ -24,48 +24,73 @@ import net.micode.notes.ui.NotesPreferenceActivity;
 
 public class ResourceParser {
 
+    // 定义不同颜色的常量
     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;
 
+    // 默认背景颜色为黄色
     public static final int BG_DEFAULT_COLOR = YELLOW;
 
+    // 定义不同字体大小的常量
     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;
 
+    // 默认字体大小为中等
     public static final int BG_DEFAULT_FONT_SIZE = TEXT_MEDIUM;
 
+    /**
+     * 处理笔记背景资源的静态内部类
+     */
     public static class NoteBgResources {
+        // 编辑状态下的背景资源数组
         private final static int [] BG_EDIT_RESOURCES = new int [] {
-            R.drawable.edit_yellow,
-            R.drawable.edit_blue,
-            R.drawable.edit_white,
-            R.drawable.edit_green,
-            R.drawable.edit_red
+                R.drawable.edit_yellow,
+                R.drawable.edit_blue,
+                R.drawable.edit_white,
+                R.drawable.edit_green,
+                R.drawable.edit_red
         };
 
+        // 编辑状态下的标题背景资源数组
         private final static int [] BG_EDIT_TITLE_RESOURCES = new int [] {
-            R.drawable.edit_title_yellow,
-            R.drawable.edit_title_blue,
-            R.drawable.edit_title_white,
-            R.drawable.edit_title_green,
-            R.drawable.edit_title_red
+                R.drawable.edit_title_yellow,
+                R.drawable.edit_title_blue,
+                R.drawable.edit_title_white,
+                R.drawable.edit_title_green,
+                R.drawable.edit_title_red
         };
 
+        /**
+         * 根据id获取笔记背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getNoteBgResource(int id) {
             return BG_EDIT_RESOURCES[id];
         }
 
+        /**
+         * 根据id获取笔记标题背景资源
+         * @param id 颜色id
+         * @return 标题背景资源id
+         */
         public static int getNoteTitleBgResource(int id) {
             return BG_EDIT_TITLE_RESOURCES[id];
         }
     }
 
+    /**
+     * 获取默认笔记背景id
+     * @param context 上下文对象，用于访问SharedPreferences
+     * @return 笔记背景资源id
+     */
     public static int getDefaultBgId(Context context) {
+        // 如果用户设置了背景颜色，则随机选择一个背景，否则使用默认背景
         if (PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
                 NotesPreferenceActivity.PREFERENCE_SET_BG_COLOR_KEY, false)) {
             return (int) (Math.random() * NoteBgResources.BG_EDIT_RESOURCES.length);
@@ -74,106 +99,161 @@ public class ResourceParser {
         }
     }
 
+    /**
+     * 处理笔记项背景资源的静态内部类
+     */
     public static class NoteItemBgResources {
+        // 第一个笔记项的背景资源数组
         private final static int [] BG_FIRST_RESOURCES = new int [] {
-            R.drawable.list_yellow_up,
-            R.drawable.list_blue_up,
-            R.drawable.list_white_up,
-            R.drawable.list_green_up,
-            R.drawable.list_red_up
+                R.drawable.list_yellow_up,
+                R.drawable.list_blue_up,
+                R.drawable.list_white_up,
+                R.drawable.list_green_up,
+                R.drawable.list_red_up
         };
 
+        // 普通笔记项的背景资源数组
         private final static int [] BG_NORMAL_RESOURCES = new int [] {
-            R.drawable.list_yellow_middle,
-            R.drawable.list_blue_middle,
-            R.drawable.list_white_middle,
-            R.drawable.list_green_middle,
-            R.drawable.list_red_middle
+                R.drawable.list_yellow_middle,
+                R.drawable.list_blue_middle,
+                R.drawable.list_white_middle,
+                R.drawable.list_green_middle,
+                R.drawable.list_red_middle
         };
 
+        // 最后一个笔记项的背景资源数组
         private final static int [] BG_LAST_RESOURCES = new int [] {
-            R.drawable.list_yellow_down,
-            R.drawable.list_blue_down,
-            R.drawable.list_white_down,
-            R.drawable.list_green_down,
-            R.drawable.list_red_down,
+                R.drawable.list_yellow_down,
+                R.drawable.list_blue_down,
+                R.drawable.list_white_down,
+                R.drawable.list_green_down,
+                R.drawable.list_red_down,
         };
 
+        // 单个笔记项的背景资源数组
         private final static int [] BG_SINGLE_RESOURCES = new int [] {
-            R.drawable.list_yellow_single,
-            R.drawable.list_blue_single,
-            R.drawable.list_white_single,
-            R.drawable.list_green_single,
-            R.drawable.list_red_single
+                R.drawable.list_yellow_single,
+                R.drawable.list_blue_single,
+                R.drawable.list_white_single,
+                R.drawable.list_green_single,
+                R.drawable.list_red_single
         };
 
+        /**
+         * 获取第一个笔记项的背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getNoteBgFirstRes(int id) {
             return BG_FIRST_RESOURCES[id];
         }
 
+        /**
+         * 获取最后一个笔记项的背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getNoteBgLastRes(int id) {
             return BG_LAST_RESOURCES[id];
         }
 
+        /**
+         * 获取单个笔记项的背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getNoteBgSingleRes(int id) {
             return BG_SINGLE_RESOURCES[id];
         }
 
+        /**
+         * 获取普通笔记项的背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getNoteBgNormalRes(int id) {
             return BG_NORMAL_RESOURCES[id];
         }
 
+        /**
+         * 获取文件夹背景资源
+         * @return 文件夹背景资源id
+         */
         public static int getFolderBgRes() {
             return R.drawable.list_folder;
         }
     }
 
+    /**
+     * 处理小部件背景资源的静态内部类
+     */
     public static class WidgetBgResources {
+        // 2x小部件背景资源数组
         private final static int [] BG_2X_RESOURCES = new int [] {
-            R.drawable.widget_2x_yellow,
-            R.drawable.widget_2x_blue,
-            R.drawable.widget_2x_white,
-            R.drawable.widget_2x_green,
-            R.drawable.widget_2x_red,
+                R.drawable.widget_2x_yellow,
+                R.drawable.widget_2x_blue,
+                R.drawable.widget_2x_white,
+                R.drawable.widget_2x_green,
+                R.drawable.widget_2x_red,
         };
 
+        /**
+         * 根据id获取2x小部件背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getWidget2xBgResource(int id) {
             return BG_2X_RESOURCES[id];
         }
 
+        // 4x小部件背景资源数组
         private final static int [] BG_4X_RESOURCES = new int [] {
-            R.drawable.widget_4x_yellow,
-            R.drawable.widget_4x_blue,
-            R.drawable.widget_4x_white,
-            R.drawable.widget_4x_green,
-            R.drawable.widget_4x_red
+                R.drawable.widget_4x_yellow,
+                R.drawable.widget_4x_blue,
+                R.drawable.widget_4x_white,
+                R.drawable.widget_4x_green,
+                R.drawable.widget_4x_red
         };
 
+        /**
+         * 根据id获取4x小部件背景资源
+         * @param id 颜色id
+         * @return 背景资源id
+         */
         public static int getWidget4xBgResource(int id) {
             return BG_4X_RESOURCES[id];
         }
     }
 
+    /**
+     * 处理文本外观资源的静态内部类
+     */
     public static class TextAppearanceResources {
+        // 文本外观资源数组
         private final static int [] TEXTAPPEARANCE_RESOURCES = new int [] {
-            R.style.TextAppearanceNormal,
-            R.style.TextAppearanceMedium,
-            R.style.TextAppearanceLarge,
-            R.style.TextAppearanceSuper
+                R.style.TextAppearanceNormal,
+                R.style.TextAppearanceMedium,
+                R.style.TextAppearanceLarge,
+                R.style.TextAppearanceSuper
         };
 
+        /**
+         * 根据id获取文本外观资源
+         * @param id 外观id
+         * @return 文本外观资源id
+         */
         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}
-             */
+            // 若id超出资源数组范围，则返回默认字体大小
             if (id >= TEXTAPPEARANCE_RESOURCES.length) {
                 return BG_DEFAULT_FONT_SIZE;
             }
             return TEXTAPPEARANCE_RESOURCES[id];
         }
 
+        /**
+         * 获取文本外观资源的数量
+         * @return 资源数量
+         */
         public static int getResourcesSize() {
             return TEXTAPPEARANCE_RESOURCES.length;
         }
diff --git a/src/ui/AlarmAlertActivity.java b/src/ui/AlarmAlertActivity.java
index 85723be..49f58a8 100644
--- a/src/ui/AlarmAlertActivity.java
+++ b/src/ui/AlarmAlertActivity.java
@@ -16,22 +16,22 @@
 
 package net.micode.notes.ui;
 
-import android.app.Activity;
-import android.app.AlertDialog;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
-import android.content.DialogInterface.OnDismissListener;
-import android.content.Intent;
-import android.media.AudioManager;
-import android.media.MediaPlayer;
-import android.media.RingtoneManager;
-import android.net.Uri;
-import android.os.Bundle;
-import android.os.PowerManager;
-import android.provider.Settings;
-import android.view.Window;
-import android.view.WindowManager;
+import android.app.Activity;      //表示引入 Android 应用程序中的 Activity 类，用于创建用户界面
+import android.app.AlertDialog;   //表示引入 Android 应用程序中的 AlertDialog 类，用于创建对话框。
+import android.content.Context;   //表示引入 Android 应用程序中的 Context 类，用于访问应用程序的资源和执行操作。
+import android.content.DialogInterface;  //表示引入 Android 应用程序中的 DialogInterface 类，用于处理对话框事件
+import android.content.DialogInterface.OnClickListener;  //表示引入 Android 应用程序中的 OnClickListener 接口，用于处理对话框按钮点击事件。
+import android.content.DialogInterface.OnDismissListener;  //表示引入 Android 应用程序中的 OnDismissListener 接口，用于处理对话框消失事件
+import android.content.Intent;      //表示引入 Android 应用程序中的 Intent 类，用于在应用程序组件之间进行通信。
+import android.media.AudioManager;  //表示引入 Android 应用程序中的 AudioManager 类，用于控制音频管理器。
+import android.media.MediaPlayer;   //表示引入 Android 应用程序中的 MediaPlayer 类，用于实现音频播放功能。
+import android.media.RingtoneManager;  //表示引入 Android 应用程序中的 RingtoneManager 类，用于管理铃声。
+import android.net.Uri;             //表示引入 Android 应用程序中的 Uri 类，用于表示统一资源标识符。
+import android.os.Bundle;           //表示引入 Android 应用程序中的 Bundle 类，用于传递数据。
+import android.os.PowerManager;     //表示引入 Android 应用程序中的 PowerManager 类，用于管理设备电源。
+import android.provider.Settings;   //表示引入 Android 应用程序中的 Settings 类，用于访问设备设置。
+import android.view.Window;         //表示引入 Android 应用程序中的 Window 类，用于管理窗口。
+import android.view.WindowManager;  //表示引入 Android 应用程序中的 WindowManager 类，用于管理窗口布局和显示。
 
 import net.micode.notes.R;
 import net.micode.notes.data.Notes;
@@ -39,58 +39,81 @@ import net.micode.notes.tool.DataUtils;
 
 import java.io.IOException;
 
-
 public class AlarmAlertActivity extends Activity implements OnClickListener, OnDismissListener {
-    private long mNoteId;
-    private String mSnippet;
-    private static final int SNIPPET_PREW_MAX_LEN = 60;
+    private long mNoteId;      //文本在数据库存储中的ID号
+    private String mSnippet;   //闹钟提示时出现的文本片段
+    private static final int SNIPPET_PREW_MAX_LEN = 60;  //表示文本片段的最大长度。
     MediaPlayer mPlayer;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        //Bundle类型的数据与Map类型的数据相似，都是以key-value的形式存储数据的
+        //onsaveInstanceState方法是用来保存Activity的状态的
+        //能从onCreate的参数savedInsanceState中获得状态数据
         requestWindowFeature(Window.FEATURE_NO_TITLE);
+        //界面显示——无标题
 
         final Window win = getWindow();
         win.addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
 
         if (!isScreenOn()) {
             win.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+                    //保持窗体点亮
                     | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON
+                    //将窗体点亮
                     | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+                    //允许窗体点亮时锁屏
                     | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR);
-        }
+        }//在手机锁屏后如果到了闹钟提示时间，点亮屏幕
 
         Intent intent = getIntent();
 
         try {
             mNoteId = Long.valueOf(intent.getData().getPathSegments().get(1));
             mSnippet = DataUtils.getSnippetById(this.getContentResolver(), mNoteId);
+            //根据ID从数据库中获取标签的内容；
+            //getContentResolver（）是实现数据共享，实例存储。
             mSnippet = mSnippet.length() > SNIPPET_PREW_MAX_LEN ? mSnippet.substring(0,
                     SNIPPET_PREW_MAX_LEN) + getResources().getString(R.string.notelist_string_info)
                     : mSnippet;
+            //判断标签片段是否达到符合长度
         } catch (IllegalArgumentException e) {
             e.printStackTrace();
             return;
         }
-
+        /*
+        try
+        {
+        	// 代码区
+        }
+        catch(Exception e)
+        {
+        	// 异常处理
+        }
+                     代码区如果有错误，就会返回所写异常的处理。*/
         mPlayer = new MediaPlayer();
         if (DataUtils.visibleInNoteDatabase(getContentResolver(), mNoteId, Notes.TYPE_NOTE)) {
             showActionDialog();
+            //弹出对话框
             playAlarmSound();
+            //闹钟提示音激发
         } else {
             finish();
+            //完成闹钟动作
         }
     }
 
     private boolean isScreenOn() {
+        //判断屏幕是否锁屏，调用系统函数判断，最后返回值是布尔类型
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
         return pm.isScreenOn();
     }
 
     private void playAlarmSound() {
+        //闹钟提示音激发
         Uri url = RingtoneManager.getActualDefaultRingtoneUri(this, RingtoneManager.TYPE_ALARM);
-
+        //调用系统的铃声管理URI，得到闹钟提示音
         int silentModeStreams = Settings.System.getInt(getContentResolver(),
                 Settings.System.MODE_RINGER_STREAMS_AFFECTED, 0);
 
@@ -101,12 +124,19 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
         }
         try {
             mPlayer.setDataSource(this, url);
+            //方法：setDataSource(Context context, Uri uri)
+            //解释：无返回值，设置多媒体数据来源【根据 Uri】
             mPlayer.prepare();
+            //准备同步
             mPlayer.setLooping(true);
+            //设置是否循环播放
             mPlayer.start();
+            //开始播放
         } catch (IllegalArgumentException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
+            //e.printStackTrace()函数功能是抛出异常， 还将显示出更深的调用信息
+            //System.out.println(e)，这个方法打印出异常，并且输出在哪里出现的异常
         } catch (SecurityException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
@@ -121,37 +151,57 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
 
     private void showActionDialog() {
         AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+        //AlertDialog的构造方法全部是Protected的
+        //所以不能直接通过new一个AlertDialog来创建出一个AlertDialog。
+        //要创建一个AlertDialog，就要用到AlertDialog.Builder中的create()方法
+        //如这里的dialog就是新建了一个AlertDialog
         dialog.setTitle(R.string.app_name);
+        //为对话框设置标题
         dialog.setMessage(mSnippet);
+        //为对话框设置内容
         dialog.setPositiveButton(R.string.notealert_ok, this);
+        //给对话框添加"Yes"按钮
         if (isScreenOn()) {
             dialog.setNegativeButton(R.string.notealert_enter, this);
-        }
+        }//对话框添加"No"按钮
         dialog.show().setOnDismissListener(this);
     }
 
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
+            //用which来选择click后下一步的操作
             case DialogInterface.BUTTON_NEGATIVE:
+                //这是取消操作
                 Intent intent = new Intent(this, NoteEditActivity.class);
+                //实现两个类间的数据传输
                 intent.setAction(Intent.ACTION_VIEW);
+                //设置动作属性
                 intent.putExtra(Intent.EXTRA_UID, mNoteId);
+                //实现key-value对
+                //EXTRA_UID为key；mNoteId为键
                 startActivity(intent);
+                //开始动作
                 break;
             default:
+                //这是确定操作
                 break;
         }
     }
 
     public void onDismiss(DialogInterface dialog) {
+        //忽略
         stopAlarmSound();
+        //停止闹钟声音
         finish();
+        //完成该动作
     }
 
     private void stopAlarmSound() {
         if (mPlayer != null) {
             mPlayer.stop();
+            //停止播放
             mPlayer.release();
+            //释放MediaPlayer对象
             mPlayer = null;
         }
     }
diff --git a/src/ui/AlarmInitReceiver.java b/src/ui/AlarmInitReceiver.java
index f221202..bbeae00 100644
--- a/src/ui/AlarmInitReceiver.java
+++ b/src/ui/AlarmInitReceiver.java
@@ -31,21 +31,25 @@ import net.micode.notes.data.Notes.NoteColumns;
 public class AlarmInitReceiver extends BroadcastReceiver {
 
     private static final String [] PROJECTION = new String [] {
-        NoteColumns.ID,
-        NoteColumns.ALERTED_DATE
+            NoteColumns.ID,
+            NoteColumns.ALERTED_DATE
     };
-
+    //对数据库的操作，调用标签ID和闹钟时间
     private static final int COLUMN_ID                = 0;
     private static final int COLUMN_ALERTED_DATE      = 1;
 
     @Override
     public void onReceive(Context context, Intent intent) {
         long currentDate = System.currentTimeMillis();
+        //System.currentTimeMillis()产生一个当前的毫秒
+        //这个毫秒其实就是自1970年1月1日0时起的毫秒数
         Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
                 PROJECTION,
                 NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
                 new String[] { String.valueOf(currentDate) },
+                //将long变量currentDate转化为字符串
                 null);
+        //Cursor在这里的作用是通过查找数据库中的标签内容，找到和当前系统时间相等的标签
 
         if (c != null) {
             if (c.moveToFirst()) {
@@ -61,5 +65,8 @@ public class AlarmInitReceiver extends BroadcastReceiver {
             }
             c.close();
         }
+        //然而通过网上查找资料发现，对于闹钟机制的启动，通常需要上面的几个步骤
+        //如新建Intent、PendingIntent以及AlarmManager等
+        //这里就是根据数据库里的闹钟时间创建一个闹钟机制
     }
 }
diff --git a/src/ui/AlarmReceiver.java b/src/ui/AlarmReceiver.java
index 54e503b..814fec2 100644
--- a/src/ui/AlarmReceiver.java
+++ b/src/ui/AlarmReceiver.java
@@ -24,7 +24,12 @@ public class AlarmReceiver extends BroadcastReceiver {
     @Override
     public void onReceive(Context context, Intent intent) {
         intent.setClass(context, AlarmAlertActivity.class);
+        //启动AlarmAlertActivity
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        //activity要存在于activity的栈中，而非activity的途径启动activity时必然不存在一个activity的栈
+        //所以要新起一个栈装入启动的activity
         context.startActivity(intent);
     }
 }
+//这是实现alarm这个功能最接近用户层的包，基于上面的两个包，
+//作用还需要深究但是对于setClass和addFlags的
diff --git a/src/ui/DateTimePicker.java b/src/ui/DateTimePicker.java
index 496b0cd..f917268 100644
--- a/src/ui/DateTimePicker.java
+++ b/src/ui/DateTimePicker.java
@@ -14,7 +14,8 @@
  * limitations under the License.
  */
 
-package net.micode.notes.ui;
+package net.micode.notes.ui;//将当前的 Java 文件放置在 net.micode.notes.ui 这个包中。
+
 
 import java.text.DateFormatSymbols;
 import java.util.Calendar;
@@ -29,7 +30,8 @@ import android.widget.FrameLayout;
 import android.widget.NumberPicker;
 
 public class DateTimePicker extends FrameLayout {
-
+    //FrameLayout是布局模板之一
+    //所有的子元素全部在屏幕的右上方
     private static final boolean DEFAULT_ENABLE_STATE = true;
 
     private static final int HOURS_IN_HALF_DAY = 12;
@@ -45,13 +47,15 @@ public class DateTimePicker extends FrameLayout {
     private static final int MINUT_SPINNER_MAX_VAL = 59;
     private static final int AMPM_SPINNER_MIN_VAL = 0;
     private static final int AMPM_SPINNER_MAX_VAL = 1;
-
+    //初始化控件
     private final NumberPicker mDateSpinner;
     private final NumberPicker mHourSpinner;
     private final NumberPicker mMinuteSpinner;
     private final NumberPicker mAmPmSpinner;
+    //NumberPicker是数字选择器
+    //这里定义的四个变量全部是在设置闹钟时需要选择的变量（如日期、时、分、上午或者下午）
     private Calendar mDate;
-
+    //定义了Calendar类型的变量mDate，用于操作时间
     private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK];
 
     private boolean mIsAm;
@@ -71,41 +75,49 @@ public class DateTimePicker extends FrameLayout {
             updateDateControl();
             onDateTimeChanged();
         }
-    };
+    };//OnValueChangeListener，这是时间改变监听器，这里主要是对日期的监听
+    //将现在日期的值传递给mDate；updateDateControl是同步操作
 
     private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
+        //这里是对 小时（Hour） 的监听
         @Override
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             boolean isDateChanged = false;
             Calendar cal = Calendar.getInstance();
+            //声明一个Calendar的变量cal，便于后续的操作
             if (!mIs24HourView) {
                 if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, 1);
                     isDateChanged = true;
+                    //这里是对于12小时制时，晚上11点和12点交替时对日期的更改
                 } else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, -1);
                     isDateChanged = true;
                 }
+                //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
                 if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
                         oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
                     mIsAm = !mIsAm;
                     updateAmPmControl();
-                }
+                }//这里是对于12小时制时，中午11点和12点交替时对AM和PM的更改
             } else {
                 if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, 1);
                     isDateChanged = true;
+                    //这里是对于24小时制时，晚上11点和12点交替时对日期的更改
                 } else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
                     cal.setTimeInMillis(mDate.getTimeInMillis());
                     cal.add(Calendar.DAY_OF_YEAR, -1);
                     isDateChanged = true;
                 }
-            }
+            } //这里是对于12小时制时，凌晨11点和12点交替时对日期的更改
             int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
+            //通过数字选择器对newHour的赋值
             mDate.set(Calendar.HOUR_OF_DAY, newHour);
+            //通过set函数将新的Hour值传给mDate
             onDateTimeChanged();
             if (isDateChanged) {
                 setCurrentYear(cal.get(Calendar.YEAR));
@@ -117,15 +129,19 @@ public class DateTimePicker extends FrameLayout {
 
     private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
         @Override
+        //这里是对 分钟（Minute）改变的监听
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             int minValue = mMinuteSpinner.getMinValue();
             int maxValue = mMinuteSpinner.getMaxValue();
             int offset = 0;
+            //设置offset，作为小时改变的一个记录数据
             if (oldVal == maxValue && newVal == minValue) {
                 offset += 1;
             } else if (oldVal == minValue && newVal == maxValue) {
                 offset -= 1;
             }
+            //如果原值为59，新值为0，则offset加1
+            //如果原值为0，新值为59，则offset减1
             if (offset != 0) {
                 mDate.add(Calendar.HOUR_OF_DAY, offset);
                 mHourSpinner.setValue(getCurrentHour());
@@ -145,6 +161,7 @@ public class DateTimePicker extends FrameLayout {
     };
 
     private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
+        //对AM和PM的监听
         @Override
         public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
             mIsAm = !mIsAm;
@@ -160,24 +177,27 @@ public class DateTimePicker extends FrameLayout {
 
     public interface OnDateTimeChangedListener {
         void onDateTimeChanged(DateTimePicker view, int year, int month,
-                int dayOfMonth, int hourOfDay, int minute);
+                               int dayOfMonth, int hourOfDay, int minute);
     }
 
     public DateTimePicker(Context context) {
         this(context, System.currentTimeMillis());
-    }
+    }//通过对数据库的访问，获取当前的系统时间
 
     public DateTimePicker(Context context, long date) {
         this(context, date, DateFormat.is24HourFormat(context));
-    }
+    }//上面函数的得到的是一个天文数字（1970至今的秒数），需要DateFormat将其变得有意义
 
     public DateTimePicker(Context context, long date, boolean is24HourView) {
         super(context);
+        //获取系统时间
         mDate = Calendar.getInstance();
         mInitialising = true;
         mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY;
         inflate(context, R.layout.datetime_picker, this);
-
+        //如果当前Activity里用到别的layout，比如对话框layout
+        //还要设置这个layout上的其他组件的内容，就必须用inflate()方法先将对话框的layout找出来
+        //然后再用findViewById()找到它上面的其它组件
         mDateSpinner = (NumberPicker) findViewById(R.id.date);
         mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
         mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
@@ -185,7 +205,7 @@ public class DateTimePicker extends FrameLayout {
 
         mHourSpinner = (NumberPicker) findViewById(R.id.hour);
         mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
-        mMinuteSpinner =  (NumberPicker) findViewById(R.id.minute);
+        mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
         mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
         mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
         mMinuteSpinner.setOnLongPressUpdateInterval(100);
@@ -226,7 +246,9 @@ public class DateTimePicker extends FrameLayout {
         mAmPmSpinner.setEnabled(enabled);
         mIsEnabled = enabled;
     }
-
+    //存在疑问！！！！！！！！！！！！！setEnabled的作用
+    //下面的代码通过原程序的注释已经比较清晰，另外可以通过函数名来判断
+    //下面的各函数主要是对上面代码引用到的各函数功能的实现
     @Override
     public boolean isEnabled() {
         return mIsEnabled;
@@ -239,7 +261,7 @@ public class DateTimePicker extends FrameLayout {
      */
     public long getCurrentDateInTimeMillis() {
         return mDate.getTimeInMillis();
-    }
+    }//实现函数——得到当前的秒数
 
     /**
      * Set the current date
@@ -251,7 +273,7 @@ public class DateTimePicker extends FrameLayout {
         cal.setTimeInMillis(date);
         setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
                 cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
-    }
+    }//实现函数功能——设置当前的时间，参数是date
 
     /**
      * Set the current date
@@ -263,19 +285,20 @@ public class DateTimePicker extends FrameLayout {
      * @param minute The current minute
      */
     public void setCurrentDate(int year, int month,
-            int dayOfMonth, int hourOfDay, int minute) {
+                               int dayOfMonth, int hourOfDay, int minute) {
         setCurrentYear(year);
         setCurrentMonth(month);
         setCurrentDay(dayOfMonth);
         setCurrentHour(hourOfDay);
         setCurrentMinute(minute);
-    }
+    }//实现函数功能——设置当前的时间，参数是各详细的变量
 
     /**
      * Get current year
      *
      * @return The current year
      */
+    //下面是得到year、month、day等值
     public int getCurrentYear() {
         return mDate.get(Calendar.YEAR);
     }
@@ -446,7 +469,7 @@ public class DateTimePicker extends FrameLayout {
         mDateSpinner.setDisplayedValues(mDateDisplayValues);
         mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
         mDateSpinner.invalidate();
-    }
+    }// 对于星期几的算法
 
     private void updateAmPmControl() {
         if (mIs24HourView) {
@@ -455,7 +478,7 @@ public class DateTimePicker extends FrameLayout {
             int index = mIsAm ? Calendar.AM : Calendar.PM;
             mAmPmSpinner.setValue(index);
             mAmPmSpinner.setVisibility(View.VISIBLE);
-        }
+        }// 对于上下午操作的算法
     }
 
     private void updateHourControl() {
@@ -465,7 +488,7 @@ public class DateTimePicker extends FrameLayout {
         } else {
             mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
             mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
-        }
+        }// 对与小时的算法
     }
 
     /**
diff --git a/src/ui/DateTimePickerDialog.java b/src/ui/DateTimePickerDialog.java
index 2c47ba4..0bf2f00 100644
--- a/src/ui/DateTimePickerDialog.java
+++ b/src/ui/DateTimePickerDialog.java
@@ -32,35 +32,47 @@ import android.text.format.DateUtils;
 public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
 
     private Calendar mDate = Calendar.getInstance();
+    //创建一个Calendar类型的变量 mDate，方便时间的操作
     private boolean mIs24HourView;
     private OnDateTimeSetListener mOnDateTimeSetListener;
+    //声明一个时间日期滚动选择控件 mOnDateTimeSetListener
     private DateTimePicker mDateTimePicker;
+    //DateTimePicker控件，控件一般用于让用户可以从日期列表中选择单个值。
+    //运行时，单击控件边上的下拉箭头，会显示为两个部分：一个下拉列表，一个用于选择日期的
 
     public interface OnDateTimeSetListener {
         void OnDateTimeSet(AlertDialog dialog, long date);
     }
 
     public DateTimePickerDialog(Context context, long date) {
+        //对该界面对话框的实例化
         super(context);
+        //对数据库的操作
         mDateTimePicker = new DateTimePicker(context);
         setView(mDateTimePicker);
+        //添加一个子视图
         mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
             public void onDateTimeChanged(DateTimePicker view, int year, int month,
-                    int dayOfMonth, int hourOfDay, int minute) {
+                                          int dayOfMonth, int hourOfDay, int minute) {
                 mDate.set(Calendar.YEAR, year);
                 mDate.set(Calendar.MONTH, month);
                 mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
                 mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
                 mDate.set(Calendar.MINUTE, minute);
+                //将视图中的各选项设置为系统当前时间
                 updateTitle(mDate.getTimeInMillis());
             }
         });
         mDate.setTimeInMillis(date);
+        //得到系统时间
         mDate.set(Calendar.SECOND, 0);
+        //将秒数设置为0
         mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
         setButton(context.getString(R.string.datetime_dialog_ok), this);
         setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
+        //设置按钮
         set24HourView(DateFormat.is24HourFormat(this.getContext()));
+        //时间标准化打印
         updateTitle(mDate.getTimeInMillis());
     }
 
@@ -70,21 +82,22 @@ public class DateTimePickerDialog extends AlertDialog implements OnClickListener
 
     public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
         mOnDateTimeSetListener = callBack;
-    }
+    }//将时间日期滚动选择控件实例化
 
     private void updateTitle(long date) {
         int flag =
-            DateUtils.FORMAT_SHOW_YEAR |
-            DateUtils.FORMAT_SHOW_DATE |
-            DateUtils.FORMAT_SHOW_TIME;
+                DateUtils.FORMAT_SHOW_YEAR |
+                        DateUtils.FORMAT_SHOW_DATE |
+                        DateUtils.FORMAT_SHOW_TIME;
         flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
         setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
-    }
+    }//android开发中常见日期管理工具类（API）——DateUtils：按照上下午显示时间
 
     public void onClick(DialogInterface arg0, int arg1) {
         if (mOnDateTimeSetListener != null) {
             mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
         }
-    }
+    }//第一个参数arg0是接收到点击事件的对话框
+    //第二个参数arg1是该对话框上的按钮
 
 }
\ No newline at end of file
diff --git a/src/ui/DropdownMenu.java b/src/ui/DropdownMenu.java
index 613dc74..3e7386c 100644
--- a/src/ui/DropdownMenu.java
+++ b/src/ui/DropdownMenu.java
@@ -30,14 +30,18 @@ import net.micode.notes.R;
 public class DropdownMenu {
     private Button mButton;
     private PopupMenu mPopupMenu;
+    //声明一个下拉菜单
     private Menu mMenu;
 
     public DropdownMenu(Context context, Button button, int menuId) {
         mButton = button;
         mButton.setBackgroundResource(R.drawable.dropdown_icon);
+        //设置这个view的背景
         mPopupMenu = new PopupMenu(context, mButton);
         mMenu = mPopupMenu.getMenu();
         mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
+        //MenuInflater是用来实例化Menu目录下的Menu布局文件
+        //根据ID来确认menu的内容选项
         mButton.setOnClickListener(new OnClickListener() {
             public void onClick(View v) {
                 mPopupMenu.show();
@@ -48,14 +52,14 @@ public class DropdownMenu {
     public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
         if (mPopupMenu != null) {
             mPopupMenu.setOnMenuItemClickListener(listener);
-        }
+        }//设置菜单的监听
     }
 
     public MenuItem findItem(int id) {
         return mMenu.findItem(id);
-    }
+    }//对于菜单选项的初始化，根据索引搜索菜单需要的选项
 
     public void setTitle(CharSequence title) {
         mButton.setText(title);
-    }
+    }//布局文件，设置标题
 }
diff --git a/src/ui/FoldersListAdapter.java b/src/ui/FoldersListAdapter.java
index 96b77da..fa714df 100644
--- a/src/ui/FoldersListAdapter.java
+++ b/src/ui/FoldersListAdapter.java
@@ -30,10 +30,14 @@ import net.micode.notes.data.Notes.NoteColumns;
 
 
 public class FoldersListAdapter extends CursorAdapter {
+    //CursorAdapter是Cursor和ListView的接口
+    //FoldersListAdapter继承了CursorAdapter的类
+    //主要作用是便签数据库和用户的交互
+    //这里就是用folder（文件夹）的形式展现给用户
     public static final String [] PROJECTION = {
-        NoteColumns.ID,
-        NoteColumns.SNIPPET
-    };
+            NoteColumns.ID,
+            NoteColumns.SNIPPET
+    };//调用数据库中便签的ID和片段
 
     public static final int ID_COLUMN   = 0;
     public static final int NAME_COLUMN = 1;
@@ -41,12 +45,13 @@ public class FoldersListAdapter extends CursorAdapter {
     public FoldersListAdapter(Context context, Cursor c) {
         super(context, c);
         // TODO Auto-generated constructor stub
-    }
+    }//数据库操作
 
     @Override
     public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        //ViewGroup是容器
         return new FolderListItem(context);
-    }
+    }//创建一个文件夹，对于各文件夹中子标签的初始化
 
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
@@ -55,20 +60,22 @@ public class FoldersListAdapter extends CursorAdapter {
                     .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
             ((FolderListItem) view).bind(folderName);
         }
-    }
+    }//将各个布局文件绑定起来
 
     public String getFolderName(Context context, int position) {
         Cursor cursor = (Cursor) getItem(position);
         return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
                 .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
-    }
+    }//根据数据库中标签的ID得到标签的各项内容
 
     private class FolderListItem extends LinearLayout {
         private TextView mName;
 
         public FolderListItem(Context context) {
             super(context);
+            //操作数据库
             inflate(context, R.layout.folder_list_item, this);
+            //根据布局文件的名字等信息将其找出来
             mName = (TextView) findViewById(R.id.tv_folder_name);
         }
 
@@ -76,5 +83,4 @@ public class FoldersListAdapter extends CursorAdapter {
             mName.setText(name);
         }
     }
-
 }
diff --git a/src/ui/NoteEditActivity.java b/src/ui/NoteEditActivity.java
index 96a9ff8..0faa62e 100644
--- a/src/ui/NoteEditActivity.java
+++ b/src/ui/NoteEditActivity.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.app.Activity;
@@ -74,6 +58,8 @@ import java.util.regex.Pattern;
 
 public class NoteEditActivity extends Activity implements OnClickListener,
         NoteSettingChangedListener, OnTextViewChangeListener {
+    //该类主要是针对标签的编辑
+    //继承了系统内部许多和监听有关的类
     private class HeadViewHolder {
         public TextView tvModified;
 
@@ -83,7 +69,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
 
         public ImageView ibSetBgColor;
     }
-
+    //使用Map实现数据存储
     private static final Map<Integer, Integer> sBgSelectorBtnsMap = new HashMap<Integer, Integer>();
     static {
         sBgSelectorBtnsMap.put(R.id.iv_bg_yellow, ResourceParser.YELLOW);
@@ -91,6 +77,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sBgSelectorBtnsMap.put(R.id.iv_bg_blue, ResourceParser.BLUE);
         sBgSelectorBtnsMap.put(R.id.iv_bg_green, ResourceParser.GREEN);
         sBgSelectorBtnsMap.put(R.id.iv_bg_white, ResourceParser.WHITE);
+        //put函数是将指定值和指定键相连
     }
 
     private static final Map<Integer, Integer> sBgSelectorSelectionMap = new HashMap<Integer, Integer>();
@@ -100,6 +87,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sBgSelectorSelectionMap.put(ResourceParser.BLUE, R.id.iv_bg_blue_select);
         sBgSelectorSelectionMap.put(ResourceParser.GREEN, R.id.iv_bg_green_select);
         sBgSelectorSelectionMap.put(ResourceParser.WHITE, R.id.iv_bg_white_select);
+        //put函数是将指定值和指定键相连
     }
 
     private static final Map<Integer, Integer> sFontSizeBtnsMap = new HashMap<Integer, Integer>();
@@ -108,6 +96,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sFontSizeBtnsMap.put(R.id.ll_font_small, ResourceParser.TEXT_SMALL);
         sFontSizeBtnsMap.put(R.id.ll_font_normal, ResourceParser.TEXT_MEDIUM);
         sFontSizeBtnsMap.put(R.id.ll_font_super, ResourceParser.TEXT_SUPER);
+        //put函数是将指定值和指定键相连
     }
 
     private static final Map<Integer, Integer> sFontSelectorSelectionMap = new HashMap<Integer, Integer>();
@@ -116,6 +105,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_SMALL, R.id.iv_small_select);
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_MEDIUM, R.id.iv_medium_select);
         sFontSelectorSelectionMap.put(ResourceParser.TEXT_SUPER, R.id.iv_super_select);
+        //put函数是将指定值和指定键相连
     }
 
     private static final String TAG = "NoteEditActivity";
@@ -123,20 +113,23 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     private HeadViewHolder mNoteHeaderHolder;
 
     private View mHeadViewPanel;
-
+    //私有化一个界面操作mHeadViewPanel，对表头的操作
     private View mNoteBgColorSelector;
-
+    //私有化一个界面操作mNoteBgColorSelector，对背景颜色的操作
     private View mFontSizeSelector;
-
+    //私有化一个界面操作mFontSizeSelector，对标签字体的操作
     private EditText mNoteEditor;
-
+    //声明编辑控件，对文本操作
     private View mNoteEditorPanel;
-
-    private WorkingNote mWorkingNote;
-
+    //私有化一个界面操作mNoteEditorPanel，文本编辑的控制板
+    //private WorkingNote mWorkingNote;
+    public WorkingNote mWorkingNote;
+    //对模板WorkingNote的初始化
     private SharedPreferences mSharedPrefs;
+    //私有化SharedPreferences的数据存储方式
+    //它的本质是基于XML文件存储key-value键值对数据
     private int mFontSizeId;
-
+    //用于操作字体的大小
     private static final String PREFERENCE_FONT_SIZE = "pref_font_size";
 
     private static final int SHORTCUT_ICON_TITLE_MAX_LEN = 10;
@@ -145,7 +138,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     public static final String TAG_UNCHECKED = String.valueOf('\u25A1');
 
     private LinearLayout mEditTextList;
-
+    //线性布局
     private String mUserQuery;
     private Pattern mPattern;
 
@@ -153,7 +146,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         this.setContentView(R.layout.note_edit);
-
+        //对数据库的访问操作
         if (savedInstanceState == null && !initActivityState(getIntent())) {
             finish();
             return;
@@ -176,7 +169,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                 return;
             }
             Log.d(TAG, "Restoring from killed activity");
-        }
+        }//为防止内存不足时程序的终止，在这里有一个保存现场的函数
     }
 
     private boolean initActivityState(Intent intent) {
@@ -188,34 +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);
@@ -240,15 +241,17 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                         finish();
                         return false;
                     }
+                    //将电话号码与手机的号码簿相关
                 } else {
                     mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId,
                             widgetType, bgResId);
                     mWorkingNote.convertToCallNote(phoneNumber, callDate);
+                    //
                 }
             } else {
                 mWorkingNote = WorkingNote.createEmptyNote(this, folderId, widgetId, widgetType,
                         bgResId);
-            }
+            }//创建一个新的WorkingNote
 
             getWindow().setSoftInputMode(
                     WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
@@ -269,8 +272,10 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     private void initNoteScreen() {
+        //对界面的初始化操作
         mNoteEditor.setTextAppearance(this, TextAppearanceResources
                 .getTexAppearanceResource(mFontSizeId));
+        //设置外观
         if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
             switchToListMode(mWorkingNote.getContent());
         } else {
@@ -294,18 +299,21 @@ public class NoteEditActivity extends Activity implements OnClickListener,
          */
         showAlertHeader();
     }
-
+    //设置闹钟的显示
     private void showAlertHeader() {
         if (mWorkingNote.hasClockAlert()) {
             long time = System.currentTimeMillis();
             if (time > mWorkingNote.getAlertDate()) {
                 mNoteHeaderHolder.tvAlertDate.setText(R.string.note_alert_expired);
-            } else {
+            }
+            //如果系统时间大于了闹钟设置的时间，那么闹钟失效
+            else {
                 mNoteHeaderHolder.tvAlertDate.setText(DateUtils.getRelativeTimeSpanString(
                         mWorkingNote.getAlertDate(), time, DateUtils.MINUTE_IN_MILLIS));
             }
             mNoteHeaderHolder.tvAlertDate.setVisibility(View.VISIBLE);
             mNoteHeaderHolder.ivAlertIcon.setVisibility(View.VISIBLE);
+            //显示闹钟开启的图标
         } else {
             mNoteHeaderHolder.tvAlertDate.setVisibility(View.GONE);
             mNoteHeaderHolder.ivAlertIcon.setVisibility(View.GONE);
@@ -329,26 +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);
@@ -357,9 +368,11 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         if (ev.getX() < x
                 || ev.getX() > (x + view.getWidth())
                 || ev.getY() < y
-                || ev.getY() > (y + view.getHeight())) {
-                    return false;
-                }
+                || ev.getY() > (y + view.getHeight()))
+        //如果触控的位置超出了给定的范围，返回false
+        {
+            return false;
+        }
         return true;
     }
 
@@ -377,13 +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);
         /**
@@ -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) {
@@ -418,7 +431,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         }
 
         intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
-            mWorkingNote.getWidgetId()
+                mWorkingNote.getWidgetId()
         });
 
         sendBroadcast(intent);
@@ -450,7 +463,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
             }
             mFontSizeSelector.setVisibility(View.GONE);
         }
-    }
+    }//************************存在问题
 
     @Override
     public void onBackPressed() {
@@ -481,6 +494,7 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     @Override
+    //对选择菜单的准备
     public boolean onPrepareOptionsMenu(Menu menu) {
         if (isFinishing()) {
             return true;
@@ -489,6 +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);
         }
@@ -506,45 +521,71 @@ public class NoteEditActivity extends Activity implements OnClickListener,
     }
 
     @Override
+    /*
+     * 函数功能：动态改变菜单选项内容
+     * 函数实现：如下注释
+     */
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
+            //根据菜单的id来编剧相关项目
             case R.id.menu_new_note:
+                //创建一个新的便签
                 createNewNote();
                 break;
             case R.id.menu_delete:
+                //删除便签
                 AlertDialog.Builder builder = new AlertDialog.Builder(this);
+                //创建关于删除操作的对话框
                 builder.setTitle(getString(R.string.alert_title_delete));
+                // 设置标签的标题为alert_title_delete
                 builder.setIcon(android.R.drawable.ic_dialog_alert);
+                //设置对话框图标
                 builder.setMessage(getString(R.string.alert_message_delete_note));
+                //设置对话框内容
                 builder.setPositiveButton(android.R.string.ok,
                         new DialogInterface.OnClickListener() {
+                            //建立按键监听器
                             public void onClick(DialogInterface dialog, int which) {
+                                //点击所触发事件
                                 deleteCurrentNote();
+                                //  删除单签便签
                                 finish();
                             }
                         });
+                //添加“YES”按钮
                 builder.setNegativeButton(android.R.string.cancel, null);
+                //添加“NO”的按钮
                 builder.show();
+                //显示对话框
                 break;
             case R.id.menu_font_size:
+                //字体大小的编辑
                 mFontSizeSelector.setVisibility(View.VISIBLE);
+                // 将字体选择器置为可见
                 findViewById(sFontSelectorSelectionMap.get(mFontSizeId)).setVisibility(View.VISIBLE);
+                // 通过id找到相应的大小
                 break;
             case R.id.menu_list_mode:
+                //选择列表模式
                 mWorkingNote.setCheckListMode(mWorkingNote.getCheckListMode() == 0 ?
                         TextNote.MODE_CHECK_LIST : 0);
                 break;
             case R.id.menu_share:
+                //菜单共享
                 getWorkingText();
                 sendTo(this, mWorkingNote.getContent());
+                // 用sendto函数将运行文本发送到遍历的本文内
                 break;
             case R.id.menu_send_to_desktop:
+                //发送到桌面
                 sendToDesktop();
                 break;
             case R.id.menu_alert:
+                //创建提醒器
                 setReminder();
                 break;
             case R.id.menu_delete_remind:
+                //删除日期提醒
                 mWorkingNote.setAlertDate(0, false);
                 break;
             default:
@@ -553,111 +594,170 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         return true;
     }
 
+    /*
+     * 函数功能：建立事件提醒器
+     * 函数实现：如下注释
+     */
     private void setReminder() {
         DateTimePickerDialog d = new DateTimePickerDialog(this, System.currentTimeMillis());
+        // 建立修改时间日期的对话框
         d.setOnDateTimeSetListener(new OnDateTimeSetListener() {
             public void OnDateTimeSet(AlertDialog dialog, long date) {
                 mWorkingNote.setAlertDate(date	, true);
+                //选择提醒的日期
             }
         });
+        //建立时间日期的监听器
         d.show();
+        //显示对话框
     }
 
     /**
      * Share note to apps that support {@link Intent#ACTION_SEND} action
      * and {@text/plain} type
      */
+    /*
+     * 函数功能：共享便签
+     * 函数实现：如下注释
+     */
     private void sendTo(Context context, String info) {
         Intent intent = new Intent(Intent.ACTION_SEND);
+        //建立intent链接选项
         intent.putExtra(Intent.EXTRA_TEXT, info);
+        //将需要传递的便签信息放入text文件中
         intent.setType("text/plain");
+        //编辑连接器的类型
         context.startActivity(intent);
+        //在acti中进行链接
     }
 
+    /*
+     * 函数功能：创建一个新的便签
+     * 函数实现：如下注释
+     */
     private void createNewNote() {
         // Firstly, save current editing notes
+        //保存当前便签
         saveNote();
 
         // For safety, start a new NoteEditActivity
         finish();
         Intent intent = new Intent(this, NoteEditActivity.class);
+        //设置链接器
         intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
+        //该活动定义为创建或编辑
         intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mWorkingNote.getFolderId());
+        //将运行便签的id添加到INTENT_EXTRA_FOLDER_ID标记中
         startActivity(intent);
+        //开始activity并链接
     }
 
+    /*
+     * 函数功能：删除当前便签
+     * 函数实现：如下注释
+     */
     private void deleteCurrentNote() {
         if (mWorkingNote.existInDatabase()) {
+            //假如当前运行的便签内存有数据
             HashSet<Long> ids = new HashSet<Long>();
             long id = mWorkingNote.getNoteId();
             if (id != Notes.ID_ROOT_FOLDER) {
                 ids.add(id);
+                //如果不是头文件夹建立一个hash表把便签id存起来
             } else {
                 Log.d(TAG, "Wrong note id, should not happen");
+                //否则报错
             }
             if (!isSyncMode()) {
+                //在非同步模式情况下
+                //删除操作
                 if (!DataUtils.batchDeleteNotes(getContentResolver(), ids)) {
                     Log.e(TAG, "Delete Note error");
                 }
             } else {
+                //同步模式
+                //移动至垃圾文件夹的操作
                 if (!DataUtils.batchMoveToFolder(getContentResolver(), ids, Notes.ID_TRASH_FOLER)) {
                     Log.e(TAG, "Move notes to trash folder error, should not happens");
                 }
             }
         }
         mWorkingNote.markDeleted(true);
+        //将这些标签的删除标记置为true
     }
 
+    /*
+     * 函数功能：判断是否为同步模式
+     * 函数实现：直接看NotesPreferenceActivity中同步名称是否为空
+     */
     private boolean isSyncMode() {
         return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
     }
 
+    /*
+     * 函数功能：设置提醒时间
+     * 函数实现：如下注释
+     */
     public void onClockAlertChanged(long date, boolean set) {
         /**
          * User could set clock to an unsaved note, so before setting the
          * alert clock, we should save the note first
          */
         if (!mWorkingNote.existInDatabase()) {
+            //首先保存已有的便签
             saveNote();
         }
         if (mWorkingNote.getNoteId() > 0) {
             Intent intent = new Intent(this, AlarmReceiver.class);
             intent.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mWorkingNote.getNoteId()));
+            //若有有运行的便签就是建立一个链接器将标签id都存在uri中
             PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
             AlarmManager alarmManager = ((AlarmManager) getSystemService(ALARM_SERVICE));
+            //设置提醒管理器
             showAlertHeader();
             if(!set) {
                 alarmManager.cancel(pendingIntent);
             } else {
                 alarmManager.set(AlarmManager.RTC_WAKEUP, date, pendingIntent);
             }
+            //如果用户设置了时间，就通过提醒管理器设置一个监听事项
         } else {
             /**
              * There is the condition that user has input nothing (the note is
              * not worthy saving), we have no note id, remind the user that he
              * should input something
              */
+            //没有运行的便签就报错
             Log.e(TAG, "Clock alert setting error");
             showToast(R.string.error_note_empty_for_clock);
         }
     }
 
+    /*
+     * 函数功能：Widget发生改变的所触发的事件
+     */
     public void onWidgetChanged() {
-        updateWidget();
+        updateWidget();//更新Widget
     }
 
+    /*
+     * 函数功能： 删除编辑文本框所触发的事件
+     * 函数实现：如下注释
+     */
     public void onEditTextDelete(int index, String text) {
         int childCount = mEditTextList.getChildCount();
         if (childCount == 1) {
             return;
         }
-
+        //没有编辑框的话直接返回
         for (int i = index + 1; i < childCount; i++) {
             ((NoteEditText) mEditTextList.getChildAt(i).findViewById(R.id.et_edit_text))
                     .setIndex(i - 1);
+            //通过id把编辑框存在便签编辑框中
         }
 
         mEditTextList.removeViewAt(index);
+        //删除特定位置的视图
         NoteEditText edit = null;
         if(index == 0) {
             edit = (NoteEditText) mEditTextList.getChildAt(0).findViewById(
@@ -666,69 +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) {
@@ -739,12 +871,15 @@ public class NoteEditActivity extends Activity implements OnClickListener,
                 }
             }
         });
+        //建立一个打钩框并设置监听器
 
         if (item.startsWith(TAG_CHECKED)) {
+            //选择勾选
             cb.setChecked(true);
             edit.setPaintFlags(edit.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
             item = item.substring(TAG_CHECKED.length(), item.length()).trim();
         } else if (item.startsWith(TAG_UNCHECKED)) {
+            //选择不勾选
             cb.setChecked(false);
             edit.setPaintFlags(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);
             item = item.substring(TAG_UNCHECKED.length(), item.length()).trim();
@@ -753,61 +888,94 @@ public class NoteEditActivity extends Activity implements OnClickListener,
         edit.setOnTextViewChangeListener(this);
         edit.setIndex(index);
         edit.setText(getHighlightQueryResult(item, mUserQuery));
+        //运行编辑框的监听器对该行为作出反应，并设置下标及文本内容
         return view;
     }
 
+    /*
+     * 函数功能：便签内容发生改变所 触发的事件
+     * 函数实现：如下注释
+     */
     public void onTextChange(int index, boolean hasText) {
         if (index >= mEditTextList.getChildCount()) {
             Log.e(TAG, "Wrong index, should not happen");
             return;
+            //越界报错
         }
         if(hasText) {
             mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.VISIBLE);
         } else {
             mEditTextList.getChildAt(index).findViewById(R.id.cb_edit_item).setVisibility(View.GONE);
         }
+        //如果内容不为空则将其子编辑框可见性置为可见，否则不可见
     }
 
+    /*
+     * 函数功能：检查模式和列表模式的切换
+     * 函数实现：如下注释
+     */
     public void onCheckListModeChanged(int oldMode, int newMode) {
         if (newMode == TextNote.MODE_CHECK_LIST) {
             switchToListMode(mNoteEditor.getText().toString());
+            //检查模式切换到列表模式
         } else {
             if (!getWorkingText()) {
                 mWorkingNote.setWorkingText(mWorkingNote.getContent().replace(TAG_UNCHECKED + " ",
                         ""));
             }
+            //若是获取到文本就改变其检查标记
             mNoteEditor.setText(getHighlightQueryResult(mWorkingNote.getContent(), mUserQuery));
             mEditTextList.setVisibility(View.GONE);
             mNoteEditor.setVisibility(View.VISIBLE);
+            //修改文本编辑器的内容和可见性
         }
     }
 
+    /*
+     * 函数功能：设置勾选选项表并返回是否勾选的标记
+     * 函数实现：如下注释
+     */
     private boolean getWorkingText() {
         boolean hasChecked = false;
+        //初始化check标记
         if (mWorkingNote.getCheckListMode() == TextNote.MODE_CHECK_LIST) {
+            // 若模式为CHECK_LIST
             StringBuilder sb = new StringBuilder();
+            //创建可变字符串
             for (int i = 0; i < mEditTextList.getChildCount(); i++) {
                 View view = mEditTextList.getChildAt(i);
+                //遍历所有子编辑框的视图 
                 NoteEditText edit = (NoteEditText) view.findViewById(R.id.et_edit_text);
                 if (!TextUtils.isEmpty(edit.getText())) {
+                    //若文本不为空
                     if (((CheckBox) view.findViewById(R.id.cb_edit_item)).isChecked()) {
+                        //该选项框已打钩
                         sb.append(TAG_CHECKED).append(" ").append(edit.getText()).append("\n");
                         hasChecked = true;
+                        //扩展字符串为已打钩并把标记置true
                     } else {
                         sb.append(TAG_UNCHECKED).append(" ").append(edit.getText()).append("\n");
+                        //扩展字符串添加未打钩
                     }
                 }
             }
             mWorkingNote.setWorkingText(sb.toString());
+            //利用编辑好的字符串设置运行便签的内容
         } else {
             mWorkingNote.setWorkingText(mNoteEditor.getText().toString());
+            // 若不是该模式直接用编辑器中的内容设置运行中标签的内容
         }
         return hasChecked;
     }
 
+    /*
+     * 函数功能：保存便签
+     * 函数实现：如下注释
+     */
     private boolean saveNote() {
         getWorkingText();
         boolean saved = mWorkingNote.saveNote();
+        //运行 getWorkingText()之后保存
         if (saved) {
             /**
              * There are two modes from List view to edit view, open one note,
@@ -816,11 +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
@@ -853,21 +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();
     }
-}
+}
\ No newline at end of file
diff --git a/src/ui/NoteEditText.java b/src/ui/NoteEditText.java
index 2afe2a8..0d97949 100644
--- a/src/ui/NoteEditText.java
+++ b/src/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 androidx.appcompat.widget.AppCompatEditText {
     private static final String TAG = "NoteEditText";
     private int mIndex;
     private int mSelectionStartBeforeDelete;
@@ -46,6 +31,7 @@ public class NoteEditText extends EditText {
     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);
 
         /**
@@ -77,33 +66,43 @@ 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();
@@ -111,9 +110,12 @@ public class NoteEditText extends EditText {
                 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) {
+            //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/ui/NoteItemData.java b/src/ui/NoteItemData.java
index 0f5a878..9dde13c 100644
--- a/src/ui/NoteItemData.java
+++ b/src/ui/NoteItemData.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;
@@ -28,20 +12,20 @@ import net.micode.notes.tool.DataUtils;
 
 public class NoteItemData {
     static final String [] PROJECTION = new String [] {
-        NoteColumns.ID,
-        NoteColumns.ALERTED_DATE,
-        NoteColumns.BG_COLOR_ID,
-        NoteColumns.CREATED_DATE,
-        NoteColumns.HAS_ATTACHMENT,
-        NoteColumns.MODIFIED_DATE,
-        NoteColumns.NOTES_COUNT,
-        NoteColumns.PARENT_ID,
-        NoteColumns.SNIPPET,
-        NoteColumns.TYPE,
-        NoteColumns.WIDGET_ID,
-        NoteColumns.WIDGET_TYPE,
+            NoteColumns.ID,
+            NoteColumns.ALERTED_DATE,
+            NoteColumns.BG_COLOR_ID,
+            NoteColumns.CREATED_DATE,
+            NoteColumns.HAS_ATTACHMENT,
+            NoteColumns.MODIFIED_DATE,
+            NoteColumns.NOTES_COUNT,
+            NoteColumns.PARENT_ID,
+            NoteColumns.SNIPPET,
+            NoteColumns.TYPE,
+            NoteColumns.WIDGET_ID,
+            NoteColumns.WIDGET_TYPE,
     };
-
+    //常量标记和数据就不一一标记了，意义翻译基本就知道
     private static final int ID_COLUMN                    = 0;
     private static final int ALERTED_DATE_COLUMN          = 1;
     private static final int BG_COLOR_ID_COLUMN           = 2;
@@ -75,8 +59,9 @@ public class NoteItemData {
     private boolean mIsOnlyOneItem;
     private boolean mIsOneNoteFollowingFolder;
     private boolean mIsMultiNotesFollowingFolder;
-
-    public NoteItemData(Context context, Cursor cursor) {
+    //初始化NoteItemData，主要利用光标cursor获取的东西
+    public NoteItemData(Context context, Cursor  cursor) {
+        //getxxx为转换格式
         mId = cursor.getLong(ID_COLUMN);
         mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
         mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
@@ -92,10 +77,11 @@ public class NoteItemData {
         mWidgetId = cursor.getInt(WIDGET_ID_COLUMN);
         mWidgetType = cursor.getInt(WIDGET_TYPE_COLUMN);
 
+        //初始化电话号码的信息
         mPhoneNumber = "";
         if (mParentId == Notes.ID_CALL_RECORD_FOLDER) {
             mPhoneNumber = DataUtils.getCallNumberByNoteId(context.getContentResolver(), mId);
-            if (!TextUtils.isEmpty(mPhoneNumber)) {
+            if (!TextUtils.isEmpty(mPhoneNumber)) {//mphonenumber里有符合字符串，则用contart功能连接
                 mName = Contact.getContact(context, mPhoneNumber);
                 if (mName == null) {
                     mName = mPhoneNumber;
@@ -108,32 +94,35 @@ public class NoteItemData {
         }
         checkPostion(cursor);
     }
-
+    ///根据鼠标的位置设置标记，和位置
     private void checkPostion(Cursor cursor) {
+        //初始化几个标记，cursor具体功能笔记中已提到，不一一叙述
         mIsLastItem = cursor.isLast() ? true : false;
         mIsFirstItem = cursor.isFirst() ? true : false;
         mIsOnlyOneItem = (cursor.getCount() == 1);
+        //初始化“多重子文件”“单一子文件”2个标记
         mIsMultiNotesFollowingFolder = false;
         mIsOneNoteFollowingFolder = false;
 
-        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {
+        //主要是设置上诉2标记
+        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {//若是note格式并且不是第一个元素
             int position = cursor.getPosition();
-            if (cursor.moveToPrevious()) {
+            if (cursor.moveToPrevious()) {//获取光标位置后看上一行
                 if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
-                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {
+                        || cursor.getInt(TYPE_COLUMN) == Notes.TYPE_SYSTEM) {//若光标满足系统或note格式
                     if (cursor.getCount() > (position + 1)) {
-                        mIsMultiNotesFollowingFolder = true;
+                        mIsMultiNotesFollowingFolder = true;//若是数据行数大于但前位置+1则设置成正确
                     } else {
-                        mIsOneNoteFollowingFolder = true;
+                        mIsOneNoteFollowingFolder = true;//否则单一文件夹标记为true
                     }
                 }
-                if (!cursor.moveToNext()) {
+                if (!cursor.moveToNext()) {//若不能再往下走则报错
                     throw new IllegalStateException("cursor move to previous but can't move back");
                 }
             }
         }
     }
-
+    ///以下都是获取标记没什么好说的，不过倒数第二个需要说明下，很具体看下面
     public boolean isOneFollowingFolder() {
         return mIsOneNoteFollowingFolder;
     }
@@ -214,6 +203,7 @@ public class NoteItemData {
         return (mAlertDate > 0);
     }
 
+    //若数据父id为保存至文件夹模式的id且满足电话号码单元不为空，则isCallRecord为true
     public boolean isCallRecord() {
         return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
     }
@@ -221,4 +211,4 @@ public class NoteItemData {
     public static int getNoteType(Cursor cursor) {
         return cursor.getInt(TYPE_COLUMN);
     }
-}
+}
\ No newline at end of file
diff --git a/src/ui/NotesListActivity.java b/src/ui/NotesListActivity.java
index e843aec..0813597 100644
--- a/src/ui/NotesListActivity.java
+++ b/src/ui/NotesListActivity.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.app.Activity;
@@ -77,8 +61,12 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.HashSet;
-
-public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+//主界面，一进入就是这个界面
+/**
+ * @author k
+ *
+ */
+public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {   //没有用特定的标签加注释。。。感觉没有什么用
     private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
 
     private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
@@ -89,7 +77,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     private static final int MENU_FOLDER_CHANGE_NAME = 2;
 
-    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
+    private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";  //单行超过80个字符
 
     private enum ListEditState {
         NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
@@ -136,8 +124,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private final static int REQUEST_CODE_NEW_NODE  = 103;
 
     @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
+    // 创建类
+    protected void onCreate(final Bundle savedInstanceState) {  //需要是final类型   根据程序上下文环境，Java关键字final有“这是无法改变的”或者“终态的”含义，它可以修饰非抽象类、非抽象类成员方法和变量。你可能出于两种理解而需要阻止改变：设计或效率。
+        // final类不能被继承，没有子类，final类中的方法默认是final的。
+        //final方法不能被子类的方法覆盖，但可以被继承。
+        //final成员变量表示常量，只能被赋值一次，赋值后值不再改变。
+        //final不能用于修饰构造方法。
+        super.onCreate(savedInstanceState); // 调用父类的onCreate函数
         setContentView(R.layout.note_list);
         initResources();
 
@@ -148,26 +141,32 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     @Override
+    // 返回一些子模块完成的数据交给主Activity处理
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // 结果值 和 要求值 符合要求 
         if (resultCode == RESULT_OK
                 && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
             mNotesListAdapter.changeCursor(null);
         } else {
             super.onActivityResult(requestCode, resultCode, data);
+            // 调用 Activity 的onActivityResult（）
         }
     }
 
     private void setAppInfoFromRawRes() {
+        // Android平台给我们提供了一个SharedPreferences类，它是一个轻量级的存储类，特别适合用于保存软件配置参数。
         SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
         if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) {
             StringBuilder sb = new StringBuilder();
             InputStream in = null;
             try {
-                 in = getResources().openRawResource(R.raw.introduction);
+                // 把资源文件放到应用程序的/raw/raw下，那么就可以在应用中使用getResources获取资源后,
+                // 以openRawResource方法（不带后缀的资源文件名）打开这个文件。
+                in = getResources().openRawResource(R.raw.introduction);
                 if (in != null) {
                     InputStreamReader isr = new InputStreamReader(in);
                     BufferedReader br = new BufferedReader(isr);
-                    char [] buf = new char[1024];
+                    char [] buf = new char[1024];  // 自行定义的数值，使用者不知道有什么意义
                     int len = 0;
                     while ((len = br.read(buf)) > 0) {
                         sb.append(buf, 0, len);
@@ -180,7 +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) {
@@ -190,11 +189,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 }
             }
 
+            // 创建空的WorkingNote
             WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER,
                     AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE,
                     ResourceParser.RED);
             note.setWorkingText(sb.toString());
             if (note.saveNote()) {
+                // 更新保存note的信息
                 sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit();
             } else {
                 Log.e(TAG, "Save introduction note error");
@@ -209,18 +210,21 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         startAsyncNotesListQuery();
     }
 
+    // 初始化资源
     private void initResources() {
-        mContentResolver = this.getContentResolver();
+        mContentResolver = this.getContentResolver(); // 获取应用程序的数据，得到类似数据表的东西
         mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
         mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-        mNotesListView = (ListView) findViewById(R.id.notes_list);
+
+        // findViewById 是安卓编程的定位函数，主要是引用.R文件里的引用名
+        mNotesListView = (ListView) findViewById(R.id.notes_list); // 绑定XML中的ListView，作为Item的容器
         mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null),
                 null, false);
         mNotesListView.setOnItemClickListener(new OnListItemClickListener());
         mNotesListView.setOnItemLongClickListener(this);
         mNotesListAdapter = new NotesListAdapter(this);
         mNotesListView.setAdapter(mNotesListAdapter);
-        mAddNewNote = (Button) findViewById(R.id.btn_new_note);
+        mAddNewNote = (Button) findViewById(R.id.btn_new_note);// 在activity中要获取该按钮
         mAddNewNote.setOnClickListener(this);
         mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener());
         mDispatch = false;
@@ -231,6 +235,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         mModeCallBack = new ModeCallback();
     }
 
+    // 继承自ListView.MultiChoiceModeListener 和 OnMenuItemClickListener
     private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
         private DropdownMenu mDropDownMenu;
         private ActionMode mActionMode;
@@ -259,7 +264,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     (Button) customView.findViewById(R.id.selection_menu),
                     R.menu.note_list_dropdown);
             mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener(){
-                public boolean onMenuItemClick(MenuItem item) {
+                public boolean onMenuItemClick(final MenuItem item) {
                     mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected());
                     updateMenu();
                     return true;
@@ -269,11 +274,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             return true;
         }
 
+        // 更新菜单
         private void updateMenu() {
             int selectedCount = mNotesListAdapter.getSelectedCount();
             // Update dropdown menu
             String format = getResources().getString(R.string.menu_select_title, selectedCount);
-            mDropDownMenu.setTitle(format);
+            mDropDownMenu.setTitle(format); // 更改标题
             MenuItem item = mDropDownMenu.findItem(R.id.action_select_all);
             if (item != null) {
                 if (mNotesListAdapter.isAllSelected()) {
@@ -307,7 +313,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
 
         public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
-                boolean checked) {
+                                              boolean checked) {
             mNotesListAdapter.setCheckedItem(position, checked);
             updateMenu();
         }
@@ -325,14 +331,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     builder.setTitle(getString(R.string.alert_title_delete));
                     builder.setIcon(android.R.drawable.ic_dialog_alert);
                     builder.setMessage(getString(R.string.alert_message_delete_notes,
-                                             mNotesListAdapter.getSelectedCount()));
+                            mNotesListAdapter.getSelectedCount()));
                     builder.setPositiveButton(android.R.string.ok,
-                                             new DialogInterface.OnClickListener() {
-                                                 public void onClick(DialogInterface dialog,
-                                                         int which) {
-                                                     batchDelete();
-                                                 }
-                                             });
+                            new DialogInterface.OnClickListener() {
+                                public void onClick(DialogInterface dialog,
+                                                    int which) {
+                                    batchDelete();
+                                }
+                            });
                     builder.setNegativeButton(android.R.string.cancel, null);
                     builder.show();
                     break;
@@ -366,7 +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
@@ -413,7 +419,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 : NORMAL_SELECTION;
         mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null,
                 Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] {
-                    String.valueOf(mCurrentFolderId)
+                        String.valueOf(mCurrentFolderId)
                 }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
     }
 
@@ -624,7 +630,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                         values.put(NoteColumns.LOCAL_MODIFIED, 1);
                         mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID
                                 + "=?", new String[] {
-                            String.valueOf(mFocusNoteDataItem.getId())
+                                String.valueOf(mFocusNoteDataItem.getId())
                         });
                     }
                 } else if (!TextUtils.isEmpty(name)) {
@@ -664,30 +670,38 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         });
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onBackPressed()
+     * 按返回键时根据情况更改类中的数据
+     */
     @Override
-    public void onBackPressed() {
-        switch (mState) {
-            case SUB_FOLDER:
-                mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-                mState = ListEditState.NOTE_LIST;
-                startAsyncNotesListQuery();
-                mTitleBar.setVisibility(View.GONE);
-                break;
-            case CALL_RECORD_FOLDER:
-                mCurrentFolderId = Notes.ID_ROOT_FOLDER;
-                mState = ListEditState.NOTE_LIST;
-                mAddNewNote.setVisibility(View.VISIBLE);
-                mTitleBar.setVisibility(View.GONE);
-                startAsyncNotesListQuery();
-                break;
-            case NOTE_LIST:
-                super.onBackPressed();
-                break;
-            default:
-                break;
-        }
+    public void onBackPressed() { switch (mState) {
+        case SUB_FOLDER:
+            mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+            mState = ListEditState.NOTE_LIST;
+            startAsyncNotesListQuery();
+            mTitleBar.setVisibility(View.GONE);
+            break;
+        case CALL_RECORD_FOLDER:
+            mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+            mState = ListEditState.NOTE_LIST;
+            mAddNewNote.setVisibility(View.VISIBLE);
+            mTitleBar.setVisibility(View.GONE);
+            startAsyncNotesListQuery();
+            break;
+        case NOTE_LIST:
+            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) {
@@ -700,13 +714,16 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
 
         intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
-            appWidgetId
+                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) {
@@ -726,6 +743,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         super.onContextMenuClosed(menu);
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onContextItemSelected(android.view.MenuItem)
+     * 针对menu中不同的选择进行不同的处理，里面详细注释
+     */
     @Override
     public boolean onContextItemSelected(MenuItem item) {
         if (mFocusNoteDataItem == null) {
@@ -734,10 +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));
@@ -748,7 +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);
@@ -818,12 +839,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         return true;
     }
 
+    /* (non-Javadoc)
+     * @see android.app.Activity#onSearchRequested()
+     * 直接调用startSearch函数
+     */
     @Override
     public boolean onSearchRequested() {
         startSearch(null, false, null /* appData */, false);
         return true;
     }
 
+    /**
+     * 函数功能：实现将便签导出到文本功能
+     */
     private void exportNoteToText() {
         final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this);
         new AsyncTask<Void, Void, Integer>() {
@@ -866,16 +894,27 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }.execute();
     }
 
+    /**
+     * @return
+     * 功能：判断是否正在同步
+     */
     private boolean isSyncMode() {
         return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
     }
 
+    /**
+     * 功能：跳转到PreferenceActivity界面
+     */
     private void startPreferenceActivity() {
         Activity from = getParent() != null ? getParent() : this;
         Intent intent = new Intent(from, NotesPreferenceActivity.class);
         from.startActivityIfNeeded(intent, -1);
     }
 
+    /**
+     * @author k
+     * 函数功能：实现对便签列表项的点击事件（短按）
+     */
     private class OnListItemClickListener implements OnItemClickListener {
 
         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
@@ -917,10 +956,13 @@ 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 + ")";
+                "(" + selection + ") OR (" + NoteColumns.ID + "=" + Notes.ID_ROOT_FOLDER + ")";
 
         mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN,
                 null,
@@ -935,6 +977,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 NoteColumns.MODIFIED_DATE + " DESC");
     }
 
+    /* (non-Javadoc)
+     * @see android.widget.AdapterView.OnItemLongClickListener#onItemLongClick(android.widget.AdapterView, android.view.View, int, long)
+     * 长按某一项时进行的操作
+     * 如果长按的是便签，则通过ActionMode菜单实现；如果长按的是文件夹，则通过ContextMenu菜单实现；
+     *        具体ActionMOde菜单和ContextMenu菜单的详细见精度笔记
+     */
     public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
         if (view instanceof NotesListItem) {
             mFocusNoteDataItem = ((NotesListItem) view).getItemData();
@@ -951,4 +999,4 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
         return false;
     }
-}
+}
\ No newline at end of file
diff --git a/src/ui/NotesListAdapter.java b/src/ui/NotesListAdapter.java
index 51c9cb9..b165769 100644
--- a/src/ui/NotesListAdapter.java
+++ b/src/ui/NotesListAdapter.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;
@@ -23,6 +7,7 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CursorAdapter;
 
+
 import net.micode.notes.data.Notes;
 
 import java.util.Collection;
@@ -31,55 +16,94 @@ import java.util.HashSet;
 import java.util.Iterator;
 
 
+/*
+ * 功能：直译为便签表连接器，继承了CursorAdapter，它为cursor和ListView提供了连接的桥梁。
+ *     所以NotesListAdapter实现的是鼠标和编辑便签链接的桥梁
+ */
 public class NotesListAdapter extends CursorAdapter {
     private static final String TAG = "NotesListAdapter";
     private Context mContext;
     private HashMap<Integer, Boolean> mSelectedIndex;
-    private int mNotesCount;
-    private boolean mChoiceMode;
+    private int mNotesCount;    //便签数
+    private boolean mChoiceMode;   //选择模式标记
 
+    /*
+     * 桌面widget的属性，包括编号和类型
+     */
     public static class AppWidgetAttribute {
         public int widgetId;
         public int widgetType;
     };
 
+    /*
+     * 函数功能：初始化便签链接器
+     * 函数实现：根据传进来的内容设置相关变量
+     */
     public NotesListAdapter(Context context) {
-        super(context, null);
-        mSelectedIndex = new HashMap<Integer, Boolean>();
+        super(context, null);  //父类对象置空
+        mSelectedIndex = new HashMap<Integer, Boolean>();  //新建选项下标的hash表
         mContext = context;
         mNotesCount = 0;
     }
 
     @Override
+    /*
+     * 函数功能：新建一个视图来存储光标所指向的数据
+     * 函数实现：使用兄弟类NotesListItem新建一个项目选项
+     */
     public View newView(Context context, Cursor cursor, ViewGroup parent) {
         return new NotesListItem(context);
     }
 
+    /*
+     * 函数功能：将已经存在的视图和鼠标指向的数据进行捆绑
+     * 函数实现：如下注释
+     */
     @Override
     public void bindView(View view, Context context, Cursor cursor) {
         if (view instanceof NotesListItem) {
+            //若view是NotesListItem的一个实例
             NoteItemData itemData = new NoteItemData(context, cursor);
             ((NotesListItem) view).bind(context, itemData, mChoiceMode,
                     isSelectedItem(cursor.getPosition()));
+            //则新建一个项目选项并且用bind跟将view和鼠标，内容，便签数据捆绑在一起
         }
     }
 
+    /*
+     * 函数功能：设置勾选框
+     * 函数实现：如下注释
+     */
     public void setCheckedItem(final int position, final boolean checked) {
         mSelectedIndex.put(position, checked);
+        //根据定位和是否勾选设置下标
         notifyDataSetChanged();
+        //在修改后刷新activity
     }
 
+    /*
+     * 函数功能：判断单选按钮是否勾选
+     */
     public boolean isInChoiceMode() {
         return mChoiceMode;
     }
 
+    /*
+     * 函数功能：设置单项选项框
+     * 函数实现：重置下标并且根据参数mode设置选项
+     */
     public void setChoiceMode(boolean mode) {
         mSelectedIndex.clear();
         mChoiceMode = mode;
     }
 
+    /*
+     * 函数功能：选择全部选项
+     * 函数实现：如下注释
+     */
     public void selectAll(boolean checked) {
         Cursor cursor = getCursor();
+        //获取光标位置
         for (int i = 0; i < getCount(); i++) {
             if (cursor.moveToPosition(i)) {
                 if (NoteItemData.getNoteType(cursor) == Notes.TYPE_NOTE) {
@@ -87,30 +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();
@@ -128,26 +169,42 @@ public class NotesListAdapter extends CursorAdapter {
         return itemSet;
     }
 
+    /*
+     * 函数功能：获取选项个数
+     * 函数实现：如下注释
+     */
     public int getSelectedCount() {
         Collection<Boolean> values = mSelectedIndex.values();
+        //首先获取选项下标的值
         if (null == values) {
             return 0;
         }
         Iterator<Boolean> iter = values.iterator();
+        //初始化叠加器
         int count = 0;
         while (iter.hasNext()) {
             if (true == iter.next()) {
+                //若value值为真计数+1
                 count++;
             }
         }
         return count;
     }
 
+    /*
+     * 函数功能：判断是否全部选中
+     * 函数实现：如下注释
+     */
     public boolean isAllSelected() {
         int checkedCount = getSelectedCount();
         return (checkedCount != 0 && checkedCount == mNotesCount);
+        //获取选项数看是否等于便签的个数
     }
 
+    /*
+     * 函数功能：判断是否为选项表
+     * 函数实现：通过传递的下标来确定
+     */
     public boolean isSelectedItem(final int position) {
         if (null == mSelectedIndex.get(position)) {
             return false;
@@ -156,29 +213,45 @@ public class NotesListAdapter extends CursorAdapter {
     }
 
     @Override
+    /*
+     * 函数功能：在activity内容发生局部变动的时候回调该函数计算便签的数量
+     * 函数实现：如下注释
+     */
     protected void onContentChanged() {
         super.onContentChanged();
+        //执行基类函数
         calcNotesCount();
     }
 
     @Override
+    /*
+     * 函数功能：在activity光标发生局部变动的时候回调该函数计算便签的数量
+     */
     public void changeCursor(Cursor cursor) {
         super.changeCursor(cursor);
+        //执行基类函数
         calcNotesCount();
     }
 
+    /*
+     * 函数功能：计算便签数量
+     *
+     */
     private void calcNotesCount() {
         mNotesCount = 0;
         for (int i = 0; i < getCount(); i++) {
+            //获取总数同时遍历
             Cursor c = (Cursor) getItem(i);
             if (c != null) {
                 if (NoteItemData.getNoteType(c) == Notes.TYPE_NOTE) {
                     mNotesCount++;
+                    //若该位置不为空并且文本类型为便签就+1
                 }
             } else {
                 Log.e(TAG, "Invalid cursor");
                 return;
             }
+            //否则报错
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/ui/NotesListItem.java b/src/ui/NotesListItem.java
index 1221e80..fa8b3d2 100644
--- a/src/ui/NotesListItem.java
+++ b/src/ui/NotesListItem.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;
@@ -30,37 +14,43 @@ import net.micode.notes.tool.DataUtils;
 import net.micode.notes.tool.ResourceParser.NoteItemBgResources;
 
 
+//创建便签列表项目选项
 public class NotesListItem extends LinearLayout {
-    private ImageView mAlert;
-    private TextView mTitle;
-    private TextView mTime;
-    private TextView mCallName;
-    private NoteItemData mItemData;
-    private CheckBox mCheckBox;
+    private ImageView mAlert;//闹钟图片
+    private TextView mTitle;  //标题
+    private TextView mTime;   //时间
+    private TextView mCallName;    //
+    private NoteItemData mItemData; //标签数据
+    private CheckBox mCheckBox;    //打钩框
 
+    /*初始化基本信息*/
     public NotesListItem(Context context) {
-        super(context);
-        inflate(context, R.layout.note_item, this);
+        super(context);   //super()它的主要作用是调整调用父类构造函数的顺序
+        inflate(context, R.layout.note_item, this);//Inflate可用于将一个xml中定义的布局控件找出来,这里的xml是r。layout
+        //findViewById用于从contentView中查找指定ID的View，转换出来的形式根据需要而定;
         mAlert = (ImageView) findViewById(R.id.iv_alert_icon);
         mTitle = (TextView) findViewById(R.id.tv_title);
         mTime = (TextView) findViewById(R.id.tv_time);
         mCallName = (TextView) findViewById(R.id.tv_name);
         mCheckBox = (CheckBox) findViewById(android.R.id.checkbox);
     }
-
+    ///根据data的属性对各个控件的属性的控制，主要是可见性Visibility，内容setText，格式setTextAppearance
     public void bind(Context context, NoteItemData data, boolean choiceMode, boolean checked) {
         if (choiceMode && data.getType() == Notes.TYPE_NOTE) {
-            mCheckBox.setVisibility(View.VISIBLE);
-            mCheckBox.setChecked(checked);
+            mCheckBox.setVisibility(View.VISIBLE);  ///设置可见行为可见
+            mCheckBox.setChecked(checked);         ///格子打钩
         } else {
             mCheckBox.setVisibility(View.GONE);
         }
 
         mItemData = data;
+        ///设置控件属性，一共三种情况，由data的id和父id是否与保存到文件夹的id一致来决定
         if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
             mCallName.setVisibility(View.GONE);
             mAlert.setVisibility(View.VISIBLE);
+            //设置该textview的style
             mTitle.setTextAppearance(context, R.style.TextAppearancePrimaryItem);
+            //settext为设置内容
             mTitle.setText(context.getString(R.string.call_record_folder_name)
                     + context.getString(R.string.format_folder_files_count, data.getNotesCount()));
             mAlert.setImageResource(R.drawable.call_record);
@@ -69,8 +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);
@@ -78,45 +69,48 @@ 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,
-                                data.getNotesCount()));
+                        data.getNotesCount()));
                 mAlert.setVisibility(View.GONE);
             } 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/ui/NotesPreferenceActivity.java b/src/ui/NotesPreferenceActivity.java
index 07c5f7e..3a1a3de 100644
--- a/src/ui/NotesPreferenceActivity.java
+++ b/src/ui/NotesPreferenceActivity.java
@@ -1,23 +1,8 @@
-/*
- * 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.annotation.SuppressLint;
 import android.app.ActionBar;
 import android.app.AlertDialog;
 import android.content.BroadcastReceiver;
@@ -47,66 +32,93 @@ 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
 
+    @SuppressLint("UnspecifiedRegisterReceiverFlag")
     @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) {
+                //若原账户不为空且当前账户有增加
                 for (Account accountNew : accounts) {
                     boolean found = false;
                     for (Account accountOld : mOriAccounts) {
                         if (TextUtils.equals(accountOld.name, accountNew.name)) {
+                            //更新账户
                             found = true;
                             break;
                         }
                     }
                     if (!found) {
                         setSyncAccount(accountNew.name);
+                        //若是没有找到旧的账户，那么同步账号中就只添加新账户
                         break;
                     }
                 }
@@ -114,58 +126,83 @@ public class NotesPreferenceActivity extends PreferenceActivity {
         }
 
         refreshUI();
+        //刷新标签界面
     }
 
     @Override
+    /*
+     * 函数功能：销毁一个activity
+     * 函数实现：如下注释
+     */
     protected void onDestroy() {
         if (mReceiver != null) {
             unregisterReceiver(mReceiver);
+            //注销接收器
         }
         super.onDestroy();
+        //执行父类的销毁动作
     }
 
+    /*
+     * 函数功能：重新设置账户信息
+     * 函数实现：如下注释
+     */
     private void loadAccountPreference() {
         mAccountCategory.removeAll();
-
+        //销毁所有的分组
         Preference accountPref = new Preference(this);
+        //建立首选项
         final String defaultAccount = getSyncAccountName(this);
         accountPref.setTitle(getString(R.string.preferences_account_title));
         accountPref.setSummary(getString(R.string.preferences_account_summary));
+        //设置首选项的大标题和小标题
         accountPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
             public boolean onPreferenceClick(Preference preference) {
+                //建立监听器
                 if (!GTaskSyncService.isSyncing()) {
                     if (TextUtils.isEmpty(defaultAccount)) {
                         // the first time to set account
+                        //若是第一次建立账户显示选择账户提示对话框
                         showSelectAccountAlertDialog();
                     } else {
                         // if the account has already been set, we need to promp
                         // user about the risk
+                        //若是已经建立则显示修改对话框并进行修改操作
                         showChangeAccountConfirmAlertDialog();
                     }
                 } else {
+                    //若在没有同步的情况下，则在toast中显示不能修改
                     Toast.makeText(NotesPreferenceActivity.this,
-                            R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
+                                    R.string.preferences_toast_cannot_change_account, Toast.LENGTH_SHORT)
                             .show();
                 }
                 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 +210,67 @@ public class NotesPreferenceActivity extends PreferenceActivity {
                     GTaskSyncService.startSync(NotesPreferenceActivity.this);
                 }
             });
+            //若是不同步则设置按钮显示的文本为“立即同步”以及对应监听器
         }
         syncButton.setEnabled(!TextUtils.isEmpty(getSyncAccountName(this)));
+        //设置按键可用还是不可用
 
         // set last sync time
+        // 设置最终同步时间
         if (GTaskSyncService.isSyncing()) {
+            //若是在同步的情况下
             lastSyncTimeView.setText(GTaskSyncService.getProgressString());
             lastSyncTimeView.setVisibility(View.VISIBLE);
+            // 根据当前同步服务器设置时间显示框的文本以及可见性
         } else {
+            //若是非同步情况
             long lastSyncTime = getLastSyncTime(this);
             if (lastSyncTime != 0) {
                 lastSyncTimeView.setText(getString(R.string.preferences_last_sync_time,
                         DateFormat.format(getString(R.string.preferences_last_sync_time_format),
                                 lastSyncTime)));
                 lastSyncTimeView.setVisibility(View.VISIBLE);
+                //则根据最后同步时间的信息来编辑时间显示框的文本内容和可见性
             } else {
+                //若时间为空直接设置为不可见状态
                 lastSyncTimeView.setVisibility(View.GONE);
             }
         }
     }
-
+    /*
+     *函数功能：刷新标签界面
+     *函数实现：调用上文设置账号和设置按键两个函数来实现
+     */
     private void refreshUI() {
         loadAccountPreference();
         loadSyncButton();
     }
 
+    /*
+     * 函数功能：显示账户选择的对话框并进行账户的设置
+     * 函数实现：如下注释
+     */
     private void showSelectAccountAlertDialog() {
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
+        //创建一个新的对话框
 
         View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
         TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
         titleTextView.setText(getString(R.string.preferences_dialog_select_account_title));
         TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
         subtitleTextView.setText(getString(R.string.preferences_dialog_select_account_tips));
-
+        //设置标题以及子标题的内容
         dialogBuilder.setCustomTitle(titleView);
         dialogBuilder.setPositiveButton(null, null);
-
+        //设置对话框的自定义标题，建立一个YES的按钮
         Account[] accounts = getGoogleAccounts();
         String defAccount = getSyncAccountName(this);
-
+        //获取同步账户信息
         mOriAccounts = accounts;
         mHasAddedAccount = false;
 
         if (accounts.length > 0) {
+            //若账户不为空
             CharSequence[] items = new CharSequence[accounts.length];
             final CharSequence[] itemMapping = items;
             int checkedItem = -1;
@@ -224,83 +278,119 @@ public class NotesPreferenceActivity extends PreferenceActivity {
             for (Account account : accounts) {
                 if (TextUtils.equals(account.name, defAccount)) {
                     checkedItem = index;
+                    //在账户列表中查询到所需账户
                 }
                 items[index++] = account.name;
             }
             dialogBuilder.setSingleChoiceItems(items, checkedItem,
+                    //在对话框建立一个单选的复选框
                     new DialogInterface.OnClickListener() {
                         public void onClick(DialogInterface dialog, int which) {
                             setSyncAccount(itemMapping[which].toString());
                             dialog.dismiss();
+                            //取消对话框
                             refreshUI();
                         }
+                        //设置点击后执行的事件，包括检录新同步账户和刷新标签界面
                     });
+            //建立对话框网络版的监听器
         }
 
         View addAccountView = LayoutInflater.from(this).inflate(R.layout.add_account_text, null);
         dialogBuilder.setView(addAccountView);
+        //给新加账户对话框设置自定义样式
 
         final AlertDialog dialog = dialogBuilder.show();
+        //显示对话框
         addAccountView.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 mHasAddedAccount = true;
+                //将新加账户的hash置true
                 Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
+                //建立网络建立组件
                 intent.putExtra(AUTHORITIES_FILTER_KEY, new String[] {
-                    "gmail-ls"
+                        "gmail-ls"
                 });
                 startActivityForResult(intent, -1);
+                //跳回上一个选项
                 dialog.dismiss();
             }
         });
+        //建立新加账户对话框的监听器
     }
 
+    /*
+     * 函数功能：显示账户选择对话框和相关账户操作
+     * 函数实现：如下注释
+     */
     private void showChangeAccountConfirmAlertDialog() {
         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this);
-
+        //创建一个新的对话框
         View titleView = LayoutInflater.from(this).inflate(R.layout.account_dialog_title, null);
         TextView titleTextView = (TextView) titleView.findViewById(R.id.account_dialog_title);
         titleTextView.setText(getString(R.string.preferences_dialog_change_account_title,
                 getSyncAccountName(this)));
         TextView subtitleTextView = (TextView) titleView.findViewById(R.id.account_dialog_subtitle);
         subtitleTextView.setText(getString(R.string.preferences_dialog_change_account_warn_msg));
+        //根据同步修改的账户信息设置标题以及子标题的内容
         dialogBuilder.setCustomTitle(titleView);
-
+        //设置对话框的自定义标题
         CharSequence[] menuItemArray = new CharSequence[] {
                 getString(R.string.preferences_menu_change_account),
                 getString(R.string.preferences_menu_remove_account),
                 getString(R.string.preferences_menu_cancel)
         };
+        //定义一些标记字符串
         dialogBuilder.setItems(menuItemArray, new DialogInterface.OnClickListener() {
+            //设置对话框要显示的一个list，用于显示几个命令时,即change，remove，cancel
             public void onClick(DialogInterface dialog, int which) {
+                //按键功能，由which来决定
                 if (which == 0) {
+                    //进入账户选择对话框
                     showSelectAccountAlertDialog();
                 } else if (which == 1) {
+                    //删除账户并且跟新便签界面
                     removeSyncAccount();
                     refreshUI();
                 }
             }
         });
         dialogBuilder.show();
+        //显示对话框
     }
 
+    /*
+     *函数功能：获取谷歌账户
+     *函数实现：通过账户管理器直接获取
+     */
     private Account[] getGoogleAccounts() {
         AccountManager accountManager = AccountManager.get(this);
         return accountManager.getAccountsByType("com.google");
     }
 
+    /*
+     * 函数功能：设置同步账户
+     * 函数实现：如下注释：
+     */
     private void setSyncAccount(String account) {
         if (!getSyncAccountName(this).equals(account)) {
+            //假如该账号不在同步账号列表中
             SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
             SharedPreferences.Editor editor = settings.edit();
+            //编辑共享的首选项
             if (account != null) {
                 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, account);
             } else {
                 editor.putString(PREFERENCE_SYNC_ACCOUNT_NAME, "");
             }
+            //将该账号加入到首选项中
+
             editor.commit();
+            //提交修改的数据
+
 
-            // clean up last sync time
             setLastSyncTime(this, 0);
+            //将最后同步时间清零
 
             // clean up local gtask related info
             new Thread(new Runnable() {
@@ -311,23 +401,33 @@ 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() {
@@ -338,51 +438,79 @@ 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)) {
+                //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
diff --git a/src/widget/NoteWidgetProvider.java b/src/widget/NoteWidgetProvider.java
index ec6f819..4bae085 100644
--- a/src/widget/NoteWidgetProvider.java
+++ b/src/widget/NoteWidgetProvider.java
@@ -14,119 +14,119 @@
  * limitations under the License.
  */
 
-package net.micode.notes.widget;
-import android.app.PendingIntent;
-import android.appwidget.AppWidgetManager;
-import android.appwidget.AppWidgetProvider;
-import android.content.ContentValues;
-import android.content.Context;
-import android.content.Intent;
-import android.database.Cursor;
-import android.util.Log;
-import android.widget.RemoteViews;
+package net.micode.notes.widget;                //隶属于widget这个包中
+import android.app.PendingIntent;               //在Android.app包中的，用于提供暂缓的服务，当某种条件达到时，就可以执行某些活动
+import android.appwidget.AppWidgetManager;      //继承object类，更新appwidget状态，和获取安装appwidget提供信息，以及其它相关状态信息。
+import android.appwidget.AppWidgetProvider;     //本质是广播作用，用来对widget进行更新
+import android.content.ContentValues;           //此类用于存储ContentResolver 可以处理的一组值，是一些基本类型的值
+import android.content.Context;                 //可以理解为一个接口（抽象类），它提供了有关应用程序的全局信息。从它继承或者从它的直接或间接子类继承，那么继承的子类就可以拿到应用程序的全局信息。
+import android.content.Intent;                  //联系各个Activity的关键对象。告诉android该做什么
+import android.database.Cursor;                 //是数据库指针，用于查询并操作数据
+import android.util.Log;                        //更新删改等的日志文件
+import android.widget.RemoteViews;              //它表示的是一个View结构，可以在其他进程中显示，小部件的旋转效果则是通过不断地更新RemoteViews来实现的
 
 import net.micode.notes.R;
-import net.micode.notes.data.Notes;
-import net.micode.notes.data.Notes.NoteColumns;
-import net.micode.notes.tool.ResourceParser;
-import net.micode.notes.ui.NoteEditActivity;
-import net.micode.notes.ui.NotesListActivity;
-
-public abstract class NoteWidgetProvider extends AppWidgetProvider {
-    public static final String [] PROJECTION = new String [] {
-        NoteColumns.ID,
-        NoteColumns.BG_COLOR_ID,
-        NoteColumns.SNIPPET
+import net.micode.notes.data.Notes;             //引入其他包中类
+import net.micode.notes.data.Notes.NoteColumns; //引入笔记换列的类
+import net.micode.notes.tool.ResourceParser;    //引入工具类
+import net.micode.notes.ui.NoteEditActivity;    //引入ui包中的编辑笔记类
+import net.micode.notes.ui.NotesListActivity;   //引入ui包中的列表活动类
+
+public abstract class NoteWidgetProvider extends AppWidgetProvider {        //继承AppWidgetProvider的抽象类NoteWidgetProvider，可以给子类提供接口
+    public static final String [] PROJECTION = new String [] {              //最终静态字符串数组
+            NoteColumns.ID,                                                     //笔记框ID号
+            NoteColumns.BG_COLOR_ID,                                            //笔记框颜色ID
+            NoteColumns.SNIPPET                                                 //一小段笔记框
     };
 
-    public static final int COLUMN_ID           = 0;
-    public static final int COLUMN_BG_COLOR_ID  = 1;
-    public static final int COLUMN_SNIPPET      = 2;
+    public static final int COLUMN_ID           = 0;                        //最终静态笔记框ID号
+    public static final int COLUMN_BG_COLOR_ID  = 1;                        //最终静态笔记框颜色ID
+    public static final int COLUMN_SNIPPET      = 2;                        //最终静态一小段笔记框
 
-    private static final String TAG = "NoteWidgetProvider";
+    private static final String TAG = "NoteWidgetProvider";                 //最终静态 TAG
 
-    @Override
-    public void onDeleted(Context context, int[] appWidgetIds) {
-        ContentValues values = new ContentValues();
-        values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
+    @Override                                                               //重写
+    public void onDeleted(Context context, int[] appWidgetIds) {                        //方法，删除部件
+        ContentValues values = new ContentValues();                                     //和Bundle类一样，键值对
+        values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);       //通过put来存放数据。大多是基础数据类型
         for (int i = 0; i < appWidgetIds.length; i++) {
-            context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
+            context.getContentResolver().update(Notes.CONTENT_NOTE_URI,             //根据长度批量修改数据，uri表名, 属性键值对，修改对象，修改内容
                     values,
                     NoteColumns.WIDGET_ID + "=?",
                     new String[] { String.valueOf(appWidgetIds[i])});
         }
     }
-
-    private Cursor getNoteWidgetInfo(Context context, int widgetId) {
-        return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
-                PROJECTION,
+    //操作数据库，查询操作
+    private Cursor getNoteWidgetInfo(Context context, int widgetId) {                   //得到一些部件的信息和全局消息，返回类型为游标
+        return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,               //查找数据，并返回含有数据信息的cursor对象。
+                PROJECTION,                                                //参数为 uri 查询表名,查询列名，属性，属性域值，排序
                 NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
                 new String[] { String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER) },
                 null);
     }
 
-    protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+    protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {         //更新部件
         update(context, appWidgetManager, appWidgetIds, false);
     }
 
-    private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
-            boolean privacyMode) {
+    private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,             //隐私模式下更新相关部件
+                        boolean privacyMode) {
         for (int i = 0; i < appWidgetIds.length; i++) {
             if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
                 int bgId = ResourceParser.getDefaultBgId(context);
                 String snippet = "";
-                Intent intent = new Intent(context, NoteEditActivity.class);
-                intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
-                intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
+                Intent intent = new Intent(context, NoteEditActivity.class);    //意图，从context到NoteEditActivity类的意图
+                intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);       //设置标志，当栈顶为活动实例时，重用该实例，不用新建
+                intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]); //传递参数
                 intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
 
-                Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
+                Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);                         //数据库光标，用于读取数据库
                 if (c != null && c.moveToFirst()) {
                     if (c.getCount() > 1) {
-                        Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
+                        Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);      //日志信息，打印错误
                         c.close();
                         return;
                     }
                     snippet = c.getString(COLUMN_SNIPPET);
                     bgId = c.getInt(COLUMN_BG_COLOR_ID);
-                    intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
-                    intent.setAction(Intent.ACTION_VIEW);
+                    intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));        //传递参数
+                    intent.setAction(Intent.ACTION_VIEW);   //隐式intent，设置意图，参数为向用户展示意图。
                 } else {
                     snippet = context.getResources().getString(R.string.widget_havenot_content);
-                    intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
+                    intent.setAction(Intent.ACTION_INSERT_OR_EDIT);  //隐式intent，设置联系人
                 }
 
-                if (c != null) {
+                if (c != null) {        //关闭
                     c.close();
                 }
 
-                RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
-                rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
-                intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
+                RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());  //布局文件layout的远程视图
+                rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));  //设置图像资源，从布局文件layout中找到ID
+                intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);    //产生待定意图
                 /**
                  * Generate the pending intent to start host for the widget
                  */
-                PendingIntent pendingIntent = null;
-                if (privacyMode) {
-                    rv.setTextViewText(R.id.widget_text,
+                PendingIntent pendingIntent = null; //待定意图，等待触发时机
+                if (privacyMode) {                                              //隐私模式
+                    rv.setTextViewText(R.id.widget_text,        //设置视图文本
                             context.getString(R.string.widget_under_visit_mode));
-                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
-                            context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
-                } else {
+                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent( //开始意图启动Activity
+                            context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT); //上下文，请求码，跳转对象，
+                } else {        //FLAG_UPDATE_CURRENT当前描述的PendingIntent如果已经存在，那么它们都会被更新，即它们的Intent中的Extras会被替换成最新的
                     rv.setTextViewText(R.id.widget_text, snippet);
-                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
+                    pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,  //先前的意图
                             PendingIntent.FLAG_UPDATE_CURRENT);
-                }
+                } //FLAG_UPDATE_CURRENT当前描述的PendingIntent如果已经存在，那么它们都会被更新，即它们的Intent中的Extras会被替换成最新的
 
-                rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
-                appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
+                rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);   //启动点击待定意图
+                appWidgetManager.updateAppWidget(appWidgetIds[i], rv);  //更新部件
             }
         }
     }
 
-    protected abstract int getBgResourceId(int bgId);
+    protected abstract int getBgResourceId(int bgId);                   //抽象类获取Bg资源ID
 
-    protected abstract int getLayoutId();
+    protected abstract int getLayoutId();                               //抽象方法获取布局ID
 
-    protected abstract int getWidgetType();
+    protected abstract int getWidgetType();                             //获取部件的种类
 }
diff --git a/src/widget/NoteWidgetProvider_2x.java b/src/widget/NoteWidgetProvider_2x.java
index adcb2f7..2ddd97f 100644
--- a/src/widget/NoteWidgetProvider_2x.java
+++ b/src/widget/NoteWidgetProvider_2x.java
@@ -23,24 +23,24 @@ import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 import net.micode.notes.tool.ResourceParser;
 
-
+//二倍部件
 public class NoteWidgetProvider_2x extends NoteWidgetProvider {
-    @Override
+    @Override           //更新
     public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
         super.update(context, appWidgetManager, appWidgetIds);
     }
 
-    @Override
+    @Override   //获取xml中的二倍部件id
     protected int getLayoutId() {
         return R.layout.widget_2x;
     }
 
-    @Override
+    @Override   //获取资源id
     protected int getBgResourceId(int bgId) {
         return ResourceParser.WidgetBgResources.getWidget2xBgResource(bgId);
     }
 
-    @Override
+    @Override   //获取二倍部件种类
     protected int getWidgetType() {
         return Notes.TYPE_WIDGET_2X;
     }
diff --git a/src/widget/NoteWidgetProvider_4x.java b/src/widget/NoteWidgetProvider_4x.java
index c12a02e..8156006 100644
--- a/src/widget/NoteWidgetProvider_4x.java
+++ b/src/widget/NoteWidgetProvider_4x.java
@@ -23,23 +23,23 @@ import net.micode.notes.R;
 import net.micode.notes.data.Notes;
 import net.micode.notes.tool.ResourceParser;
 
-
+//四倍部件
 public class NoteWidgetProvider_4x extends NoteWidgetProvider {
-    @Override
+    @Override       //更新部件
     public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
         super.update(context, appWidgetManager, appWidgetIds);
     }
-
+    //获取四倍部件id
     protected int getLayoutId() {
         return R.layout.widget_4x;
     }
 
-    @Override
+    @Override       //获取xml资源id
     protected int getBgResourceId(int bgId) {
         return ResourceParser.WidgetBgResources.getWidget4xBgResource(bgId);
     }
 
-    @Override
+    @Override       //获取四倍部件种类
     protected int getWidgetType() {
         return Notes.TYPE_WIDGET_4X;
     }