diff --git a/src/Notes-master/app/src/main/java/net/micode/notes/data/Notes.java b/src/Notes-master/app/src/main/java/net/micode/notes/data/Notes.java
index 5d5bc36..ab926af 100644
--- a/src/Notes-master/app/src/main/java/net/micode/notes/data/Notes.java
+++ b/src/Notes-master/app/src/main/java/net/micode/notes/data/Notes.java
@@ -18,15 +18,17 @@ package net.micode.notes.data;
 
 import android.net.Uri;
 
-// Notes 类中定义了很多常量，这些常量大多是int型和string型
+/*
+*功能描述：Notes 类中定义一些常量，用于构造便签内容及类型
+*/
 public class Notes {
-    public static final String AUTHORITY = "micode_notes";
-    public static final String TAG = "Notes";
+    public static final String AUTHORITY = "micode_notes"; // 定义内容提供器的权限
+    public static final String TAG = "Notes";// 定义日志标签
 
-    //以下三个常量对NoteColumns.TYPE的值进行设置时会用到
-    public static final int TYPE_NOTE     = 0;
-    public static final int TYPE_FOLDER   = 1;
-    public static final int TYPE_SYSTEM   = 2;
+    //以下三个常量对NoteColumns.TYPE的值进行设置，对应不同的便签类型
+    public static final int TYPE_NOTE     = 0;// 便签类型为普通便签
+    public static final int TYPE_FOLDER   = 1;// 便签类型为文件夹
+    public static final int TYPE_SYSTEM   = 2;// 便签类型为系统文件夹
 
     /**
      * Following IDs are system folders' identifiers
@@ -34,181 +36,190 @@ public class Notes {
      * {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
      * {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
      */
-    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;
 
+    // 系统文件夹的标识符
+    public static final int ID_ROOT_FOLDER = 0;// 默认文件夹
+    public static final int ID_TEMPARAY_FOLDER = -1;// 没有所属文件夹的便签
+    public static final int ID_CALL_RECORD_FOLDER = -2;// 存储通话记录的文件夹
+    public static final int ID_TRASH_FOLER = -3;// 垃圾箱文件夹
+
+    // 定义设置中的参数常量
+    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";// Widget ID
+    public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";// Widget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
+
+    // 定义Widget类型常量
+    public static final int TYPE_WIDGET_INVALIDE      = -1;// 无效的Widget类型
+    public static final int TYPE_WIDGET_2X            = 0;// 2x2大小的Widget
+    public static final int TYPE_WIDGET_4X            = 1;// 4x4大小的Widget
+
+    // 定义便签数据类型常量
     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;// 文本便签数据类型
+        public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;// 电话便签数据类型
     }
 
     /**
      * Uri to query all notes and folders
      */
-    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");// 查询所有便签和文件夹的标识符
 
     /**
      * Uri to query data
      */
-    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");//定义查找数据的指针。
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");// 查询数据的标识符
 
-    // 定义NoteColumns的常量,用于后面创建数据库的表头
+    /*
+     * 功能描述：定义NoteColumns接口数据的常量，用于创建数据库表头
+     */
     public interface NoteColumns {
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String ID = "_id";
+        public static final String ID = "_id";// 行的唯一标识符
 
         /**
          * The parent's id for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String PARENT_ID = "parent_id";
+        public static final String PARENT_ID = "parent_id";// 父级的ID
 
         /**
          * Created data for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String CREATED_DATE = "created_date";
+        public static final String CREATED_DATE = "created_date";// 创建日期
 
         /**
          * Latest modified date
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String MODIFIED_DATE = "modified_date";
+        public static final String MODIFIED_DATE = "modified_date";// 最后修改日期
 
 
         /**
          * Alert date
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String ALERTED_DATE = "alert_date";
+        public static final String ALERTED_DATE = "alert_date";// 提醒日期
 
         /**
          * Folder's name or text content of note
          * <P> Type: TEXT </P>
          */
-        public static final String SNIPPET = "snippet";
+        public static final String SNIPPET = "snippet";// 文件夹名称或便签的文本内容
 
         /**
          * Note's widget id
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String WIDGET_ID = "widget_id";
+        public static final String WIDGET_ID = "widget_id";// 便签的Widget ID
 
         /**
          * Note's widget type
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String WIDGET_TYPE = "widget_type";
+        public static final String WIDGET_TYPE = "widget_type";// 便签的Widget类型
 
         /**
          * Note's background color's id
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String BG_COLOR_ID = "bg_color_id";
+        public static final String BG_COLOR_ID = "bg_color_id";// 便签的背景颜色ID
 
         /**
          * For text note, it doesn't has attachment, for multi-media
          * note, it has at least one attachment
          * <P> Type: INTEGER </P>
          */
-        public static final String HAS_ATTACHMENT = "has_attachment";
+        public static final String HAS_ATTACHMENT = "has_attachment";// 是否有附件
 
         /**
          * Folder's count of notes
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String NOTES_COUNT = "notes_count";
+        public static final String NOTES_COUNT = "notes_count";// 文件夹中的便签数量
 
         /**
          * The file type: folder or note
          * <P> Type: INTEGER </P>
          */
-        public static final String TYPE = "type";
+        public static final String TYPE = "type";// 文件类型：文件夹或便签
 
         /**
          * The last sync id
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String SYNC_ID = "sync_id";
+        public static final String SYNC_ID = "sync_id";// 最后同步的ID
 
         /**
          * Sign to indicate local modified or not
          * <P> Type: INTEGER </P>
          */
-        public static final String LOCAL_MODIFIED = "local_modified";
+        public static final String LOCAL_MODIFIED = "local_modified";// 标识是否本地修改
 
         /**
          * Original parent id before moving into temporary folder
          * <P> Type : INTEGER </P>
          */
-        public static final String ORIGIN_PARENT_ID = "origin_parent_id";
+        public static final String ORIGIN_PARENT_ID = "origin_parent_id";// 移动到临时文件夹之前的原始父级ID
 
         /**
          * The gtask id
          * <P> Type : TEXT </P>
          */
-        public static final String GTASK_ID = "gtask_id";
+        public static final String GTASK_ID = "gtask_id";// Google任务ID
 
         /**
          * The version code
          * <P> Type : INTEGER (long) </P>
          */
-        public static final String VERSION = "version";
+        public static final String VERSION = "version";// 版本号
     }//定义便签的属性的常量
 
-    // 定义DataColumns的常量,用于后面创建数据库的表头
+    /*
+    * 功能描述：定义DataColumns接口数据的常量，用于创建数据库表头
+    */
     public interface DataColumns {
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String ID = "_id";
+        public static final String ID = "_id";// 标识符
 
         /**
          * The MIME type of the item represented by this row.
          * <P> Type: Text </P>
          */
-        public static final String MIME_TYPE = "mime_type";
+        public static final String MIME_TYPE = "mime_type";// 数据的MIME类型
 
         /**
          * The reference id to note that this data belongs to
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String NOTE_ID = "note_id";
+        public static final String NOTE_ID = "note_id";// 数据ID
 
         /**
          * Created data for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String CREATED_DATE = "created_date";
+        public static final String CREATED_DATE = "created_date";// 创建日期
 
         /**
          * Latest modified date
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String MODIFIED_DATE = "modified_date";
+        public static final String MODIFIED_DATE = "modified_date";// 最后修改日期
 
         /**
          * Data's content
          * <P> Type: TEXT </P>
          */
-        public static final String CONTENT = "content";
+        public static final String CONTENT = "content";// 内容
 
 
         /**
@@ -216,70 +227,77 @@ public class Notes {
          * integer data type
          * <P> Type: INTEGER </P>
          */
-        public static final String DATA1 = "data1";
+        public static final String DATA1 = "data1";// 通用数据1
 
         /**
          * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
          * integer data type
          * <P> Type: INTEGER </P>
          */
-        public static final String DATA2 = "data2";
+        public static final String DATA2 = "data2";// 通用数据2
 
         /**
          * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
-        public static final String DATA3 = "data3";
+        public static final String DATA3 = "data3";// 通用数据3
 
         /**
          * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
-        public static final String DATA4 = "data4";
+        public static final String DATA4 = "data4";// 通用数据4
 
         /**
          * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
          * TEXT data type
          * <P> Type: TEXT </P>
          */
-        public static final String DATA5 = "data5";
-    }//定义存储便签内容数据
+        public static final String DATA5 = "data5";// 通用数据5
+    }
+    //定义存储便签内容数据
 
+    /*
+    * 功能描述：定义了文本便签的数据结构
+    */
     public static final class TextNote implements DataColumns {
         /**
          * Mode to indicate the text in check list mode or not
          * <P> Type: Integer 1:check list mode 0: normal mode </P>
          */
-        public static final String MODE = DATA1;
+        public static final String MODE = DATA1;// 模式
 
-        public static final int MODE_CHECK_LIST = 1;
+        public static final int MODE_CHECK_LIST = 1;// 待办清单模式
 
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";// 内容类型
 
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";// 单个条目的内容类型
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
-    }//文本内容的数据结构
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");// 查询文本便签的URI
+    }
 
+    /*
+    * 功能描述：定义电话便签的数据结构
+    */
     public static final class CallNote implements DataColumns {
         /**
          * Call date for this record
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String CALL_DATE = DATA1;
+        public static final String CALL_DATE = DATA1;// 通话日期
 
         /**
          * Phone number for this record
          * <P> Type: TEXT </P>
          */
-        public static final String PHONE_NUMBER = DATA3;
+        public static final String PHONE_NUMBER = DATA3;// 电话号码
 
-        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
+        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";// 内容类型
 
-        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
+        public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";// 单个条目的内容类型
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
-    }//电话内容的数据结构
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");// 查询电话便签的URI
+    }
 }