diff --git a/app/src/main/java/net/micode/notes/data/Notes.java b/app/src/main/java/net/micode/notes/data/Notes.java
index f240604..922c017 100644
--- a/app/src/main/java/net/micode/notes/data/Notes.java
+++ b/app/src/main/java/net/micode/notes/data/Notes.java
@@ -17,9 +17,9 @@
 package net.micode.notes.data;
 
 import android.net.Uri;
-public class Notes {
-    public static final String AUTHORITY = "micode_notes";
-    public static final String TAG = "Notes";
+public class Notes {                                                                                //定义类，为模块的其他类提供变量定义
+    public static final String AUTHORITY = "micode_notes";                                          //设置AUTHORITY
+    public static final String TAG = "Notes";                                                       //设置TAG
     public static final int TYPE_NOTE     = 0;
     public static final int TYPE_FOLDER   = 1;
     public static final int TYPE_SYSTEM   = 2;
@@ -46,7 +46,7 @@ public class Notes {
     public static final int TYPE_WIDGET_2X            = 0;
     public static final int TYPE_WIDGET_4X            = 1;
 
-    public static class DataConstants {
+    public static class DataConstants {                                                             //获取记录
         public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
         public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
     }
@@ -54,14 +54,14 @@ public class Notes {
     /**
      * Uri to query all notes and folders
      */
-    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
+    public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");//查询所有笔记与文件的uri
 
     /**
      * Uri to query data
      */
-    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
+    public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");//查询数据的uri
 
-    public interface NoteColumns {
+    public interface NoteColumns {                                                                  //定义便签变量接口
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
@@ -72,50 +72,50 @@ public class Notes {
          * The parent's id for note or folder
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String PARENT_ID = "parent_id";
+        public static final String PARENT_ID = "parent_id";                                         //父文件夹的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";                                   //表示文件夹或便签创建日期
 
         /**
          * Latest modified date
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String MODIFIED_DATE = "modified_date";
+        public static final String MODIFIED_DATE = "modified_date";                                 //便签的最新的修改日期
 
 
         /**
          * 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的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widget的类型
 
         /**
          * 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";                                     //背景颜色代号
 
         /**
          * For text note, it doesn't has attachment, for multi-media
@@ -128,31 +128,31 @@ public class Notes {
          * 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";                                     //文件夹内的便签数
 
         /**
          * 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，是文件夹或便签
 
         /**
          * 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";                                             //最后一次同步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";                               //本地修改名称标识
 
         /**
          * 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";                           //移动文件时文件的前父类文件夹
 
         /**
          * The gtask id
@@ -164,10 +164,10 @@ public class Notes {
          * The version code
          * <P> Type : INTEGER (long) </P>
          */
-        public static final String VERSION = "version";
+        public static final String VERSION = "version";                                             //版本名称
     }
 
-    public interface DataColumns {
+    public interface DataColumns {                                                                  //定义数据变量接口
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
@@ -184,25 +184,25 @@ public class Notes {
          * 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";                                             //便签名称
 
         /**
          * 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";                                   //创建文件夹或者便签的名称
 
         /**
          * 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";                                             //便签内容数据
 
 
         /**
@@ -210,7 +210,7 @@ public class Notes {
          * integer data type
          * <P> Type: INTEGER </P>
          */
-        public static final String DATA1 = "data1";
+        public static final String DATA1 = "data1";                                                 //不同类型的通用数据列，用于可能的存储与查找
 
         /**
          * Generic data column, the meaning is {@link #MIMETYPE} specific, used for
@@ -244,17 +244,17 @@ public class Notes {
     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>
+         * <P> Type: Integer 1:check list mode 0: normal mode </P>                                  //1为列表检查模式，0为普通模式
          */
-        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;                                                //列表检查模式
 
         public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
 
         public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
 
-        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
+        public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");//访问数据表uri
     }
 
     public static final class CallNote implements DataColumns {
@@ -262,18 +262,18 @@ public class Notes {
          * Call date for this record
          * <P> Type: INTEGER (long) </P>
          */
-        public static final String CALL_DATE = DATA1;
+        public static final String CALL_DATE = DATA1;                                               //呼叫数据
 
         /**
          * Phone number for this record
          * <P> Type: TEXT </P>
          */
-        public static final String PHONE_NUMBER = DATA3;
+        public static final String PHONE_NUMBER = DATA3;                                            //呼叫号码
 
         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 Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");//访问电话记录uri
     }
 }