diff --git a/doc/report.docx b/doc/report.docx
index e05d44b..85c8705 100644
Binary files a/doc/report.docx and b/doc/report.docx differ
diff --git a/src/main/java/net/micode/notes/data/Contact.java b/src/main/java/net/micode/notes/data/Contact.java
index d97ac5d..1e04184 100644
--- a/src/main/java/net/micode/notes/data/Contact.java
+++ b/src/main/java/net/micode/notes/data/Contact.java
@@ -25,24 +25,24 @@ import android.util.Log;
 
 import java.util.HashMap;
 
-public class Contact {
+public class Contact {//定义一个Contact类，类别标签为Contact，包含一个用于存储用户信息的HashMap
     private static HashMap<String, String> sContactCache;
     private static final String TAG = "Contact";
-
+//定义静态常量，用于查询指定联系人
     private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
     + ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
     + " AND " + Data.RAW_CONTACT_ID + " IN "
             + "(SELECT raw_contact_id "
             + " FROM phone_lookup"
             + " WHERE min_match = '+')";
-
+//定义一个静态方法getContact，可以通过Contact对象以及电话号码查询联系人。
     public static String getContact(Context context, String phoneNumber) {
-        if(sContactCache == null) {
+        if(sContactCache == null) {//不存在这个联系人则新建一个存储信息
             sContactCache = new HashMap<String, String>();
         }
 
-        if(sContactCache.containsKey(phoneNumber)) {
-            return sContactCache.get(phoneNumber);
+        if(sContactCache.containsKey(phoneNumber)) {//如果已经包含电话号码作为关键字对应的用户
+            return sContactCache.get(phoneNumber);//直接返回用户的名字，get返回名字
         }
 
         String selection = CALLER_ID_SELECTION.replace("+",
diff --git a/src/main/java/net/micode/notes/data/Notes.java b/src/main/java/net/micode/notes/data/Notes.java
index f240604..fddf75c 100644
--- a/src/main/java/net/micode/notes/data/Notes.java
+++ b/src/main/java/net/micode/notes/data/Notes.java
@@ -17,7 +17,7 @@
 package net.micode.notes.data;
 
 import android.net.Uri;
-public class Notes {
+public class Notes {//定义Nodes类，初始化参数，都赋值成静态量
     public static final String AUTHORITY = "micode_notes";
     public static final String TAG = "Notes";
     public static final int TYPE_NOTE     = 0;
@@ -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");//指定笔记的路径
 
     /**
      * 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");//用于指定数据的路径，类似上面
 
-    public interface NoteColumns {
+    public interface NoteColumns {//定义笔记集ID、父集ID、创建日期，修改日期等等列名称以及类型，做初始化
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
@@ -167,7 +167,7 @@ public class Notes {
         public static final String VERSION = "version";
     }
 
-    public interface DataColumns {
+    public interface DataColumns {//定义接口，给每行数据ID，类型，所属笔记集ID，内容数据等等做定义
         /**
          * The unique ID for a row
          * <P> Type: INTEGER (long) </P>
@@ -241,20 +241,20 @@ public class Notes {
         public static final String DATA5 = "data5";
     }
 
-    public static final class TextNote implements DataColumns {
+    public static final class TextNote implements DataColumns {//实现DataColumn接口，为数据库查询操作提供数据列名称
         /**
          * Mode to indicate the text in check list mode or not
          * <P> Type: Integer 1:check list mode 0: normal mode </P>
          */
         public static final String MODE = DATA1;
 
-        public static final int MODE_CHECK_LIST = 1;
+        public static final int MODE_CHECK_LIST = 1;//表示当前文本是否还处于检查列清单的模式
 
         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");//指定路径
     }
 
     public static final class CallNote implements DataColumns {
diff --git a/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
index ffe5d57..042c2d9 100644
--- a/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
+++ b/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java
@@ -27,7 +27,7 @@ import net.micode.notes.data.Notes.DataConstants;
 import net.micode.notes.data.Notes.NoteColumns;
 
 
-public class NotesDatabaseHelper extends SQLiteOpenHelper {
+public class NotesDatabaseHelper extends SQLiteOpenHelper { //定义数据库相关的名称以及标签
     private static final String DB_NAME = "note.db";
 
     private static final int DB_VERSION = 4;
@@ -42,7 +42,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
 
     private static NotesDatabaseHelper mInstance;
 
-    private static final String CREATE_NOTE_TABLE_SQL =
+    private static final String CREATE_NOTE_TABLE_SQL =//规范定义数据库存储信息的格式以及组成部分
         "CREATE TABLE " + TABLE.NOTE + "(" +
             NoteColumns.ID + " INTEGER PRIMARY KEY," +
             NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
@@ -85,7 +85,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     /**
      * Increase folder's note count when move note to the folder
      */
-    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =//设置触发器，在笔记集更新的时候增加数量1
         "CREATE TRIGGER increase_folder_count_on_update "+
         " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
         " BEGIN " +
@@ -97,7 +97,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     /**
      * Decrease folder's note count when move note from folder
      */
-    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =//类似的设置触发器，在笔记集更新的时候减少数量1
         "CREATE TRIGGER decrease_folder_count_on_update " +
         " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
         " BEGIN " +
@@ -110,7 +110,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     /**
      * Increase folder's note count when insert new note to the folder
      */
-    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
+    private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =//设置触发器，在笔记集创建的时候增加数量1
         "CREATE TRIGGER increase_folder_count_on_insert " +
         " AFTER INSERT ON " + TABLE.NOTE +
         " BEGIN " +
@@ -122,7 +122,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     /**
      * Decrease folder's note count when delete note from the folder
      */
-    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
+    private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =//设置触发器，在笔记集删除文件的时候-1
         "CREATE TRIGGER decrease_folder_count_on_delete " +
         " AFTER DELETE ON " + TABLE.NOTE +
         " BEGIN " +
@@ -135,7 +135,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     /**
      * Update note's content when insert data with type {@link DataConstants#NOTE}
      */
-    private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
+    private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =//设置触发器用于在笔记中数据更改时进行相应ID，字段等的更新
         "CREATE TRIGGER update_note_content_on_insert " +
         " AFTER INSERT ON " + TABLE.DATA +
         " WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
@@ -210,14 +210,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
         super(context, DB_NAME, null, DB_VERSION);
     }
 
-    public void createNoteTable(SQLiteDatabase db) {
+    public void createNoteTable(SQLiteDatabase db) {//创建并管理日志信息表
         db.execSQL(CREATE_NOTE_TABLE_SQL);
         reCreateNoteTableTriggers(db);
         createSystemFolder(db);
         Log.d(TAG, "note table has been created");
     }
 
-    private void reCreateNoteTableTriggers(SQLiteDatabase db) {
+    private void reCreateNoteTableTriggers(SQLiteDatabase db) {//重置触发器
         db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
         db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
         db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
@@ -301,7 +301,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper {
     }
 
     @Override
-    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {//用于检查并进行数据库版本的更新，保障版本控制
         boolean reCreateTriggers = false;
         boolean skipV2 = false;
 
diff --git a/src/main/java/net/micode/notes/data/NotesProvider.java b/src/main/java/net/micode/notes/data/NotesProvider.java
index edb0a60..b29c6fd 100644
--- a/src/main/java/net/micode/notes/data/NotesProvider.java
+++ b/src/main/java/net/micode/notes/data/NotesProvider.java
@@ -35,7 +35,7 @@ import net.micode.notes.data.Notes.NoteColumns;
 import net.micode.notes.data.NotesDatabaseHelper.TABLE;
 
 
-public class NotesProvider extends ContentProvider {
+public class NotesProvider extends ContentProvider {//定义URL以及匹配规则
     private static final UriMatcher mMatcher;
 
     private NotesDatabaseHelper mHelper;
@@ -86,12 +86,12 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
-    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,//执行数据库查询操作
             String sortOrder) {
         Cursor c = null;
         SQLiteDatabase db = mHelper.getReadableDatabase();
         String id = null;
-        switch (mMatcher.match(uri)) {
+        switch (mMatcher.match(uri)) {//匹配数据库查询关键字
             case URI_NOTE:
                 c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
                         sortOrder);
@@ -148,7 +148,7 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
-    public Uri insert(Uri uri, ContentValues values) {
+    public Uri insert(Uri uri, ContentValues values) {//insert向数据库中插入一条数据信息值
         SQLiteDatabase db = mHelper.getWritableDatabase();
         long dataId = 0, noteId = 0, insertedId = 0;
         switch (mMatcher.match(uri)) {
@@ -182,7 +182,8 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
-    public int delete(Uri uri, String selection, String[] selectionArgs) {
+    public int delete(Uri uri, String selection, String[] selectionArgs) {//实现删除操作
+    /*这两个参数通常在一起使用，以定义一个特定的删除操作。selection 定义了哪些数据应该被删除，而 selectionArgs 为 selection 中的占位符提供了具体的值。*/
         int count = 0;
         String id = null;
         SQLiteDatabase db = mHelper.getWritableDatabase();
@@ -228,7 +229,7 @@ public class NotesProvider extends ContentProvider {
     }
 
     @Override
-    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {//更新
         int count = 0;
         String id = null;
         SQLiteDatabase db = mHelper.getWritableDatabase();
diff --git a/src/main/java/net/micode/notes/gtask/data/MetaData.java b/src/main/java/net/micode/notes/gtask/data/MetaData.java
index 3a2050b..e7f8fb7 100644
--- a/src/main/java/net/micode/notes/gtask/data/MetaData.java
+++ b/src/main/java/net/micode/notes/gtask/data/MetaData.java
@@ -50,7 +50,7 @@ public class MetaData extends Task {
     }
 
     @Override
-    public void setContentByRemoteJSON(JSONObject js) {
+    public void setContentByRemoteJSON(JSONObject js) {//用远程的json
         super.setContentByRemoteJSON(js);
         if (getNotes() != null) {
             try {
@@ -64,7 +64,7 @@ public class MetaData extends Task {
     }
 
     @Override
-    public void setContentByLocalJSON(JSONObject js) {
+    public void setContentByLocalJSON(JSONObject js) {//这几个函数都是通过一部分已知的项推算其他未知的
         // this function should not be called
         throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
     }
diff --git a/src/main/java/net/micode/notes/gtask/data/Node.java b/src/main/java/net/micode/notes/gtask/data/Node.java
index 63950e0..3a11067 100644
--- a/src/main/java/net/micode/notes/gtask/data/Node.java
+++ b/src/main/java/net/micode/notes/gtask/data/Node.java
@@ -64,9 +64,9 @@ public abstract class Node {
 
     public abstract JSONObject getLocalJSONFromContent();
 
-    public abstract int getSyncAction(Cursor c);
+    public abstract int getSyncAction(Cursor c);//根据当前指针刷新缓冲区
 
-    public void setGid(String gid) {
+    public void setGid(String gid) {//定义各项简单查询操作的返回值
         this.mGid = gid;
     }
 
@@ -82,7 +82,7 @@ public abstract class Node {
         this.mDeleted = deleted;
     }
 
-    public String getGid() {
+    public String getGid() {//this保证指向的还是当前的对象
         return this.mGid;
     }
 
diff --git a/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java b/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
index 15504be..83424dc 100644
--- a/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
+++ b/src/main/java/net/micode/notes/gtask/exception/ActionFailureException.java
@@ -16,7 +16,7 @@
 
 package net.micode.notes.gtask.exception;
 
-public class ActionFailureException extends RuntimeException {
+public class ActionFailureException extends RuntimeException {//异常处理程序，定义了全部可能参数下抛出错误
     private static final long serialVersionUID = 4425249765923293627L;
 
     public ActionFailureException() {
diff --git a/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java b/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
index b08cfb1..66d6749 100644
--- a/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
+++ b/src/main/java/net/micode/notes/gtask/exception/NetworkFailureException.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package net.micode.notes.gtask.exception;
+package net.micode.notes.gtask.exception;//调用完成异常处理
 
 public class NetworkFailureException extends Exception {
     private static final long serialVersionUID = 2107610287180234136L;