diff --git a/src/main/java/net/micode/notes/ui/NoteEditText.java b/src/main/java/net/micode/notes/ui/NoteEditText.java
index 2afe2a8..14c3b1d 100644
--- a/src/main/java/net/micode/notes/ui/NoteEditText.java
+++ b/src/main/java/net/micode/notes/ui/NoteEditText.java
@@ -37,7 +37,7 @@ import net.micode.notes.R;
 import java.util.HashMap;
 import java.util.Map;
 
-public class NoteEditText extends EditText {
+public class NoteEditText extends EditText {//继承自EditText
     private static final String TAG = "NoteEditText";
     private int mIndex;
     private int mSelectionStartBeforeDelete;
@@ -56,51 +56,51 @@ public class NoteEditText extends EditText {
     /**
      * Call by the {@link NoteEditActivity} to delete or add edit text
      */
-    public interface OnTextViewChangeListener {
+    public interface OnTextViewChangeListener {//接口
         /**
          * Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
          * and the text is null
          */
-        void onEditTextDelete(int index, String text);
+        void onEditTextDelete(int index, String text);//删除当前的edittext
 
         /**
          * Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
          * happen
          */
-        void onEditTextEnter(int index, String text);
+        void onEditTextEnter(int index, String text);//在当前的edittext后面添加edittext
 
         /**
          * Hide or show item option when text change
          */
-        void onTextChange(int index, boolean hasText);
+        void onTextChange(int index, boolean hasText);//隐藏或显示item选项
     }
 
-    private OnTextViewChangeListener mOnTextViewChangeListener;
+    private OnTextViewChangeListener mOnTextViewChangeListener;//接口对象
 
-    public NoteEditText(Context context) {
+    public NoteEditText(Context context) {//构造函数
         super(context, null);
         mIndex = 0;
     }
 
     public void setIndex(int index) {
         mIndex = index;
-    }
+    }//设置index
 
-    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
+    public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {//设置接口对象
         mOnTextViewChangeListener = listener;
     }
 
-    public NoteEditText(Context context, AttributeSet attrs) {
+    public NoteEditText(Context context, AttributeSet attrs) {//构造函数
         super(context, attrs, android.R.attr.editTextStyle);
     }
 
-    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
+    public NoteEditText(Context context, AttributeSet attrs, int defStyle) {//构造函数
         super(context, attrs, defStyle);
         // TODO Auto-generated constructor stub
     }
 
     @Override
-    public boolean onTouchEvent(MotionEvent event) {
+    public boolean onTouchEvent(MotionEvent event) {//触摸事件
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
 
@@ -122,7 +122,7 @@ public class NoteEditText extends EditText {
     }
 
     @Override
-    public boolean onKeyDown(int keyCode, KeyEvent event) {
+    public boolean onKeyDown(int keyCode, KeyEvent event) {//按键事件
         switch (keyCode) {
             case KeyEvent.KEYCODE_ENTER:
                 if (mOnTextViewChangeListener != null) {
@@ -139,7 +139,7 @@ public class NoteEditText extends EditText {
     }
 
     @Override
-    public boolean onKeyUp(int keyCode, KeyEvent event) {
+    public boolean onKeyUp(int keyCode, KeyEvent event) {//按键事件
         switch(keyCode) {
             case KeyEvent.KEYCODE_DEL:
                 if (mOnTextViewChangeListener != null) {
@@ -168,7 +168,7 @@ public class NoteEditText extends EditText {
     }
 
     @Override
-    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
+    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {//焦点改变事件
         if (mOnTextViewChangeListener != null) {
             if (!focused && TextUtils.isEmpty(getText())) {
                 mOnTextViewChangeListener.onTextChange(mIndex, false);
@@ -180,7 +180,7 @@ public class NoteEditText extends EditText {
     }
 
     @Override
-    protected void onCreateContextMenu(ContextMenu menu) {
+    protected void onCreateContextMenu(ContextMenu menu) {//创建上下文菜单
         if (getText() instanceof Spanned) {
             int selStart = getSelectionStart();
             int selEnd = getSelectionEnd();
diff --git a/src/main/java/net/micode/notes/ui/NoteItemData.java b/src/main/java/net/micode/notes/ui/NoteItemData.java
index 0f5a878..b882e72 100644
--- a/src/main/java/net/micode/notes/ui/NoteItemData.java
+++ b/src/main/java/net/micode/notes/ui/NoteItemData.java
@@ -27,7 +27,7 @@ import net.micode.notes.tool.DataUtils;
 
 
 public class NoteItemData {
-    static final String [] PROJECTION = new String [] {
+    static final String [] PROJECTION = new String [] {//投影
         NoteColumns.ID,
         NoteColumns.ALERTED_DATE,
         NoteColumns.BG_COLOR_ID,
@@ -76,7 +76,7 @@ public class NoteItemData {
     private boolean mIsOneNoteFollowingFolder;
     private boolean mIsMultiNotesFollowingFolder;
 
-    public NoteItemData(Context context, Cursor cursor) {
+    public NoteItemData(Context context, Cursor cursor) {//构造函数
         mId = cursor.getLong(ID_COLUMN);
         mAlertDate = cursor.getLong(ALERTED_DATE_COLUMN);
         mBgColorId = cursor.getInt(BG_COLOR_ID_COLUMN);
@@ -109,14 +109,14 @@ public class NoteItemData {
         checkPostion(cursor);
     }
 
-    private void checkPostion(Cursor cursor) {
+    private void checkPostion(Cursor cursor) {//检查位置
         mIsLastItem = cursor.isLast() ? true : false;
         mIsFirstItem = cursor.isFirst() ? true : false;
         mIsOnlyOneItem = (cursor.getCount() == 1);
         mIsMultiNotesFollowingFolder = false;
         mIsOneNoteFollowingFolder = false;
 
-        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {
+        if (mType == Notes.TYPE_NOTE && !mIsFirstItem) {//如果是笔记并且不是第一个
             int position = cursor.getPosition();
             if (cursor.moveToPrevious()) {
                 if (cursor.getInt(TYPE_COLUMN) == Notes.TYPE_FOLDER
@@ -136,89 +136,89 @@ public class NoteItemData {
 
     public boolean isOneFollowingFolder() {
         return mIsOneNoteFollowingFolder;
-    }
+    }//是否是一个文件夹
 
     public boolean isMultiFollowingFolder() {
         return mIsMultiNotesFollowingFolder;
-    }
+    }//是否是多个文件夹
 
     public boolean isLast() {
         return mIsLastItem;
-    }
+    }//是否是最后一个
 
     public String getCallName() {
         return mName;
-    }
+    }//获取呼叫名字
 
     public boolean isFirst() {
         return mIsFirstItem;
-    }
+    }//是否是第一个
 
     public boolean isSingle() {
         return mIsOnlyOneItem;
-    }
+    }//是否是单个
 
     public long getId() {
         return mId;
-    }
+    }//获取id
 
     public long getAlertDate() {
         return mAlertDate;
-    }
+    }//获取提醒日期
 
     public long getCreatedDate() {
         return mCreatedDate;
-    }
+    }//获取创建日期
 
     public boolean hasAttachment() {
         return mHasAttachment;
-    }
+    }//是否有附件
 
     public long getModifiedDate() {
         return mModifiedDate;
-    }
+    }//获取修改日期
 
     public int getBgColorId() {
         return mBgColorId;
-    }
+    }//获取背景颜色id
 
     public long getParentId() {
         return mParentId;
-    }
+    }//获取父id
 
     public int getNotesCount() {
         return mNotesCount;
-    }
+    }//获取笔记数量
 
     public long getFolderId () {
         return mParentId;
-    }
+    }//获取文件夹id
 
     public int getType() {
         return mType;
-    }
+    }//获取类型
 
     public int getWidgetType() {
         return mWidgetType;
-    }
+    }//获取小部件类型
 
     public int getWidgetId() {
         return mWidgetId;
-    }
+    }//获取小部件id
 
     public String getSnippet() {
         return mSnippet;
-    }
+    }//获取片段
 
     public boolean hasAlert() {
         return (mAlertDate > 0);
-    }
+    }//是否有提醒
 
-    public boolean isCallRecord() {
+    public boolean isCallRecord() {//是否是呼叫记录
         return (mParentId == Notes.ID_CALL_RECORD_FOLDER && !TextUtils.isEmpty(mPhoneNumber));
     }
 
     public static int getNoteType(Cursor cursor) {
         return cursor.getInt(TYPE_COLUMN);
-    }
+    }//获取笔记类型
 }
diff --git a/src/main/java/net/micode/notes/ui/NotesListActivity.java b/src/main/java/net/micode/notes/ui/NotesListActivity.java
index e843aec..5fcfbfd 100644
--- a/src/main/java/net/micode/notes/ui/NotesListActivity.java
+++ b/src/main/java/net/micode/notes/ui/NotesListActivity.java
@@ -78,7 +78,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.HashSet;
 
-public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {  //用来显示所有的笔记
     private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
 
     private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
@@ -136,7 +136,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private final static int REQUEST_CODE_NEW_NODE  = 103;
 
     @Override
-    protected void onCreate(Bundle savedInstanceState) {
+    protected void onCreate(Bundle savedInstanceState) {//创建
         super.onCreate(savedInstanceState);
         setContentView(R.layout.note_list);
         initResources();
@@ -148,7 +148,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     @Override
-    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {//返回
         if (resultCode == RESULT_OK
                 && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
             mNotesListAdapter.changeCursor(null);
@@ -157,7 +157,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         }
     }
 
-    private void setAppInfoFromRawRes() {
+    private void setAppInfoFromRawRes() {//设置应用信息
         SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
         if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) {
             StringBuilder sb = new StringBuilder();
@@ -204,12 +204,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     @Override
-    protected void onStart() {
+    protected void onStart() {//开始
         super.onStart();
         startAsyncNotesListQuery();
     }
 
-    private void initResources() {
+    private void initResources() {//初始化资源
         mContentResolver = this.getContentResolver();
         mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
         mCurrentFolderId = Notes.ID_ROOT_FOLDER;
@@ -231,12 +231,12 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         mModeCallBack = new ModeCallback();
     }
 
-    private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
+    private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {//模式回调
         private DropdownMenu mDropDownMenu;
         private ActionMode mActionMode;
         private MenuItem mMoveMenu;
 
-        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+        public boolean onCreateActionMode(ActionMode mode, Menu menu) {//创建
             getMenuInflater().inflate(R.menu.note_list_options, menu);
             menu.findItem(R.id.delete).setOnMenuItemClickListener(this);
             mMoveMenu = menu.findItem(R.id.move);
@@ -269,7 +269,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             return true;
         }
 
-        private void updateMenu() {
+        private void updateMenu() {//更新菜单
             int selectedCount = mNotesListAdapter.getSelectedCount();
             // Update dropdown menu
             String format = getResources().getString(R.string.menu_select_title, selectedCount);
@@ -286,17 +286,17 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
         }
 
-        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {//准备
             // TODO Auto-generated method stub
             return false;
         }
 
-        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {//点击
             // TODO Auto-generated method stub
             return false;
         }
 
-        public void onDestroyActionMode(ActionMode mode) {
+        public void onDestroyActionMode(ActionMode mode) {//销毁
             mNotesListAdapter.setChoiceMode(false);
             mNotesListView.setLongClickable(true);
             mAddNewNote.setVisibility(View.VISIBLE);
@@ -304,7 +304,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
         public void finishActionMode() {
             mActionMode.finish();
-        }
+        }//结束
 
         public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
                 boolean checked) {