Merge pull request '背景更改功能完成' (#4) from yeah into master

src/main/java/net/micode/notes/ui/NotesListActivity.java

@@ -5,7 +5,7 @@
  * 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
+ *        <url id="d0s4geb67ti966oe1310" type="url" status="parsed" title="Apache License, Version 2.0" wc="10467">http://www.apache.org/licenses/LICENSE-2.0</url>
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -79,101 +79,98 @@ import java.io.InputStreamReader;
 import java.util.HashSet;
 
 public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
+    //定义背景
+    private int mode=-1;//add
+    // 定义查询标记
     private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
-
     private static final int FOLDER_LIST_QUERY_TOKEN      = 1;
-
+    // 定义菜单项 ID
     private static final int MENU_FOLDER_DELETE = 0;
-
     private static final int MENU_FOLDER_VIEW = 1;
-
     private static final int MENU_FOLDER_CHANGE_NAME = 2;
-
+    // 定义偏好设置键
     private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
-
+    // 定义列表编辑状态枚举
     private enum ListEditState {
         NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
     };
-
+    // 定义当前列表编辑状态
     private ListEditState mState;
-
+    // 定义异步查询处理器
     private BackgroundQueryHandler mBackgroundQueryHandler;
-
+    // 定义笔记列表适配器
     private NotesListAdapter mNotesListAdapter;
-
+    // 定义笔记列表视图
     private ListView mNotesListView;
-
+    // 定义新建笔记按钮
     private Button mAddNewNote;
-
+    // 定义是否正在分发触摸事件的标志
     private boolean mDispatch;
-
+    // 定义触摸事件的原始 Y 坐标和分发 Y 坐标
     private int mOriginY;
-
     private int mDispatchY;
-
+    // 定义标题栏视图
     private TextView mTitleBar;
-
+    // 定义当前文件夹 ID
     private long mCurrentFolderId;
-
+    // 定义内容解析器
     private ContentResolver mContentResolver;
-
+    // 定义多选模式回调
     private ModeCallback mModeCallBack;
-
+    // 定义日志标签
     private static final String TAG = "NotesListActivity";
-
+    // 定义列表视图滚动速率
     public static final int NOTES_LISTVIEW_SCROLL_RATE = 30;
-
+    // 定义焦点笔记数据项
     private NoteItemData mFocusNoteDataItem;
-
+    // 定义查询选择条件
     private static final String NORMAL_SELECTION = NoteColumns.PARENT_ID + "=?";
-
+    private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>" + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR (" + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND " + NoteColumns.NOTES_COUNT + ">0)";
-    private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>"
+    // 定义请求码
-            + Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR ("
-            + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND "
-            + NoteColumns.NOTES_COUNT + ">0)";
-
     private final static int REQUEST_CODE_OPEN_NODE = 102;
     private final static int REQUEST_CODE_NEW_NODE  = 103;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.note_list);
+        setContentView(R.layout.note_list); // 设置布局文件为 note_list
-        initResources();
+        initResources(); // 初始化资源
 
+        getWindow().setBackgroundDrawableResource(R.drawable.graygoo);
+        getWindow().setBackgroundDrawableResource(R.drawable.hutao);
+        getWindow().setBackgroundDrawableResource(R.drawable.miku);
         /**
-         * Insert an introduction when user firstly use this application
+         * 当用户首次使用此应用时插入介绍
          */
-        setAppInfoFromRawRes();
+        setAppInfoFromRawRes(); // 从原始资源文件中读取介绍信息并创建笔记
     }
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-        if (resultCode == RESULT_OK
+        if (resultCode == RESULT_OK && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
-                && (requestCode == REQUEST_CODE_OPEN_NODE || requestCode == REQUEST_CODE_NEW_NODE)) {
+            mNotesListAdapter.changeCursor(null); // 更改游标以刷新列表
-            mNotesListAdapter.changeCursor(null);
         } else {
-            super.onActivityResult(requestCode, resultCode, data);
+            super.onActivityResult(requestCode, resultCode, data); // 调用父类的方法
         }
     }
 
     private void setAppInfoFromRawRes() {
-        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
+        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this); // 获取默认偏好设置
-        if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) {
+        if (!sp.getBoolean(PREFERENCE_ADD_INTRODUCTION, false)) { // 如果未添加介绍
-            StringBuilder sb = new StringBuilder();
+            StringBuilder sb = new StringBuilder(); // 创建字符串构建器
             InputStream in = null;
             try {
-                 in = getResources().openRawResource(R.raw.introduction);
+                in = getResources().openRawResource(R.raw.introduction); // 打开原始资源文件
                 if (in != null) {
                     InputStreamReader isr = new InputStreamReader(in);
                     BufferedReader br = new BufferedReader(isr);
                     char[] buf = new char[1024];
                     int len = 0;
                     while ((len = br.read(buf)) > 0) {
-                        sb.append(buf, 0, len);
+                        sb.append(buf, 0, len); // 将读取的内容追加到字符串构建器
                     }
                 } else {
-                    Log.e(TAG, "Read introduction file error");
+                    Log.e(TAG, "读取介绍文件错误");
                     return;
                 }
             } catch (IOException e) {
@@ -182,22 +179,19 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             } finally {
                 if (in != null) {
                     try {
-                        in.close();
+                        in.close(); // 关闭输入流
                     } catch (IOException e) {
-                        // TODO Auto-generated catch block
                         e.printStackTrace();
                     }
                 }
             }
 
-            WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER,
+            WorkingNote note = WorkingNote.createEmptyNote(this, Notes.ID_ROOT_FOLDER, AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE, ResourceParser.RED); // 创建空笔记
-                    AppWidgetManager.INVALID_APPWIDGET_ID, Notes.TYPE_WIDGET_INVALIDE,
+            note.setWorkingText(sb.toString()); // 设置笔记内容
-                    ResourceParser.RED);
+            if (note.saveNote()) { // 保存笔记
-            note.setWorkingText(sb.toString());
+                sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit(); // 更新偏好设置
-            if (note.saveNote()) {
-                sp.edit().putBoolean(PREFERENCE_ADD_INTRODUCTION, true).commit();
             } else {
-                Log.e(TAG, "Save introduction note error");
+                Log.e(TAG, "保存介绍笔记错误");
                 return;
             }
         }
@@ -206,29 +200,28 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     @Override
     protected void onStart() {
         super.onStart();
-        startAsyncNotesListQuery();
+        startAsyncNotesListQuery(); // 开始异步查询笔记列表
     }
 
     private void initResources() {
-        mContentResolver = this.getContentResolver();
+        mContentResolver = this.getContentResolver(); // 获取内容解析器
-        mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver());
+        mBackgroundQueryHandler = new BackgroundQueryHandler(this.getContentResolver()); // 创建异步查询处理器
-        mCurrentFolderId = Notes.ID_ROOT_FOLDER;
+        mCurrentFolderId = Notes.ID_ROOT_FOLDER; // 设置当前文件夹 ID 为根文件夹
-        mNotesListView = (ListView) findViewById(R.id.notes_list);
+        mNotesListView = (ListView) findViewById(R.id.notes_list); // 获取笔记列表视图
-        mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null),
+        mNotesListView.addFooterView(LayoutInflater.from(this).inflate(R.layout.note_list_footer, null), null, false); // 添加页脚视图
-                null, false);
+        mNotesListView.setOnItemClickListener(new OnListItemClickListener()); // 设置项点击监听器
-        mNotesListView.setOnItemClickListener(new OnListItemClickListener());
+        mNotesListView.setOnItemLongClickListener(this); // 设置项长按监听器
-        mNotesListView.setOnItemLongClickListener(this);
+        mNotesListAdapter = new NotesListAdapter(this); // 创建笔记列表适配器
-        mNotesListAdapter = new NotesListAdapter(this);
+        mNotesListView.setAdapter(mNotesListAdapter); // 设置适配器
-        mNotesListView.setAdapter(mNotesListAdapter);
+        mAddNewNote = (Button) findViewById(R.id.btn_new_note); // 获取新建笔记按钮
-        mAddNewNote = (Button) findViewById(R.id.btn_new_note);
+        mAddNewNote.setOnClickListener(this); // 设置点击监听器
-        mAddNewNote.setOnClickListener(this);
+        mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener()); // 设置触摸监听器
-        mAddNewNote.setOnTouchListener(new NewNoteOnTouchListener());
         mDispatch = false;
         mDispatchY = 0;
         mOriginY = 0;
-        mTitleBar = (TextView) findViewById(R.id.tv_title_bar);
+        mTitleBar = (TextView) findViewById(R.id.tv_title_bar); // 获取标题栏视图
-        mState = ListEditState.NOTE_LIST;
+        mState = ListEditState.NOTE_LIST; // 设置列表编辑状态为笔记列表
-        mModeCallBack = new ModeCallback();
+        mModeCallBack = new ModeCallback(); // 创建多选模式回调
     }
 
     private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
@@ -237,85 +230,76 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         private MenuItem mMoveMenu;
 
         public boolean onCreateActionMode(ActionMode mode, Menu menu) {
-            getMenuInflater().inflate(R.menu.note_list_options, menu);
+            getMenuInflater().inflate(R.menu.note_list_options, menu); // 加载菜单资源
-            menu.findItem(R.id.delete).setOnMenuItemClickListener(this);
+            menu.findItem(R.id.delete).setOnMenuItemClickListener(this); // 设置菜单项点击监听器
             mMoveMenu = menu.findItem(R.id.move);
-            if (mFocusNoteDataItem.getParentId() == Notes.ID_CALL_RECORD_FOLDER
+            if (mFocusNoteDataItem.getParentId() == Notes.ID_CALL_RECORD_FOLDER || DataUtils.getUserFolderCount(mContentResolver) == 0) {
-                    || DataUtils.getUserFolderCount(mContentResolver) == 0) {
+                mMoveMenu.setVisible(false); // 如果是通话记录文件夹或没有用户文件夹，则隐藏移动菜单项
-                mMoveMenu.setVisible(false);
             } else {
                 mMoveMenu.setVisible(true);
-                mMoveMenu.setOnMenuItemClickListener(this);
+                mMoveMenu.setOnMenuItemClickListener(this); // 设置菜单项点击监听器
             }
             mActionMode = mode;
-            mNotesListAdapter.setChoiceMode(true);
+            mNotesListAdapter.setChoiceMode(true); // 设置适配器为选择模式
-            mNotesListView.setLongClickable(false);
+            mNotesListView.setLongClickable(false); // 禁用长按事件
-            mAddNewNote.setVisibility(View.GONE);
+            mAddNewNote.setVisibility(View.GONE); // 隐藏新建笔记按钮
-
+
-            View customView = LayoutInflater.from(NotesListActivity.this).inflate(
+            View customView = LayoutInflater.from(NotesListActivity.this).inflate(R.layout.note_list_dropdown_menu, null); // 加载自定义视图
-                    R.layout.note_list_dropdown_menu, null);
+            mode.setCustomView(customView); // 设置自定义视图
-            mode.setCustomView(customView);
+            mDropDownMenu = new DropdownMenu(NotesListActivity.this, (Button) customView.findViewById(R.id.selection_menu), R.menu.note_list_dropdown); // 创建下拉菜单
-            mDropDownMenu = new DropdownMenu(NotesListActivity.this,
-                    (Button) customView.findViewById(R.id.selection_menu),
-                    R.menu.note_list_dropdown);
             mDropDownMenu.setOnDropdownMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                 public boolean onMenuItemClick(MenuItem item) {
-                    mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected());
+                    mNotesListAdapter.selectAll(!mNotesListAdapter.isAllSelected()); // 选择或取消选择所有项
-                    updateMenu();
+                    updateMenu(); // 更新菜单
                     return true;
                 }
-
             });
             return true;
         }
 
         private void updateMenu() {
-            int selectedCount = mNotesListAdapter.getSelectedCount();
+            int selectedCount = mNotesListAdapter.getSelectedCount(); // 获取已选择的项数
-            // Update dropdown menu
+            // 更新下拉菜单
             String format = getResources().getString(R.string.menu_select_title, selectedCount);
             mDropDownMenu.setTitle(format);
             MenuItem item = mDropDownMenu.findItem(R.id.action_select_all);
             if (item != null) {
                 if (mNotesListAdapter.isAllSelected()) {
                     item.setChecked(true);
-                    item.setTitle(R.string.menu_deselect_all);
+                    item.setTitle(R.string.menu_deselect_all); // 设置为取消选择全部
                 } else {
                     item.setChecked(false);
-                    item.setTitle(R.string.menu_select_all);
+                    item.setTitle(R.string.menu_select_all); // 设置为选择全部
                 }
             }
         }
 
         public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
-            // TODO Auto-generated method stub
             return false;
         }
 
         public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
-            // TODO Auto-generated method stub
             return false;
         }
 
         public void onDestroyActionMode(ActionMode mode) {
-            mNotesListAdapter.setChoiceMode(false);
+            mNotesListAdapter.setChoiceMode(false); // 退出选择模式
-            mNotesListView.setLongClickable(true);
+            mNotesListView.setLongClickable(true); // 恢复长按事件
-            mAddNewNote.setVisibility(View.VISIBLE);
+            mAddNewNote.setVisibility(View.VISIBLE); // 显示新建笔记按钮
         }
 
         public void finishActionMode() {
-            mActionMode.finish();
+            mActionMode.finish(); // 结束多选模式
         }
 
-        public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
+        public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
-                boolean checked) {
+            mNotesListAdapter.setCheckedItem(position, checked); // 设置选中状态
-            mNotesListAdapter.setCheckedItem(position, checked);
+            updateMenu(); // 更新菜单
-            updateMenu();
         }
 
         public boolean onMenuItemClick(MenuItem item) {
             if (mNotesListAdapter.getSelectedCount() == 0) {
-                Toast.makeText(NotesListActivity.this, getString(R.string.menu_select_none),
+                Toast.makeText(NotesListActivity.this, getString(R.string.menu_select_none), Toast.LENGTH_SHORT).show(); // 显示未选择任何项的提示
-                        Toast.LENGTH_SHORT).show();
                 return true;
             }
 
@@ -324,20 +308,17 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
                     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,
+                    builder.setMessage(getString(R.string.alert_message_delete_notes, mNotesListAdapter.getSelectedCount())); // 设置删除确认对话框
-                                             mNotesListAdapter.getSelectedCount()));
+                    builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
-                    builder.setPositiveButton(android.R.string.ok,
+                        public void onClick(DialogInterface dialog, int which) {
-                                             new DialogInterface.OnClickListener() {
+                            batchDelete(); // 批量删除
-                                                 public void onClick(DialogInterface dialog,
-                                                         int which) {
-                                                     batchDelete();
                         }
                     });
                     builder.setNegativeButton(android.R.string.cancel, null);
                     builder.show();
                     break;
                 case R.id.move:
-                    startQueryDestinationFolders();
+                    startQueryDestinationFolders(); // 开始查询目标文件夹
                     break;
                 default:
                     return false;
@@ -347,36 +328,21 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     private class NewNoteOnTouchListener implements OnTouchListener {
-
         public boolean onTouch(View v, MotionEvent event) {
             switch (event.getAction()) {
-                case MotionEvent.ACTION_DOWN: {
+                case MotionEvent.ACTION_DOWN:
                     Display display = getWindowManager().getDefaultDisplay();
                     int screenHeight = display.getHeight();
                     int newNoteViewHeight = mAddNewNote.getHeight();
                     int start = screenHeight - newNoteViewHeight;
                     int eventY = start + (int) event.getY();
-                    /**
-                     * Minus TitleBar's height
-                     */
                     if (mState == ListEditState.SUB_FOLDER) {
                         eventY -= mTitleBar.getHeight();
                         start -= mTitleBar.getHeight();
                     }
-                    /**
-                     * 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）
-                     * 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
-                     * also change. This is very bad, just for the UI designer's strong requirement.
-                     */
                     if (event.getY() < (event.getX() * (-0.12) + 94)) {
-                        View view = mNotesListView.getChildAt(mNotesListView.getChildCount() - 1
+                        View view = mNotesListView.getChildAt(mNotesListView.getChildCount() - 1 - mNotesListView.getFooterViewsCount());
-                                - mNotesListView.getFooterViewsCount());
+                        if (view != null && view.getBottom() > start && (view.getTop() < (start + 94))) {
-                        if (view != null && view.getBottom() > start
-                                && (view.getTop() < (start + 94))) {
                             mOriginY = (int) event.getY();
                             mDispatchY = eventY;
                             event.setLocation(event.getX(), mDispatchY);
@@ -385,16 +351,14 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                         }
                     }
                     break;
-                }
+                case MotionEvent.ACTION_MOVE:
-                case MotionEvent.ACTION_MOVE: {
                     if (mDispatch) {
                         mDispatchY += (int) event.getY() - mOriginY;
                         event.setLocation(event.getX(), mDispatchY);
                         return mNotesListView.dispatchTouchEvent(event);
                     }
                     break;
-                }
+                default:
-                default: {
                     if (mDispatch) {
                         event.setLocation(event.getX(), mDispatchY);
                         mDispatch = false;
@@ -402,19 +366,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                     }
                     break;
             }
-            }
             return false;
         }
-
+    }
-    };
 
     private void startAsyncNotesListQuery() {
-        String selection = (mCurrentFolderId == Notes.ID_ROOT_FOLDER) ? ROOT_FOLDER_SELECTION
+        String selection = (mCurrentFolderId == Notes.ID_ROOT_FOLDER) ? ROOT_FOLDER_SELECTION : NORMAL_SELECTION;
-                : NORMAL_SELECTION;
+        mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null, Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] { String.valueOf(mCurrentFolderId) }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
-        mBackgroundQueryHandler.startQuery(FOLDER_NOTE_LIST_QUERY_TOKEN, null,
-                Notes.CONTENT_NOTE_URI, NoteItemData.PROJECTION, selection, new String[] {
-                    String.valueOf(mCurrentFolderId)
-                }, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
     }
 
     private final class BackgroundQueryHandler extends AsyncQueryHandler {
@@ -426,13 +384,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
             switch (token) {
                 case FOLDER_NOTE_LIST_QUERY_TOKEN:
-                    mNotesListAdapter.changeCursor(cursor);
+                    mNotesListAdapter.changeCursor(cursor); // 更改游标以更新列表
                     break;
                 case FOLDER_LIST_QUERY_TOKEN:
                     if (cursor != null && cursor.getCount() > 0) {
-                        showFolderListMenu(cursor);
+                        showFolderListMenu(cursor); // 显示文件夹列表菜单
                     } else {
-                        Log.e(TAG, "Query folder failed");
+                        Log.e(TAG, "查询文件夹失败");
                     }
                     break;
                 default:
@@ -446,17 +404,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         builder.setTitle(R.string.menu_title_select_folder);
         final FoldersListAdapter adapter = new FoldersListAdapter(this, cursor);
         builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
-
             public void onClick(DialogInterface dialog, int which) {
-                DataUtils.batchMoveToFolder(mContentResolver,
+                DataUtils.batchMoveToFolder(mContentResolver, mNotesListAdapter.getSelectedItemIds(), adapter.getItemId(which)); // 批量移动到文件夹
-                        mNotesListAdapter.getSelectedItemIds(), adapter.getItemId(which));
+                Toast.makeText(NotesListActivity.this, getString(R.string.format_move_notes_to_folder, mNotesListAdapter.getSelectedCount(), adapter.getFolderName(NotesListActivity.this, which)), Toast.LENGTH_SHORT).show(); // 显示移动成功的提示
-                Toast.makeText(
+                mModeCallBack.finishActionMode(); // 结束多选模式
-                        NotesListActivity.this,
-                        getString(R.string.format_move_notes_to_folder,
-                                mNotesListAdapter.getSelectedCount(),
-                                adapter.getFolderName(NotesListActivity.this, which)),
-                        Toast.LENGTH_SHORT).show();
-                mModeCallBack.finishActionMode();
             }
         });
         builder.show();
@@ -466,26 +417,21 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         Intent intent = new Intent(this, NoteEditActivity.class);
         intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
         intent.putExtra(Notes.INTENT_EXTRA_FOLDER_ID, mCurrentFolderId);
-        this.startActivityForResult(intent, REQUEST_CODE_NEW_NODE);
+        this.startActivityForResult(intent, REQUEST_CODE_NEW_NODE); // 启动新建笔记活动
     }
 
     private void batchDelete() {
         new AsyncTask<Void, Void, HashSet<AppWidgetAttribute>>() {
             protected HashSet<AppWidgetAttribute> doInBackground(Void... unused) {
-                HashSet<AppWidgetAttribute> widgets = mNotesListAdapter.getSelectedWidget();
+                HashSet<AppWidgetAttribute> widgets = mNotesListAdapter.getSelectedWidget(); // 获取选中的小部件属性
                 if (!isSyncMode()) {
-                    // if not synced, delete notes directly
+                    if (DataUtils.batchDeleteNotes(mContentResolver, mNotesListAdapter.getSelectedItemIds())) { // 批量删除笔记
-                    if (DataUtils.batchDeleteNotes(mContentResolver, mNotesListAdapter
-                            .getSelectedItemIds())) {
                     } else {
-                        Log.e(TAG, "Delete notes error, should not happens");
+                        Log.e(TAG, "删除笔记错误，不应该发生");
                     }
                 } else {
-                    // in sync mode, we'll move the deleted note into the trash
+                    if (!DataUtils.batchMoveToFolder(mContentResolver, mNotesListAdapter.getSelectedItemIds(), Notes.ID_TRASH_FOLER)) { // 批量移动到回收站文件夹
-                    // folder
+                        Log.e(TAG, "移动笔记到回收站文件夹错误，不应该发生");
-                    if (!DataUtils.batchMoveToFolder(mContentResolver, mNotesListAdapter
-                            .getSelectedItemIds(), Notes.ID_TRASH_FOLER)) {
-                        Log.e(TAG, "Move notes to trash folder error, should not happens");
                     }
                 }
                 return widgets;
@@ -495,39 +441,34 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             protected void onPostExecute(HashSet<AppWidgetAttribute> widgets) {
                 if (widgets != null) {
                     for (AppWidgetAttribute widget : widgets) {
-                        if (widget.widgetId != AppWidgetManager.INVALID_APPWIDGET_ID
+                        if (widget.widgetId != AppWidgetManager.INVALID_APPWIDGET_ID && widget.widgetType != Notes.TYPE_WIDGET_INVALIDE) {
-                                && widget.widgetType != Notes.TYPE_WIDGET_INVALIDE) {
+                            updateWidget(widget.widgetId, widget.widgetType); // 更新小部件
-                            updateWidget(widget.widgetId, widget.widgetType);
                         }
                     }
                 }
-                mModeCallBack.finishActionMode();
+                mModeCallBack.finishActionMode(); // 结束多选模式
             }
         }.execute();
     }
 
     private void deleteFolder(long folderId) {
         if (folderId == Notes.ID_ROOT_FOLDER) {
-            Log.e(TAG, "Wrong folder id, should not happen " + folderId);
+            Log.e(TAG, "错误的文件夹 ID，不应该发生 " + folderId);
             return;
         }
 
         HashSet<Long> ids = new HashSet<Long>();
         ids.add(folderId);
-        HashSet<AppWidgetAttribute> widgets = DataUtils.getFolderNoteWidget(mContentResolver,
+        HashSet<AppWidgetAttribute> widgets = DataUtils.getFolderNoteWidget(mContentResolver, folderId);
-                folderId);
         if (!isSyncMode()) {
-            // if not synced, delete folder directly
+            DataUtils.batchDeleteNotes(mContentResolver, ids); // 批量删除笔记
-            DataUtils.batchDeleteNotes(mContentResolver, ids);
         } else {
-            // in sync mode, we'll move the deleted folder into the trash folder
+            DataUtils.batchMoveToFolder(mContentResolver, ids, Notes.ID_TRASH_FOLER); // 批量移动到回收站文件夹
-            DataUtils.batchMoveToFolder(mContentResolver, ids, Notes.ID_TRASH_FOLER);
         }
         if (widgets != null) {
             for (AppWidgetAttribute widget : widgets) {
-                if (widget.widgetId != AppWidgetManager.INVALID_APPWIDGET_ID
+                if (widget.widgetId != AppWidgetManager.INVALID_APPWIDGET_ID && widget.widgetType != Notes.TYPE_WIDGET_INVALIDE) {
-                        && widget.widgetType != Notes.TYPE_WIDGET_INVALIDE) {
+                    updateWidget(widget.widgetId, widget.widgetType); // 更新小部件
-                    updateWidget(widget.widgetId, widget.widgetType);
                 }
             }
         }
@@ -537,30 +478,30 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         Intent intent = new Intent(this, NoteEditActivity.class);
         intent.setAction(Intent.ACTION_VIEW);
         intent.putExtra(Intent.EXTRA_UID, data.getId());
-        this.startActivityForResult(intent, REQUEST_CODE_OPEN_NODE);
+        this.startActivityForResult(intent, REQUEST_CODE_OPEN_NODE); // 启动查看笔记活动
     }
 
     private void openFolder(NoteItemData data) {
         mCurrentFolderId = data.getId();
-        startAsyncNotesListQuery();
+        startAsyncNotesListQuery(); // 开始异步查询笔记列表
         if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
             mState = ListEditState.CALL_RECORD_FOLDER;
-            mAddNewNote.setVisibility(View.GONE);
+            mAddNewNote.setVisibility(View.GONE); // 隐藏新建笔记按钮
         } else {
             mState = ListEditState.SUB_FOLDER;
         }
         if (data.getId() == Notes.ID_CALL_RECORD_FOLDER) {
-            mTitleBar.setText(R.string.call_record_folder_name);
+            mTitleBar.setText(R.string.call_record_folder_name); // 设置标题栏文本为通话记录文件夹名称
         } else {
-            mTitleBar.setText(data.getSnippet());
+            mTitleBar.setText(data.getSnippet()); // 设置标题栏文本为文件夹名称
         }
-        mTitleBar.setVisibility(View.VISIBLE);
+        mTitleBar.setVisibility(View.VISIBLE); // 显示标题栏
     }
 
     public void onClick(View v) {
         switch (v.getId()) {
             case R.id.btn_new_note:
-                createNewNote();
+                createNewNote(); // 创建新笔记
                 break;
             default:
                 break;
@@ -570,13 +511,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private void showSoftInput() {
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
         if (inputMethodManager != null) {
-            inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
+            inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0); // 显示软键盘
         }
     }
 
     private void hideSoftInput(View view) {
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
-        inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
+        inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0); // 隐藏软键盘
     }
 
     private void showCreateOrModifyFolderDialog(final boolean create) {
@@ -586,15 +527,15 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         showSoftInput();
         if (!create) {
             if (mFocusNoteDataItem != null) {
-                etName.setText(mFocusNoteDataItem.getSnippet());
+                etName.setText(mFocusNoteDataItem.getSnippet()); // 设置文件夹名称
-                builder.setTitle(getString(R.string.menu_folder_change_name));
+                builder.setTitle(getString(R.string.menu_folder_change_name)); // 设置对话框标题为更改文件夹名称
             } else {
-                Log.e(TAG, "The long click data item is null");
+                Log.e(TAG, "长按的数据项为空");
                 return;
             }
         } else {
             etName.setText("");
-            builder.setTitle(this.getString(R.string.menu_create_folder));
+            builder.setTitle(this.getString(R.string.menu_create_folder)); // 设置对话框标题为创建文件夹
         }
 
         builder.setPositiveButton(android.R.string.ok, null);
@@ -611,8 +552,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 hideSoftInput(etName);
                 String name = etName.getText().toString();
                 if (DataUtils.checkVisibleFolderName(mContentResolver, name)) {
-                    Toast.makeText(NotesListActivity.this, getString(R.string.folder_exist, name),
+                    Toast.makeText(NotesListActivity.this, getString(R.string.folder_exist, name), Toast.LENGTH_LONG).show(); // 显示文件夹已存在的提示
-                            Toast.LENGTH_LONG).show();
                     etName.setSelection(0, etName.length());
                     return;
                 }
@@ -622,16 +562,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                         values.put(NoteColumns.SNIPPET, name);
                         values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
                         values.put(NoteColumns.LOCAL_MODIFIED, 1);
-                        mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID
+                        mContentResolver.update(Notes.CONTENT_NOTE_URI, values, NoteColumns.ID + "=?", new String[] { String.valueOf(mFocusNoteDataItem.getId()) }); // 更新文件夹名称
-                                + "=?", new String[] {
-                            String.valueOf(mFocusNoteDataItem.getId())
-                        });
                     }
                 } else if (!TextUtils.isEmpty(name)) {
                     ContentValues values = new ContentValues();
                     values.put(NoteColumns.SNIPPET, name);
                     values.put(NoteColumns.TYPE, Notes.TYPE_FOLDER);
-                    mContentResolver.insert(Notes.CONTENT_NOTE_URI, values);
+                    mContentResolver.insert(Notes.CONTENT_NOTE_URI, values); // 插入新文件夹
                 }
                 dialog.dismiss();
             }
@@ -640,13 +577,8 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         if (TextUtils.isEmpty(etName.getText())) {
             positive.setEnabled(false);
         }
-        /**
-         * When the name edit text is null, disable the positive button
-         */
         etName.addTextChangedListener(new TextWatcher() {
             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-                // TODO Auto-generated method stub
-
             }
 
             public void onTextChanged(CharSequence s, int start, int before, int count) {
@@ -658,8 +590,6 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             }
 
             public void afterTextChanged(Editable s) {
-                // TODO Auto-generated method stub
-
             }
         });
     }
@@ -670,18 +600,18 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             case SUB_FOLDER:
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
                 mState = ListEditState.NOTE_LIST;
-                startAsyncNotesListQuery();
+                startAsyncNotesListQuery(); // 返回根文件夹
-                mTitleBar.setVisibility(View.GONE);
+                mTitleBar.setVisibility(View.GONE); // 隐藏标题栏
                 break;
             case CALL_RECORD_FOLDER:
                 mCurrentFolderId = Notes.ID_ROOT_FOLDER;
                 mState = ListEditState.NOTE_LIST;
-                mAddNewNote.setVisibility(View.VISIBLE);
+                mAddNewNote.setVisibility(View.VISIBLE); // 显示新建笔记按钮
-                mTitleBar.setVisibility(View.GONE);
+                mTitleBar.setVisibility(View.GONE); // 隐藏标题栏
-                startAsyncNotesListQuery();
+                startAsyncNotesListQuery(); // 返回根文件夹
                 break;
             case NOTE_LIST:
-                super.onBackPressed();
+                super.onBackPressed(); // 调用父类的返回键处理方法
                 break;
             default:
                 break;
@@ -695,13 +625,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         } else if (appWidgetType == Notes.TYPE_WIDGET_4X) {
             intent.setClass(this, NoteWidgetProvider_4x.class);
         } else {
-            Log.e(TAG, "Unspported widget type");
+            Log.e(TAG, "不支持的小部件类型");
             return;
         }
 
-        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] {
+        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, new int[] { appWidgetId });
-            appWidgetId
-        });
 
         sendBroadcast(intent);
         setResult(RESULT_OK, intent);
@@ -710,10 +638,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() {
         public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
             if (mFocusNoteDataItem != null) {
-                menu.setHeaderTitle(mFocusNoteDataItem.getSnippet());
+                menu.setHeaderTitle(mFocusNoteDataItem.getSnippet()); // 设置上下文菜单标题为文件夹名称
-                menu.add(0, MENU_FOLDER_VIEW, 0, R.string.menu_folder_view);
+                menu.add(0, MENU_FOLDER_VIEW, 0, R.string.menu_folder_view); // 添加查看文件夹菜单项
-                menu.add(0, MENU_FOLDER_DELETE, 0, R.string.menu_folder_delete);
+                menu.add(0, MENU_FOLDER_DELETE, 0, R.string.menu_folder_delete); // 添加删除文件夹菜单项
-                menu.add(0, MENU_FOLDER_CHANGE_NAME, 0, R.string.menu_folder_change_name);
+                menu.add(0, MENU_FOLDER_CHANGE_NAME, 0, R.string.menu_folder_change_name); // 添加更改文件夹名称菜单项
             }
         }
     };
@@ -721,7 +649,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     @Override
     public void onContextMenuClosed(Menu menu) {
         if (mNotesListView != null) {
-            mNotesListView.setOnCreateContextMenuListener(null);
+            mNotesListView.setOnCreateContextMenuListener(null); // 移除上下文菜单创建监听器
         }
         super.onContextMenuClosed(menu);
     }
@@ -729,29 +657,28 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     @Override
     public boolean onContextItemSelected(MenuItem item) {
         if (mFocusNoteDataItem == null) {
-            Log.e(TAG, "The long click data item is null");
+            Log.e(TAG, "长按的数据项为空");
             return false;
         }
         switch (item.getItemId()) {
             case MENU_FOLDER_VIEW:
-                openFolder(mFocusNoteDataItem);
+                openFolder(mFocusNoteDataItem); // 打开文件夹
                 break;
             case MENU_FOLDER_DELETE:
                 AlertDialog.Builder builder = new AlertDialog.Builder(this);
                 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));
+                builder.setMessage(getString(R.string.alert_message_delete_folder)); // 设置删除文件夹确认对话框
-                builder.setPositiveButton(android.R.string.ok,
+                builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
-                        new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int which) {
-                                deleteFolder(mFocusNoteDataItem.getId());
+                        deleteFolder(mFocusNoteDataItem.getId()); // 删除文件夹
                     }
                 });
                 builder.setNegativeButton(android.R.string.cancel, null);
                 builder.show();
                 break;
             case MENU_FOLDER_CHANGE_NAME:
-                showCreateOrModifyFolderDialog(false);
+                showCreateOrModifyFolderDialog(false); // 显示创建或修改文件夹对话框
                 break;
             default:
                 break;
@@ -765,50 +692,64 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
         menu.clear();
         if (mState == ListEditState.NOTE_LIST) {
             getMenuInflater().inflate(R.menu.note_list, menu);
-            // set sync or sync_cancel
+            menu.findItem(R.id.menu_sync).setTitle(GTaskSyncService.isSyncing() ? R.string.menu_sync_cancel : R.string.menu_sync); // 设置同步菜单项标题
-            menu.findItem(R.id.menu_sync).setTitle(
-                    GTaskSyncService.isSyncing() ? R.string.menu_sync_cancel : R.string.menu_sync);
         } else if (mState == ListEditState.SUB_FOLDER) {
             getMenuInflater().inflate(R.menu.sub_folder, menu);
         } else if (mState == ListEditState.CALL_RECORD_FOLDER) {
             getMenuInflater().inflate(R.menu.call_record_folder, menu);
         } else {
-            Log.e(TAG, "Wrong state:" + mState);
+            Log.e(TAG, "错误的状态：" + mState);
         }
+
+        if(mode==-1)menu.findItem(R.id.menu_graygoo).setVisible(false);
+        else if(mode==0)menu.findItem(R.id.menu_miku).setVisible(false);
+        else if(mode==1)menu.findItem(R.id.menu_hutao).setVisible(false);
         return true;
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
+
         switch (item.getItemId()) {
-            case R.id.menu_new_folder: {
+            case R.id.menu_graygoo:{
-                showCreateOrModifyFolderDialog(true);
+                mode=-1;
+                getWindow().setBackgroundDrawableResource(R.drawable.graygoo);
+                break;
+            }
+            case R.id.menu_miku:{
+                mode=0;
+                getWindow().setBackgroundDrawableResource(R.drawable.miku);
                 break;
             }
-            case R.id.menu_export_text: {
+            case R.id.menu_hutao:{
-                exportNoteToText();
+                mode=1;
+                getWindow().setBackgroundDrawableResource(R.drawable.hutao);
                 break;
             }
-            case R.id.menu_sync: {
+
+            case R.id.menu_new_folder:
+                showCreateOrModifyFolderDialog(true); // 显示创建文件夹对话框
+                break;
+            case R.id.menu_export_text:
+                exportNoteToText(); // 导出笔记为文本文件
+                break;
+            case R.id.menu_sync:
                 if (isSyncMode()) {
                     if (TextUtils.equals(item.getTitle(), getString(R.string.menu_sync))) {
-                        GTaskSyncService.startSync(this);
+                        GTaskSyncService.startSync(this); // 开始同步
                     } else {
-                        GTaskSyncService.cancelSync(this);
+                        GTaskSyncService.cancelSync(this); // 取消同步
                     }
                 } else {
-                    startPreferenceActivity();
+                    startPreferenceActivity(); // 启动偏好设置活动
                 }
                 break;
-            }
+            case R.id.menu_setting:
-            case R.id.menu_setting: {
+                startPreferenceActivity(); // 启动偏好设置活动
-                startPreferenceActivity();
                 break;
-            }
+            case R.id.menu_new_note:
-            case R.id.menu_new_note: {
+                createNewNote(); // 创建新笔记
-                createNewNote();
                 break;
-            }
             case R.id.menu_search:
                 onSearchRequested();
                 break;
@@ -820,7 +761,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     @Override
     public boolean onSearchRequested() {
-        startSearch(null, false, null /* appData */, false);
+        startSearch(null, false, null, false);
         return true;
     }
 
@@ -830,34 +771,27 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
             @Override
             protected Integer doInBackground(Void... unused) {
-                return backup.exportToText();
+                return backup.exportToText(); // 导出笔记为文本文件
             }
 
             @Override
             protected void onPostExecute(Integer result) {
                 if (result == BackupUtils.STATE_SD_CARD_UNMOUONTED) {
                     AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
-                    builder.setTitle(NotesListActivity.this
+                    builder.setTitle(NotesListActivity.this.getString(R.string.failed_sdcard_export));
-                            .getString(R.string.failed_sdcard_export));
+                    builder.setMessage(NotesListActivity.this.getString(R.string.error_sdcard_unmounted));
-                    builder.setMessage(NotesListActivity.this
-                            .getString(R.string.error_sdcard_unmounted));
                     builder.setPositiveButton(android.R.string.ok, null);
                     builder.show();
                 } else if (result == BackupUtils.STATE_SUCCESS) {
                     AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
-                    builder.setTitle(NotesListActivity.this
+                    builder.setTitle(NotesListActivity.this.getString(R.string.success_sdcard_export));
-                            .getString(R.string.success_sdcard_export));
+                    builder.setMessage(NotesListActivity.this.getString(R.string.format_exported_file_location, backup.getExportedTextFileName(), backup.getExportedTextFileDir()));
-                    builder.setMessage(NotesListActivity.this.getString(
-                            R.string.format_exported_file_location, backup
-                                    .getExportedTextFileName(), backup.getExportedTextFileDir()));
                     builder.setPositiveButton(android.R.string.ok, null);
                     builder.show();
                 } else if (result == BackupUtils.STATE_SYSTEM_ERROR) {
                     AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
-                    builder.setTitle(NotesListActivity.this
+                    builder.setTitle(NotesListActivity.this.getString(R.string.failed_sdcard_export));
-                            .getString(R.string.failed_sdcard_export));
+                    builder.setMessage(NotesListActivity.this.getString(R.string.error_sdcard_export));
-                    builder.setMessage(NotesListActivity.this
-                            .getString(R.string.error_sdcard_export));
                     builder.setPositiveButton(android.R.string.ok, null);
                     builder.show();
                 }
@@ -867,13 +801,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
     }
 
     private boolean isSyncMode() {
-        return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0;
+        return NotesPreferenceActivity.getSyncAccountName(this).trim().length() > 0; // 判断是否为同步模式
     }
 
     private void startPreferenceActivity() {
         Activity from = getParent() != null ? getParent() : this;
         Intent intent = new Intent(from, NotesPreferenceActivity.class);
-        from.startActivityIfNeeded(intent, -1);
+        from.startActivityIfNeeded(intent, -1); // 启动偏好设置活动
     }
 
     private class OnListItemClickListener implements OnItemClickListener {
@@ -884,29 +818,27 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
                 if (mNotesListAdapter.isInChoiceMode()) {
                     if (item.getType() == Notes.TYPE_NOTE) {
                         position = position - mNotesListView.getHeaderViewsCount();
-                        mModeCallBack.onItemCheckedStateChanged(null, position, id,
+                        mModeCallBack.onItemCheckedStateChanged(null, position, id, !mNotesListAdapter.isSelectedItem(position)); // 切换选中状态
-                                !mNotesListAdapter.isSelectedItem(position));
                     }
                     return;
                 }
 
                 switch (mState) {
                     case NOTE_LIST:
-                        if (item.getType() == Notes.TYPE_FOLDER
+                        if (item.getType() == Notes.TYPE_FOLDER || item.getType() == Notes.TYPE_SYSTEM) {
-                                || item.getType() == Notes.TYPE_SYSTEM) {
+                            openFolder(item); // 打开文件夹
-                            openFolder(item);
                         } else if (item.getType() == Notes.TYPE_NOTE) {
-                            openNode(item);
+                            openNode(item); // 打开笔记
                         } else {
-                            Log.e(TAG, "Wrong note type in NOTE_LIST");
+                            Log.e(TAG, "笔记列表中的错误笔记类型");
                         }
                         break;
                     case SUB_FOLDER:
                     case CALL_RECORD_FOLDER:
                         if (item.getType() == Notes.TYPE_NOTE) {
-                            openNode(item);
+                            openNode(item); // 打开笔记
                         } else {
-                            Log.e(TAG, "Wrong note type in SUB_FOLDER");
+                            Log.e(TAG, "子文件夹中的错误笔记类型");
                         }
                         break;
                     default:
@@ -919,20 +851,8 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
 
     private void startQueryDestinationFolders() {
         String selection = NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>? AND " + NoteColumns.ID + "<>?";
-        selection = (mState == ListEditState.NOTE_LIST) ? selection:
+        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, Notes.CONTENT_NOTE_URI, FoldersListAdapter.PROJECTION, selection, new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER), String.valueOf(mCurrentFolderId) }, NoteColumns.MODIFIED_DATE + " DESC");
-
-        mBackgroundQueryHandler.startQuery(FOLDER_LIST_QUERY_TOKEN,
-                null,
-                Notes.CONTENT_NOTE_URI,
-                FoldersListAdapter.PROJECTION,
-                selection,
-                new String[] {
-                        String.valueOf(Notes.TYPE_FOLDER),
-                        String.valueOf(Notes.ID_TRASH_FOLER),
-                        String.valueOf(mCurrentFolderId)
-                },
-                NoteColumns.MODIFIED_DATE + " DESC");
     }
 
     public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
@@ -940,13 +860,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
             mFocusNoteDataItem = ((NotesListItem) view).getItemData();
             if (mFocusNoteDataItem.getType() == Notes.TYPE_NOTE && !mNotesListAdapter.isInChoiceMode()) {
                 if (mNotesListView.startActionMode(mModeCallBack) != null) {
-                    mModeCallBack.onItemCheckedStateChanged(null, position, id, true);
+                    mModeCallBack.onItemCheckedStateChanged(null, position, id, true); // 进入多选模式并选中当前项
-                    mNotesListView.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
+                    mNotesListView.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); // 执行触觉反馈
                 } else {
-                    Log.e(TAG, "startActionMode fails");
+                    Log.e(TAG, "进入多选模式失败");
                 }
             } else if (mFocusNoteDataItem.getType() == Notes.TYPE_FOLDER) {
-                mNotesListView.setOnCreateContextMenuListener(mFolderOnCreateContextMenuListener);
+                mNotesListView.setOnCreateContextMenuListener(mFolderOnCreateContextMenuListener); // 设置上下文菜单创建监听器
             }
         }
         return false;

src/main/res/layout/note_list.xml

@@ -18,8 +18,8 @@
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
-    android:layout_height="fill_parent"
+    android:layout_height="fill_parent">
-    android:background="@drawable/list_background">
+<!--    android:background="@drawable/list_background">-->
 
     <LinearLayout
         android:layout_width="fill_parent"

src/main/res/menu/note_list.xml

@@ -36,4 +36,16 @@
     <item
         android:id="@+id/menu_search"
         android:title="@string/menu_search"/>
+
+    <item
+            android:id="@+id/menu_graygoo"
+            android:title="@string/menu_graygoo"/>
+
+    <item
+            android:id="@+id/menu_miku"
+            android:title="@string/menu_miku"/>
+
+    <item
+            android:id="@+id/menu_hutao"
+            android:title="@string/menu_hutao"/>
 </menu>

src/main/res/values/strings.xml

@@ -39,6 +39,10 @@
     <string name="file_path">/MIUI/notes/</string>
     <string name="file_name_txt_format">notes_%s.txt</string>
     <!-- notes list string -->
+    <string name="menu_graygoo">Background: graygoo</string>
+    <string name="menu_miku">Background: miku</string>
+    <string name="menu_hutao">Background: hutao</string>
+
     <string name="format_folder_files_count">(%d)</string>
     <string name="menu_create_folder">New Folder</string>
     <string name="menu_export_text">Export text</string>