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@ -94,7 +94,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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private enum ListEditState {
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NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
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};
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}
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private ListEditState mState;
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@ -247,6 +247,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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private Menu menu;
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private MenuItem mMoveMenu;
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public boolean onCreateActionMode(ActionMode mode, Menu menu) {
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getMenuInflater().inflate(R.menu.note_list_options, menu);
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this.menu = menu;
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@ -265,6 +266,8 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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mAddNewNote.setVisibility(View.GONE);
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mMenuSet.setVisibility(View.GONE);
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//取一个自定义的视图，设置给ActionMode，
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// 并创建一个DropdownMenu（自定义的下拉菜单）对象，并设置下拉菜单项的点击监听器。
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View customView = LayoutInflater.from(NotesListActivity.this).inflate(
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R.layout.note_list_dropdown_menu, null);
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mode.setCustomView(customView);
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@ -282,6 +285,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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return true;
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}
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/**
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*更新下拉菜单的标题和选择项状态
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*/
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private void updateMenu() {
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int selectedCount = mNotesListAdapter.getSelectedCount();
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// Update dropdown menu
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@ -309,6 +315,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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return false;
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}
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//取消选择模式，清除选择项，恢复一些视图的可见性，并通知适配器数据集变化
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public void onDestroyActionMode(ActionMode mode) {
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mNotesListAdapter.setChoiceMode(false);
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mNotesListView.clearChoices();
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@ -349,6 +356,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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public boolean onMenuItemClick(MenuItem item) {
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//判断是否有选中的项，如果没有则弹出一个Toast提示用户选择项为空
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if (mNotesListAdapter.getSelectedCount() == 0) {
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Toast.makeText(NotesListActivity.this, getString(R.string.menu_select_none),
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Toast.LENGTH_SHORT).show();
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@ -357,11 +365,13 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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switch (item.getItemId()) {
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case R.id.delete:
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//创建一个对话框，并设置标题、图标和正文信息
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AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
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builder.setTitle(getString(R.string.alert_title_delete));
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builder.setIcon(android.R.drawable.ic_dialog_alert);
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builder.setMessage(getString(R.string.alert_message_delete_notes,
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mNotesListAdapter.getSelectedCount()));
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//确认按钮被点击时，调用batchDelete()方法批量删除选中的项；取消按钮则关闭对话框。
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builder.setPositiveButton(android.R.string.ok,
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new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface dialog,
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@ -372,6 +382,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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builder.setNegativeButton(android.R.string.cancel, null);
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builder.show();
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break;
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//如果是移动菜单项，则调用startQueryDestinationFolders()方法，
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// 该方法会开启异步线程，并查询所有的目标文件夹，
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// 查询结果会在回调函数onQueryComplete()中得到处理和展示
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case R.id.move:
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startQueryDestinationFolders();
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break;
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@ -383,10 +396,18 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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/**
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*写便签的监听
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*/
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private class NewNoteOnTouchListener implements OnTouchListener {
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public boolean onTouch(View v, MotionEvent event) {
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switch (event.getAction()) {
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//当用户按下手指时触发。
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// 根据屏幕和"New Note"视图的高度计算出开始位置和事件Y坐标。
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// 如果当前状态是ListEditState.SUB_FOLDER（列表编辑状态为子文件夹），
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// 则减去标题栏的高度。然后检查是否点击了"New Note"按钮的透明部分，
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// 如果是，则将事件分派给按钮后面的列表视图。
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case MotionEvent.ACTION_DOWN: {
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Display display = getWindowManager().getDefaultDisplay();
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int screenHeight = display.getHeight();
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@ -423,6 +444,8 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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break;
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}
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//当用户滑动手指时触发。如果之前已经分派了事件（即mDispatch为true），
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// 则更新分派Y坐标并将事件重新定位，然后将其分派给列表视图。
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case MotionEvent.ACTION_MOVE: {
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if (mDispatch) {
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mDispatchY += (int) event.getY() - mOriginY;
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@ -431,6 +454,8 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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break;
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}
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//当用户释放手指时触发。
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// 如果之前已经分派了事件（即mDispatch为true），则将事件重新定位并取消分派。
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default: {
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if (mDispatch) {
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event.setLocation(event.getX(), mDispatchY);
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@ -443,8 +468,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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return false;
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}
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};
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}
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/**
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* 启动异步查询便签列表的操作
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*/
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private void startAsyncNotesListQuery() {
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String selection = (mCurrentFolderId == Notes.ID_ROOT_FOLDER) ? ROOT_FOLDER_SELECTION
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: NORMAL_SELECTION;
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@ -454,6 +482,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}, NoteColumns.TYPE + " DESC," + NoteColumns.MODIFIED_DATE + " DESC");
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}
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/**
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* 执行后台查询操作
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*/
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@SuppressLint("HandlerLeak")
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private final class BackgroundQueryHandler extends AsyncQueryHandler {
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public BackgroundQueryHandler(ContentResolver contentResolver) {
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super(contentResolver);
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@ -478,6 +510,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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}
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/**
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* 显示文件夹列表的菜单，供用户选择将便签移动到哪个文件夹中。
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* @param cursor
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*/
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private void showFolderListMenu(Cursor cursor) {
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AlertDialog.Builder builder = new AlertDialog.Builder(NotesListActivity.this);
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builder.setTitle(R.string.menu_title_select_folder);
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@ -506,6 +542,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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this.startActivityForResult(intent, REQUEST_CODE_NEW_NODE);
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}
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/**
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* 批量删除便签
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*/
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@SuppressLint("StaticFieldLeak")
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private void batchDelete() {
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new AsyncTask<Void, Void, HashSet<AppWidgetAttribute>>() {
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@ -606,6 +645,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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}
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/**
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* 显示软键盘
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*/
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private void showSoftInput() {
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InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
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if (inputMethodManager != null) {
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@ -618,6 +660,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
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}
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/**
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* 显示创建或编辑文件夹对话框
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* @param create
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*/
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private void showCreateOrModifyFolderDialog(final boolean create) {
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final AlertDialog.Builder builder = new AlertDialog.Builder(this);
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View view = LayoutInflater.from(this).inflate(R.layout.dialog_edit_text, null);
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@ -731,6 +778,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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}
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/**
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* 更新指定标识的小部件
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* @param appWidgetId
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* @param appWidgetType
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*/
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private void updateWidget(int appWidgetId, int appWidgetType) {
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Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
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if (appWidgetType == Notes.TYPE_WIDGET_2X) {
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@ -750,6 +802,7 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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setResult(RESULT_OK, intent);
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}
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private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() {
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public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
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if (mFocusNoteDataItem != null) {
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@ -803,6 +856,11 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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return true;
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}
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/**
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* 根据当前状态 mState 的不同，在菜单准备显示时根据状态填充不同的菜单项，并根据条件设置指定菜单项的标题。
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* @param menu
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* @return
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*/
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@Override
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public boolean onPrepareOptionsMenu(Menu menu) {
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menu.clear();
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@ -867,6 +925,10 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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return true;
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}
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/**
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* 导出笔记到文本文件
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*/
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@SuppressLint("StaticFieldLeak")
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private void exportNoteToText() {
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final BackupUtils backup = BackupUtils.getInstance(NotesListActivity.this);
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new AsyncTask<Void, Void, Integer>() {
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@ -960,6 +1022,9 @@ public class NotesListActivity extends Activity implements OnClickListener, OnIt
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}
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/**
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* 查询目标文件夹列表
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*/
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private void startQueryDestinationFolders() {
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String selection = NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>? AND " + NoteColumns.ID + "<>?";
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selection = (mState == ListEditState.NOTE_LIST) ? selection:
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