// 屏幕设置
 public ScreenSettingInfo getScreenSettingInfo() {
   final DataProvider dataProvider = mDataProvider;
   Cursor cursor = dataProvider.queryScreenSetting();
   if (null != cursor) {
     try {
       ScreenSettingInfo info = new ScreenSettingInfo();
       boolean bOk = info.parseFromCursor(cursor);
       if (bOk) {
         return info;
       }
     } catch (SQLiteException e) {
       e.printStackTrace();
     } finally {
       cursor.close();
     }
   }
   return null;
 }