Android调用手机系统默认铃声

　　　　　　　//调用系统默认的铃声
        private void playTheBell(){
            MediaPlayer mp = new MediaPlayer();
                try {
                     mp.setDataSource(this, RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM));
                     mp.prepare();
                } catch (IllegalArgumentException e) {
                     e.printStackTrace();
                } catch (SecurityException e) {
                     e.printStackTrace();
                } catch (IllegalStateException e) {
                     e.printStackTrace();
                } catch (IOException e) {
                     e.printStackTrace();
                }
                     mp.start();
         }