应用程序在几声蜂鸣声后意外停止

Question

我为一个应用程序写了一段代码，当手机倾斜到某个角度时，它会发出嘟嘟声。它一开始工作很好，但当我第7次或第8次倾斜手机时，它不再发出嘟嘟声。当我检查应用程序状态时，它显示为正在运行。我的服务代码是

public class TheService extends Service implements SensorEventListener {
    public static final String TAG = TheService.class.getName();
    public static final int SCREEN_OFF_RECEIVER_DELAY = 500;
    private SensorManager mSensorManager = null;
    private WakeLock mWakeLock = null;
    private float lastY;
    MediaPlayer mp1;
    private MediaPlayer mMediaPlayer;

    /*
     * Register this as a sensor event listener.
     */
    private void registerListener() {
        mSensorManager.registerListener(this,
                mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
                SensorManager.SENSOR_DELAY_NORMAL);
    }
    /*
     * Un-register this as a sensor event listener.
     */
    private void unregisterListener() {
        mSensorManager.unregisterListener(this);
    }
    public BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Log.i(TAG, "onReceive("+intent+")");
            if (!intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
                return;
            }
            Runnable runnable = new Runnable() {
                public void run() {
                    Log.i(TAG, "Runnable executing.");
                    unregisterListener();
                    registerListener();
                }
            };
            new Handler().postDelayed(runnable, SCREEN_OFF_RECEIVER_DELAY);
        }
    };
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

        Log.i(TAG, "onAccuracyChanged().");

    }
    public void onSensorChanged(SensorEvent event) {
        Log.i(TAG, "onSensorChanged().");
        lastY = event.values[2];
        if (lastY  <9  && lastY > 8) {   
        mMediaPlayer = MediaPlayer.create(this, R.raw.help);

        mMediaPlayer.start(); 

        }    

        }

    @Override
    public void onCreate() {
        super.onCreate();
        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        PowerManager manager =
            (PowerManager) getSystemService(Context.POWER_SERVICE);
        mWakeLock = manager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
        registerReceiver(mReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF));
    }
    @Override
    public void onDestroy() {
    mMediaPlayer.release();
        unregisterReceiver(mReceiver);
        unregisterListener();
        mWakeLock.release();
        stopForeground(true);

    }
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        startForeground(Process.myPid(), new Notification());
        registerListener();
        mWakeLock.acquire();
        return START_STICKY;
    }
}

我的主要活动代码是

public class MainActivity extends Activity {
    public static final String TAG = HelpIMFalling.class.getName();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    @Override
    public void onResume() {
        super.onResume();
        startService(new Intent(this, TheService.class));
    }
        }

我不确定安卓是否正在杀死它，或者我的代码中有任何问题。如果安卓系统一直这么做，该应用程序就不会显示为在后台运行。请帮忙。

Answer 1

您有日志吗？

避免重新创建MediaPlayer:

if(mMediaPlayer == null)
  mMediaPlayer = MediaPlayer.create(this, R.raw.help);