我正在嘗試創建一個應用程序,該應用程序使用服務在一定的時間內跟蹤設備的方向。當方向改變時,設備發出聲音。只要設備處於打開狀態,此功能就可以正常工作。只要我鎖定設備或屏幕關閉,我聽不到聲音(我想要)。如何在屏幕關閉時獲取傳感器數據?
我的服務代碼是
public class RakatTrackingService extends Service implements SensorEventListener {
private SharedPreferences sharedPref;
private long[] sessionComposition = new long[4];
private String position="none", lastPosition ="none";
private SensorManager sensorManager;
private Sensor accelerometer;
private PowerManager.WakeLock wakeLock;
public RakatTrackingService()
{
}
public RakatTrackingService(long[] sessionComposition) {
this.sessionComposition = sessionComposition;
}
@Override
public void onCreate() {
super.onCreate();
SharedPreferences sharedPref = getSharedPreferences("rakatData",Context.MODE_PRIVATE);
sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
if (sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) != null)
{
accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
sensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_NORMAL);
Toast.makeText(this, "sensor registered", Toast.LENGTH_LONG).show();
}
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onSensorChanged(SensorEvent event) {
lastPosition = position;
if(Math.abs(event.values[0]) > Math.abs(event.values[1]) && Math.abs(event.values[0]) > Math.abs(event.values[2]))
{
position="horizontal-side";
}
if(Math.abs(event.values[1]) > Math.abs(event.values[0]) && Math.abs(event.values[1]) > Math.abs(event.values[2]))
{
position="vertical";
}
if(Math.abs(event.values[2]) > Math.abs(event.values[0]) && Math.abs(event.values[2]) > Math.abs(event.values[1]))
{
position="horizontal";
}
System.out.println(position);
if(!lastPosition.equalsIgnoreCase(position))
{
MediaPlayer mp = MediaPlayer.create(this, R.raw.click);
mp.start();
mp.setLooping(false);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
PowerManager mgr = (PowerManager)getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = mgr.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakeLock");
wakeLock.acquire();
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
wakeLock.release();
}
}
請幫我解決這個問題。
您必須在活動中廣播數據並使用WakefulBroadcastReceiver嘗試播放聲音 –
您是指將傳感器數據發送回活動? –
是通過從服務發送數據到活動 –