Question

如何在android中运行后台服务以使用加速度计？

我已经拥有一个侦听器来检测加速度计值。但我想将其添加到后台服务中。因此，即使应用程序被杀，我也会获得价值。

请让我知道解决方案吗？

任何例子都非常感谢!!!

Answer 1

嗨，这是我的源代码检查出来

 public MyService() {
}

@Override
public IBinder onBind(Intent intent) {
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}

int count = 1;
private boolean init;
private Sensor mySensor;
private SensorManager SM;
private float x1, x2, x3;
private static final float ERROR = (float) 7.0;
private static final float SHAKE_THRESHOLD = 15.00f; // m/S**2
private static final int MIN_TIME_BETWEEN_SHAKES_MILLISECS = 1000;
private long mLastShakeTime;
private TextView counter;

@Override
public void onCreate() {

}

@Override


public void onSensorChanged(SensorEvent event) {
    if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
        long curTime = System.currentTimeMillis();
        if ((curTime - mLastShakeTime) > MIN_TIME_BETWEEN_SHAKES_MILLISECS) {

            float x = event.values[0];
            float y = event.values[1];
            float z = event.values[2];

            double acceleration = Math.sqrt(Math.pow(x, 2) +
                    Math.pow(y, 2) +
                    Math.pow(z, 2)) - SensorManager.GRAVITY_EARTH;
            Log.d("mySensor", "Acceleration is " + acceleration + "m/s^2");

            if (acceleration > SHAKE_THRESHOLD) {
                mLastShakeTime = curTime;
                Toast.makeText(getApplicationContext(), "FALL DETECTED",
                        Toast.LENGTH_LONG).show();
            }
        }
    }
}


public int onStartCommand(Intent intent, int flags, int startId) {
    Toast.makeText(this, "Start Detecting", Toast.LENGTH_LONG).show();
    SM = (SensorManager) getSystemService(SENSOR_SERVICE);
    mySensor = SM.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    SM.registerListener(this, mySensor, SensorManager.SENSOR_DELAY_NORMAL);

    //here u should make your service foreground so it will keep working even if app closed


    return Service.START_STICKY;

}

Answer 2

您已使用侦听器接收加速度计值。因此，只需创建一个实现Service的SensorEventListener并按照您已经完成的方式注册此监听器。

但是关于在应用程序被杀之后保持服务运行，我认为你应该将你的服务运行到另一个进程中，在你的AndroidManifest.xml中插入这样的东西：

 <service android:name=".YourService"
        android:process=":accel_monitor>
 </service>

如何在android中运行后台服务才能使用加速度计？

2 个答案: