Android - Launching an app with a shake

Question

I'm a newbie to this field of android development. I'm developing an app which I need to be launched by shaking the device. How can I get this thing done? I read many threads and tried out several codes. but non of them worked. Please be kind enough to come up with the full code (from top to bottom) of particular file(or files). So that I'll be able to understand where exactly that I need to change in my code. Thank you!

Answer 1

Try this, First create your Service

public class ShakeService extends Service implements SensorEventListener {

private SensorManager sensorMgr;
private Sensor acc;
private long lastUpdate = -1;
private float x, y, z;
private float last_x, last_y, last_z;
private static final int SHAKE_THRESHOLD = 1100;



@Override
public void onCreate() {


    Toast.makeText(this,
            "Service Started", Toast.LENGTH_SHORT).show();
    sensorMgr = (SensorManager) getSystemService(SENSOR_SERVICE);
    acc=sensorMgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

    boolean accelSupported=  sensorMgr.registerListener((SensorEventListener) this, acc, SensorManager.SENSOR_DELAY_GAME);
    long curTime11 = System.currentTimeMillis();

    if (!accelSupported) {
        // on accelerometer on this device
        sensorMgr.unregisterListener((SensorEventListener) this,acc);
    }

    super.onCreate();
}


protected void onPause() {
    if (sensorMgr != null) {
        sensorMgr.unregisterListener((SensorEventListener) this,acc);
        sensorMgr = null;
    }
    return;
}


@Override
public int onStartCommand(Intent intent, int flags, int startId) {


    return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {

    if (sensorMgr != null) {
        sensorMgr.unregisterListener((SensorEventListener) this,acc);
        sensorMgr = null;
    }
    stopSelf();
    super.onDestroy();
}

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public void onSensorChanged(SensorEvent sensorEvent) {

    if (sensorEvent.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
        long curTime = System.currentTimeMillis();
        // only allow one update every 100ms.
        if ((curTime - lastUpdate) > 100) {
            long diffTime = (curTime - lastUpdate);
            lastUpdate = curTime;

            x = sensorEvent.values[SensorManager.DATA_X];
            y = sensorEvent.values[SensorManager.DATA_Y];
            z = sensorEvent.values[SensorManager.DATA_Z];

            float speed = Math.abs(x+y+z - last_x - last_y - last_z) / diffTime * 10000;

            if (speed > SHAKE_THRESHOLD) {
                Log.d("sensor", "shake detected w/ speed: " + speed);
                Toast.makeText(this, "shake detected w/ speed: " + speed, Toast.LENGTH_SHORT).show();

                      Intent myIntent= new Intent(this, MyActivity.class);
                      myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    /                 startActivity(myIntent);
                ////Here start your activity and your application will be started
            }
            last_x = x;
            last_y = y;
            last_z = z;
        }

    }

}
@Override
public void onAccuracyChanged(Sensor sensor, int i) {

 }

}

And make sure to declare your service in manifest

<service
        android:name=".ShakeService"
        android:enabled="true"
        android:exported="true"></service>

Now in your activity start service as

startService(new Intent(MainActivity.this,ShakeService.class));