//permission

<uses-feature android:name="android.hardware.sensor.accelerometer" android:required="true" />

<uses-permission android:name="android.permission.VIBRATE"></uses-permission>

//code

public class MainActivity extends AppCompatActivity implements SensorEventListener {

Sensor sensor;

SensorManager sensorManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

sensorManager=(SensorManager)getSystemService(Context.SENSOR_SERVICE);

sensor=sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

}

@Override

public void onResume(){

super.onResume();

sensorManager.registerListener(this,sensor,SensorManager.SENSOR_DELAY_NORMAL);

}

@Override

public void onPause(){

super.onPause();

sensorManager.unregisterListener(this);

}

float xOld=0;

float yOld=0;

float zOld=0;

float ThreaShold=3000;

long OldTime=0;

@Override

public void onSensorChanged(SensorEvent event) {

float x =event.values[0];

float y =event.values[1];

float z =event.values[2];

long CurrentTime= System.currentTimeMillis();

if ((CurrentTime-OldTime)>100){

long TimeDiff=CurrentTime-OldTime;

OldTime=CurrentTime;

float speed=Math.abs(x+y+z-xOld-yOld-zOld)/TimeDiff *10000;

if (speed>ThreaShold){

Vibrator v=(Vibrator)getSystemService(Context.VIBRATOR_SERVICE);

v.vibrate(500);

Toast.makeText(getApplicationContext(),"Shook",Toast.LENGTH_LONG).show();;

}

}

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

}

}