Shake the Andorid Sensor

Package com. llm; import java. util. list; import android. app. activity; import android. hardware. sensor; import android. hardware. sensorEvent; import android. hardware. sensorEventListener; import android. hardware. sensorManager; import android. OS. bundle; import android. widget. toast; public class testsens%ti%extends Activity {private static final int FORCE_THRESHOLD = 900; private long lastShakeTime; // priv Ate long presentShakeTime; private long duration; // time difference private float lastX = 0.0f; private float lastY = 0.0f; private float lati = 0.0f; private float presentX = 0.0f; private float presentY = 0.0f; private float presentZ = 0.0f; private float currenForce; // The shaking speed @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); Senso RManager sm = (SensorManager) getSystemService (SENSOR_SERVICE); List <Sensor> ls = sm. getSensorList (Sensor. TYPE_ACCELEROMETER); if (ls. size ()> 0) {Sensor s = ls. get (0); sm. registerListener (new SensorEventListener () {public void onSensorChanged (SensorEvent event) {// return if (event. sensor. getType ()! = Sensor. TYPE_ACCELEROMETER | event. values. length <3) return; presentX = event. values [SensorManager. DATA_X]; presentY = event. values [SensorManager. DATA_Y]; presentZ = event. values [SensorManager. DATA_Z]; presentShakeTime = System. currentTimeMillis (); if (presentShakeTime-lastShakeTime> 100) {duration = (presentShakeTime-lastShakeTime); lastShakeTime = presentShakeTime; currenForce = Math. abs (presentX + presentY + presentZ-lastX-lastY-lati)/duration * 10000; if (currenForce> FORCE_THRESHOLD) {// The shaking rate is greater than 900 Toast. makeText (testsens?ti=. this, "Shake success", 1000 ). show () ;}lastx = presentX; lastY = presentY; lati = presentZ ;}}; public void onAccuracyChanged (Sensor sensor, int accuracy) {}, s, SensorManager. SENSOR_DELAY_NORMAL );}}}