Example for SensorListener in Android?

public class TestActivity extends Activity implements SensorEventListener {

   private SensorManager mgr;

   private Sensor sensorAccelerometer;

   private long lastUpdate;

   private float lastX = 0.5f;

   private float lastY = 0.5f;

   private float lastZ = 0.9f;

   

   @Override

   protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

      setActionBarContentView(R.layout.testactivity);

   

      mgr = (SensorManager)getSystemService(SENSOR_SERVICE);

      sensorAccelerometer = mgr.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

   }

  

   @Override

   protected void onResume() {

      super.onResume();

      mgr.registerListener(this, sensorAccelerometer, SensorManager.SENSOR_DELAY_UI);

   }

  

   @Override

   protected void onPause() {

      super.onPause();

      mgr.unregisterListener(this);

   }

 

   @Override

   public void onAccuracyChanged(Sensor sensor, int accuracy) {

      // TODO Auto-generated method stub

   }

 

   @Override

   public void onSensorChanged(SensorEvent event) {

      if(event.sensor.getType() == Sensor.TYPE_ACCELEROMETER){

         long currTime = System.currentTimeMillis();

    

         if((currTime - lastUpdate) > 1000){ //just scan every second

            lastUpdate = currTime;

      

            float xAxis = event.values[SensorManager.DATA_X];

            float yAxis = event.values[SensorManager.DATA_Y];

            float zAxis = event.values[SensorManager.DATA_Z];

     

            String comment = inMovement(xAxis, yAxis, zAxis) ? "not moving" : "in movement";

     

            publishValues(xAxis, yAxis, zAxis, comment);

     

            lastX = xAxis;

            lastY = yAxis;

            lastZ = zAxis;

         } 

      }

   }

 

   private boolean inMovement(float xAxis, float yAxis, float zAxis) {

      final float tolerance = 0.5f;

   

      if(Math.abs(xAxis - lastX) <= tolerance && Math.abs(yAxis - lastY) <= tolerance && Math.abs(zAxis - lastZ)<=tolerance){

         return true;

      }else

         return false;

      }

 

      private void publishValues(float x, float y, float z, String comment) {

         TextView mainText =(TextView)findViewById(R.id.textView);

   

         mainText.setText("X: " + x + " - Y: " + y + " - Z: " + z + "\nComment: " + comment);

      }

}