Detect Android device rotation, using Accelerometer sensor

package com.AndroidRotation;

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.TextView;

public class AndroidRotationActivity extends Activity implements SensorEventListener{
 
 private SensorManager manager;
 private Sensor sensor;
 
 TextView azimuth, pitch, roll;
 
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
    
      manager = (SensorManager)getSystemService(SENSOR_SERVICE);
      sensor = manager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    
      azimuth = (TextView)findViewById(R.id.azimuth);
      pitch = (TextView)findViewById(R.id.pitch);
      roll = (TextView)findViewById(R.id.roll);
  }

 @Override
 protected void onPause() {
  super.onPause();
  manager.unregisterListener(this);
 }

 @Override
 protected void onResume() {
  super.onResume();
  manager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL);
 }

 @Override
 public void onAccuracyChanged(Sensor arg0, int arg1) {
  // TODO Auto-generated method stub
  
 }

 @Override
 public void onSensorChanged(SensorEvent arg0) {
  
  azimuth.setText("Azimuth: " + String.valueOf(arg0.values[0]));
      pitch.setText("Pitch: " + String.valueOf(arg0.values[1]));
      roll.setText("Roll: " + String.valueOf(arg0.values[2]));
  
 }
}