promixitylistner working even after unregistring it - service

Question

I am devolping an application which turns the screen off and on based proximity sensor. The code i wrote sucessful turns the screen off and on.
This is the acivity from which the proximity sensors are registed and unregistered
MainActivity.java
public class MainActivity extends Activity {
public String TAG = "MainActivity";
BackgroundService mService;
boolean mBound = false;
boolean firstTime = true;
Intent BackgroundIntent ;
private ServiceConnection mConnection = new ServiceConnection() {
#Override
public void onServiceDisconnected(ComponentName arg0) {
// TODO Auto-generated method stub
Log.w(TAG, "Service Disconeted");
mBound = false;
mService = null;
}
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
LocalBinder binder = (LocalBinder)service;
mService = binder.getService();
mBound=true;
if(firstTime){
MainActivity.this.onStart();
}
firstTime = false;
Log.w(TAG, "Service Connectedd");
}
};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.w(TAG, "onCreate()");
setContentView(R.layout.activity_main);
Button buttonStart = (Button)findViewById(R.id.button1);
Button buttonStop = (Button)findViewById(R.id.button2);
buttonStart.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
mService.enableSensor();
Log.w(TAG, "ButtonStart Clicked");
}
});
buttonStop.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(mBound){
mService.disableSensor();
}
Log.w(TAG, "ButtonSTOP Clicked");
}
});
startService(new Intent(this,BackgroundService.class));
}
#Override
public void onStart(){
super.onStart();
Log.w(TAG, "onStart Method");
Intent intent = new Intent(getApplicationContext(),BackgroundService.class);
getApplicationContext().bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
#Override
protected void onStop(){
super.onStop();
if(mBound){
getApplicationContext().unbindService(mConnection);
Log.w(TAG, "Unbinding the service");
}
Log.w(TAG, "onStop Method");
}
}
This is the service which has a SensorEventListner which which listens to the changes in the proximity sensor
BackgroundService.java
public class BackgroundService extends Service{
public String TAG = "BackgroundService";
private final IBinder mBinder = new LocalBinder();
private SensorManager mSensorManager ;
private Sensor mProximitySensor ;
private SensorEventListener mSenosorEventListener;
private PowerManager.WakeLock proximityWakeLock;
public float maxSensorValue;
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
Log.e(TAG, "Binding with backgroundService");
return mBinder;
}
public class LocalBinder extends Binder{
BackgroundService getService(){
return BackgroundService.this;
}
}
#Override
public void onCreate(){
Log.w(TAG, "BackgroundService Created");
proximityWakeLock = ((PowerManager)getSystemService("power")).newWakeLock(32, "");
proximityWakeLock.setReferenceCounted(false);
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mProximitySensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
maxSensorValue = mProximitySensor.getMaximumRange();
mSenosorEventListener = new SensorEventListener() {
#Override
public void onSensorChanged(SensorEvent event) {
// TODO Auto-generated method stub
if(event.sensor.getType() == Sensor.TYPE_PROXIMITY ){
if(event.values[0] == maxSensorValue)
{
Log.w(TAG, "Object moved ****AWAY*****");
screanTurnOn();
}
else{
Log.w(TAG, "Object moved ****NEAR******");
screanTurnOFF();
}
}
}
#Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Sensor Accuracy Changed", Toast.LENGTH_SHORT).show();
}
};
}
#Override
public void onDestroy(){
mSensorManager.unregisterListener(mSenosorEventListener);
Log.w(TAG, "BackgroundService is Destroyed");
super.onDestroy();
}
public void screanTurnOFF(){
if(proximityWakeLock.isHeld()){
this.proximityWakeLock.release();
Log.e(TAG,"WakeLock is released");
}
}
public void screanTurnOn(){
if(!proximityWakeLock.isHeld())
proximityWakeLock.acquire();
while(proximityWakeLock.isHeld()){
Log.e(TAG, "WakeLock is acurqerd");
return;
}
}
public void enableSensor(){
if(mProximitySensor == null){
Log.w(TAG, "No Proximity detector found");
}else{
mSensorManager.registerListener(mSenosorEventListener, mProximitySensor,SensorManager.SENSOR_DELAY_NORMAL);
Log.w(TAG, "Proximity detector Enabled : "+ mProximitySensor.getName());
}
}
public void disableSensor(){
mSensorManager.unregisterListener(mSenosorEventListener,mProximitySensor);
Log.w(TAG, "Proximity Detector Disabled : " + EnableProximitySensor);
}
}
I have two buttons, one that registers the SensorEventListner to the sensor manager, and one to unregister it. The first button works perfectly. When i click on the second button, the ProximityEventListen remain unregistered.The sensoEventLister still works but the app will not show any Log messages from the BackGroundService.
If i comment out the screenTurnON() and screenTurnOFF() functions, the code works perfectly.
Please Help me out