How to access the background location change of Google Maps Android API V2?

In my application, I use Google Maps Android API v2. Even if my application is in the background and performs a task, I must obtain the current location coordinates of the location change. How can I do this?

Edit:

This is my tracking location code

LocationService.java

public class LocationService extends Service {

String TAG = "LocationService";

LocationManager mylocManager;
LocationTracker mylocListener;  

String myprovider;
database obj = new database(this);

@Override
public IBinder onBind(Intent arg0) 
{
    return null;
}

@Override
public void onDestroy() 
{    
    super.onDestroy();
    if(mylocManager!=null)
    {
        mylocManager.removeUpdates(mylocListener);
    }
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) 
{

    mylocManager   = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    mylocListener  = new LocationTracker();

    Location loc = null;

    for(String myprovider:mylocManager.getAllProviders())
    {
       loc = mylocManager.getLastKNownLocation(myprovider);
       if(loc!=null)
       {
           Log.d(TAG,"Updating with last kNown location");
           updateLocation(loc);
           break;
       }   
    }

    if(Build.FINGERPRINT.contains("generic"))
    {
        Log.d(TAG,"App running on emulator");
        mylocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mylocListener);            
    }
    else if(mylocManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER))
    {
        Log.d(TAG,"GPS Provider available");
        mylocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, mylocListener);
    }
    else if(mylocManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
    {
         Log.d(TAG,"NETWORK Provider available");
        mylocManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, mylocListener);
    }
    else
    {
        Log.w(TAG,"No provider found. Stopping service");
        stopSelf();

    }  
    return super.onStartCommand(intent, flags, startId);
}




public class LocationTracker  implements LocationListener
{
    @Override
    public void onLocationChanged(Location loc)
    {
        Log.d(TAG,"Updating exact coordinates");
        Toast.makeText(getApplicationContext(), "Location changed", Toast.LENGTH_SHORT).show();
        updateLocation(loc);
        stopSelf();
    }

    @Override
    public void onProviderDisabled(String arg0) 
    {
        stopSelf();
    }

    @Override
    public void onProviderEnabled(String arg0)
    {
    }

    @Override
    public void onStatusChanged(String arg0, int arg1, Bundle arg2)
    {
    }
}
}

resolvent:

You must create a service that will run even if the application runs in the background. This service must implement or have a locationlistener object

When onlocationchanged is triggered, you can execute the task because it indicates that you have received a new location update