Best Practices - Linking to Action

I have a network service that runs in the background. I have this global variable mConnectioninside Activity

protected ServiceConnection mConnection = new ServiceConnection() {

    public void onServiceConnected(ComponentName className, IBinder binder) {
        serviceobject = ((NetworkService.MyBinder) binder).getService();
    }

    public void onServiceDisconnected(ComponentName className) {
        serviceobject = null;
    }
};

and then I bind the service in Activity onCreate(..)using

bindService(new Intent(this, NetworkService.class), 
                 mConnection,Context.BIND_AUTO_CREATE);

The NetworkService class has an inner class MyBinder

public class MyBinder extends Binder {
    NetworkService getService() {
        return NetworkService.this;
    }
}

Now, to call any service method from Activity, I use serviceobject, and I create AsyncTaskfor each method call. (I know that calling service methods from Activity will invalidate the use of services. This is for lightweight methods that don't require a lot of computation)

This helps me directly process data from Serviceusing serviceobject. I untie the service inActivity onDestroy()

@Override
protected void onDestroy()
{
    unbindService(mConnection);
    super.onDestroy();
}

Is this the best way to do this, or am I mistaken somewhere?