Apps Android App "froze" w/Facebook Login MainFragment

[blitzJan]

I setup FB Login into an Activity and also created a class MainFragment.java which follows FB's tuturial perfectly. Found here: https://developers.facebook.com/docs/howtos/androidsdk/3.0/login-with-facebook/

The login works well, but the App is stuck in the Fragment and therefore the rest of my App is not responding. Probably a simple fix. Wondering what I missed to add to ensure the remaining codes still executes? Here is my code added for the FB Login from my MainActivity class:

public class MainActivity extends FragmentActivity {

private MainFragment mainFragment;

@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		if (savedInstanceState == null) {
	        // Add the fragment on initial activity setup
	        mainFragment = new MainFragment();
	        getSupportFragmentManager()
	        .beginTransaction()
	        .add(android.R.id.content, mainFragment)
	        .commit();
	    } else {
	        // Or set the fragment from restored state info
	        mainFragment = (MainFragment) getSupportFragmentManager()
	        .findFragmentById(android.R.id.content);
	    }