Apps facebook login causes app to crash on startup

[grafight]

I've been following the facebook login setup guide and i've set it all up with no compiler errors but when i try to run it, the app just crashes.

Here's the main activity:

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;

public class MainActivity extends FragmentActivity{
    
	private MainFragment mainFragment;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);
    	setContentView(R.layout.main);
        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);
        }
        
    }
    
    
}

Heres the main fragment:

import com.facebook.SessionState;
import com.facebook.Session;
import com.facebook.UiLifecycleHelper;
import com.facebook.widget.LoginButton;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.app.Fragment;

public class MainFragment extends Fragment{
	
	private static final String TAG = "MainFragment";
	private UiLifecycleHelper uiHelper;
	
	@Override
	public View onCreateView(LayoutInflater inflater, 
	        ViewGroup container, 
	        Bundle savedInstanceState) {
	    View view = inflater.inflate(R.layout.main, container, false);
	    
	    LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
	    authButton.setFragment(this);

	    return view;
	}
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	    uiHelper = new UiLifecycleHelper(getActivity(), callback);
	    uiHelper.onCreate(savedInstanceState);
	}
	
	private void onSessionStateChange(Session session, SessionState state, Exception exception) {
	    if (state.isOpened()) {
	        Log.i(TAG, "Logged in...");
	    } else if (state.isClosed()) {
	        Log.i(TAG, "Logged out...");
	    }
	}
	
    private Session.StatusCallback callback = new Session.StatusCallback() {
        @Override
        public void call(Session session, SessionState state, Exception exception) {
            onSessionStateChange(session, state, exception);
        }
    };
    
    @Override
    public void onResume() {
        super.onResume();
        
        Session session = Session.getActiveSession();
        if (session != null &&
               (session.isOpened() || session.isClosed()) ) {
            onSessionStateChange(session, session.getState(), null);
        }
        uiHelper.onResume();
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        uiHelper.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    public void onPause() {
        super.onPause();
        uiHelper.onPause();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        uiHelper.onDestroy();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        uiHelper.onSaveInstanceState(outState);
    }

}

not sure what else to do, i added the activity and the facebook appid to the manifest xml. This is my first experience with android programming (and facebook sdk) so I could just be missing some simple key point. any help?

 

[zonk]

I'm not conversant with the FB SDK (concerning Java) but my first Q is, what do the logs in logcat say? If they aren't helpful i'd put in loads more Log comments to see where it gets too...

 

[grafight]

I actually ended up solving the problem but it had something to do with the location of the meta-data in the manifest xml as well as adding an extra facebook login activity that i was unaware of.

 

[Broham32]

Out of curiosity, how did you end up solving this? I'm having the exact same issue.