LoginButton with native Fragment

Question

I'm trying to implement the Facebook LoginButton using the tutorial here https://developers.facebook.com/docs/android/login-with-facebook/v2.0#step2

The problem is on the line authButton.setFragment(this);.

I'm using native fragments (android.app.Fragment) but setFragment expects a support Fragment (android.support.v4.app.Fragment).

EDIT: I cannot switch to support Fragments, I have a big app that uses native Fragments.

Answer 1

I think the solution you are looking for is the wrapper class below. Using this you can just call

authButton.setFragment(new NativeFragmentWrapper(this));

The wrapper is a support fragment and just passes the method calls from the facebook LoginButton to the native fragment. I'm using this and it works fine.

public class NativeFragmentWrapper extends android.support.v4.app.Fragment {
    private final Fragment nativeFragment;

    public NativeFragmentWrapper(Fragment nativeFragment) {
        this.nativeFragment = nativeFragment;
    }

    @Override
    public void startActivityForResult(Intent intent, int requestCode) {
        nativeFragment.startActivityForResult(intent, requestCode);
    }

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

Answer 2

I solved this issue by using the activity context instead of the fragment context and passing the "onActivityResult" from the Activity, to the fragment to the callbackManager.

Just follow the following instructions:

1. Don't call loginButton.setFragment(fragment). Per default, the Activity context of the LoginButton is used.

2. Add the following method inside the activity of your fragment, to catch and pass any result to the fragment:

   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       final MyFragment fragment = (MyFragment) getFragmentManager().findFragmentById(R.id.container);
       if (fragment != null) {
           fragment.onActivityResult(requestCode, resultCode, data);
       }
   }
   

3. Override onActivityResult also inside your fragment which contains the LoginButton and pass the result to the callbackManager.

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

I hope it works.