Profile.getCurrentProfile() returns null after logging in (FB API v4.0)

Question

For some reason Profile.getCurrentProfile() shows up null at times right after logging into FaceBook, using FB API v4.0.

This is causing problems for me

Answer 1

I have a simpler suggestion than the other answers here.

There is no need to register a login callback with:

registerCallback(mCallbackManager, new FacebookCallback() { ... }

Instead, whenever you need user data (like on button click) - start tracking profile changes with:

new ProfileTracker() {
    @Override
    protected void onCurrentProfileChanged(Profile oldProfile, Profile profile) {
        stopTracking();

        Log.d(TAG, profile.getFirstName());
        Log.d(TAG, profile.getLastName());
        Log.d(TAG, String.format("https://graph.facebook.com/%s/picture?type=large", profile.getId()));
    }
}.startTracking();

And then start the Facebook login process by:

LoginManager.getInstance().logInWithReadPermissions(getContext(), Arrays.asList("public_profile"));

For the above code to work you of course need to prepare the usual stuff in your Activity:

private CallbackManager mCallbackManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    mCallbackManager = CallbackManager.Factory.create();
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (FacebookSdk.isFacebookRequestCode(requestCode) &&
            mCallbackManager.onActivityResult(requestCode, resultCode, data)) {
        // do nothing
    } else {
        super.onActivityResult(requestCode, resultCode, data);
    }
}

Also do not forget to modify the AndroidManifest.xml file.