Multiple login forms on Android app

Question

My application will allow user to log in using Email, Twitter or Facebook. I'm using Facebook Android SDK on its last version.

How can I check if a user is already logged in at the onCreate method so I can display the login options if the user is logged out or redirect to the main activity if he is logged in?

I'm currently using the following code:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    uiHelper = new UiLifecycleHelper(this, callback);
    uiHelper.onCreate(savedInstanceState);
}


private void onSessionStateChange(Session session, SessionState state, Exception exception) {
// this method is not run

Answer 1

Look at

Session session = Session.getActiveSession();
if (session != null && session.isOpened()) {
  // You have an active cached session
}

That is probably the best way to detect.

Answer 2

Please check my library https://github.com/antonkrasov/AndroidSocialNetworks

It allows you easily implement login for Facebook, Twitter, LinkedIn and Google Plus.