Issue with app activities flow using Facebook SDK for Android

Question

I'm following the Facebook tutorial on how to implement the Facebook Login flow to my Android app. It works fine with UiLifecycleHelper and Session implementations:

private UiLifecycleHelper uiHelper;
private Session.StatusCallback callback = 
    new Session.StatusCallback() {
    @Override
    public void call(Session session, 
            SessionState state, Exception exception) {
        onSessionStateChange(session, state, exception);
    }
};

In the onSessionStateChange i check if the state is opened and start the MainActivity, and everything works ok. My doubt here is: do i have to reimplement this code (UiLifeCycleHelper, onSessionStateChange) on every Activity of my app or not? And if not, how i can control the Facebook Session flow through the activities?

Answer 1

Works for Facebook Android SDK 3.X only

You have to reimplement this code for each activity which uses Facebook SDK. Moving all Facebook-related code to a superclass can be a good solution (e.g. FacebookSdkActivity).

To get the session anywhere in your app, use Session.getActiveSession() method. For example, if you want to check if a user is connected to Facebook, you can use:

Session.getActiveSession() != null && Session.getActiveSession().isOpened();