How to check if user is logged in with FB SDK 4.0 for Android?

Question

A few days ago I implemented FB Login to my APP, and today I found out that most of the things I have implemented are now deprecated.

Before, I was using Sess

Answer 1

According to facebook documentation you can do this by:

AccessToken accessToken = AccessToken.getCurrentAccessToken();
boolean isLoggedIn = accessToken != null && !accessToken.isExpired();