Android Facebook SDK - Null GraphUser
问题 I am trying to implement the Facebook SDK in my Android application but so far I had no success. I have followed all the steps in the following tutorial by Facebook: https://developers.facebook.com/docs/getting-started/facebook-sdk-for-android/3.0/ Yet, nothing worked - the GraphUser always returns null. I have added the debug hash into Facebook and I have done everything that I was told to do. Your help will be much appreciated! Thanks in advance. 回答1: Oh, that I also had same issue today, I