Issue in getting access token from installed Facebook Android app

Question

I am using Facebook SDK 3.0 for authentication. It works fine when facebook app is not installed on the device. If the facebook app is already installed on the device, I am unable to fetch the Access token value.

I am using the same code given in helloFacebookSampleActivity.java in the tutorial.

Answer 1

This is due to the Single Sign-On feature provided by facebook. It allows user to sign in to your app if he/she is already logged-in, in the native facebook app, without having to re-enter the username and password.

To get this working you have to submit your Android key hash to your facebook profile. For more information on this please read the Step 4 given here.