Facebook login and android, what approach to use

Question

I am a bit confused with facebook login procedure.

At the moment my application works like this:

1. Login activity where user logs in and starts fragment activity
2. Fragment activity with viewpager and 3 fragments

This works, but there is a problem, everytime user starts an app Login activity is called. How can i bypass this if session is active or even better how can i implement this in my Fragment activity.

For example if there is no user logged in, login window/fragment shows and then is redirected back to viewpager and default 3 fragments.

I was following this tutorial

https://developers.facebook.com/docs/android/login-with-facebook

Problem with this tutorial is that it opens Main Fragment and thats it, there is no "redirecting" and i am not sure how to come back to my viewpager.

Answer 1

Assuming you are familiar with android and java properly use an asynctask to get the logged in facebook user using a session than you can make a decider thread in case the session.isOpen() boolean value is true go to some activity and in case it's false go to your login activity - this thread also have a similar question to yours
plus you can find some more info on sessions over here

Answer 2

I'm sorry if was unclear about my question, i found a solution googling around, i cant believe i didnt see this before:

https://developers.facebook.com/docs/android/scrumptious/authenticate/

This answered all of my questions.