Account in the application and authorization through Facebook and using Parse?

Question

Android

There are several questions:

• For example, there is an activity with the names SignActivity in it, we carried out authorization through a certain social network and entered the data into parse, after which, how to load data that corresponds to a given user in another activity, and how to make some connection between the user and his data on Parse itself
  
• Is there api for authorization via facebook for android 2.3
  
• Perhaps there are other ways of this implementation and which one is the most relevant and reliable
  
• Submit some articles or books on the topic
  

Answer 1

https://developers.facebook.com/docs/facebook-logi...

Answer 2

up?