Getting Contcts from other accounts

Getting Contcts from Gmail account

Reference Link:-
http://androidwarzone.blogspot.in/2011/07/android-oauth-full-example-with-source.html

Demo Source code



Getting Contcts from Yahoo account

Reference Link:-
http://stackoverflow.com/questions/10051824/how-to-integrate-yahoo-in-my-android-application



Getting Contcts from Facebook account 

Reference Link:-
https://github.com/facebook/facebook-android-sdk/