I am using Facebook SDK 3.2 for login in my android app.
Login, logout functions working fine.
My Problem:
after login want to retrieve the Facebook User
I found the Solution for my Question
I have Missed the Permission for getting the facebook Profile email in My code
added the permission below my login button inside oncreate method
loginButton = (LoginButton) findViewById(R.id.login_button);
loginButton.setReadPermissions(Arrays.asList("email","user_photos"));
Now its working fine