Verify user Facebook Login using Facebook SDK for Android
<p>I am using the Facebook SDK to be able to make a Facebook login in my application. When my application starts, I want to check if the user is already logged-in into his account or not. If the user is already logged-in, my application will show the main interface. But if the user is not logged-in, my application is supposed to show the login-in dialog. I am stocked at determining whether the user is already logged-in or not. How will I check it?</p>
