I was unable to include the Facebook Android SDK in the normal way so I downloaded a jar and added it to Android Studio. For some strange reason I get an error Unresolved reference: FacebookSdk
even though I can see the class in the Project view:
If I am doing the wrong thing can somebody please give a lucid explanation of how to download and use the Facebook SDK in Android Studio 3.
Edit
I need to use the Facebook SDK in my app and I need to download it and add it 'offline'.