Hey I know this was asked before, but none of the solutions seem to help.
This is NOT a duplicate
I have used the Facebook SDK before on an earlier project, now I started a new one and I get this weird error.
Though I still get this error and can't find out why.
Worth to mention, when I tried to use the facebook class, it gave me an error with an option of "fix project", which I did and still didn't work, might be related?
This is common error. Just remove FacebookSDK project from Properties->Java Build Path->Projects . This project should be referenced from Properties->Android
For more information, see this answer: Could not find Library.apk!