I fixed it by going to Settings ( ⌘ / Ctrl + , ) ➤ Compiler and unchecking "Use external assembly".
Then I went to the Build ➤ Rebuild Project and worked fine.
I hope this helps someone else too.
Edit:
Please note that with Android Studio 0.2.13 (I didn’t use anything between 0.2.9 and 0.2.13, so I didn’t notice when it left) No Use external assembly option.
To overcome this problem now, you need to do the following:
Go to Settings ( ⌘ / Ctrl + , ) ➤ Compiler ➤ Android Compilers and check " Power mode jumbo ".
source share