JakeWharton/HanselAndGretel — comment on commit 03de3bde82d96936092330ddd053f6f5791c0a59
File: library/src/android/support/v4/app/FragmentBreadCrumbs.java line 19
By JakeWharton:

How are you compiling the project? Creating a new Android project from existing sources works perfectly from me. It has to be implemented as a library project and not just a .jar, unfortunately.