It might be very trivial question, But I couldn\'t find any option to attach javadoc/source with local jar dependencies (in libs folder) in android project. I can\'t believe
I've found & tested a way in which we can add the javadocs without loosing them after a gradle sync.
file:///opt/android-sdk/extras/google/google_play_services/docs/reference
This placed the same JAVADOC entry in the xml identified by Jason but doesn't disappear after doing a sync with gradle