Android Activity ClassNotFoundException - tried everything

Question

I\'ve just refactored an app into a framework library and an application, but now when I try and start the app in the emulator I get the following error stack trace:

Answer 1

What interfaces or parent classes does SimonSaysActivity use/extend and are they available on the version of Android you're using? I've seen similar problems where my activity implemented an API interface that wasn't available on the version of Android I was using.

In my case my activity implemented the interface PopupMenu.OnDismissListener which is only available in API 14 but when I ran the app on my 2.3 device I received a java.lang.NoClassDefFoundError exception for the activity.