Could not find class XXX referenced from method XXX.

http://stackoverflow.com/questions/14765910/could-not-find-class-xxx-referenced-from-method-xxx-yyy

Since some ADT-Version you have to set which libraries / projects should be exported too.

Project-Propiertes -> Java Build Path -> Order and Export -> Check your Sources and other Libraries you are using.

Do these Export-Settings for your Core- and Android-Project.

Then it should work fine on Android.