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.
