从Android-Library-Project开始活动

after a long search I couldn't find any appropriate solution. I have a Android-Library Project with nearly all code for the application. From the main activity in the library project I start an Intent to en explicit Activity A. In my derived Project, which uses the library Project, I have extended this Activity A and added some new code. The problem is that the the Superclass of Activity A will respond and not the derived class.after a long search I couldn't find any appropr