如何在GAE Backend为第一个Android应用程序生成的第二个Android应用程序中包含客户端库

I have successfully developed an android application with Google App Engine as the Backend. Now I want to develop 2nd android application and want to connect it to the same App Engine of the 1st App. In short. 2 android applications with same App Engine at the backend hence common datastore.I have successfully developed an android applic