Android interview questions

How do you write apps for multiple screen sizes (no fixed coordinates, use nine patch drawables, favor density independent pixels over pixel). Tell the interviewee that you have not programmed for android and that they should explain the whole area to you in a way you can understand. This also tests the communication skills of the person in front of you.
　　 What are the problems publishing to the market, with the fragmentation of Android in multiple OS Versions and multiple phones.
　　 What is the basic setup of an Android app? You are programming it in Java. But it is compiled on a special compiler for android. Does that mean you can’t use third party libraries you only get as compiled jar?
　　 How do you define the user interface? .
　　 What do you have to do to test a new program on a real phone?
　　 What is the result of the compilation process (An apk that bundles resources like image and class files)