(Content introduction: Since the Android mobile platform opened its source code in November 2007, it has attracted countless developers. The Android Market has nearly 70000 mobile uses and 1 billion downloads. Now, more than 60 smart phones from major manufacturers use the Android platform. This tutorial will explain the basic knowledge of Android platform through a practical application, and inform students how to write the application of Android platform. Teacher profile: Engelsma Dulimarta Jonathan Engelsma is an assistant professor of the School of Computing at Weigu State University. He obtained his doctorate from Michigan State University in 1993, and has been in business for 20 years)