(?? The complete version of the full set of source code in Chapter 12 of the Android Use Case Development Manual, with multiple use game projects.?? It includes Android mobile query system, database client, online game development, dynamic wallpaper game, mobile management system, navigation and map development (LBS), Web and mobile client development, stand-alone project mobile development, sensor and 3D game development, electronic reader and other mainstream applications. It is strongly recommended to cooperate with e-book learning for better results. This document includes the following annexes:)