android小项目开发示例大全，含20个通用具体应用程序实例源码，备忘录、播放器、谷歌地图、画图、贪吃蛇、桌面小程序等，内容全面，适合学习。-Containing 20 general purpose concrete application instance of the source code, the memorandum, the player, Google map, drawing, Snake, desktop applets comprehensive, suitable fo