回调函数
http://blog.csdn.net/a78270528/article/details/46918601
Android 框架
android frame work: http://blog.csdn.net/bsmmaoshenbo/article/details/52506530
http://blog.csdn.net/bsmmaoshenbo/article/details/52627219
原文：http://www.cnblogs.com/alamps/p/6068185.html