http://blog.csdn.net/lmj623565791/article/details/42056859
http://blog.csdn.net/lmj623565791/article/details/38067475
http://blog.csdn.net/guolin_blog/article/details/43536355
android动画
原文：http://www.cnblogs.com/CoolRandy/p/4460733.html
