http://blog.csdn.net/kan1kan5/article/details/39755475
http://blog.csdn.net/ithomer/article/details/7523328
http://www.cnblogs.com/feisky/archive/2010/01/11/1644482.html
http://www.itzhai.com/android-animation-used-to-achieve-control-of-animation-effects-and-use-of-interpolator-and-animationlistener.html
interpolator
http://blog.csdn.net/wzg_1987/article/details/8989686
rotate 动画
http://trinea.iteye.com/blog/1493885
http://www.linuxgraphics.cn/animation/android_tween_animation.html
自定义progressbar
http://blog.csdn.net/feng88724/article/details/7409032
http://blog.csdn.net/chenlove1/article/details/41758977
http://zhujianjia.iteye.com/blog/1148835