Glide

http://blog.csdn.net/yulyu/article/details/55215718?winzoom=1

Glide 图片转换工具类
https://github.com/wasabeef/glide-transformations

利用Xfermode实现半圆角矩形抗锯齿绘制
http://www.cnblogs.com/everhad/p/6161083.html