Andorid 圆形菜单

http://blog.csdn.net/rwyz1314/article/details/6754645

http://blog.csdn.net/android_tutor/article/details/7645486

http://www.linuxidc.com/Linux/2011-04/34416.htm

http://www.zcool.com.cn/work/ZNzY1MTU2.html