http://www.androiduipatterns.com/2012/06/emerging-ui-pattern-side-navigation.html
https://github.com/mattlogan/CircleMenu/tree/master/sample
https://github.com/mattlogan/CircleMenu
https://bitbucket.org/jfeinstein10/slidingmenu/overview
http://www.androiduipatterns.com/2012/06/emerging-ui-pattern-side-navigation.html
http://developer.android.com/design/patterns/navigation-drawer.html
http://developer.android.com/training/implementing-navigation/nav-drawer.html
http://blog.csdn.net/guolin_blog/article/details/9671609
http://blog.csdn.net/w8320273/article/details/9043339
http://blog.csdn.net/a859522265/article/details/8154103