下拉刷新

下拉刷新：http://blog.youkuaiyun.com/ryantang03/article/details/8196058

下拉刷新框架讲解：http://blog.youkuaiyun.com/leehong2005/article/details/12567757

通用下拉刷新：http://blog.youkuaiyun.com/bboyfeiyu/article/details/39718861

下拉刷新注释：http://blog.youkuaiyun.com/superharder/article/details/42146065

support v4 下拉刷新组件SwipeRefreshLayout：http://www.stormzhang.com/android/2014/03/29/android-swiperefreshlayout/

Inbox下拉刷新组件：http://www.stormzhang.com/android/2014/10/27/android-swiperefreshlayout/

BeautifulRefreshLayout：https://github.com/android-cjj/BeautifulRefreshLayout