参考修改链接: https://www.jianshu.com/p/dcfde6e997e2 github下载地址: https://github.com/donkingliang/GroupedRecyclerViewAdapter 修改地址: https://download.csdn.net/download/liuyz0420/11945999 主要是去androidx.recyclerview:recyclerview 引用v7自带的recyclerview
