一个可以展开的多级列表，以树的形式组织数据，完成了折叠和展开动画-A multi-level list can be expanded in order to organize the data in the form of a tree, complete the folding and unfolding animation

一个安卓上的，树状列表封装工具demo，已写有例子。可以在组织架构等情况下使用，很赞-A Andrews on the tree list packaging tools demo, has written examples. Under organization can use, etc., it is praise