本项目是一个省市区三级联动的小例子源码，有PopWindow和Fragment两种显示方式，自带全国省市区数据，喜欢的朋友可以自己下载研究一下。-This project is a small example of the provincial three linkage of the source code, there are two kinds of Fragment and PopWindow display, with the country s urban data, like f