android利用spinner作成的省市区3级联动，为了简单，直接在程序中的写出了省市级区，也可以将它们存入数据库，连接数据库进行调用。感兴趣的童鞋可以看一下，算是抛砖引玉了。- android spinner made use of three provinces linkage, for simplicity, write directly to the provincial and municipal area in the program, they can also be sto