https://blog.csdn.net/acm_th/article/details/50986569
https://blog.csdn.net/mulanlong/article/details/52853598
https://blog.csdn.net/liuwan1992/article/details/52832264
AutoCompleteTextView 的用法
原文：https://www.cnblogs.com/Nora-F/p/10471631.html
