本项目是本人学习安卓编程时的练习作品
主要功能为当手机连接到指定WIFI，或断开WIFI连接，或到指定的时间时，自动修改手机的铃声状态
可以修改为震动、响铃与静音三种模式
目前已知的问题：
在android6.0的手机上测试时，一切正常，但在android7.0（华为荣耀V8）上测试时，总是过一段时间就无法使用
如有大神愿意指出代码应如何修改更好，本人感激不尽
This project is my practice when learning Android programming
The main function is to automatically change the ringtone status of the phone when the phone is connected to the specified WIFI, or the WIFI connection is disconnected, or at the specified time
Can be modified to three modes:Ringing, Vibrate, Silent
Currently known issues:
When testing on android6.0 phone, everything is normal, but when tested android7.0 (Huawei Glory V8), after a while, it just doesn't work
If anyone is willing to point out how the code should be modified better, I am grateful