简单调用windows的系统关闭命令实现定时关机和倒计时关机的功能的小程序 直接导入eclipse就可以用了。 -Sleep timer and countdown shutdown function by a simple call to the windows system shutdown command procedure directly into eclipse can be used.

定时关机功能，可以自动调用windows命令，实现后台定时关机，而且不需要申请权限就可以实现-ming shutdown function can automatically call the windows command, to achieve back-off timer, and does not require the application permissions can be achieved