这个问题是教程比较好解决的类型；我建议查看 AlarmManager 文档，甚至查看第 26 章:背景The Big Nerd Ranch 上的服务:Android 编程指南；如果不是，关于如何创建闹钟应用程序的简单教程可能会有所帮助.

This question is the type that is better solved by a tutorial; I would suggest looking into the AlarmManager documentation and even checking chapter 26: Background Services on The Big Nerd Ranch: Android Programming Guide; if not maybe a simple tutorial on how to create an alarm clock app might help.