AlarmManager 未设置，每次打开活动时都会发出警报
我正在尝试用它来设置每天都会响的闹钟。
String alarm = Context.ALARM_SERVICE;
Calendar calendar = Calendar.getInstance();
AlarmManager am = (AlarmManager)getActivity().getSystemService(alarm);
Intent intent = new Intent("NEW_ITEM");
PendingIntent sender = PendingIntent.getBroadcast(getActivity(), 0, intent, 0);
calendar.setTimeInMillis(System.currentTimeMillis());
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 1*AlarmManager.INTERVAL_DAY, sender);
I am trying to use this to set an alarm that goes off everyday.
String alarm = Context.ALARM_SERVICE;
Calendar calendar = Calendar.getInstance();
AlarmManager am = (AlarmManager)getActivity().getSystemService(alarm);
Intent intent = new Intent("NEW_ITEM");
PendingIntent sender = PendingIntent.getBroadcast(getActivity(), 0, intent, 0);
calendar.setTimeInMillis(System.currentTimeMillis());
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 1*AlarmManager.INTERVAL_DAY, sender);
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如果不运行它，代码对我来说看起来不错...显然，如果您每次启动活动时都设置此闹钟，则闹钟将立即响起，因为：
am.setRepeating(AlarmManager.RTC_WAKEUP, **calendar. getTimeInMillis()**, 1*AlarmManager.INTERVAL_DAY, sender);告诉警报管理器立即发出警报（第二个参数）并在一天内重复（第三个参数，假设你的常数是正确的）。如果您希望警报仅在 24 小时内启动，只需将该行更改为：
Without running it, the code looks good to me... Obviously, if you set this alarm every time you start the activity, the alarm will go off immediately since:
am.setRepeating(AlarmManager.RTC_WAKEUP, **calendar.getTimeInMillis()**, 1*AlarmManager.INTERVAL_DAY, sender);Tells the alarm manager to alert right now (2nd param) and to repeat in a day (3rd param, assuming your constant is correct).If you want the alert to start only in 24 hours, simply change the line to:
代码看起来不错，但您必须注意一件事。如果用户决定再次设置闹钟（例如，通过点击“设置闹钟”按钮），旧的闹钟将被替换。如果您想避免这种情况，请查看此主题：使用 Alarmmanager在特定时间启动服务
Code looks good, but you have to be aware of one thing. If the user decides to set the alarm again (for example, by hitting the 'set the alarm' button) the old one will be replaced. If you want to avoid this, check out this topic: Using Alarmmanager to start a service at specific time