我在特定时间收到通知，请参阅我的代码：
//Create alarm manager
AlarmManager alarmMgr0 = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
//Create pending intent & register it to your alarm notifier class
Intent intent0 = new Intent(this, AlarmReceiver_maandag_1e.class);
intent0.putExtra("uur", "1e");
PendingIntent pendingIntent0 = PendingIntent.getBroadcast(this, 0, intent0, 0);
//set timer you want alarm to work (here I have set it to 8.30)
Calendar timeOff9 = Calendar.getInstance();
timeOff9.set(Calendar.HOUR_OF_DAY, 8);
timeOff9.set(Calendar.MINUTE, 30);
timeOff9.set(Calendar.SECOND, 0);
//set that timer as a RTC Wakeup to alarm manager object
alarmMgr0.set(AlarmManager.RTC_WAKEUP, timeOff9.getTimeInMillis(), pendingIntent0);
除了一件事外，这很完美。
使用警报管理器将通知设置为 8:30 如果我在 8:30 之后启动应用程序，例如 9:00，通知仍然显示..
闹钟是否有可能在 8 点 30 分响，但不会更晚？
编辑
对于任何有同样问题的人，这里是解决方案：
把它放在你的广播接收器中：
long current_time = System.currentTimeMillis();
Calendar timeOff9 = Calendar.getInstance();
timeOff9.set(Calendar.HOUR_OF_DAY, 8);
timeOff9.set(Calendar.MINUTE, 35);
timeOff9.set(Calendar.SECOND, 0);
long limit_time = timeOff9.getTimeInMillis();
if (current_time > limit_time) {
//nothing
} else {
//show notification
}