AlarmManager 警报在触发时间过去时立即调用

Question

下面是我用来在从外部提取数据时创建警报的代码 API。如果设置的时间是过去的时间，则闹钟会在设置后立即响起（间隔 2 秒）。例如，如果我将闹钟设置为 4 月 10 日 8:00 AM，即 4 月 11 日 10:00 AM（过去时间）。设置后立即启动闹钟。

public static final int ALARM_REQUEST_CODE = 1001;
public static AlarmManager alarmManager = (AlarmManager) EHCApplication.getInstance().getApplicationContext().getSystemService(Context.ALARM_SERVICE);
public static Intent alarmIntent = new Intent(EHCApplication.getInstance().getApplicationContext(), AlarmReceiver.class);
public static PendingIntent pendingIntent = PendingIntent.getBroadcast(EHCApplication.getInstance().getApplicationContext(), ALARM_REQUEST_CODE, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);



public static void setAlarm(Reminder rm) {
    for (ScheduledTime time : rm.getScheduledTime()) {
        Bundle bundle = new Bundle();
        bundle.putParcelable(Constants.ARGS_SELECTED_MEDICINE, medicine);
        alarmIntent.putExtras(bundle);
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, time.getTimeInMilliseconds(), AlarmManager.INTERVAL_DAY, pendingIntent);
    }
}

我希望闹钟在下次到达时间时响起。我哪里出错了？

Answer 1

这是预期的行为。

来自 setRepeating()（和其他 AlarmManager 设置方法）的文档：

If the stated trigger time is in the past, the alarm will be triggered immediately

如果您想防止这种情况发生，那么只需不要设置具有过去触发时间的警报（例如，在设置警报时检查 System.currentTimeMillis()）。

Answer 2

好吧，我运行遇到了同样的问题，经过研究我发现当闹钟设置为过去时间时，闹钟会运行。资料来源：Here is documentation of Alarm Manager - setRepeating()

所以，我通过检查是否 "Calendar time is in past from system time than I add a day"

解决了这个问题

工作代码：

    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, min);
    calendar.set(Calendar.SECOND, 0);
    alarmManager.cancel(pendingIntent);

    // Check if the Calendar time is in the past
    if (calendar.getTimeInMillis() < System.currentTimeMillis()) {
        Log.e("setAlarm","time is in past");
        calendar.add(Calendar.DAY_OF_YEAR, 1); // it will tell to run to next day
    }


    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, id, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager alarmManager =  (AlarmManager)getSystemService(ALARM_SERVICE);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent); //Repeat every 24 hours

AlarmManager 警报在触发时间过去时立即调用

AlarmManager alarm is called immediately when trigger time is in the past

android

alarmmanager