如果当天的闹钟时间已过，android会阻止立即触发闹钟服务 [英] android prevent immediate trigger of alarm service if alarm time has passed for the day

问题描述

警报管理器的参考说

如果规定的触发时间在过去，则会触发警报立即.

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

我在我的应用程序中遇到了这个问题.这是我的警报管理器代码:

I am facing this problem in my application. Here is my alarm manager code :

Intent myIntent = new Intent(getActivity(), DinnerAlarmReceiver.class);
                pendingDinnerIntent = PendingIntent.getBroadcast(getActivity(), 0, myIntent, 0);

                Calendar calendar = Calendar.getInstance();
                calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
                calendar.set(Calendar.MINUTE, minute);

                alarmManager.set(AlarmManager.RTC_WAKEUP,
                        calendar.getTimeInMillis(), pendingDinnerIntent);

是否有解决此问题的方法?

Is there any workaround to this problem?

-----编辑------

我写了一些代码来估计闹钟的设置时间是否在当前时间之前.这是上面有相应变化的部分:

I have written some code to estimate if the set time for the alarm is before the current time . Here is the above portion with corresponding changes :

Calendar calendar = Calendar.getInstance();
                long currentTime = calendar.getTimeInMillis();
                calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
                calendar.set(Calendar.MINUTE, minute);
                long setTime = calendar.getTimeInMillis();
                Timestamp setTimestamp = new Timestamp(setTime);
                Timestamp currentTimestamp = new Timestamp(currentTime);
                if (setTimestamp.after(currentTimestamp))
                {
                    alarmManager.set(AlarmManager.RTC_WAKEUP,
                            calendar.getTimeInMillis(), pendingDinnerIntent);
                }
                else
                {
                }

如果 setTimestamp 在 currentTimestamp 之前，我应该如何使用 alarmManager ?

What should I the alarmManager to in case setTimestamp is before currentTimestamp ?

推荐答案

您不需要创建 Timestamps.你可以用你的 Calendar 做到这一点.

You don't need to create Timestamps. You can do it with your Calendar.

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
calendar.set(Calendar.MINUTE, minute);

if(calendar.before(Calendar.getInstance())) {
    calendar.add(Calendar.DATE, 1);
}

alarmManager.set(AlarmManager.RTC_WAKEUP,
    calendar.getTimeInMillis(), pendingDinnerIntent);

我还要提一下，从 KitKat 开始，如果您的 targetSdkVersion 是 19 或更高版本，则 AlarmManager#set() 方法不准确.如果您希望闹钟在准确的时间触发，则需要使用 setExact*() 方法.

I would also mention that as of KitKat, if your targetSdkVersion is 19 or above, the AlarmManager#set() method is not exact. If you want your alarm to fire at an exact time, you'll need to use a setExact*() method.

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