警报管理器参考内容为
如果指定的触发时间已过去,则将触发警报。
If the stated trigger time is in the past, the alarm will be triggered immediately.
我在应用程序中遇到此问题。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);此问题是否有解决方法?
Is there any workaround to this problem?
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我写了一些代码来估计警报的设置时间在当前时间之前。上面是带有相应更改的部分:
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 { }什么如果 setTimestamp 在 currentTimestamp 之前,我应该使用 alarmManager 吗? ?
What should I the alarmManager to in case setTimestamp is before currentTimestamp ?
推荐答案您不需要创建时间戳。您可以使用日历。
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);我还要提到,从KitKat开始,如果您的 targetSdkVersion 为19或更高, AlarmManager#set()方法不正确。如果您想在某个确切时间触发警报,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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