相关疑难解决方法(0)

背景： 我有一个在 Android 7.1 上运行的 Android 应用程序。使用 AlarmManage 设置重复任务，以便每天在特定时间执行任务。代码如下：

AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
long startInMs = getComing9AM();
Intent intent = ...; //an intent to be run when alarm time is up.
PendingIntent ScheduledIntent = PendingIntent.getBroadcast(context, id, intent, 0);
am.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, startInMs, ScheduledIntent);


private long getComing9AM(){
    long now = System.currentTimeMillis();
    long today = getToday9AM();
    return (now < today? today:getTomorrow9AM());
}

private long getToday9AM(){
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, 9);
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);
    return calendar.getTimeInMillis();
}

private long getTomorrow9AM(){
    return …

在我的应用程序中,用户加入计划,然后第二天中午会有一个警报通知.这是我的代码:

首先,我在AlarmManager中设置一个警报,如下所示:

//set alarm to the next day 12:00 noon of the join date
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");  
try {  
    alarm_date = format.parse(join_date);
} catch (ParseException e) {  
    e.printStackTrace();  
}

GregorianCalendar calender = new GregorianCalendar();
calender.setTime(alarm_date);
calender.add(Calendar.DATE, 1);
calender.add(Calendar.HOUR_OF_DAY, 12);
//calender.add(Calendar.HOUR_OF_DAY, 14); //temp testing data
//calender.add(Calendar.MINUTE, 43);

AlarmManager am = (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(ctx, AlarmReceiver.class);
am.set(AlarmManager.RTC_WAKEUP, calender.getTimeInMillis(), PendingIntent.getBroadcast(ctx, 1, i, PendingIntent.FLAG_UPDATE_CURRENT));

然后,在预定的时间,它会触发接收器,如下所示:

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) { …