应用程序启动时触发Android通知 [英] Android Notification triggering on application startup

问题描述

我正在尝试使我的每日通知服务正常运行，但遇到了问题.

I'm trying to get my Daily Notification Service working properly but I am stuck with an issue.

我应该只在将来的一天的特定时间 收到通知，但是我注意到了

I should receive a notification only at a specific time of the day in the future but I noticed that

if (time_that_i_set_for_notification < current_time_of_the_day) notification triggers at the boot of my app

这是错误的，因为在这种情况下，通知应该仅在第二天触发 ，而不是在我启动应用后立即触发.

That's wrong because in that condition, the notification should trigger only the next day, not in the instant I launch the app.

这是我要使事情正常进行的尝试:

Here's my attempt to get the things working:

我在MainActivity的onCreate()方法中调用此:

private void scheduleNotification(int hour, int minute){
    Intent notificationIntent = new Intent(this, NotificationReceiver.class);
    notificationIntent.putExtra("notifId", notifId);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, notifId, notificationIntent, 0);

// Set the alarm to start at approximately at a time
        DatePicker datePicker = new DatePicker(this);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.DAY_OF_MONTH, datePicker.getDayOfMonth());
        if(calendar.getTime().compareTo(new Date()) < 0) calendar.add(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 12);
        calendar.set(Calendar.MINUTE, 12);

        AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
// With setInexactRepeating(), you have to use one of the AlarmManager interval
// constants--in this case, AlarmManager.INTERVAL_DAY.
        alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, pendingIntent);
    }

我认为添加if(calendar.getTime().compareTo(new Date()) < 0) calendar.add(Calendar.DAY_OF_MONTH, 1);会达到所需的结果.

I thought that adding if(calendar.getTime().compareTo(new Date()) < 0) calendar.add(Calendar.DAY_OF_MONTH, 1); I would've achieved the result I needed.

谢谢您，祝您愉快.

推荐答案

好吧，那里的检查有误，如果您进行更改，则应该能够解决您的问题.

Ok there's a wrong check there, if you change it, you should be able to solve your issue.

我们在这里:

Intent notificationIntent = new Intent(this, NotificationReceiver.class);
    notificationIntent.putExtra("notifId", notifId);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, notifId, notificationIntent, 0);

// Set the alarm to start at approximately at a time
        DatePicker datePicker = new DatePicker(this);
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.set(Calendar.DAY_OF_MONTH, datePicker.getDayOfMonth());
        //if(calendar.getTime().compareTo(new Date()) < 0) calendar.add(Calendar.DAY_OF_MONTH, 1);
        calendar.set(Calendar.HOUR_OF_DAY, 14);
        calendar.set(Calendar.MINUTE, 50);
        if (calendar.getTimeInMillis() < System.currentTimeMillis()) calendar.setTimeInMillis(calendar.getTimeInMillis() + AlarmManager.INTERVAL_DAY);
        AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
// With setInexactRepeating(), you have to use one of the AlarmManager interval
// constants--in this case, AlarmManager.INTERVAL_DAY.

    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, pendingIntent);

我评论了//if(calendar.getTime().compareTo(new Date()) < 0) calendar.add(Calendar.DAY_OF_MONTH, 1); ，因为它是不必要的.

I commented //if(calendar.getTime().compareTo(new Date()) < 0) calendar.add(Calendar.DAY_OF_MONTH, 1); because it should be unnecessary.

让我知道它是否有效.

更新:您应该彻底检查处理您的日常通知的服务是否消耗大量资源.高耗电量的电池应用程序会打扰您的用户.

UPDATE: You should totally check whether the Service that handles your daily notification is high consume or not. A High-draining battery app would bother your users.

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