Android 在一天的特定时间使用 AlarmManager 每天重复通知

Question

我需要 Android 应用程序在每天早上 8 点、下午 3 点和晚上 8 点发送通知来提醒用户。因此，当应用程序启动时，我在 MainActivity 的 onCreate() 中使用以下三行。但是，当我运行该应用程序时，所有三个通知都会同时出现，而不是在需要的时间出现。

    setRepeatedNotification(1,8,0,0); 
    setRepeatedNotification(2,15,0,0); 
    setRepeatedNotification(3,20,0,0);    

这是为什么呢？我还在此处附加了 setRepeatedNotification 函数。谢谢!

private void setRepeatedNotification(int ID, int hh, int mm, int ss) {
    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    Intent alarmIntent = new Intent(MainActivity.this, AlarmReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, ID, alarmIntent, 0);

    Calendar calendar = Calendar.getInstance();
   // calendar.set();
    calendar.set(Calendar.HOUR_OF_DAY, hh);
    calendar.set(Calendar.MINUTE, mm);
    calendar.set(Calendar.SECOND, ss);

    // Clear previous everyday pending intent if exists.
    if (null != mEverydayPendingIntent) {
        alarmManager.cancel(mEverydayPendingIntent);
    }
    mEverydayPendingIntent = pendingIntent;
    alarmManager.setRepeating(AlarmManager.RTC, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, mEverydayPendingIntent);
}

Answer 1

这是更新后的代码:

private void setRepeatedNotification(int ID, int hh, int mm, int ss) {
    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    Intent alarmIntent = new Intent(StartActivity.this, AlarmReceiver.class);
    alarmIntent.putExtra("ID",ID);
    Log.d("setRepeatedNotification", "ID:" + ID);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(StartActivity.this, ID, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    Calendar calendar = Calendar.getInstance();
    Calendar now = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, hh);
    calendar.set(Calendar.MINUTE, mm);
    calendar.set(Calendar.SECOND, ss);

    //check whether the time is earlier than current time. If so, set it to tomorrow. Otherwise, all alarms for earlier time will fire

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

    mEverydayPendingIntent = pendingIntent;
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, mEverydayPendingIntent);



}