java - 如何在特定时间自动启动 AlarmActvity

Question

我的数据库包含 7 天的餐桌时间，例如：星期五：上午 8 点、上午 10 点、下午 12 点、下午 14 点。星期一：早上 7 点，早上 9 点......

等等 。

现在我想让我的活动警报在那些特定时间自动从睡眠中上升。

我想为同一活动自动创建每日警报。但是在这一天的最后一个闹钟之后应该删除所有的闹钟。

我的代码：

  Calendar cur_cal = new GregorianCalendar();
  cur_cal.setTimeInMillis(System.currentTimeMillis());

  Calendar cal = new GregorianCalendar();
   cal.add(Calendar.DAY_OF_YEAR, cur_cal.get(Calendar.DAY_OF_YEAR));
   cal.set(Calendar.HOUR_OF_DAY, 14);
   cal.set(Calendar.MINUTE, 54);
   cal.set(Calendar.SECOND, cur_cal.get(Calendar.SECOND));
   cal.set(Calendar.MILLISECOND, cur_cal.get(Calendar.MILLISECOND));
   cal.set(Calendar.DATE, cur_cal.get(Calendar.DATE));
    cal.set(Calendar.MONTH, cur_cal.get(Calendar.MONTH));

    //Create a new PendingIntent and add it to the AlarmManager
     Intent intent = new Intent(this, AlarmReceiverActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this,
     12345, intent, PendingIntent.FLAG_CANCEL_CURRENT);
     AlarmManager am =
     (AlarmManager)getSystemService(Activity.ALARM_SERVICE);
     am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
      pendingIntent);
         }