android - Android Monthly 中的重复闹钟

Question

我在设置重复警报时遇到了一些问题，该警报应在每个月或每两个月的特定日期(由用户输入)触发。到目前为止，我正在使用通知服务、BroadcastReceiver 以及未决的 Intent。我无法理解的是:

alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY * 30*month, pendingIntent);

我们如何在这里设置函数，这将如何影响电池生命周期，是否还有其他事情(例如将日期存储在数据库中并且仅在触发时调用它？)等等。1.Notification Service 扩展服务

public void onStart(Intent intent, int startId) {
        super.onStart(intent, startId);
        // Getting Notification Service
        mManager = (NotificationManager) this.getApplicationContext()
                .getSystemService(
                        this.getApplicationContext().NOTIFICATION_SERVICE);
        /*
         * When the user taps the notification we have to show the Home Screen
         * of our App, this job can be done with the help of the following
         * Intent.
         */
        Intent intent1 = new Intent(this.getApplicationContext(), com.expandablelistItems.demo.adapter.DynamicActivity.class);

        Notification notification = new Notification(R.drawable.ic_launcher,
                "Payment of your demoReminder", System.currentTimeMillis());

        intent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP
                | Intent.FLAG_ACTIVITY_CLEAR_TOP);

        PendingIntent pendingNotificationIntent = PendingIntent.getActivity(
                this.getApplicationContext(), 0, intent1,
                PendingIntent.FLAG_UPDATE_CURRENT);

        notification.flags |= Notification.FLAG_AUTO_CANCEL;

        notification.setLatestEventInfo(this.getApplicationContext(),
                "demo", "Payment of your demoReminder",
                pendingNotificationIntent);

        mManager.notify(0, notification);
    }

2。重复的方法

if  (current_Month == Calendar.FEBRUARY){//for feburary month)
            GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();    
            if(cal.isLeapYear(calendar.get(Calendar.YEAR))){//for leap year feburary month  
                alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY * 29*month, pendingIntent);
                Toast.makeText(getActivity(), "februry", Toast.LENGTH_SHORT).show();}
            else{ //for non leap year feburary month
                Toast.makeText(getActivity(), "feb", Toast.LENGTH_SHORT).show();
                alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY * 28*month, pendingIntent);
            }
        }

这是广播接收器

 @Override
    public void onReceive(Context context, Intent intent) {
    // When our Alaram time is triggered , this method will be excuted (onReceive)
    // We're invoking a service in this method which shows Notification to the User
     Intent myIntent = new Intent(context, NotificationService.class);
     context.startService(myIntent);
   }

其中notificationService是第一个代码扩展服务

Answer 1

您应该避免使用间隔为 30 天的 SetRepeating，原因有二:

<醇>

它不会在每个月的同一天重复(也可能会跳过一个月)。

自 API 19 以来，SetRepeating 是不精确的，其功能与 SetInexactRepeating 类似，这意味着可能会在整个间隔持续时间内移动警报(在您的情况下最多 30 天) .
如 docs 中所述:

Your alarm's first trigger will not be before the requested time, but it might not occur for almost a full interval after that time

只要您希望警报在确切的日期触发，您应该使用 set(int, long, PendingIntent) 并在每次实例后计算下一个警报。