Question

我是android新手，目前正在研究Notifications。

我有两种要显示的通知。一个是每周提醒，另一个是每月提醒。

这是我设置每周提醒的方式：

manager.setRepeating(AlarmManager.RTC_WAKEUP, currentTime, AlarmManager.INTERVAL_DAY *7, pendingIntent);

这是我设置每月提醒的方法：

long monthlyDuration = getDuration();
manager.setRepeating(AlarmManager.RTC_WAKEUP, currentTime, monthlyDuration, pendingIntent);




private long getDuration(){
        // get todays date
        Calendar cal = Calendar.getInstance();
        // get current month
        int currentMonth = cal.get(Calendar.MONTH);

        // move month ahead
        currentMonth++;
        // check if has not exceeded threshold of december

        if(currentMonth > Calendar.DECEMBER){
            // alright, reset month to jan and forward year by 1 e.g fro 2013 to 2014
            currentMonth = Calendar.JANUARY;
            // Move year ahead as well
            cal.set(Calendar.YEAR, cal.get(Calendar.YEAR)+1);
        }

        // reset calendar to next month
        cal.set(Calendar.MONTH, currentMonth);
        // get the maximum possible days in this month
        int maximumDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH);


        cal.set(Calendar.DAY_OF_MONTH, maximumDay);
        long thenTime = cal.getTimeInMillis(); 



        return (thenTime); 

    }

这是通知代码：

   int importance = NotificationManager.IMPORTANCE_HIGH;

    @Override
    public void onReceive(Context context, Intent intent) {

       NotificationManager notificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
        Intent notificationIntent = new Intent(context, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
                notificationIntent, 0);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "default");

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            CharSequence name = context.getString(R.string.channel_name);
            String description = context.getString(R.string.col_week_rem_description);
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
            channel.setDescription(description);
            notificationManager.createNotificationChannel(channel);
        }

        builder.setAutoCancel(false);
        builder.setChannelId(CHANNEL_ID);
        builder.setContentTitle(context.getResources().getString(R.string.app_name));
        builder.setContentText(context.getResources().getString(R.string.notification_text));

        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

            builder.setSmallIcon(R.drawable.ic_launcher_notification);

            int myColor =
                    context.getResources().getColor(R.color.notification_icon_bg);

            builder.setColor(myColor);

        }
        else {

            builder.setSmallIcon(R.drawable.ic_launcher);

        }

        builder.setContentIntent(pendingIntent);
//        builder.setOngoing(true);
//        builder.setNumber(100);
        notificationManager.notify(NOTIFICATION_ID,builder.build());


    }

我面临的问题是，从设置显示提醒的选项开始，通知在一分钟或两分钟内弹出。我想做的是，当用户选择每周提醒时，他/她应该在7天后的同一时间收到通知。也就是说，如果我今天选择每周三提醒。然后，从用户选择每周提醒之日起7天后，我应该在3点钟收到通知。每月提醒也以相同的方式起作用。

我在这里和其他地方经历了很多线程，但是无法解决问题。谁能帮我解决问题。

谢谢。

Answer 1

public static void setReminder(Context ctx) {

        Calendar setcalendar = Calendar.getInstance();
        // setcalendar.set(Calendar.DAY_OF_WEEK, 3);

        setcalendar.set(Calendar.HOUR_OF_DAY, //notification hr);
        setcalendar.set(Calendar.MINUTE, //notification min.);
        setcalendar.set(Calendar.SECOND, //notification sec.);
        setcalendar.set(Calendar.DAY_OF_WEEK, //notification day);



        Intent intent = new Intent(ctx, NotificationReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager am = (AlarmManager) ctx.getSystemService(Activity.ALARM_SERVICE);

        long timeMs = setcalendar.getTimeInMillis();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            am.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, timeMs, pendingIntent);
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            am.setExact(AlarmManager.RTC_WAKEUP, timeMs, pendingIntent);
        } else {
            am.set(AlarmManager.RTC_WAKEUP, timeMs, pendingIntent);
        }

        Log.e("", "setReminder: reminder has been set");
    }

设置提醒后的一分钟内会弹出每周通知

1 个答案: