Question

I develop an app that shows date in status bar as icon(an image for every day,1,2,3,…),now my problem is that when the date change i can’t sense it.
is there any way that can catch the change of date and update the status bar icon.

    mNM  =(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    int resId = getResources().getIdentifier("p_"+Day_Num, "drawable", getPackageName());
    Notification notification = new Notification(resId, "", System.currentTimeMillis());
    RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.custom_notification);
    contentView.setImageViewResource(R.id.image, resId);
    contentView.setTextViewText(R.id.title, Day);
    contentView.setTextViewText(R.id.text, Date);
    contentView.setOnClickPendingIntent(R.id.imageView1, PendingIntent.getActivity(this, 0, new Intent(this, Option.class),0));
    notification.contentView = contentView;
    Intent notificationIntent = new Intent(this, Option.class);
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
    notification.contentIntent = contentIntent;
    notification.defaults = Notification.FLAG_NO_CLEAR;
    mNM.notify(NOTIFICATION, notification);

when I use servic Calservice.java:

 public void onCreate() {
      //code to execute when the service is first created
       alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        Intent intent = new Intent(ALARM_REFRESH_ACTION);
        pendingIntent = PendingIntent.getBroadcast(this, 0, intent,
                PendingIntent.FLAG_CANCEL_CURRENT);
        alarmReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                alarmCounted++;
                Message msg = myHandler.obtainMessage(ALARM_CODE, intent);
                myHandler.sendMessage(msg);
            }
        };
        IntentFilter filter = new IntentFilter(ALARM_REFRESH_ACTION);
        registerReceiver(alarmReceiver, filter);
        mNM  =(NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        utils.getCurrentShamsidate();
        startRepeating();
   }

       public void startRepeating() {
        // We get value for repeating alarm
        int startTime =1000;
        long intervals =1000;
        // We have to register to AlarmManager
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.add(Calendar.MILLISECOND, startTime);
        // We set a repeating alarm
        alarmManager.setRepeating(AlarmManager.RTC, calendar
                .getTimeInMillis(), intervals, pendingIntent);
    }
            private void showNotification() {

    mNM.cancelAll();
    utils.getCurrentShamsidate();
    int resId = getResources().getIdentifier("p_"+Day_Num, "drawable", getPackageName());
    Notification notification = new Notification(resId, "", System.currentTimeMillis());
    RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.custom_notification);
    contentView.setImageViewResource(R.id.image, resId);
    contentView.setTextViewText(R.id.title, Day);
    contentView.setTextViewText(R.id.text, Date);
    contentView.setOnClickPendingIntent(R.id.imageView1, PendingIntent.getActivity(this, 0, new Intent(this, Option.class),0));
    notification.contentView = contentView;
    Intent notificationIntent = new Intent(this, Option.class);
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
    notification.contentIntent = contentIntent;
    mNM.notify(NOTIFICATION, notification);
  }
    public void doscan() {
            String Day = Day_Num;
            utils.getCurrentShamsidate();
            if(!Day_Num.equals(Day))
                showNotification();
        }

Answer 1

@hamhame, Why don’t you try an AlarmManager, to set alarm on Every morning at 12:00 Am. in this way you can set your opration and do things pretty easily..

This link can help you more on how to set a repeating alarm for Time interval of 24 hours.

for listening to TIme/Date change by user see this answer.

you need to register a receiver(with required action given in above link) via manifest (if want to listen always ) or register in Activity/service according to your need. and in receiver you will got to know what time has been set by getting current time and can modify you AlarmReceiver too.