public static int APP_IS_RUNNING_NOTIFICATION_ID = 6;
...
notificationManager.notify(APP_IS_RUNNING_NOTIFICATION_ID, buildAppIsRunningNotificationForOverstayEnabled());

private Notification buildAppIsRunningNotificationForOverstayEnabled() {

        long timeValue = overstayManager.calculateRemainingTimeMillis();

        String notificationText = timeValue >= 0
            ? context.getString(R.string.overstay_notification_text)
            : context.getString(R.string.overstay_notification_text_time_over);

        String remainingTime = timeValue >= 0
                ? LongExtensionsKt.toHHmmssString(timeValue)
                : context.getString(R.string.empty);

        CharSequence notificationTitle;

        if(timeValue >= TimeUnit.MINUTES.toMillis(15))
            notificationTitle = Html.fromHtml(context.getString(R.string.overstay_remaining_time_title, remainingTime));
        else if(timeValue >= 0)
            notificationTitle = Html.fromHtml(context.getString(R.string.overstay_remaining_time_title_under_15, remainingTime));
        else
            notificationTitle = context.getString(R.string.overstay_remaining_time_title_timer_over);

        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), timeValue >= TimeUnit.MINUTES.toMillis(15)
                ? R.layout.custom_notification_with_action_overstay
                : R.layout.custom_notification_with_action_overstay_under_15_min);
        remoteViews.setTextViewText(R.id.title, notificationTitle);
        remoteViews.setTextViewText(R.id.text, notificationText);

        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context)
                .setLargeIcon(BitmapFactory.decodeResource(context.getResources(), R.drawable.parkanizer_small_logo_new))
                .setSmallIcon(R.drawable.notify_white)
                .setColor(ContextCompat.getColor(context, R.color.colorPrimary))
                .setContent(remoteViews)
                .setTicker(notificationText)
                .setAutoCancel(false)
                .setOngoing(true)
                .setPriority(Notification.PRIORITY_MAX)
                .setContentIntent(returnToAppPendingIntent);

        if(overstayManager.shouldPlayNotificationSound())
            notificationBuilder.setSound(Uri.parse("android.resource://" + context.getPackageName() + "/" + R.raw.parkanizer_notification_positive));

        Notification notification = notificationBuilder.build();
        hideSmallIcon(notification);

        Log.d("NOTIF", "CREATED");
        return notification;
    }