public void onClick(View view) {
        displayNotification();
    }
    

	protected void displayNotification()
    {
        //---PendingIntent to launch activity if the user selects
        // this notification---
        Intent i = new Intent(this, NotificationView.class);
        
		i.putExtra("notificationID", notificationID);
		
		
		 PendingIntent pendingIntent =
		            PendingIntent.getActivity(this, 0, i, 0);

		long[] vibrate = new long[] { 100, 250, 100, 500};

//Notification Channel - novo od Android O

        String NOTIFICATION_CHANNEL_ID = "my_channel_01";
        CharSequence channelName = "hr.math.karga.MYNOTIF";
        int importance = NotificationManager.IMPORTANCE_LOW;
        NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, importance);
        notificationChannel.enableLights(true);
        notificationChannel.setLightColor(Color.RED);
        notificationChannel.enableVibration(true);
        notificationChannel.setVibrationPattern(vibrate);

//za sve verzije
        NotificationManager nm = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);

// za Notification Chanel

        nm.createNotificationChannel(notificationChannel);




//ovako je i u starim verzijama, jedino dodano .setChannelId (za stare verzije to brisemo)

        Notification notif = new Notification.Builder(this)
                .setTicker("Reminder: meeting starts in 5 minutes")
                .setContentTitle("Meeting with customer at 3pm...")
                .setContentText("this is the second row")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setWhen(System.currentTimeMillis())
                .setShowWhen(true)
                .setContentIntent(pendingIntent)
                .setVibrate(vibrate)
                .setChannelId(NOTIFICATION_CHANNEL_ID)
                .build();
        //najnovije, od API level 26.1.0., .setWhen ide po defautlu ovdje na currentTimeMillis

/*        final NotificationCompat.Builder notif = new NotificationCompat.Builder(this,NOTIFICATION_CHANNEL_ID)

                .setDefaults(Notification.DEFAULT_ALL)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setVibrate(vibrate)
                .setSound(null)
                .setChannelId(NOTIFICATION_CHANNEL_ID)
                .setContentTitle("Meeting with customer at 3pm...")
                .setContentText("this is the second row")
                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                .setTicker("Reminder: meeting starts in 5 minutes")
                .setContentIntent(pendingIntent)
                .setAutoCancel(false); */

// za sve verzije

        nm.notify(notificationID, notif);
    }