Notification Icon vom Foreground Service ändern

private void showNotification() {
        
        CharSequence text = "G-MoN scanning is activ";
        
        Notification notification = new Notification(R.drawable.service1, text,
                System.currentTimeMillis());

        
        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
                new Intent(this, de.carknue.gmon2.gmon.class), 0);

        notification.setLatestEventInfo(this, "G-Mon", text, contentIntent);
        notification.flags |= Notification.FLAG_ONGOING_EVENT;

        
        startForeground(0x7f0a0036,notification);
     
    }

int icon = R.drawable.notification_icon;
CharSequence tickerText = "Hello";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);