I cannot change this feeling: again, the Android developers came up with something new and leave everybody in the dark about how they would think the feature is used.
I
It's not as expensive as you think! All you need to do is creating a notification channel and bind it to notification.
You can solve this in two ways but for both of them you need to create a notification channel with a specific channel id.
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
String id = "my_channel_01";
int importance = NotificationManager.IMPORTANCE_LOW;
NotificationChannel mChannel = new NotificationChannel(id, name,importance);
mChannel.enableLights(true);
mNotificationManager.createNotificationChannel(mChannel);
First way is to set channel for notification in constructor:
Notification notification = new Notification.Builder(MainActivity.this , id).setContentTitle("Title");
mNotificationManager.notify("your_notification_id", notification);
Second way is to set the channel by Notificiation.Builder.setChannelId()
Notification notification = new Notification.Builder(MainActivity.this).setContentTitle("Title").
setChannelId(id);
mNotificationManager.notify("your_notification_id", notification);
Hope this helps