In this lesson, you'll learn how to use your own custom layout files, with custom names that match your applications file nomenclature. In other words, you will provide your own custom layout files with custom names for the audio player as well as the audio control playback.
There is no mention of the PlayerNotificationManager. This is a very important feature because almost always we want to let the player in background. In this course I was looking for a way to customize the controls in the notification (like change play, pause buttons, hide them, etc...).
I think this course should be updated to cover the background and notification customization as well.