Hello, I'm beginning learn Android programming and now I want to do music player as practice. I know that I have to launch foreground service when user press "Play" to play music while app is off. I'm going to use ExoPlayer 2 library. So, at first, I don't know, how to notify the service about changing playlist. And also I can't figure out how notify UI about playing music info(how long it will play until the end and seekbar which shows progress)
— modified on May 6, 2019, 2:48:54 PM