Target api 28

[yokkohsan]

it may not support api 28. i have tried to build and run, but it doesnot output audio :(

[tkirshboim]

Thanks for reporting this. I could reproduce this.
The issue seems to be that Android P requires a new Foreground permission to be requested when starting a service in the foreground:
https://developer.android.com/preview/behavior-changes#fg-svc