Real Time API using WebRTC in Android(java)

Hi, I am trying to use the Real Time API to build an Android app with Java as the backend. I have been able to build this successfully using web sockets, however, I have not gotten it to work with WebRTC. Would anyone mind sharing useful links and/or tutorials on using WebRTC with Java (or even Kotlin)? Or does anyone have an open source project on GitHub that wouldn’t mind linking their code as an example? Thanks in advance.