It just tries out this article https://medium.com/@usamawizard/step-by-step-guide-building-your-app-with-webrtc-android-sdk-made-simple-ff892c3a24ff
To see result go to https://antmedia.io/webrtc-samples/webrtc-player/
To see result go to https://antmedia.io/webrtc-samples/webrtc-publish-webrtc-play/ But keep attention to streamId