This directory holds a Java implementation of the webrtc::PeerConnection API, as well as the JNI glue C++ code that lets the Java implementation reuse the C++ implementation of the same API. To build the Java API and related tests, make sure you have a WebRTC checkout with Android specific parts. This can be used for linux development as well by configuring gn appropriately, as it is a superset of the webrtc checkout: fetch --nohooks webrtc_android gclient sync You also must generate GN projects with: --args='target_os="android" target_cpu="arm"' More information on getting the code, compiling and running the AppRTCMobile app can be found at: https://webrtc.org/native-code/android/ To use the Java API, start by looking at the public interface of org.webrtc.PeerConnection{,Factory} and the org.webrtc.PeerConnectionTest. To understand the implementation of the API, see the native code in src/jni/pc/.