Abhi1code

peerConnection = peerConnectionFactory.createPeerConnection(rtcConfig, new CustomPeerConnectionObserver() {

            @Override
            public void onIceCandidate(IceCandidate iceCandidate) {
                super.onIceCandidate(iceCandidate);
                // 
            }

            @Override
            public void onDataChannel(DataChannel dataChannel) {

Abhi1code

package com.matrixf...n;

import org.webrtc.SdpObserver;
import org.webrtc.SessionDescription;

public class CustomSdpObserver implements SdpObserver {

    public CustomSdpObserver(){
        
    }

Abhi1code

package com.m...;

import com.mat...;

import org.webrtc.DataChannel;
import org.webrtc.IceCandidate;
import org.webrtc.MediaStream;
import org.webrtc.PeerConnection;
import org.webrtc.RtpReceiver;

Abhi1code

package com.m...;

import org.webrtc.DataChannel;

public class CustomDataChannelObserver  implements DataChannel.Observer {

    public CustomDataChannelObserver(){
    }

    @Override

Abhi1code

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.matr..."
        minSdkVersion 21
        targetSdkVersion 29
        versionCode 1