android - android 中的 PeerConnection 实例始终为空？

Question

我必须在 android 应用程序中实现 WebRTC，因为我正在使用 libjingle 库，ver-11139。在这里我总是得到 pc(PeerConnection class instance) 总是空的。我检查了值

factory(PeerConnectionFactory)
iceServers(LinkedList<IceServers>
mediaConstraints
Peer.this(PCObserver interface)) 

但它们都不为空。那为什么我总是得到空的结果。我在这里做错了吗？？？

pc = factory.createPeerConnection(iceServers, mediaConstraints, Peer.this);

编辑:

 public CallManager(TagoveApplication context, CustomSocket server, CallType callType) {
    this.server = server;
    this.context = context;
    initializeFactoryFieldTrials(); //initialize peer conn factory field trials
    PeerConnectionFactory.initializeAndroidGlobals(context, true, true, true);

    //PeerConnectionFactory.initializeAndroidGlobals(context, true, true, true, VideoRendererGui.getEGLContext());
    factory = new PeerConnectionFactory();

    iceServers.add(new PeerConnection.IceServer("turn:xxx.xxx.xxx.xxx:xxxx?transport=udp", "xxxxxxxx", "xxxxxxxxx"));

    iceServers.add(new PeerConnection.IceServer("stun:stunserver.org"));
    iceServers.add(new PeerConnection.IceServer("stun:stun.ekiga.net"));
    iceServers.add(new PeerConnection.IceServer("stun:stun.fwdnet.net"));
    iceServers.add(new PeerConnection.IceServer("stun:stun.ideasip.com"));
    iceServers.add(new PeerConnection.IceServer("stun:stun.iptel.org"));
    iceServers.add(new PeerConnection.IceServer("stun:stun.rixtelecom.se"));
    iceServers.add(new PeerConnection.IceServer("stun:stun.schlund.de"));

    pcConstraints.mandatory.add(new MediaConstraints.KeyValuePair("OfferToReceiveAudio", "true"));
    pcConstraints.mandatory.add(new MediaConstraints.KeyValuePair("OfferToReceiveVideo", "true"));
    pcConstraints.optional.add(new MediaConstraints.KeyValuePair("DtlsSrtpKeyAgreement", "true"));

    this.callType = callType;
}

创建 Peer 构造函数:

    public Peer(
        String label,
        PeerConnectionFactory factory,
        LinkedList<PeerConnection.IceServer> iceServers,
        MediaConstraints mediaConstraints,
        PeerCallbacks peerCallbacks,
        StreamChangeListener listener,
        boolean incoming){

    this.label=label;
    this.peerCBacks=peerCallbacks;

    //Create Peer connection using RTCConfiguration
    Log.d("PCTest","Peer factory value - "+String.valueOf(factory));
    Log.d("PCTest","ice servers size - "+iceServers.size());
    Log.d("PCTest","media constraints - "+String.valueOf(mediaConstraints));

    PeerConnection.RTCConfiguration rtcConfig = new PeerConnection.RTCConfiguration(iceServers);
    rtcConfig.bundlePolicy = PeerConnection.BundlePolicy.MAXBUNDLE;
    rtcConfig.rtcpMuxPolicy = PeerConnection.RtcpMuxPolicy.REQUIRE;
    rtcConfig.keyType = PeerConnection.KeyType.ECDSA;
    Log.d("","");
    this.pc = factory.createPeerConnection(rtcConfig, mediaConstraints, this);
    Log.d("PCTest","Peer constructor called pc value - "+String.valueOf(this.pc));

    this.streamListener=listener;
    log("new +"+" "+label+ "  "+(peerCallbacks!=null? "notNull":"issNull")+" ++ "+incoming);
}

Answer 1

答案是针对官方 webRTC android API compile 'org.webrtc:google-webrtc:1.0.+'

在创建 IceServers 时，你应该使用正确的 TlsCertPolicy。如果您的 stun/turn 服务器不安全，例如:stun:stun1.l.google.com:19302 而不是 stuns:stun1.l.google.com:19302 那么您应该将 TLS 证书策略设置为 TLS_CERT_POLICY_INSECURE_NO_CHECK。可以使用 IceServerBuilder 以这种方式完成:

List<PeerConnection.IceServer> iceServers = new ArrayList<>();
PeerConnection.IceServer.Builder iceServerBuilder = PeerConnection.IceServer.builder("stun:stun1.l.google.com:19302");
iceServerBuilder.setTlsCertPolicy(PeerConnection.TlsCertPolicy.TLS_CERT_POLICY_INSECURE_NO_CHECK); //this does the magic.
PeerConnection.IceServer iceServer =  iceServerBuilder.createIceServer();
iceServers.add(iceServer);
localPeer = peerConnectionFactory.createPeerConnection(iceServers, sdpConstraints,sdpObserver);