[Android] setRemoteDescription appears to hang

[Benjamin Efron]

I am new to Android and WebRTC and I have been struggling to try to get p2p video working between a native android app and a website. On my android app, it appears that setRemoteDescription either hangs or fails silently. None of the print or Log statements in the observer ever appear in the Android Monitor (if I should be looking elsewhere please tell me), and the print and log statements that I have right after setRemoteDescription() never appear either. If there is any other information that you need to help me solve this issue please tell me. The relevant code from my app is as follows:

if (receivedJson.has("sdp")) {
                    System.out.println("ADDING SESSION DESCRIPTION");

                    String sdpStr = receivedJson.getJSONObject("sdp").getString("sdp");

                    SessionDescription sdp = new SessionDescription(SessionDescription.Type.OFFER, sdpStr);

//                    System.out.println("NEW SDP");
//                    System.out.println(sdpStr + "\n\n");

                    System.out.println("Setting remote description");
                    peerConnection.setRemoteDescription(new CallbackObserver("SetRemoteDescription"), sdp);

                    // create the answer to the session description
                    Log.d("SDP_LISTENER","CREATING ANSWER");
                    System.out.println("Creating answer");
                    peerConnection.createAnswer(new SdpObserver() {
                        @Override
                        public void onCreateSuccess(SessionDescription sessionDescription) {
                            System.out.println("SUCCESSFULLY CREATED ANSWER");
                            // set the answer to our local session description
                            peerConnection.setLocalDescription(new CallbackObserver("SET_LOCAL_SDP"), sessionDescription);

                            // package the response and send it to the server
                            try {
                                JSONObject jsonObject = new JSONObject();
                                jsonObject.put("sdp", sessionDescription.toString());
                                in_scope_ws.sendText(jsonObject.toString());

                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }

CallbackObserver class:

    private class CallbackObserver implements SdpObserver {

        private String TAG;

        public CallbackObserver(String TAG) {
            this.TAG = TAG;
        }

        @Override
        public void onCreateSuccess(SessionDescription sessionDescription) {
            Logging.d(TAG, "SUCCESSFULLY CREATED remote description");
            Log.d(TAG, "SUCCESSFULLY CREATED remote description");
            System.out.println("SUCCESSFULLY CREATED remote description");
//            while (true);
        }

        @Override
        public void onSetSuccess() {
            Logging.d(TAG, "SUCCESSFULLY SET remote description");
            Log.d(TAG, "SUCCESSFULLY SET remote description");
            System.out.println("SUCCESSFULLY SET remote description");
//            while(true);
        }

        @Override
        public void onCreateFailure(String s) {
            Logging.d(TAG, "Failed to CREATE remote description");
            Log.e(TAG, "Failed to CREATE remote description");
            System.out.println("Failed to CREATE remote description");
//            while(true);
        }

        @Override
        public void onSetFailure(String s) {
            Logging.d(TAG, "Failed to SET remote description");
            Log.e(TAG, "Failed to SET remote description");
            System.out.println("Failed to SET remote description");
//            while(true);
        }
    }