我正在开发一个聊天应用程序并完成它。现在我也想实现视频聊天。经过大量研究后，我决定使用“WebRTC”库。
我做了什么？
1) 能够在本地服务器上运行 AppRtcDemo 并且在浏览器之间运行良好。
参考：http ://www.webrtc.org/reference/getting-started
2）能够构建Android AppRtcDemo。但是当我运行它时说“跨源不支持”。
经过研究，我在 webrtc 讨论中发现，要解决这个问题，我需要设置自己的转服务器。
3）所以我安装了webrtc推荐的最新的rfc5766TurnServer。我成功运行转服务器。
参考：http ://code.google.com/p/rfc5766-turn-server/
我对 ApprtcDemo (web) 和 (Android) 进行了以下更改以使用我的 Turn 服务器
1）apprtc.py
代替：
turn_url = 'https://computeengineondemand.appspot.com/'
turn_url = turn_url + 'turn?' + 'username=' + user + '&key=4080218913'
指向我的轮到服务器：
turn_url = 'http://192.168.5.85:3478/?service=turn&username=biraj'
2) index.html
代替：
var pcConfig = {{ pc_config|safe }};
和：
var pcConfig = {"iceServers": [{"url": "stun:stun.l.google.com:19302"}, {"url":"turn:biraj@192.168.5.85:3479", "credential":"0x5b04123c3eec4cf0be64ab909bb2ff5b"}]};
安卓
1)AppRTCDemoActivity.java
代替：
roomInput.setText("https://apprtc.appspot.com/?r=");
使用我的本地 apprtc 服务器：
roomInput.setText("http://192.168.5.86:8080/?r=");
2) AppRTCClient.java
在private PeerConnection.IceServer requestTurnServer(String url){}功能
代替：
connection.addRequestProperty("origin", "https://apprtc.appspot.com");
和：
connection.addRequestProperty("origin", "http://192.168.5.86:8080");
3) /assets/channel.html
代替：
<script src="https://apprtc.appspot.com/_ah/channel/jsapi"></script>
和：
<script src="http://192.168.5.86:8080/_ah/channel/jsapi"></script>
现在我的问题是为什么这在浏览器之间有效，但在 android AppRtcDemo 和浏览器之间无效。
当我在进行上述更改后在 android 上运行 AppRtcDemo 时，本地相机预览在右上角开始并且消息提示“等待 ICEcandidates”然后什么也没有发生。
提前致谢。
感谢所有人支持我的问题。在 ApprtcDemo 经历了漫长的艰难旅程后，我取得了成功，并且运行良好。我正在发布解决方案。
找到“ GAEChannelClient.java ”java 文件。
并进行如下更改。
/*
* libjingle
* Copyright 2013, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.appspot.apprtc;
import java.io.InputStream;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.webkit.ConsoleMessage;
import android.webkit.JavascriptInterface;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
/**
* Java-land version of Google AppEngine's JavaScript Channel API:
* https://developers.google.com/appengine/docs/python/channel/javascript
*
* Requires a hosted HTML page that opens the desired channel and dispatches JS
* on{Open,Message,Close,Error}() events to a global object named
* "androidMessageHandler".
*/
public class GAEChannelClient {
private static final String TAG = "GAEChannelClient";
private WebView webView;
private final ProxyingMessageHandler proxyingMessageHandler;
/**
* Callback interface for messages delivered on the Google AppEngine
* channel.
*
* Methods are guaranteed to be invoked on the UI thread of |activity|
* passed to GAEChannelClient's constructor.
*/
public interface MessageHandler {
public void onOpen();
public void onMessage(String data);
public void onClose();
public void onError(int code, String description);
}
/** Asynchronously open an AppEngine channel. */
@SuppressLint("SetJavaScriptEnabled")
public GAEChannelClient(Activity activity, String token, MessageHandler handler) {
webView = new WebView(activity);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setAllowFileAccessFromFileURLs(true); // Maybe you
// don't
// need this
// rule
webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
webView.setWebChromeClient(new WebChromeClient() { // Purely for
// debugging.
public boolean onConsoleMessage(ConsoleMessage msg) {
Log.d(TAG, "console: " + msg.message() + " at " + msg.sourceId() + ":" + msg.lineNumber());
return false;
}
});
webView.setWebViewClient(new WebViewClient() { // Purely for debugging.
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Log.e(TAG, "JS error: " + errorCode + " in " + failingUrl + ", desc: " + description);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
System.out.println("HI");
return super.shouldOverrideUrlLoading(view, url);
}
});
proxyingMessageHandler = new ProxyingMessageHandler(activity, handler, token);
webView.addJavascriptInterface(proxyingMessageHandler, "androidMessageHandler");
// webView.loadUrl("file:///android_asset/channel.html");
try {
InputStream is = activity.getAssets().open("channel.html");
StringBuilder builder = new StringBuilder();
byte[] buffer = new byte[1024];
while (is.read(buffer) != -1) {
builder.append(new String(buffer));
}
is.close();
String str = builder.toString();
webView.loadDataWithBaseURL("http://192.168.5.86:8080", str, "text/html", "utf-8", null);
} catch (Exception e) {
e.printStackTrace();
}
}
/** Close the connection to the AppEngine channel. */
public void close() {
if (webView == null) {
return;
}
proxyingMessageHandler.disconnect();
webView.removeJavascriptInterface("androidMessageHandler");
webView.loadUrl("about:blank");
webView = null;
}
// Helper class for proxying callbacks from the Java<->JS interaction
// (private, background) thread to the Activity's UI thread.
private static class ProxyingMessageHandler {
private final Activity activity;
private final MessageHandler handler;
private final boolean[] disconnected = { false };
private final String token;
public ProxyingMessageHandler(Activity activity, MessageHandler handler, String token) {
this.activity = activity;
this.handler = handler;
this.token = token;
}
public void disconnect() {
disconnected[0] = true;
}
private boolean disconnected() {
return disconnected[0];
}
@JavascriptInterface
public String getToken() {
return token;
}
@JavascriptInterface
public void onOpen() {
System.out.println("GAEClient : Open" );
activity.runOnUiThread(new Runnable() {
public void run() {
if (!disconnected()) {
handler.onOpen();
}
}
});
}
@JavascriptInterface
public void onMessage(final String data) {
System.out.println("GAEClient : Message : " +data );
activity.runOnUiThread(new Runnable() {
public void run() {
if (!disconnected()) {
handler.onMessage(data);
}
}
});
}
@JavascriptInterface
public void onClose() {
System.out.println("GAEClient : Close" );
activity.runOnUiThread(new Runnable() {
public void run() {
if (!disconnected()) {
handler.onClose();
}
}
});
}
@JavascriptInterface
public void onError(final int code, final String description) {
System.out.println("GAEClient : Erroe : " + description);
activity.runOnUiThread(new Runnable() {
public void run() {
if (!disconnected()) {
handler.onError(code, description);
}
}
});
}
}
}
资产文件夹中的Channel.html
<html>
<head>
<script src="http://192.168.5.86:8080/_ah/channel/jsapi"></script>
</head>
<!--
Helper HTML that redirects Google AppEngine's Channel API to a JS object named
|androidMessageHandler|, which is expected to be injected into the WebView
rendering this page by an Android app's class such as AppRTCClient.
-->
<body onbeforeunload="closeSocket()" onload="openSocket()">
<script type="text/javascript">
var token = androidMessageHandler.getToken();
if (!token)
throw "Missing/malformed token parameter: [" + token + "]";
var channel = null;
var socket = null;
function openSocket() {
channel = new goog.appengine.Channel(token);
socket = channel.open({
'onopen': function() { androidMessageHandler.onOpen(); },
'onmessage': function(msg) { androidMessageHandler.onMessage(msg.data); },
'onclose': function() { androidMessageHandler.onClose(); },
'onerror': function(err) { androidMessageHandler.onError(err.code, err.description); }
});
}
function closeSocket() {
socket.close();
}
</script>
</body>
</html>