webrtc服务器janus android客户端编译学习三

1.首先安装 android studio软件

安装方法网上有很多，这里不详细说。

2.android studio打开项目

在目录下载源码 android 客户端源码：
https://github.com/Computician/janus-gateway-android

如果android studio中已经打开了某个项目，则在菜单的File - Open，然后在弹出的目录选择对话框中选中项目的主目录（janus-gateway-android 解压目录），点‘OK’。
如果android studio中没有已经打开的项目，则直接在欢迎对话框里选‘Open an existing android studio project’。

3.安装时确保环境变量已设置好

系统变量下找到Path这个变量
C:\Program Files\Java\jdk1.8.0_91

另外我的android studio 必须配置Jdk8以上，否则无法设置成功。

4.设置android studio JDK

必须要设置C:\Program Files\Java\jdk1.8.0_91

4.常见错误

例如这样的错误，Error:The SDK Build Tools revision (23.0.3)
一般是工程的SDK版与已下载不一致，所以可以下载需要的版本，也可以修改项目。我是直接下载了。
然后生成成功。

5.查找janus服务器IP

在当前窗口查找文本【Ctrl+F】
在当前工程内查找文本【Ctrl+Shift+F】
找到下面的内容
private final String JANUS_URI = “ws://192.168.1.197:8188”;

默认运行的是echotest插件，所以在文件EchoTest.java文件中。

把上面的IP修改成你自己搭建的janus服务器IP，怎么搭建请参考我前面的博文。这样就可以进行通信了。

只有设置好正确的 IP之后就可以看到视频，如果不修改无法运行。

输出的apk目录在项目目录\janus-gateway-android-master\janus-gateway-android-master\app\build\outputs\apk

6.测试结果

我把对应的akp安装在手机上进行测试，效果如下：

其中主要内容还是实现webrtc相关的接口函数，例EchoTest

package computician.janusclient;import android.content.Context;import android.opengl.EGLContext;import android.util.Log;import org.json.JSONObject;import org.webrtc.MediaStream;import org.webrtc.PeerConnection;import org.webrtc.VideoRenderer;import org.webrtc.VideoRendererGui;import java.util.ArrayList;import java.util.List;import computician.janusclientapi.IJanusGatewayCallbacks;import computician.janusclientapi.IJanusPluginCallbacks;import computician.janusclientapi.IPluginHandleWebRTCCallbacks;import computician.janusclientapi.JanusMediaConstraints;import computician.janusclientapi.JanusPluginHandle;import computician.janusclientapi.JanusServer;import computician.janusclientapi.JanusSupportedPluginPackages;import computician.janusclientapi.PluginHandleSendMessageCallbacks;/** * Created by ben.trent on 7/24/2015. *///TODO create message classes unique to this pluginpublic class EchoTest {    //private final String JANUS_URI = "ws://192.168.1.197:8188";    private final String JANUS_URI = "ws://39.105.105.159:8188";    //private final String JANUS_URI = "ws://140.82.15.14:8188";    private JanusPluginHandle handle = null;    private final VideoRenderer.Callbacks localRender, remoteRender;    private final JanusServer janusServer;    public class JanusGlobalCallbacks implements IJanusGatewayCallbacks {        @Override        public void onSuccess() {            janusServer.Attach(new JanusPluginCallbacks());        }        @Override        public void onDestroy() {        }        @Override        public String getServerUri() {            return JANUS_URI;        }        @Override        public List getIceServers() {            return new ArrayList();        }        @Override        public Boolean getIpv6Support() {            return Boolean.FALSE;        }        @Override        public Integer getMaxPollEvents() {            return 0;        }        @Override        public void onCallbackError(String error) {        }    }    public class JanusPluginCallbacks implements IJanusPluginCallbacks {        @Override        public void success(JanusPluginHandle pluginHandle) {            EchoTest.this.handle = pluginHandle;                JSONObject msg = new JSONObject();                JSONObject obj = new JSONObject();                try {                    obj.put("audio", true);                    obj.put("video", true);                    msg.put("message", obj);                    handle.sendMessage(new PluginHandleSendMessageCallbacks(msg));                } catch (Exception ex) {                }            handle.createOffer(new IPluginHandleWebRTCCallbacks() {                @Override                public JSONObject getJsep() {                    return null;                }                @Override                public void onCallbackError(String error) {                }                @Override                public Boolean getTrickle() {                    return true;                }                @Override                public JanusMediaConstraints getMedia() {                    return new JanusMediaConstraints();                }                @Override                public void onSuccess(JSONObject obj) {                    Log.d("JANUSCLIENT", "OnSuccess for CreateOffer called");                    try {                        JSONObject body = new JSONObject();                        JSONObject msg = new JSONObject();                        body.put("audio", true);                        body.put("video", true);                        msg.put("message", body);                        msg.put("jsep", obj);                        handle.sendMessage(new PluginHandleSendMessageCallbacks(msg));                    } catch (Exception ex) {                    }                }            });        }        @Override        public void onMessage(JSONObject msg, final JSONObject jsepLocal) {            if(jsepLocal != null)            {                handle.handleRemoteJsep(new IPluginHandleWebRTCCallbacks() {                    final JSONObject myJsep = jsepLocal;                    @Override                    public void onSuccess(JSONObject obj) {                    }                    @Override                    public JSONObject getJsep() {                        return myJsep;                    }                    @Override                    public JanusMediaConstraints getMedia() {                        return null;                    }                    @Override                    public Boolean getTrickle() {                        return Boolean.FALSE;                    }                    @Override                    public void onCallbackError(String error) {                    }                });            }        }        @Override        public void onLocalStream(MediaStream stream) {            stream.videoTracks.get(0).addRenderer(new VideoRenderer(localRender));            VideoRendererGui.update(localRender, 0, 0, 25, 25, VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, false);        }        @Override        public void onRemoteStream(MediaStream stream) {            stream.videoTracks.get(0).setEnabled(true);            if(stream.videoTracks.get(0).enabled())                Log.d("JANUSCLIENT", "video tracks enabled");            stream.videoTracks.get(0).addRenderer(new VideoRenderer(remoteRender));            VideoRendererGui.update(remoteRender, 0, 0, 25, 25, VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, true);            VideoRendererGui.update(localRender, 72, 72, 25, 25, VideoRendererGui.ScalingType.SCALE_ASPECT_FILL, false);        }        @Override        public void onDataOpen(Object data) {        }        @Override        public void onData(Object data) {        }        @Override        public void onCleanup() {        }        @Override        public JanusSupportedPluginPackages getPlugin() {            return JanusSupportedPluginPackages.JANUS_ECHO_TEST;        }        @Override        public void onCallbackError(String error) {        }        @Override        public void onDetached() {        }    }    public EchoTest(VideoRenderer.Callbacks localRender, VideoRenderer.Callbacks remoteRender) {        this.localRender = localRender;        this.remoteRender = remoteRender;        janusServer = new JanusServer(new JanusGlobalCallbacks());    }    public boolean initializeMediaContext(Context context, boolean audio, boolean video, boolean videoHwAcceleration, EGLContext eglContext){        return janusServer.initializeMediaContext(context, audio, video, videoHwAcceleration, eglContext);    }    public void Start() {        janusServer.Connect();    }    }