共用方式為

快速入門：加入會議室通話

  • 發行項

必要條件

取得使用者存取權杖

如果您已遵循此頁面的 [設定會議室參與者] 區段，建立使用者並新增作為會議室中的參與者，則可直接使用這些使用者加入會議室。

否則，您必須建立每個通話參與者的使用者存取權杖。 了解如何建立和管理使用者存取權杖。 您也可以使用 Azure CLI，並以您的連接字串執行下列命令以建立使用者和存取權杖。 建立使用者之後，您必須先將這些使用者作為參與者新增至會議室，才能加入會議室。

az communication identity token issue --scope voip --connection-string "yourConnectionString"

如需詳細資訊，請參閱使用 Azure CLI 建立和管理存取權杖。

注意

您可以使用 Azure 通訊服務 UI 程式庫來存取會議室。 UI 程式庫可讓開發人員只使用幾行程式碼，將已啟用會議室的呼叫用戶端新增至其應用程式中。

加入會議室通話

若要遵循本快速入門，您可在 GitHub 上下載會議室通話快速入門。

必要條件

  • 您必須有 Node.js 18。 您可使用 msi 安裝程式進行安裝。

設定

建立新的 Node.js 應用程式

開啟您的終端機或命令視窗，為您的應用程式建立新的目錄，並瀏覽至該目錄。

mkdir calling-rooms-quickstart && cd calling-rooms-quickstart

執行 npm init -y 以使用預設設定建立 package.json 檔案。

npm init -y

Install the package

使用 npm install 命令，以安裝適用於 JavaScript 的 Azure 通訊服務通話 SDK。

重要

本快速入門會使用 Azure 通訊服務通話 SDK 版本 1.14.1。 網頁瀏覽器的通話 JavaScript SDK 1.13.1版或更新版本提供加入會議室通話和顯示通話參與者角色的功能。

npm install @azure/communication-common --save
npm install @azure/communication-calling@1.14.1 --save

設定應用程式架構

本快速入門會使用 webpack 來組合應用程式資產。 執行下列命令以安裝 webpack、webpack-cli 和 webpack-dev-server npm 套件，並將其列為 package.json 中的開發相依性：

npm install copy-webpack-plugin@^11.0.0 webpack@^5.88.2 webpack-cli@^5.1.4 webpack-dev-server@^4.15.1 --save-dev

程式碼如下：

在專案的根目錄中建立 index.html 檔案。 我們將使用此檔案來設定基本配置，讓使用者能夠加入會議室通話。

<!-- index.html-->
<!DOCTYPE html>
<html>
    <head>
        <title>Azure Communication Services - Rooms Call Sample</title>
        <link rel="stylesheet" type="text/css" href="styles.css"/>
    </head>
    <body>
        <h4>Azure Communication Services - Rooms Call Sample</h4>
        <input id="user-access-token"
            type="text"
            placeholder="User access token"
            style="margin-bottom:1em; width: 500px;"/>
        <button id="initialize-call-agent" type="button">Initialize Call Agent</button>
        <br>
        <br>
        <input id="acs-room-id"
            type="text"
            placeholder="Enter Room Id"
            style="margin-bottom:1em; width: 500px; display: block;"/>
        <button id="join-room-call-button" type="button" disabled="true">Join Room Call</button>
        <button id="hangup-call-button" type="button" disabled="true">Hang up Call</button>
        <button id="start-video-button" type="button" disabled="true">Start Video</button>
        <button id="stop-video-button" type="button" disabled="true">Stop Video</button>
        <br>
        <br>
        <div id="connectedLabel" style="color: #13bb13;" hidden>Room Call is connected!</div>
        <br>
        <div id="remoteVideosGallery" style="width: 40%;" hidden>Remote participants' video streams:</div>
        <br>
        <div id="localVideoContainer" style="width: 30%;" hidden>Local video stream:</div>
        <!-- points to the bundle generated from client.js -->
        <script src="./main.js"></script>
    </body>
</html>

在 index.js 專案的根目錄中建立檔案，以包含本快速入門的應用程式邏輯。 將下列程式碼新增至 index.js：

// Make sure to install the necessary dependencies
const { CallClient, VideoStreamRenderer, LocalVideoStream } = require('@azure/communication-calling');
const { AzureCommunicationTokenCredential } = require('@azure/communication-common');
const { AzureLogger, setLogLevel } = require("@azure/logger");
// Set the log level and output
setLogLevel('verbose');
AzureLogger.log = (...args) => {
    console.log(...args);
};

// Calling web sdk objects
let callAgent;
let deviceManager;
let call;
let localVideoStream;
let localVideoStreamRenderer;

// UI widgets
let userAccessToken = document.getElementById('user-access-token');
let acsRoomId = document.getElementById('acs-room-id');
let initializeCallAgentButton = document.getElementById('initialize-call-agent');
let startCallButton = document.getElementById('join-room-call-button');
let hangUpCallButton = document.getElementById('hangup-call-button');
let startVideoButton = document.getElementById('start-video-button');
let stopVideoButton = document.getElementById('stop-video-button');
let connectedLabel = document.getElementById('connectedLabel');
let remoteVideosGallery = document.getElementById('remoteVideosGallery');
let localVideoContainer = document.getElementById('localVideoContainer');

/**
 * Using the CallClient, initialize a CallAgent instance with a CommunicationUserCredential which enable us to join a rooms call. 
 */
initializeCallAgentButton.onclick = async () => {
    try {
        const callClient = new CallClient(); 
        tokenCredential = new AzureCommunicationTokenCredential(userAccessToken.value.trim());
        callAgent = await callClient.createCallAgent(tokenCredential)
        // Set up a camera device to use.
        deviceManager = await callClient.getDeviceManager();
        await deviceManager.askDevicePermission({ video: true });
        await deviceManager.askDevicePermission({ audio: true });
        
        startCallButton.disabled = false;
        initializeCallAgentButton.disabled = true;
    } catch(error) {
        console.error(error);
    }
}


startCallButton.onclick = async () => {
    try {
        const localVideoStream = await createLocalVideoStream();
        const videoOptions = localVideoStream ? { localVideoStreams: [localVideoStream] } : undefined;
                
        const roomCallLocator = { roomId: acsRoomId.value.trim() };
        call = callAgent.join(roomCallLocator, { videoOptions });

        // Subscribe to the call's properties and events.
        subscribeToCall(call);
    } catch (error) {
        console.error(error);
    }
}

/**
 * Subscribe to a call obj.
 * Listen for property changes and collection updates.
 */
subscribeToCall = (call) => {
    try {
        // Inspect the initial call.id value.
        console.log(`Call Id: ${call.id}`);
        //Subscribe to call's 'idChanged' event for value changes.
        call.on('idChanged', () => {
            console.log(`Call Id changed: ${call.id}`); 
        });

        // Inspect the initial call.state value.
        console.log(`Call state: ${call.state}`);
        // Subscribe to call's 'stateChanged' event for value changes.
        call.on('stateChanged', async () => {
            console.log(`Call state changed: ${call.state}`);
            if(call.state === 'Connected') {
                connectedLabel.hidden = false;
                startCallButton.disabled = true;
                hangUpCallButton.disabled = false;
                startVideoButton.disabled = false;
                stopVideoButton.disabled = false;
                remoteVideosGallery.hidden = false;
            } else if (call.state === 'Disconnected') {
                connectedLabel.hidden = true;
                startCallButton.disabled = false;
                hangUpCallButton.disabled = true;
                startVideoButton.disabled = true;
                stopVideoButton.disabled = true;
                remoteVideosGallery.hidden = true;
                console.log(`Call ended, call end reason={code=${call.callEndReason.code}, subCode=${call.callEndReason.subCode}}`);
            }   
        });
        call.on('isLocalVideoStartedChanged', () => {
            console.log(`isLocalVideoStarted changed: ${call.isLocalVideoStarted}`);
        });
        console.log(`isLocalVideoStarted: ${call.isLocalVideoStarted}`);
        call.localVideoStreams.forEach(async (lvs) => {
            localVideoStream = lvs;
            await displayLocalVideoStream();
        });
        call.on('localVideoStreamsUpdated', e => {
            e.added.forEach(async (lvs) => {
                localVideoStream = lvs;
                await displayLocalVideoStream();
            });
            e.removed.forEach(lvs => {
               removeLocalVideoStream();
            });
        });
        
        // Inspect the call's current remote participants and subscribe to them.
        call.remoteParticipants.forEach(remoteParticipant => {
            subscribeToRemoteParticipant(remoteParticipant);
        });
        // Subscribe to the call's 'remoteParticipantsUpdated' event to be
        // notified when new participants are added to the call or removed from the call.
        call.on('remoteParticipantsUpdated', e => {
            // Subscribe to new remote participants that are added to the call.
            e.added.forEach(remoteParticipant => {
                subscribeToRemoteParticipant(remoteParticipant)
            });
            // Unsubscribe from participants that are removed from the call
            e.removed.forEach(remoteParticipant => {
                console.log('Remote participant removed from the call.');
            });
        });
    } catch (error) {
        console.error(error);
    }
}

/**
 * Subscribe to a remote participant obj.
 * Listen for property changes and collection updates.
 */
subscribeToRemoteParticipant = (remoteParticipant) => {
    try {
        // Inspect the initial remoteParticipant.state value.
        console.log(`Remote participant state: ${remoteParticipant.state}`);
        // Subscribe to remoteParticipant's 'stateChanged' event for value changes.
        remoteParticipant.on('stateChanged', () => {
            console.log(`Remote participant state changed: ${remoteParticipant.state}`);
        });

        // Inspect the remoteParticipants's current videoStreams and subscribe to them.
        remoteParticipant.videoStreams.forEach(remoteVideoStream => {
            subscribeToRemoteVideoStream(remoteVideoStream)
        });
        // Subscribe to the remoteParticipant's 'videoStreamsUpdated' event to be
        // notified when the remoteParticipant adds new videoStreams and removes video streams.
        remoteParticipant.on('videoStreamsUpdated', e => {
            // Subscribe to new remote participant's video streams that were added.
            e.added.forEach(remoteVideoStream => {
                subscribeToRemoteVideoStream(remoteVideoStream)
            });
            // Unsubscribe from remote participant's video streams that were removed.
            e.removed.forEach(remoteVideoStream => {
                console.log('Remote participant video stream was removed.');
            })
        });
    } catch (error) {
        console.error(error);
    }
}

/**
 * Subscribe to a remote participant's remote video stream obj.
 * You have to subscribe to the 'isAvailableChanged' event to render the remoteVideoStream. If the 'isAvailable' property
 * changes to 'true', a remote participant is sending a stream. Whenever availability of a remote stream changes
 * you can choose to destroy the whole 'Renderer', a specific 'RendererView' or keep them, but this will result in displaying blank video frame.
 */
subscribeToRemoteVideoStream = async (remoteVideoStream) => {
    let renderer = new VideoStreamRenderer(remoteVideoStream);
    let view;
    let remoteVideoContainer = document.createElement('div');
    remoteVideoContainer.className = 'remote-video-container';

    const createView = async () => {
        // Create a renderer view for the remote video stream.
        view = await renderer.createView();
        // Attach the renderer view to the UI.
        remoteVideoContainer.appendChild(view.target);
        remoteVideosGallery.appendChild(remoteVideoContainer);
    }

    // Remote participant has switched video on/off
    remoteVideoStream.on('isAvailableChanged', async () => {
        try {
            if (remoteVideoStream.isAvailable) {
                await createView();
            } else {
                view.dispose();
                remoteVideosGallery.removeChild(remoteVideoContainer);
            }
        } catch (e) {
            console.error(e);
        }
    });

    // Remote participant has video on initially.
    if (remoteVideoStream.isAvailable) {
        try {
            await createView();
        } catch (e) {
            console.error(e);
        }
    }
}

/**
 * Start your local video stream.
 * This will send your local video stream to remote participants so they can view it.
 */
startVideoButton.onclick = async () => {
    try {
        const localVideoStream = await createLocalVideoStream();
        await call.startVideo(localVideoStream);
    } catch (error) {
        console.error(error);
    }
}

/**
 * Stop your local video stream.
 * This will stop your local video stream from being sent to remote participants.
 */
stopVideoButton.onclick = async () => {
    try {
        await call.stopVideo(localVideoStream);
    } catch (error) {
        console.error(error);
    }
}

/**
 * To render a LocalVideoStream, you need to create a new instance of VideoStreamRenderer, and then
 * create a new VideoStreamRendererView instance using the asynchronous createView() method.
 * You may then attach view.target to any UI element. 
 */
createLocalVideoStream = async () => {
    const camera = (await deviceManager.getCameras())[0];
    if (camera) {
        return new LocalVideoStream(camera);
    } else {
        console.error(`No camera device found on the system`);
    }
}

/**
 * Display your local video stream preview in your UI
 */
displayLocalVideoStream = async () => {
    try {
        localVideoStreamRenderer = new VideoStreamRenderer(localVideoStream);
        const view = await localVideoStreamRenderer.createView();
        localVideoContainer.hidden = false;
        localVideoContainer.appendChild(view.target);
    } catch (error) {
        console.error(error);
    } 
}

/**
 * Remove your local video stream preview from your UI
 */
removeLocalVideoStream = async() => {
    try {
        localVideoStreamRenderer.dispose();
        localVideoContainer.hidden = true;
    } catch (error) {
        console.error(error);
    } 
}

/**
 * End current room call
 */
hangUpCallButton.addEventListener("click", async () => {
    await call.hangUp();
});

新增 Webpack 本地伺服器程式代碼

在 webpack.config.js 專案的根目錄中建立檔案，以包含此快速入門的本機伺服器邏輯。 將下列程式碼新增至 webpack.config.js：

const path = require('path');
const CopyPlugin = require("copy-webpack-plugin");

module.exports = {
    mode: 'development',
    entry: './index.js',
    output: {
        filename: 'main.js',
        path: path.resolve(__dirname, 'dist'),
    },
    devServer: {
        static: {
            directory: path.join(__dirname, './')
        },
    },
    plugins: [
        new CopyPlugin({
            patterns: [
                './index.html'
            ]
        }),
    ]
};

執行程式碼

使用 webpack-dev-server 來建置並執行您的應用程式。 執行下列命令，在本機 Web 伺服器上組合應用程式主機：

`npx webpack serve --config webpack.config.js`
  1. 開啟瀏覽器，瀏覽至 http://localhost:8080/.
  2. 在第一個輸入欄位上，輸入有效使用者存取權杖。
  3. 按一下 [初始化通話代理程式] 並輸入會議室識別碼。
  4. 按一下 [加入會議室通話]

您現在已成功加入會議室通話！

了解加入會議室通話

快速入門應用程式中新增的所有程式碼可讓您成功啟動並加入會議室通話。 以下是您可存取會議室更多方法/處理常式的詳細資訊，以將功能延伸至應用程式。

若要顯示本機或遠端通話參與者的角色，請訂閱下列處理常式。

// Subscribe to changes for your role in a call
 const callRoleChangedHandler = () => {
 	console.log(call.role);
 };

 call.on('roleChanged', callRoleChangedHandler);

// Subscribe to role changes for remote participants
 const subscribeToRemoteParticipant = (remoteParticipant) => {
 	remoteParticipant.on('roleChanged', () => {
 	    console.log(remoteParticipant.role);
 	});
 }

您可在會議室概念文件中深入了解會議室通話參與者的角色。

加入會議室通話

若要遵循本快速入門，您可在 GitHub 下載會議室通話快速入門。

設定

建立 XCode 專案

在 Xcode 中，建立新的 iOS 專案，並選取 [單一檢視應用程式] 範本。 此教學課程使用 SwiftUI 架構 \(英文\)，因此，您應將 [語言] 設定為 [Swift]，並將 [使用者介面] 設定為 [SwiftUI]。

螢幕擷取畫面：顯示 Xcode 內的 [新增專案] 視窗。

安裝 CocoaPods

使用此指南，在 Mac 上安裝 CocoaPods \(英文\)。

使用 CocoaPods 安裝套件和相依性

  1. 若要為您的應用程式建立Podfile，請開啟終端機並流覽至專案資料夾並執行 pod init。

  2. 將下列程式碼新增至 Podfile 並儲存：

platform :ios, '13.0'
use_frameworks!

target 'roomsquickstart' do
  pod 'AzureCommunicationCalling', '~> 2.5.0'
end

  1. 執行 pod install。

  2. .xcworkspace使用 Xcode 開啟檔案。

要求存取麥克風和相機的權限

若要存取裝置的麥克風和相機，您必須使用 NSMicrophoneUsageDescription 和 NSCameraUsageDescription來更新您 app 的資訊屬性清單。 將相關聯的值設定為字串，此字串將包含在系統用來要求使用者存取的對話框中。

以滑鼠右鍵按一下專案樹狀結構的 Info.plist 項目，然後依序選取 [開啟形式] > [原始程式碼]。 將以下幾行新增至最上層 <dict> 區段中，然後儲存檔案。

<key>NSMicrophoneUsageDescription</key>
<string>Need microphone access for VOIP calling.</string>
<key>NSCameraUsageDescription</key>
<string>Need camera access for video calling</string>

設定應用程式架構

開啟專案的 ContentView.swift 檔案，並將匯入宣告新增至檔案頂端，以匯入 AzureCommunicationCalling 程式庫和 AVFoundation。 AVFoundation 可用於從程式碼擷取音訊權限。

import AzureCommunicationCalling
import AVFoundation

物件模型

下列類別和介面會處理適用於 iOS 的 Azure 通訊服務通話 SDK 的一些主要功能。

名稱 描述
CallClient CallClient 是通話 SDK 的主要進入點。
CallAgent CallAgent 是用來啟動和管理通話。
CommunicationTokenCredential CommunicationTokenCredential 可作為用來具現化 CallAgent 的權杖認證。
CommunicationIdentifier CommunicationIdentifier 用來代表使用者的身分識別，而且可以有下列其中一個值：CommunicationUserIdentifier/PhoneNumberIdentifier/CallingApplication。
RoomCallLocator CallAgent 使用 RoomCallLocator 以加入會議室通話

建立通話代理程式

使用一些簡單的 UI 控制項來取代 ContentView 結構的實作，讓使用者可以起始和結束通話。 在本快速入門中，我們將商業規則附加至這些控件。

struct ContentView: View {    
    @State var roomId: String = ""
    @State var callObserver:CallObserver?
    @State var previewRenderer: VideoStreamRenderer? = nil
    @State var previewView: RendererView? = nil
    @State var sendingLocalVideo: Bool = false
    @State var speakerEnabled: Bool = false
    @State var muted: Bool = false
    @State var callClient: CallClient?
    @State var call: Call?
    @State var callHandler: CallHandler?
    @State var callAgent: CallAgent?
    @State var deviceManager: DeviceManager?
    @State var localVideoStreams: [LocalVideoStream]?
    @State var callState: String = "Unknown"
    @State var showAlert: Bool = false
    @State var alertMessage: String = ""
    @State var participants: [[Participant]] = [[]]
    
    var body: some View {
        NavigationView {
            ZStack {
                if (call == nil) {
                    Form {
                        Section {
                            TextField("Room ID", text: $roomId)
                            Button(action: joinRoomCall) {
                                Text("Join Room Call")
                            }
                        }
                    }
                    .navigationBarTitle("Rooms Quickstart")
                } else {
                    ZStack {
                        VStack {
                            ForEach(participants, id:\.self) { array in
                                HStack {
                                    ForEach(array, id:\.self) { participant in
                                        ParticipantView(self, participant)
                                    }
                                }
                                .frame(maxWidth: .infinity, maxHeight: 200, alignment: .topLeading)
                            }
                        }
                        .background(Color.black)
                        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
                        VStack {
                            if (sendingLocalVideo) {
                                HStack {
                                    RenderInboundVideoView(view: $previewView)
                                        .frame(width:90, height:160)
                                        .padding(10)
                                        .background(Color.green)
                                }
                                .frame(maxWidth: .infinity, alignment: .trailing)
                            }
                            HStack {
                                Button(action: toggleMute) {
                                    HStack {
                                        Text(muted ? "Unmute" : "Mute")
                                    }
                                    .frame(width:80)
                                    .padding(.vertical, 10)
                                    .background(Color(.lightGray))
                                }
                                Button(action: toggleLocalVideo) {
                                    HStack {
                                        Text(sendingLocalVideo ? "Video-Off" : "Video-On")
                                    }
                                    .frame(width:80)
                                    .padding(.vertical, 10)
                                    .background(Color(.lightGray))
                                }
                            }
                            .frame(maxWidth: .infinity, alignment: .leading)
                            .padding(.horizontal, 10)
                            .padding(.vertical, 5)
                            HStack {
                                Button(action: leaveRoomCall) {
                                    HStack {
                                        Text("Leave Room Call")
                                    }
                                    .frame(width:80)
                                    .padding(.vertical, 10)
                                    .background(Color(.red))
                                }
                            }
                            .frame(maxWidth: .infinity, alignment: .leading)
                            .padding(.horizontal, 10)
                            .padding(.vertical, 5)
                            HStack {
                                Text("Status:")
                                Text(callState)
                            }
                            .padding(.vertical, 10)
                        }
                        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .bottomLeading)
                    }
                }
            }
        }
        .onAppear{
            // Authenticate the client
            // Initialize the CallAgent and access Device Manager
            // Ask for permissions
        }
    }
}

//Functions and Observers

struct HomePageView_Previews: PreviewProvider {
    static var previews: some View {
        HomePageView()
    }
}

驗證用戶端

為了初始化 CallAgent 實例，我們需要一個使用者存取令牌，這可讓我們加入會議室通話。

擁有令牌之後，請將下列程式代碼新增至 中的ContentView.swift回onAppear呼。 您必須將 取代 <USER ACCESS TOKEN> 為資源的有效使用者存取權杖：

var userCredential: CommunicationTokenCredential?
do {
    userCredential = try CommunicationTokenCredential(token: "<USER ACCESS TOKEN>")
} catch {
    print("ERROR: It was not possible to create user credential.")
    return
}

初始化 CallAgent 並存取裝置管理員

若要從 CallClient 建立 CallAgent 執行個體，請使用 callClient.createCallAgent 方法，在初始化後非同步傳回 CallAgent 物件。 DeviceManager 讓您能夠列舉可於通話中用來傳輸音訊/視訊串流的本機裝置。 這也可讓您向使用者要求權限以存取麥克風/相機。

self.callClient = CallClient()
self.callClient?.createCallAgent(userCredential: userCredential!) { (agent, error) in
    if error != nil {
        print("ERROR: It was not possible to create a call agent.")
        return
    } else {
        self.callAgent = agent
        print("Call agent successfully created.")
        self.callAgent!.delegate = callHandler
        self.callClient?.getDeviceManager { (deviceManager, error) in
            if (error == nil) {
                print("Got device manager instance")
                self.deviceManager = deviceManager
            } else {
                print("Failed to get device manager instance")
            }
        }
    }
}

要求權限

我們需要將下列程式碼新增至 onAppear 回呼以要求音訊和視訊的權限。

AVAudioSession.sharedInstance().requestRecordPermission { (granted) in
    if granted {
        AVCaptureDevice.requestAccess(for: .video) { (videoGranted) in
            /* NO OPERATION */
        }
    }
}

加入會議室通話

joinRoomCall 方法會設定為點選 [加入會議室通話] 按鈕時要執行的動作。 在本快速入門中，通話預設為音訊，但加入會議室後可以啟用視訊。

func joinRoomCall() {
    if self.callAgent == nil {
        print("CallAgent not initialized")
        return
    }
    
    if (self.roomId.isEmpty) {
        print("Room ID not set")
        return
    }
    
    // Join a call with a Room ID
    let options = JoinCallOptions()
    let audioOptions = AudioOptions()
    audioOptions.muted = self.muted
    
    options.audioOptions = audioOptions
    
    let roomCallLocator = RoomCallLocator(roomId: roomId)
    self.callAgent!.join(with: roomCallLocator, joinCallOptions: options) { (call, error) in
        self.setCallAndObserver(call: call, error: error)
    }
}

CallObserver 可用於管理通話時的事件和遠端參與者。 我們將在 setCallAndObserver 函式中設定觀察者。

func setCallAndObserver(call:Call!, error:Error?) {
    if (error == nil) {
        self.call = call
        self.callObserver = CallObserver(view:self)

        self.call!.delegate = self.callObserver

        if (self.call!.state == CallState.connected) {
            self.callObserver!.handleInitialCallState(call: call)
        }
    } else {
        print("Failed to get call object")
    }
}

離開會議室通話

leaveRoomCall 方法會設定為點選 [離開會議室通話] 按鈕時要執行的動作。 這將處理離開通話並清除任何已建立的資源。

private func leaveRoomCall() {
    if (self.sendingLocalVideo) {
        self.call!.stopVideo(stream: self.localVideoStreams!.first!) { (error) in
            if (error != nil) {
                print("Failed to stop video")
            } else {
                self.sendingLocalVideo = false
                self.previewView = nil
                self.previewRenderer?.dispose()
                self.previewRenderer = nil
            }
        }
    }
    self.call?.hangUp(options: nil) { (error) in }
    self.participants.removeAll()
    self.call?.delegate = nil
    self.call = nil
}

廣播視訊

在會議室通話期間，我們可以使用 startVideo 或 stopVideo 來啟動或停止傳送 LocalVideoStream 給遠端參與者。

func toggleLocalVideo() {
    if (self.sendingLocalVideo) {
        self.call!.stopVideo(stream: self.localVideoStreams!.first!) { (error) in
            if (error != nil) {
                print("Cannot stop video")
            } else {
                self.sendingLocalVideo = false
                self.previewView = nil
                self.previewRenderer!.dispose()
                self.previewRenderer = nil
            }
        }
    } else {
        let availableCameras = self.deviceManager!.cameras
        let scalingMode:ScalingMode = .crop
        if (self.localVideoStreams == nil) {
            self.localVideoStreams = [LocalVideoStream]()
        }
        self.localVideoStreams!.append(LocalVideoStream(camera: availableCameras.first!))
        self.previewRenderer = try! VideoStreamRenderer(localVideoStream: self.localVideoStreams!.first!)
        self.previewView = try! previewRenderer!.createView(withOptions: CreateViewOptions(scalingMode:scalingMode))
        self.call!.startVideo(stream: self.localVideoStreams!.first!) { (error) in
            if (error != nil) {
                print("Cannot start video")
            }
            else {
                self.sendingLocalVideo = true
            }
        }
    }
}

靜音本機音訊

在會議室通話期間，我們可使用 mute 或 unMute 以靜音或取消靜音麥克風。

func toggleMute() {
    if (self.muted) {
        call!.unmuteOutgoingAudio(completionHandler: { (error) in
            if error == nil {
                self.muted = false
            }
        })
    } else {
        call!.muteOutgoingAudio(completionHandler: { (error) in
            if error == nil {
                self.muted = true
            }
        })
    }
}

處理通話更新

若要處理通話更新，請實作 CallHandler 以處理更新事件。 將下列實作放在 CallHandler.swift 中。

final class CallHandler: NSObject, CallAgentDelegate {
    public var owner: ContentView?

    private static var instance: CallHandler?
    static func getOrCreateInstance() -> CallHandler {
        if let c = instance {
            return c
        }
        instance = CallHandler()
        return instance!
    }

    private override init() {}
    
    public func callAgent(_ callAgent: CallAgent, didUpdateCalls args: CallsUpdatedEventArgs) {
        if let removedCall = args.removedCalls.first {
            owner?.call = nil
        }
    }
}

我們需要將下列程式碼新增至 ContentView.swift 中的 onAppear 回呼，以建立 CallHandler 的執行個體：

self.callHandler = CallHandler.getOrCreateInstance()
self.callHandler.owner = self

成功建立 CallAgent 後，將委派設定為 CallAgent：

self.callAgent!.delegate = callHandler

遠端參與者管理

在通話執行個體上，所有遠端參與者均以 RemoteParticipant 型別表示，且可透過 remoteParticipants 集合取得。 我們可以實作 類別 Participant ，以管理遠端參與者遠端視訊串流上的更新等等。

class Participant: NSObject, RemoteParticipantDelegate, ObservableObject {
    private var videoStreamCount = 0
    private let innerParticipant:RemoteParticipant
    private let call:Call
    private var renderedRemoteVideoStream:RemoteVideoStream?
    
    @Published var state:ParticipantState = ParticipantState.disconnected
    @Published var isMuted:Bool = false
    @Published var isSpeaking:Bool = false
    @Published var hasVideo:Bool = false
    @Published var displayName:String = ""
    @Published var videoOn:Bool = true
    @Published var renderer:VideoStreamRenderer? = nil
    @Published var rendererView:RendererView? = nil
    @Published var scalingMode: ScalingMode = .fit

    init(_ call: Call, _ innerParticipant: RemoteParticipant) {
        self.call = call
        self.innerParticipant = innerParticipant
        self.displayName = innerParticipant.displayName

        super.init()

        self.innerParticipant.delegate = self

        self.state = innerParticipant.state
        self.isMuted = innerParticipant.isMuted
        self.isSpeaking = innerParticipant.isSpeaking
        self.hasVideo = innerParticipant.videoStreams.count > 0
        if(self.hasVideo) {
            handleInitialRemoteVideo()
        }
    }

    deinit {
        self.innerParticipant.delegate = nil
    }

    func getMri() -> String {
        Utilities.toMri(innerParticipant.identifier)
    }

    func set(scalingMode: ScalingMode) {
        if self.rendererView != nil {
            self.rendererView!.update(scalingMode: scalingMode)
        }
        self.scalingMode = scalingMode
    }
    
    func handleInitialRemoteVideo() {
        renderedRemoteVideoStream = innerParticipant.videoStreams[0]
        renderer = try! VideoStreamRenderer(remoteVideoStream: renderedRemoteVideoStream!)
        rendererView = try! renderer!.createView()
    }

    func toggleVideo() {
        if videoOn {
            rendererView = nil
            renderer?.dispose()
            videoOn = false
        }
        else {
            renderer = try! VideoStreamRenderer(remoteVideoStream: innerParticipant.videoStreams[0])
            rendererView = try! renderer!.createView()
            videoOn = true
        }
    }

    func remoteParticipant(_ remoteParticipant: RemoteParticipant, didUpdateVideoStreams args: RemoteVideoStreamsEventArgs) {
        let hadVideo = hasVideo
        hasVideo = innerParticipant.videoStreams.count > 0
        if videoOn {
            if hadVideo && !hasVideo {
                // Remote user stopped sharing
                rendererView = nil
                renderer?.dispose()
            } else if hasVideo && !hadVideo {
                // remote user started sharing
                renderedRemoteVideoStream = innerParticipant.videoStreams[0]
                renderer = try! VideoStreamRenderer(remoteVideoStream: renderedRemoteVideoStream!)
                rendererView = try! renderer!.createView()
            } else if hadVideo && hasVideo {
                if args.addedRemoteVideoStreams.count > 0 {
                    if renderedRemoteVideoStream?.id == args.addedRemoteVideoStreams[0].id {
                        return
                    }
    
                    // remote user added a second video, so switch to the latest one
                    guard let rendererTemp = renderer else {
                        return
                    }
                    rendererTemp.dispose()
                    renderedRemoteVideoStream = args.addedRemoteVideoStreams[0]
                    renderer = try! VideoStreamRenderer(remoteVideoStream: renderedRemoteVideoStream!)
                    rendererView = try! renderer!.createView()
                } else if args.removedRemoteVideoStreams.count > 0 {
                    if args.removedRemoteVideoStreams[0].id == renderedRemoteVideoStream!.id {
                        // remote user stopped sharing video that we were rendering but is sharing
                        // another video that we can render
                        renderer!.dispose()

                        renderedRemoteVideoStream = innerParticipant.videoStreams[0]
                        renderer = try! VideoStreamRenderer(remoteVideoStream: renderedRemoteVideoStream!)
                        rendererView = try! renderer!.createView()
                    }
                }
            }
        }
    }

    func remoteParticipant(_ remoteParticipant: RemoteParticipant, didChangeDisplayName args: PropertyChangedEventArgs) {
        self.displayName = innerParticipant.displayName
    }
}

class Utilities {
    @available(*, unavailable) private init() {}

    public static func toMri(_ id: CommunicationIdentifier?) -> String {

        if id is CommunicationUserIdentifier {
            let communicationUserIdentifier = id as! CommunicationUserIdentifier
            return communicationUserIdentifier.identifier
        } else {
            return "<nil>"
        }
    }
}

遠端參與者視訊串流

我們可建立 ParticipantView 以處理轉譯遠端參與者的視訊串流。 將實作放在 ParticipantView.swift 中

struct ParticipantView : View, Hashable {
    static func == (lhs: ParticipantView, rhs: ParticipantView) -> Bool {
        return lhs.participant.getMri() == rhs.participant.getMri()
    }

    private let owner: HomePageView

    @State var showPopUp: Bool = false
    @State var videoHeight = CGFloat(200)
    @ObservedObject private var participant:Participant

    var body: some View {
        ZStack {
            if (participant.rendererView != nil) {
                HStack {
                    RenderInboundVideoView(view: $participant.rendererView)
                }
                .background(Color(.black))
                .frame(height: videoHeight)
                .animation(Animation.default)
            } else {
                HStack {
                    Text("No incoming video")
                }
                .background(Color(.red))
                .frame(height: videoHeight)
            }
        }
    }

    func hash(into hasher: inout Hasher) {
        hasher.combine(participant.getMri())
    }

    init(_ owner: HomePageView, _ participant: Participant) {
        self.owner = owner
        self.participant = participant
    }

    func resizeVideo() {
        videoHeight = videoHeight == 200 ? 150 : 200
    }

    func showAlert(_ title: String, _ message: String) {
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
            self.owner.alertMessage = message
            self.owner.showAlert = true
        }
    }
}

struct RenderInboundVideoView: UIViewRepresentable {
    @Binding var view:RendererView!

    func makeUIView(context: Context) -> UIView {
        return UIView()
    }

    func updateUIView(_ uiView: UIView, context: Context) {
        for view in uiView.subviews {
            view.removeFromSuperview()
        }
        if (view != nil) {
            uiView.addSubview(view)
        }
    }
}

訂閱事件

我們可實作 CallObserver 類別以訂閱事件集合，在通話期間 remoteParticipants 等值變更時傳送通知。

public class CallObserver : NSObject, CallDelegate
{
    private var owner: ContentView
    private var firstTimeCallConnected: Bool = true
    
    init(view: ContentView) {
        owner = view
        super.init()
    }

    public func call(_ call: Call, didChangeState args: PropertyChangedEventArgs) {
        let state = CallObserver.callStateToString(state:call.state)
        owner.callState = state
        if (call.state == CallState.disconnected) {
            owner.leaveRoomCall()
        }
        else if (call.state == CallState.connected) {
            if(self.firstTimeCallConnected) {
                self.handleInitialCallState(call: call);
            }
            self.firstTimeCallConnected = false;
        }
    }

    public func handleInitialCallState(call: Call) {
        // We want to build a matrix with max 2 columns

        owner.callState = CallObserver.callStateToString(state:call.state)
        var participants = [Participant]()

        // Add older/existing participants
        owner.participants.forEach { (existingParticipants: [Participant]) in
            participants.append(contentsOf: existingParticipants)
        }
        owner.participants.removeAll()

        // Add new participants to the collection
        for remoteParticipant in call.remoteParticipants {
            let mri = Utilities.toMri(remoteParticipant.identifier)
            let found = participants.contains { (participant) -> Bool in
                participant.getMri() == mri
            }

            if !found {
                let participant = Participant(call, remoteParticipant)
                participants.append(participant)
            }
        }

        // Convert 1-D array into a 2-D array with 2 columns
        var indexOfParticipant = 0
        while indexOfParticipant < participants.count {
            var newParticipants = [Participant]()
            newParticipants.append(participants[indexOfParticipant])
            indexOfParticipant += 1
            if (indexOfParticipant < participants.count) {
                newParticipants.append(participants[indexOfParticipant])
                indexOfParticipant += 1
            }
            owner.participants.append(newParticipants)
        }
    }

    public func call(_ call: Call, didUpdateRemoteParticipant args: ParticipantsUpdatedEventArgs) {
        var participants = [Participant]()
        // Add older/existing participants
        owner.participants.forEach { (existingParticipants: [Participant]) in
            participants.append(contentsOf: existingParticipants)
        }
        owner.participants.removeAll()

        // Remove deleted participants from the collection
        args.removedParticipants.forEach { p in
            let mri = Utilities.toMri(p.identifier)
            participants.removeAll { (participant) -> Bool in
                participant.getMri() == mri
            }
        }

        // Add new participants to the collection
        for remoteParticipant in args.addedParticipants {
            let mri = Utilities.toMri(remoteParticipant.identifier)
            let found = participants.contains { (view) -> Bool in
                view.getMri() == mri
            }

            if !found {
                let participant = Participant(call, remoteParticipant)
                participants.append(participant)
            }
        }

        // Convert 1-D array into a 2-D array with 2 columns
        var indexOfParticipant = 0
        while indexOfParticipant < participants.count {
            var array = [Participant]()
            array.append(participants[indexOfParticipant])
            indexOfParticipant += 1
            if (indexOfParticipant < participants.count) {
                array.append(participants[indexOfParticipant])
                indexOfParticipant += 1
            }
            owner.participants.append(array)
        }
    }

    private static func callStateToString(state:CallState) -> String {
        switch state {
        case .connected: return "Connected"
        case .connecting: return "Connecting"
        case .disconnected: return "Disconnected"
        case .disconnecting: return "Disconnecting"
        case .none: return "None"
        default: return "Unknown"
        }
    }
}

執行程式碼

您可以藉由依序選取 [產品] > [執行] 或使用 (⌘-R) 鍵盤快速鍵，在 iOS 模擬器上建置並執行應用程式。

iOS 行動通話 SDK 2.5.0 版或更新版本提供加入會議室通話和顯示通話參與者角色的功能。

您可在會議室概念文件中深入了解會議室通話參與者的角色。

範例應用程式

若要遵循本快速入門，您可在 GitHub 下載會議室通話快速入門。

設定專案

建立具有空白活動的 Android 應用程式

從 Android Studio，建立新專案：

顯示建立新 Android Studio 專案開始的螢幕快照

將專案命名為「會議室通話快速入門」並選取 [Kotlin]。

顯示 [項目設定] 畫面中新專案屬性的螢幕快照。

Install the package

在模組層級 build.gradle 中，將下列行新增至 dependencies 區段。

dependencies {
    ...
    //Ability to join a Rooms calls is available in 2.4.0 or above.
    implementation 'com.azure.android:azure-communication-calling:2.4.0'
    ...
}

將權限新增至應用程式資訊清單

若要要求進行通話所需的權限，您必須先在應用程式資訊清單 (app/src/main/AndroidManifest.xml) 中宣告權限。 將下列內容複製到資訊清單檔：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-feature
        android:name="android.hardware.camera"
        android:required="false" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.CAMERA" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.AppTheme">

        <!--Our Calling SDK depends on the Apache HTTP SDK.
    When targeting Android SDK 28+, this library needs to be explicitly referenced.
    See https://developer.android.com/about/versions/pie/android-9.0-changes-28#apache-p-->
        <uses-library android:name="org.apache.http.legacy" android:required="false"/>
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

設定應用程式的配置

您需要會議室識別碼的文字輸入、進行通話的按鈕，以及掛斷通話的額外按鈕。

移至 app/src/main/res/layout/activity_main.xml，並使用下列程式碼取代檔案內容：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/text_role"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Role:"
        android:textSize="16sp"
        android:textStyle="bold"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="16dp" />

    <TextView
        android:id="@+id/text_call_status"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Call Status"
        android:textSize="16sp"
        android:textStyle="bold"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="48dp" />

    <EditText
        android:id="@+id/room_id"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="Room ID"
        android:inputType="textPersonName"
        android:layout_marginTop="100dp"
        android:layout_marginHorizontal="20dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="260dp"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <Button
            android:id="@+id/call_button"
            android:layout_width="wrap_content"
            android:layout_marginEnd="32dp"
            android:layout_height="wrap_content"
            android:text="Start Call" />

        <Button
            android:id="@+id/hangup_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Hangup" />

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

建立主要活動

建立配置後，您可新增邏輯以開始會議室通話。 活動會處理要求執行階段權限、建立通話代理程式，並且在按下按鈕時進行通話。

onCreate 方法會叫用 getAllPermissions 和 createAgent，並新增通話按鈕的繫結。

建立活動時，此事件僅發生一次。 如需 onCreate 的詳細資訊，請參閱了解活動生命週期指南。

移至 MainActivity.kt 檔案，然後以下列程式碼取代內容：

package com.contoso.roomscallquickstart

import android.Manifest
import android.annotation.SuppressLint
import android.content.pm.PackageManager
import android.media.AudioManager
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import com.azure.android.communication.calling.Call
import com.azure.android.communication.calling.CallAgent
import com.azure.android.communication.calling.CallClient
import com.azure.android.communication.calling.HangUpOptions
import com.azure.android.communication.calling.JoinCallOptions
import com.azure.android.communication.calling.RoomCallLocator
import com.azure.android.communication.common.CommunicationTokenCredential
import java.util.concurrent.ExecutionException

class MainActivity : AppCompatActivity() {
    private val allPermissions = arrayOf(
        Manifest.permission.RECORD_AUDIO,
        Manifest.permission.CAMERA,
        Manifest.permission.READ_PHONE_STATE
    )

    private val userToken = "<ACS_USER_TOKEN>"
    private lateinit var callAgent: CallAgent
    private var call: Call? = null

    private lateinit var roleTextView: TextView
    private lateinit var statusView: TextView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        getAllPermissions()
        createCallAgent()

        val callButton: Button = findViewById(R.id.call_button)
        callButton.setOnClickListener { startCall() }

        val hangupButton: Button = findViewById(R.id.hangup_button)
        hangupButton.setOnClickListener { endCall() }

        roleTextView = findViewById(R.id.text_role)
        statusView = findViewById(R.id.text_call_status)

        volumeControlStream = AudioManager.STREAM_VOICE_CALL
    }

    /**
     * Start a call
     */
    private fun startCall() {
        if (userToken.startsWith("<")) {
            Toast.makeText(this, "Please enter token in source code", Toast.LENGTH_SHORT).show()
            return
        }

        val roomIdView: EditText = findViewById(R.id.room_id)
        val roomId = roomIdView.text.toString()
        if (roomId.isEmpty()) {
            Toast.makeText(this, "Please enter room ID", Toast.LENGTH_SHORT).show()
            return
        }

        val joinCallOptions = JoinCallOptions()

        val roomCallLocator = RoomCallLocator(roomId)
        call = callAgent.join(applicationContext, roomCallLocator, joinCallOptions)
        
        call?.addOnStateChangedListener { setCallStatus(call?.state.toString()) }

        call?.addOnRoleChangedListener { setRoleText(call?.callParticipantRole.toString()) }
    }

    /**
     * Ends the call previously started
     */
    private fun endCall() {
        try {
            call?.hangUp(HangUpOptions())?.get()
        } catch (e: ExecutionException) {
            Toast.makeText(this, "Unable to hang up call", Toast.LENGTH_SHORT).show()
        }
    }

    /**
     * Create the call callAgent
     */
    private fun createCallAgent() {
            try {
                val credential = CommunicationTokenCredential(userToken)
                callAgent = CallClient().createCallAgent(applicationContext, credential).get()
            } catch (ex: Exception) {
                Toast.makeText(
                    applicationContext,
                    "Failed to create call callAgent.",
                    Toast.LENGTH_SHORT
                ).show()
            }
    }

    /**
     * Request each required permission if the app doesn't already have it.
     */
    private fun getAllPermissions() {
        val permissionsToAskFor = mutableListOf<String>()
        for (permission in allPermissions) {
            if (ActivityCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
                permissionsToAskFor.add(permission)
            }
        }
        if (permissionsToAskFor.isNotEmpty()) {
            ActivityCompat.requestPermissions(this, permissionsToAskFor.toTypedArray(), 1)
        }
    }

    /**
     * Ensure all permissions were granted, otherwise inform the user permissions are missing.
     */
    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        var allPermissionsGranted = true
        for (result in grantResults) {
            allPermissionsGranted = allPermissionsGranted && (result == PackageManager.PERMISSION_GRANTED)
        }
        if (!allPermissionsGranted) {
            Toast.makeText(this, "All permissions are needed to make the call.", Toast.LENGTH_LONG).show()
            finish()
        }
    }

    @SuppressLint("SetTextI18n")
    private fun setCallStatus(status: String?) {
        runOnUiThread {
            statusView.text = "Call Status: $status"
        }
    }
    @SuppressLint("SetTextI18n")
    private fun setRoleText(role: String?) {
        runOnUiThread {
            roleTextView.text = "Role: $role"
        }
    }
}

注意

當您設計應用程式時，請考量何時應要求這些權限。 您應該視需要要求權限，而不是提前要求。 如需詳細資訊，請參閱 Android 權限指南。

執行專案

在執行專案前，請將 MainActivity.kt 中的 <ACS_USER_TOKEN> 取代為 Azure 通訊服務使用者存取權杖。

private val userToken = "<ACS_USER_TOKEN>"

在模擬器或實體裝置上執行專案。

您應看到輸入會議室識別碼的欄位和開始會議室通話的按鈕。 輸入會議室識別碼並確認通話狀態和角色皆已變更。

了解加入會議室通話

快速入門應用程式中新增的所有程式碼可讓您成功啟動並加入會議室通話。 我們需要深入了解運作方式及您可存取會議室的更多方法/處理常式。

藉由 CallAgent 加入會議室通話，這是以有效使用者權杖建立：

private fun createCallAgent() {
    try {
        val credential = CommunicationTokenCredential(userToken)
        callAgent = CallClient().createCallAgent(applicationContext, credential).get()
    } catch (ex: Exception) {
        Toast.makeText(
            applicationContext,
            "Failed to create call callAgent.",
            Toast.LENGTH_SHORT
        ).show()
    }
}

使用 CallAgent 和 RoomCallLocator，我們可使用傳回 Call 物件的 CallAgent.join 方法加入會議室通話：

 val joinCallOptions = JoinCallOptions()
 val roomCallLocator = RoomCallLocator(roomId)
 call = callAgent.join(applicationContext, roomCallLocator, joinCallOptions)

MainActivity.kt 檔案以外的進一步自訂包含訂閱 Call 事件以取得更新：

call.addOnRemoteParticipantsUpdatedListener { args: ParticipantsUpdatedEvent? ->
    handleRemoteParticipantsUpdate(
        args!!
    )
}

call.addOnStateChangedListener { args: PropertyChangedEvent? ->
    this.handleCallOnStateChanged(
        args!!
    )
}

您可使用下列方式和處理常式，進一步延伸 MainActivity.kt 以顯示本機或遠端通話參與者的角色。

// Get your role in the call
call.getCallParticipantRole();

// Subscribe to changes for your role in a call
private void isCallRoleChanged(PropertyChangedEvent propertyChangedEvent) {
    // handle self-role change
}

call.addOnRoleChangedListener(isCallRoleChanged);

// Subscribe to role changes for remote participants
private void isRoleChanged(PropertyChangedEvent propertyChangedEvent) {
    // handle remote participant role change
}

remoteParticipant.addOnRoleChangedListener(isRoleChanged);

// Get role of the remote participant
remoteParticipant.getCallParticipantRole();

Android 行動通話 SDK 2.4.0 版或更新版本提供加入會議室通話和顯示通話參與者角色的功能。

您可在會議室概念文件中深入了解會議室通話參與者的角色。

加入會議室通話

若要加入會議室通話，請使用將視訊通話新增至用戶端應用程式指南設定 Windows 應用程式。 或者，您可在 GitHub 下載視訊通話快速入門。

使用有效使用者權杖建立 callAgent：


var creds = new CallTokenCredential("<user-token>");

CallAgentOptions callAgentOptions = new CallAgentOptions();
callAgentOptions.DisplayName = "<display-name>";
callAgent = await callClient.CreateCallAgentAsync(creds, callAgentOptions);

使用 callAgent 和 RoomCallLocator 加入會議室通話，CallAgent.JoinAsync 方法將傳回 CommunicationCall 物件：


RoomCallLocator roomCallLocator = new RoomCallLocator('<RoomId>');

CommunicationCall communicationCall = await callAgent.JoinAsync(roomCallLocator, joinCallOptions);

訂閱 CommunicationCall 事件以取得更新：

private async void CommunicationCall_OnStateChanged(object sender, PropertyChangedEventArgs args) {
	var call = sender as CommunicationCall;
	if (sender != null)
	{
		switch (call.State){
			// Handle changes in call state
		}
	}
}

若要顯示通話參與者的角色，請訂閱角色變更：

private void RemoteParticipant_OnRoleChanged(object sender, Azure.Communication.Calling.WindowsClient.PropertyChangedEventArgs args)
{
    _ = Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        System.Diagnostics.Trace.WriteLine("Raising Role change, new Role: " + remoteParticipant_.Role);
        PropertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs("RemoteParticipantRole"));
    });
}

Windows NuGet 版本 1.1.0 版或更新版本提供加入會議室通話和顯示通話參與者角色的功能。

您可在會議室概念文件中深入了解會議室通話參與者的角色。

下一步

在此區段中，您將了解如何：

  • 將視訊通話新增至應用程式
  • 將會議室識別碼傳遞至通話 SDK
  • 從應用程式加入會議室通話

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