快速入門：將 1：1 視訊通話新增至您的應用程式
開始使用 Azure 通訊服務，方法是使用通訊服務呼叫 SDK 將 1 對 1 的視訊通話新增至您的應用程式。 您將瞭解如何使用適用於 JavaScript 的 Azure 通訊服務 呼叫 SDK 來啟動和接聽視訊通話。
範例程式碼
如果您想要直接跳到結尾，您可以在 GitHub 上下載本快速入門作為範例。
注意
您可以使用 Azure 通訊服務 UI 連結庫來存取對 Azure 通訊服務 使用者的輸出呼叫。 UI 連結庫可讓開發人員僅使用幾行程式代碼，將啟用 VoIP 的呼叫用戶端新增至其應用程式中。
必要條件
取得具有使用中訂用帳戶的 Azure 帳戶。 免費建立帳戶。
您需要Node.js 18。 您可以使用 msi 安裝程式來安裝它。
建立作用中的通訊服務資源。 建立通訊服務資源。 您必須記錄本快速入門的 連接字串。
建立使用者存取令牌來具現化呼叫用戶端。 瞭解如何建立和管理使用者存取令牌。 您也可以使用 Azure CLI，搭配您的 連接字串 執行 命令，以建立使用者和存取令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"如需詳細資訊，請參閱 使用 Azure CLI 建立和管理存取令牌。
設定
建立新的Node.js應用程式
開啟終端機或命令視窗，為您的應用程式建立新的目錄，然後流覽至該目錄。
mkdir calling-quickstart && cd calling-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
npm install使用 命令來安裝 Azure 通訊服務呼叫 SDK for JavaScript。
npm install @azure/communication-common --save
npm install @azure/communication-calling --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、 和 webpack-dev-server npm 套件，webpack-cli並將其列為開發package.json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。 我們會使用此檔案來設定基本版面配置，讓用戶能夠撥打 1：1 視訊通話。
<!-- index.html -->
<!DOCTYPE html>
<html>
<head>
<title>Azure Communication Services - Calling Web SDK</title>
<link rel="stylesheet" type="text/css" href="styles.css"/>
</head>
<body>
<h4>Azure Communication Services - Calling Web SDK</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="callee-acs-user-id"
type="text"
placeholder="Enter callee's Azure Communication Services user identity in format: '8:acs:resourceId_userId'"
style="margin-bottom:1em; width: 500px; display: block;"/>
<button id="start-call-button" type="button" disabled="true">Start Call</button>
<button id="hangup-call-button" type="button" disabled="true">Hang up Call</button>
<button id="accept-call-button" type="button" disabled="true">Accept 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>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>
下列類別和介面會處理 Azure 通訊服務 呼叫 SDK 的一些主要功能：
| 名稱 | 描述 |
|---|---|
CallClient |
呼叫 SDK 的主要進入點。 |
AzureCommunicationTokenCredential |
實作 CommunicationTokenCredential 介面，用來具現化 callAgent。 |
CallAgent |
用來啟動和管理話務。 |
DeviceManager |
用來管理媒體裝置。 |
Call |
用於表示通話 |
LocalVideoStream |
用於在本機系統上建立相機裝置的本機視訊串流。 |
RemoteParticipant |
用於代表通話中的遠程參與者 |
RemoteVideoStream |
用於表示來自遠端參與者的遠端視訊串流。 |
在名為 index.js 的專案根目錄中建立檔案，以包含本快速入門的應用程式邏輯。 將下列程式代碼新增至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 incomingCall;
let localVideoStream;
let localVideoStreamRenderer;
// UI widgets
let userAccessToken = document.getElementById('user-access-token');
let calleeAcsUserId = document.getElementById('callee-acs-user-id');
let initializeCallAgentButton = document.getElementById('initialize-call-agent');
let startCallButton = document.getElementById('start-call-button');
let hangUpCallButton = document.getElementById('hangup-call-button');
let acceptCallButton = document.getElementById('accept-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 will enable us to make outgoing calls and receive incoming calls.
* You can then use the CallClient.getDeviceManager() API instance to get the DeviceManager.
*/
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 });
// Listen for an incoming call to accept.
callAgent.on('incomingCall', async (args) => {
try {
incomingCall = args.incomingCall;
acceptCallButton.disabled = false;
startCallButton.disabled = true;
} catch (error) {
console.error(error);
}
});
startCallButton.disabled = false;
initializeCallAgentButton.disabled = true;
} catch(error) {
console.error(error);
}
}
/**
* Place a 1:1 outgoing video call to a user
* Add an event listener to initiate a call when the `startCallButton` is clicked:
* First you have to enumerate local cameras using the deviceManager `getCameraList` API.
* In this quickstart we're using the first camera in the collection. Once the desired camera is selected, a
* LocalVideoStream instance will be constructed and passed within `videoOptions` as an item within the
* localVideoStream array to the call method. Once your call connects it will automatically start sending a video stream to the other participant.
*/
startCallButton.onclick = async () => {
try {
const localVideoStream = await createLocalVideoStream();
const videoOptions = localVideoStream ? { localVideoStreams: [localVideoStream] } : undefined;
call = callAgent.startCall([{ communicationUserId: calleeAcsUserId.value.trim() }], { videoOptions });
// Subscribe to the call's properties and events.
subscribeToCall(call);
} catch (error) {
console.error(error);
}
}
/**
* Accepting an incoming call with video
* Add an event listener to accept a call when the `acceptCallButton` is clicked:
* After subscribing to the `CallAgent.on('incomingCall')` event, you can accept the incoming call.
* You can pass the local video stream which you want to use to accept the call with.
*/
acceptCallButton.onclick = async () => {
try {
const localVideoStream = await createLocalVideoStream();
const videoOptions = localVideoStream ? { localVideoStreams: [localVideoStream] } : undefined;
call = await incomingCall.accept({ 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: ${call.state}`);
if(call.state === 'Connected') {
connectedLabel.hidden = false;
acceptCallButton.disabled = true;
startCallButton.disabled = true;
hangUpCallButton.disabled = false;
startVideoButton.disabled = false;
stopVideoButton.disabled = false;
remoteVideosGallery.hidden = false;
} else if (call.state === 'Disconnected') {
connectedLabel.hidden = true;
startCallButton.disabled = false;
hangUpCallButton.disabled = true;
startVideoButton.disabled = true;
stopVideoButton.disabled = true;
console.log(`Call ended, call end reason={code=${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 udpates.
*/
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 remoteParticiapant 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';
let loadingSpinner = document.createElement('div');
loadingSpinner.className = 'loading-spinner';
remoteVideoStream.on('isReceivingChanged', () => {
try {
if (remoteVideoStream.isAvailable) {
const isReceiving = remoteVideoStream.isReceiving;
const isLoadingSpinnerActive = remoteVideoContainer.contains(loadingSpinner);
if (!isReceiving && !isLoadingSpinnerActive) {
remoteVideoContainer.appendChild(loadingSpinner);
} else if (isReceiving && isLoadingSpinnerActive) {
remoteVideoContainer.removeChild(loadingSpinner);
}
}
} catch (e) {
console.error(e);
}
});
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 call
*/
hangUpCallButton.addEventListener("click", async () => {
// end the current call
await call.hangUp();
});
在名為 styles.css 的專案根目錄中建立檔案，以包含本快速入門的應用程式樣式。 將下列程式代碼新增至styles.css：
/**
* CSS for styling the loading spinner over the remote video stream
*/
.remote-video-container {
position: relative;
}
.loading-spinner {
border: 12px solid #f3f3f3;
border-radius: 50%;
border-top: 12px solid #ca5010;
width: 100px;
height: 100px;
-webkit-animation: spin 2s linear infinite; /* Safari */
animation: spin 2s linear infinite;
position: absolute;
margin: auto;
top: 0;
bottom: 0;
left: 0;
right: 0;
transform: translate(-50%, -50%);
}
@keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
/* Safari */
@-webkit-keyframes spin {
0% { -webkit-transform: rotate(0deg); }
100% { -webkit-transform: rotate(360deg); }
}
新增 Webpack 本地伺服器程式代碼
在名為 webpack.config.js 的專案根目錄中建立檔案，以包含本快速入門的本機伺服器邏輯。 將下列程式代碼新增至 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
webpack-dev-server使用來建置並執行您的應用程式。 執行下列命令，將應用程式主機組合在本機 Web 伺服器中：
npx webpack serve --config webpack.config.js
開啟瀏覽器，並在兩個索引標籤上流覽至 http://localhost:8080/.You ，應該會看到下列畫面：
在第一個索引標籤上，輸入有效的使用者存取令牌，在另一個索引標籤上輸入另一個不同的有效使用者存取令牌。
在兩個索引標籤上，按兩下 [初始化呼叫代理程式] 按鈕。 您應該會看到下列畫面：
在第一個索引標籤上，輸入第二個索引標籤 Azure 通訊服務 使用者身分識別，然後按兩下 [開始通話] 按鈕。 第一個索引標籤會啟動第二個索引標籤的傳出呼叫，而第二個索引標籤的 [接受通話] 按鈕會啟用： 
從第二個索引標籤中，按兩下 [接受通話] 按鈕，呼叫會啟動並連線。 您應該會看到下列畫面： 
這兩個索引標籤現在已成功在 1 到 1 個視訊通話中。 這兩個索引標籤可以聽到彼此的音訊，並查看彼此的視訊串流。
使用通訊服務呼叫用戶端連結庫將視訊通話新增至您的應用程式，開始使用 Azure 通訊服務。 瞭解如何包含 1：1 視訊通話，以及如何建立或加入群組通話。 此外，您可以使用適用於 Android 的 Azure 通訊服務 通話 SDK 來啟動、接聽及加入視訊通話。
如果您想要開始使用範例程式代碼，您可以 下載範例應用程式。
必要條件
具有有效訂用帳戶的 Azure 帳戶。 免費建立帳戶。
Android Studio，用於建立 Android 應用程式。
已部署的通訊服務資源。 建立通訊服務資源。 您必須記錄本快速入門的 連接字串。
Azure 通訊服務的使用者存取令牌。 您也可以使用 Azure CLI，搭配您的 連接字串 執行 命令，以建立使用者和存取令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"如需詳細資訊，請參閱 使用 Azure CLI 建立和管理存取令牌。
建立具有空白活動的Android應用程式
從 Android Studio 中，選取 [ 啟動新的 Android Studio 專案]。
在 [電話 和平板計算機] 底下，選取 [空白活動] 項目範本。
針對 [ 最低 SDK]，選取 [API 26：Android 8.0]（Oreo）或更新版本。 請參閱 SDK 支援版本。
Install the package
找出您的專案層級 build.gradle，並將 新增 mavenCentral() 至 和下的 buildscript 存放庫清單 allprojects
buildscript {
repositories {
...
mavenCentral()
...
}
}
allprojects {
repositories {
...
mavenCentral()
...
}
}
然後，在您的模組層級 build.gradle中，將下列幾行新增至 dependencies 和 android 區段：
android {
...
packagingOptions {
pickFirst 'META-INF/*'
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
...
implementation 'com.azure.android:azure-communication-calling:2.0.0'
...
}
將許可權新增至應用程式指令清單
若要要求呼叫所需的許可權，您必須先在應用程式指令清單中宣告許可權 （app/src/main/AndroidManifest.xml）。 以下列程式代碼取代檔案的內容：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.contoso.acsquickstart">
<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/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">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
設定應用程式的版面配置
您需要被呼叫端標識碼或群組通話標識碼的文字輸入、撥打通話的按鈕，以及掛接通話的額外按鈕。
也需要兩個按鈕來開啟和關閉本機視訊。 您必須為本機和遠端視訊串流放置兩個容器。 您可以透過設計工具或編輯版面配置 XML 來新增這些按鈕。
移至 app/src/main/res/layout/activity_main.xml，並以下列程式代碼取代檔案的內容：
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/call_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:gravity="center"
android:hint="Callee ID"
android:inputType="textPersonName"
app:layout_constraintBottom_toTopOf="@+id/call_button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.064" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/call_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:gravity="center"
android:text="Call"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/show_preview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:gravity="center"
android:text="Show Video"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/hide_preview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:gravity="center"
android:text="Hide Video"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/hang_up"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:gravity="center"
android:text="Hang Up"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</LinearLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<GridLayout
android:id="@+id/remotevideocontainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:columnCount="2"
android:rowCount="2"
android:padding="10dp"></GridLayout>
</ScrollView>
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/localvideocontainer"
android:layout_width="180dp"
android:layout_height="300dp"
android:layout_gravity="right|bottom"
android:orientation="vertical"
android:padding="10dp">
<Button
android:id="@+id/switch_source"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Switch Source"
android:visibility="invisible" />
</LinearLayout>
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
建立主要活動 Scaffolding 和系結
建立版面配置后，您可以新增系結，以及活動的基本 Scaffolding。 活動會處理要求運行時間許可權、建立呼叫代理程式，以及在按下按鈕時放置呼叫。
方法 onCreate 會覆寫以叫 getAllPermissions 用 和 createAgent，並新增呼叫按鈕的系結。 只有在建立活動時，才會發生此事件。 如需 的詳細資訊onCreate，請參閱瞭解活動生命週期指南。
移至 MainActivity.java 檔案，並以下列程式代碼取代內容：
package com.example.videocallingquickstart;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.content.pm.PackageManager;
import android.media.AudioManager;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridLayout;
import android.widget.Toast;
import android.widget.LinearLayout;
import android.content.Context;
import com.azure.android.communication.calling.CallState;
import com.azure.android.communication.calling.CallingCommunicationException;
import com.azure.android.communication.calling.ParticipantsUpdatedListener;
import com.azure.android.communication.calling.PropertyChangedEvent;
import com.azure.android.communication.calling.PropertyChangedListener;
import com.azure.android.communication.calling.StartCallOptions;
import com.azure.android.communication.calling.VideoDeviceInfo;
import com.azure.android.communication.common.CommunicationIdentifier;
import com.azure.android.communication.common.CommunicationTokenCredential;
import com.azure.android.communication.calling.CallAgent;
import com.azure.android.communication.calling.CallClient;
import com.azure.android.communication.calling.DeviceManager;
import com.azure.android.communication.calling.VideoOptions;
import com.azure.android.communication.calling.LocalVideoStream;
import com.azure.android.communication.calling.VideoStreamRenderer;
import com.azure.android.communication.calling.VideoStreamRendererView;
import com.azure.android.communication.calling.CreateViewOptions;
import com.azure.android.communication.calling.ScalingMode;
import com.azure.android.communication.calling.IncomingCall;
import com.azure.android.communication.calling.Call;
import com.azure.android.communication.calling.AcceptCallOptions;
import com.azure.android.communication.calling.ParticipantsUpdatedEvent;
import com.azure.android.communication.calling.RemoteParticipant;
import com.azure.android.communication.calling.RemoteVideoStream;
import com.azure.android.communication.calling.RemoteVideoStreamsEvent;
import com.azure.android.communication.calling.RendererListener;
import com.azure.android.communication.common.CommunicationUserIdentifier;
import com.azure.android.communication.common.MicrosoftTeamsUserIdentifier;
import com.azure.android.communication.common.PhoneNumberIdentifier;
import com.azure.android.communication.common.UnknownIdentifier;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
public class MainActivity extends AppCompatActivity {
private CallAgent callAgent;
private VideoDeviceInfo currentCamera;
private LocalVideoStream currentVideoStream;
private DeviceManager deviceManager;
private IncomingCall incomingCall;
private Call call;
VideoStreamRenderer previewRenderer;
VideoStreamRendererView preview;
final Map<Integer, StreamData> streamData = new HashMap<>();
private boolean renderRemoteVideo = true;
private ParticipantsUpdatedListener remoteParticipantUpdatedListener;
private PropertyChangedListener onStateChangedListener;
final HashSet<String> joinedParticipants = new HashSet<>();
Button switchSourceButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getAllPermissions();
createAgent();
handleIncomingCall();
Button callButton = findViewById(R.id.call_button);
callButton.setOnClickListener(l -> startCall());
Button hangupButton = findViewById(R.id.hang_up);
hangupButton.setOnClickListener(l -> hangUp());
Button startVideo = findViewById(R.id.show_preview);
startVideo.setOnClickListener(l -> turnOnLocalVideo());
Button stopVideo = findViewById(R.id.hide_preview);
stopVideo.setOnClickListener(l -> turnOffLocalVideo());
switchSourceButton = findViewById(R.id.switch_source);
switchSourceButton.setOnClickListener(l -> switchSource());
setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
}
/**
* Request each required permission if the app doesn't already have it.
*/
private void getAllPermissions() {
// See section on requesting permissions
}
/**
* Create the call agent for placing calls
*/
private void createAgent() {
// See section on creating the call agent
}
/**
* Handle incoming calls
*/
private void handleIncomingCall() {
// See section on answering incoming call
}
/**
* Place a call to the callee id provided in `callee_id` text input.
*/
private void startCall() {
// See section on starting the call
}
/**
* End calls
*/
private void hangUp() {
// See section on ending the call
}
/**
* Mid-call operations
*/
public void turnOnLocalVideo() {
// See section
}
public void turnOffLocalVideo() {
// See section
}
/**
* Change the active camera for the next available
*/
public void switchSource() {
// See section
}
}
在運行時間要求許可權
針對 Android 6.0 和更新版本（API 層級 23）和 targetSdkVersion 23 或更新版本，許可權會在運行時間授與，而不是安裝應用程式時授與。 為了支援它， getAllPermissions 可以實作來呼叫 ActivityCompat.checkSelfPermission 和 ActivityCompat.requestPermissions 針對每個必要的許可權。
/**
* Request each required permission if the app doesn't already have it.
*/
private void getAllPermissions() {
String[] requiredPermissions = new String[]{Manifest.permission.RECORD_AUDIO, Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_PHONE_STATE};
ArrayList<String> permissionsToAskFor = new ArrayList<>();
for (String permission : requiredPermissions) {
if (ActivityCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {
permissionsToAskFor.add(permission);
}
}
if (!permissionsToAskFor.isEmpty()) {
ActivityCompat.requestPermissions(this, permissionsToAskFor.toArray(new String[0]), 1);
}
}
注意
當您設計應用程式時，請考慮何時應要求這些許可權。 應該視需要要求許可權，而不是事先要求許可權。 如需詳細資訊，請參閱 Android 許可權指南。
物件模型
下列類別和介面會處理 Azure 通訊服務 呼叫 SDK 的一些主要功能：
| 名稱 | 描述 |
|---|---|
CallClient |
呼叫 SDK 的主要進入點。 |
CallAgent |
用來啟動和管理話務。 |
CommunicationTokenCredential |
用來具現化 的 CallAgent令牌認證。 |
CommunicationIdentifier |
做為可能屬於通話一部分的不同參與者類型。 |
從使用者存取令牌建立代理程式
您需要使用者令牌才能建立已驗證的呼叫代理程式。 一般而言，此令牌是從具有應用程式特定驗證的服務產生。 如需使用者存取令牌的詳細資訊，請參閱 使用者存取令牌。
針對快速入門，請將 取代<User_Access_Token>為您 Azure 通訊服務 資源產生的使用者存取令牌。
/**
* Create the call agent for placing calls
*/
private void createAgent() {
Context context = this.getApplicationContext();
String userToken = "<USER_ACCESS_TOKEN>";
try {
CommunicationTokenCredential credential = new CommunicationTokenCredential(userToken);
CallClient callClient = new CallClient();
deviceManager = callClient.getDeviceManager(context).get();
callAgent = callClient.createCallAgent(getApplicationContext(), credential).get();
} catch (Exception ex) {
Toast.makeText(context, "Failed to create call agent.", Toast.LENGTH_SHORT).show();
}
}
使用通話代理程序啟動視訊通話
您可以使用呼叫代理程式來撥打電話。 您只需要提供被呼叫端標識碼和通話選項的清單。
若要使用視訊來呼叫，您必須使用 deviceManagergetCameras API 列舉本機相機。 選取所需的相機之後，請使用它來建構 LocalVideoStream 實例。 然後將它 videoOptions 當做陣列中的 localVideoStream 項目傳遞至呼叫方法。 當通話連線時，它會自動開始將視訊串流從選取的相機傳送給其他參與者。
private void startCall() {
Context context = this.getApplicationContext();
EditText callIdView = findViewById(R.id.call_id);
String callId = callIdView.getText().toString();
ArrayList<CommunicationIdentifier> participants = new ArrayList<CommunicationIdentifier>();
List<VideoDeviceInfo> cameras = deviceManager.getCameras();
StartCallOptions options = new StartCallOptions();
if(!cameras.isEmpty()) {
currentCamera = getNextAvailableCamera(null);
currentVideoStream = new LocalVideoStream(currentCamera, context);
LocalVideoStream[] videoStreams = new LocalVideoStream[1];
videoStreams[0] = currentVideoStream;
VideoOptions videoOptions = new VideoOptions(videoStreams);
options.setVideoOptions(videoOptions);
showPreview(currentVideoStream);
}
participants.add(new CommunicationUserIdentifier(callId));
call = callAgent.startCall(
context,
participants,
options);
//Subscribe to events on updates of call state and remote participants
remoteParticipantUpdatedListener = this::handleRemoteParticipantsUpdate;
onStateChangedListener = this::handleCallOnStateChanged;
call.addOnRemoteParticipantsUpdatedListener(remoteParticipantUpdatedListener);
call.addOnStateChangedListener(onStateChangedListener);
}
在本快速入門中，您會依賴 函 getNextAvailableCamera 式來挑選呼叫所使用的相機。 函式會採用相機列舉作為輸入，並逐一查看清單，以取得下一個可用的相機。 如果自變數為 null，函式會挑選清單中的第一個裝置。 如果您選取 [ 開始通話] 時沒有可用的相機，則會改為啟動音訊通話。 但是，如果遠端參與者使用視訊回答，您仍然可以看到遠端視訊串流。
private VideoDeviceInfo getNextAvailableCamera(VideoDeviceInfo camera) {
List<VideoDeviceInfo> cameras = deviceManager.getCameras();
int currentIndex = 0;
if (camera == null) {
return cameras.isEmpty() ? null : cameras.get(0);
}
for (int i = 0; i < cameras.size(); i++) {
if (camera.getId().equals(cameras.get(i).getId())) {
currentIndex = i;
break;
}
}
int newIndex = (currentIndex + 1) % cameras.size();
return cameras.get(newIndex);
}
建構 LocalVideoStream 實例之後，您可以建立轉譯器以在UI上顯示它。
private void showPreview(LocalVideoStream stream) {
previewRenderer = new VideoStreamRenderer(stream, this);
LinearLayout layout = findViewById(R.id.localvideocontainer);
preview = previewRenderer.createView(new CreateViewOptions(ScalingMode.FIT));
preview.setTag(0);
runOnUiThread(() -> {
layout.addView(preview);
switchSourceButton.setVisibility(View.VISIBLE);
});
}
若要允許使用者切換本機視訊來源，請使用 switchSource。 此方法會挑選下一個可用的相機，並將其定義為本機數據流。
public void switchSource() {
if (currentVideoStream != null) {
try {
currentCamera = getNextAvailableCamera(currentCamera);
currentVideoStream.switchSource(currentCamera).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
}
接受來電
您可以藉由在 addOnIncomingCallListener 上 callAgent訂閱 來取得來電。
private void handleIncomingCall() {
callAgent.addOnIncomingCallListener((incomingCall) -> {
this.incomingCall = incomingCall;
Executors.newCachedThreadPool().submit(this::answerIncomingCall);
});
}
若要接受與視訊相機開啟的呼叫，請使用 deviceManagergetCameras API 列舉本機相機。 挑選相機，並建構 LocalVideoStream 實例。 將它 acceptCallOptions 傳入 ，再呼叫 accept 物件上的 call 方法。
private void answerIncomingCall() {
Context context = this.getApplicationContext();
if (incomingCall == null){
return;
}
AcceptCallOptions acceptCallOptions = new AcceptCallOptions();
List<VideoDeviceInfo> cameras = deviceManager.getCameras();
if(!cameras.isEmpty()) {
currentCamera = getNextAvailableCamera(null);
currentVideoStream = new LocalVideoStream(currentCamera, context);
LocalVideoStream[] videoStreams = new LocalVideoStream[1];
videoStreams[0] = currentVideoStream;
VideoOptions videoOptions = new VideoOptions(videoStreams);
acceptCallOptions.setVideoOptions(videoOptions);
showPreview(currentVideoStream);
}
try {
call = incomingCall.accept(context, acceptCallOptions).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
//Subscribe to events on updates of call state and remote participants
remoteParticipantUpdatedListener = this::handleRemoteParticipantsUpdate;
onStateChangedListener = this::handleCallOnStateChanged;
call.addOnRemoteParticipantsUpdatedListener(remoteParticipantUpdatedListener);
call.addOnStateChangedListener(onStateChangedListener);
}
遠端參與者和遠端視訊串流
當您開始通話或接聽來電時，您必須訂閱 addOnRemoteParticipantsUpdatedListener 事件來處理遠端參與者。
remoteParticipantUpdatedListener = this::handleRemoteParticipantsUpdate;
call.addOnRemoteParticipantsUpdatedListener(remoteParticipantUpdatedListener);
當您使用相同類別內定義的事件接聽程式時，請將接聽程式系結至變數。 將變數當做自變數傳入，以新增和移除接聽程式方法。
如果您嘗試將接聽程式直接傳遞為自變數，您會失去該接聽程序的參考。 Java 會建立這些接聽程式的新實例，而不是參考先前建立的接聽程式。 您無法移除先前的實例，因為您沒有這些實例的參考。
遠端視訊串流更新
針對 1：1 通話，您必須處理新增的參與者。 當您移除遠端參與者時，通話會結束。 針對已新增的參與者，您可以訂閱 addOnVideoStreamsUpdatedListener 以處理視訊串流更新。
public void handleRemoteParticipantsUpdate(ParticipantsUpdatedEvent args) {
handleAddedParticipants(args.getAddedParticipants());
}
private void handleAddedParticipants(List<RemoteParticipant> participants) {
for (RemoteParticipant remoteParticipant : participants) {
if(!joinedParticipants.contains(getId(remoteParticipant))) {
joinedParticipants.add(getId(remoteParticipant));
if (renderRemoteVideo) {
for (RemoteVideoStream stream : remoteParticipant.getVideoStreams()) {
StreamData data = new StreamData(stream, null, null);
streamData.put(stream.getId(), data);
startRenderingVideo(data);
}
}
remoteParticipant.addOnVideoStreamsUpdatedListener(videoStreamsEventArgs -> videoStreamsUpdated(videoStreamsEventArgs));
}
}
}
private void videoStreamsUpdated(RemoteVideoStreamsEvent videoStreamsEventArgs) {
for(RemoteVideoStream stream : videoStreamsEventArgs.getAddedRemoteVideoStreams()) {
StreamData data = new StreamData(stream, null, null);
streamData.put(stream.getId(), data);
if (renderRemoteVideo) {
startRenderingVideo(data);
}
}
for(RemoteVideoStream stream : videoStreamsEventArgs.getRemovedRemoteVideoStreams()) {
stopRenderingVideo(stream);
}
}
public String getId(final RemoteParticipant remoteParticipant) {
final CommunicationIdentifier identifier = remoteParticipant.getIdentifier();
if (identifier instanceof PhoneNumberIdentifier) {
return ((PhoneNumberIdentifier) identifier).getPhoneNumber();
} else if (identifier instanceof MicrosoftTeamsUserIdentifier) {
return ((MicrosoftTeamsUserIdentifier) identifier).getUserId();
} else if (identifier instanceof CommunicationUserIdentifier) {
return ((CommunicationUserIdentifier) identifier).getId();
} else {
return ((UnknownIdentifier) identifier).getId();
}
}
轉譯遠端影片
建立遠端視訊數據流的轉譯器，並將其附加至檢視以開始轉譯遠程檢視。 處置檢視以停止轉譯。
void startRenderingVideo(StreamData data){
if (data.renderer != null) {
return;
}
GridLayout layout = ((GridLayout)findViewById(R.id.remotevideocontainer));
data.renderer = new VideoStreamRenderer(data.stream, this);
data.renderer.addRendererListener(new RendererListener() {
@Override
public void onFirstFrameRendered() {
String text = data.renderer.getSize().toString();
Log.i("MainActivity", "Video rendering at: " + text);
}
@Override
public void onRendererFailedToStart() {
String text = "Video failed to render";
Log.i("MainActivity", text);
}
});
data.rendererView = data.renderer.createView(new CreateViewOptions(ScalingMode.FIT));
data.rendererView.setTag(data.stream.getId());
runOnUiThread(() -> {
GridLayout.LayoutParams params = new GridLayout.LayoutParams(layout.getLayoutParams());
DisplayMetrics displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
params.height = (int)(displayMetrics.heightPixels / 2.5);
params.width = displayMetrics.widthPixels / 2;
layout.addView(data.rendererView, params);
});
}
void stopRenderingVideo(RemoteVideoStream stream) {
StreamData data = streamData.get(stream.getId());
if (data == null || data.renderer == null) {
return;
}
runOnUiThread(() -> {
GridLayout layout = findViewById(R.id.remotevideocontainer);
for(int i = 0; i < layout.getChildCount(); ++ i) {
View childView = layout.getChildAt(i);
if ((int)childView.getTag() == data.stream.getId()) {
layout.removeViewAt(i);
}
}
});
data.rendererView = null;
// Dispose renderer
data.renderer.dispose();
data.renderer = null;
}
static class StreamData {
RemoteVideoStream stream;
VideoStreamRenderer renderer;
VideoStreamRendererView rendererView;
StreamData(RemoteVideoStream stream, VideoStreamRenderer renderer, VideoStreamRendererView rendererView) {
this.stream = stream;
this.renderer = renderer;
this.rendererView = rendererView;
}
}
呼叫狀態更新
呼叫的狀態可能會從已連線變更為已中斷連線。 當通話連線時，您可以處理遠端參與者，並在通話中斷聯機時處置 previewRenderer 以停止本機視訊。
private void handleCallOnStateChanged(PropertyChangedEvent args) {
if (call.getState() == CallState.CONNECTED) {
runOnUiThread(() -> Toast.makeText(this, "Call is CONNECTED", Toast.LENGTH_SHORT).show());
handleCallState();
}
if (call.getState() == CallState.DISCONNECTED) {
runOnUiThread(() -> Toast.makeText(this, "Call is DISCONNECTED", Toast.LENGTH_SHORT).show());
if (previewRenderer != null) {
previewRenderer.dispose();
}
switchSourceButton.setVisibility(View.INVISIBLE);
}
}
結束通話
在呼叫實例上呼叫 hangUp() 函式來結束呼叫。 處置 previewRenderer 以停止本機視訊。
private void hangUp() {
try {
call.hangUp().get();
switchSourceButton.setVisibility(View.INVISIBLE);
} catch (ExecutionException | InterruptedException e) {
e.printStackTrace();
}
if (previewRenderer != null) {
previewRenderer.dispose();
}
}
隱藏並顯示本機影片
呼叫開始時，您可以使用 停止本機視訊轉譯和串流 turnOffLocalVideo()，這個方法會移除包裝本機轉譯的檢視，並處置目前的數據流。 若要繼續串流並再次轉譯本機預覽，請使用 turnOnLocalVideo()，這個方法會顯示影片預覽並開始串流。
public void turnOnLocalVideo() {
List<VideoDeviceInfo> cameras = deviceManager.getCameras();
if(!cameras.isEmpty()) {
try {
currentVideoStream = new LocalVideoStream(currentCamera, this);
showPreview(currentVideoStream);
call.startVideo(this, currentVideoStream).get();
switchSourceButton.setVisibility(View.VISIBLE);
} catch (CallingCommunicationException acsException) {
acsException.printStackTrace();
} catch (ExecutionException | InterruptedException e) {
e.printStackTrace();
}
}
}
public void turnOffLocalVideo() {
try {
LinearLayout container = findViewById(R.id.localvideocontainer);
for (int i = 0; i < container.getChildCount(); ++i) {
Object tag = container.getChildAt(i).getTag();
if (tag != null && (int)tag == 0) {
container.removeViewAt(i);
}
}
switchSourceButton.setVisibility(View.INVISIBLE);
previewRenderer.dispose();
previewRenderer = null;
call.stopVideo(this, currentVideoStream).get();
} catch (CallingCommunicationException acsException) {
acsException.printStackTrace();
} catch (ExecutionException | InterruptedException e) {
e.printStackTrace();
}
}
執行程式碼
您現在可以使用 Android Studio 工具列上的 [ 執行應用程式 ] 按鈕來啟動應用程式。
| 已完成的應用程式 | 1：1 通話 |
|---|---|
|
|
新增群組呼叫功能
現在您可以更新應用程式，讓使用者在1：1通話或群組通話之間選擇。
更新版面配置
使用單選按鈕來選取 SDK 是否建立 1：1 通話或加入群組呼叫。 單選按鈕位於頂端，因此 app/src/main/res/layout/activity_main.xml的第一個區段如下所示。
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioGroup
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioButton
android:id="@+id/one_to_one_call"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="One to one call" />
<RadioButton
android:id="@+id/group_call"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Group call" />
</RadioGroup>
<EditText
android:id="@+id/call_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:gravity="center"
android:hint="Callee ID"
android:inputType="textPersonName"
app:layout_constraintBottom_toTopOf="@+id/call_button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.064" />
.
.
.
</androidx.constraintlayout.widget.ConstraintLayout>
更新 MainActivity.Java
您現在可以更新元素和邏輯，以決定何時要建立 1：1 呼叫，以及何時加入群組呼叫。 程序代碼的第一個部分需要更新，才能新增相依性、專案和其他組態。
相依性：
import android.widget.RadioButton;
import com.azure.android.communication.calling.GroupCallLocator;
import com.azure.android.communication.calling.JoinCallOptions;
import java.util.UUID;
全域元素：
RadioButton oneToOneCall, groupCall;
更新 onCreate()：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getAllPermissions();
createAgent();
handleIncomingCall();
Button callButton = findViewById(R.id.call_button);
callButton.setOnClickListener(l -> startCall());
Button hangupButton = findViewById(R.id.hang_up);
hangupButton.setOnClickListener(l -> hangUp());
Button startVideo = findViewById(R.id.show_preview);
startVideo.setOnClickListener(l -> turnOnLocalVideo());
Button stopVideo = findViewById(R.id.hide_preview);
stopVideo.setOnClickListener(l -> turnOffLocalVideo());
switchSourceButton = findViewById(R.id.switch_source);
switchSourceButton.setOnClickListener(l -> switchSource());
setVolumeControlStream(AudioManager.STREAM_VOICE_CALL);
oneToOneCall = findViewById(R.id.one_to_one_call);
oneToOneCall.setOnClickListener(this::onCallTypeSelected);
oneToOneCall.setChecked(true);
groupCall = findViewById(R.id.group_call);
groupCall.setOnClickListener(this::onCallTypeSelected);
}
更新 startCall()：
private void startCall() {
Context context = this.getApplicationContext();
EditText callIdView = findViewById(R.id.call_id);
String callId = callIdView.getText().toString();
ArrayList<CommunicationIdentifier> participants = new ArrayList<CommunicationIdentifier>();
List<VideoDeviceInfo> cameras = deviceManager.getCameras();
if(oneToOneCall.isChecked()){
StartCallOptions options = new StartCallOptions();
if(!cameras.isEmpty()) {
currentCamera = getNextAvailableCamera(null);
currentVideoStream = new LocalVideoStream(currentCamera, context);
LocalVideoStream[] videoStreams = new LocalVideoStream[1];
videoStreams[0] = currentVideoStream;
VideoOptions videoOptions = new VideoOptions(videoStreams);
options.setVideoOptions(videoOptions);
showPreview(currentVideoStream);
}
participants.add(new CommunicationUserIdentifier(callId));
call = callAgent.startCall(
context,
participants,
options);
}
else{
JoinCallOptions options = new JoinCallOptions();
if(!cameras.isEmpty()) {
currentCamera = getNextAvailableCamera(null);
currentVideoStream = new LocalVideoStream(currentCamera, context);
LocalVideoStream[] videoStreams = new LocalVideoStream[1];
videoStreams[0] = currentVideoStream;
VideoOptions videoOptions = new VideoOptions(videoStreams);
options.setVideoOptions(videoOptions);
showPreview(currentVideoStream);
}
GroupCallLocator groupCallLocator = new GroupCallLocator(UUID.fromString(callId));
call = callAgent.join(
context,
groupCallLocator,
options);
}
remoteParticipantUpdatedListener = this::handleRemoteParticipantsUpdate;
onStateChangedListener = this::handleCallOnStateChanged;
call.addOnRemoteParticipantsUpdatedListener(remoteParticipantUpdatedListener);
call.addOnStateChangedListener(onStateChangedListener);
}
新增 onCallTypeSelected()：
public void onCallTypeSelected(View view) {
boolean checked = ((RadioButton) view).isChecked();
EditText callIdView = findViewById(R.id.call_id);
switch(view.getId()) {
case R.id.one_to_one_call:
if (checked){
callIdView.setHint("Callee id");
}
break;
case R.id.group_call:
if (checked){
callIdView.setHint("Group Call GUID");
}
break;
}
}
執行升級的應用程式
此時，您可以使用 Android Studio 工具列上的 [執行應用程式] 按鈕來啟動應用程式。
| 螢幕更新 | 群組通話 |
|---|---|
|
|
開始使用 Azure 通訊服務，方法是使用通訊服務呼叫 SDK，將一個視訊通話新增至您的應用程式。 您將瞭解如何使用適用於 iOS 的 Azure 通訊服務 通話 SDK 來啟動和接聽視訊通話。
範例程式碼
如果您想要直接跳到結尾，您可以在 GitHub 上下載本快速入門作為範例。
必要條件
取得具有使用中訂用帳戶的 Azure 帳戶。 免費建立帳戶。
執行 Xcode 的 Mac，以及安裝到 Keychain 的有效開發人員憑證。
建立作用中的通訊服務資源。 建立通訊服務資源。 您必須記錄本快速入門的 連接字串。
Azure 通訊服務的使用者存取令牌。 您也可以使用 Azure CLI，搭配 連接字串 執行 命令，以建立使用者和存取令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"如需詳細資訊，請參閱 使用 Azure CLI 建立和管理存取令牌。
設定
建立 Xcode 專案
在 Xcode 中，建立新的 iOS 專案，然後選取 [單一檢視應用程式] 範本。 本教學課程使用 SwiftUI 架構，因此您應該將 Language 設定為 Swift，並將使用者介面設定為 SwiftUI。 您不會在此快速入門期間建立測試。 請隨意取消核取 [包含測試]。
安裝CocoaPods
使用本指南在 Mac 上安裝 CocoaPods 。
使用 CocoaPods 安裝套件和相依性
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。將下列程式代碼新增至
Podfile並儲存。 請參閱 SDK 支援版本。
platform :ios, '13.0'
use_frameworks!
target 'VideoCallingQuickstart' do
pod 'AzureCommunicationCalling', '~> 1.0.0'
end
執行 Pod 安裝。
.xcworkspace使用 Xcode 開啟 。
直接使用 XCFramework
如果您不是使用 CocoaPods 作為相依性管理員，您可以直接從我們的發行頁面下載 AzureCommunicationCalling.xcframework 。
請務必知道有 AzureCommunicationCalling 相依性 AzureCommunicationCommon ，因此您必須在專案中安裝它。
注意
雖然 AzureCommunicationCommon 是純 Swift 套件，但您無法使用 Swift Package Manager 來安裝它AzureCommunicationCalling，因為後者是 Objective-C 架構，並Swift Package Manager故意不支援 Swift ObjC 介面標頭的設計，這表示若使用 Swift Package Manager安裝，就無法與 AzureCommunicationCalling 一起運作。 您必須透過另一個相依性管理員安裝，或從AzureCommunicationCommon來源產生 xcframework ，並匯入至您的專案。
要求存取麥克風和相機
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。 您可以將相關聯的值設定為字串，其中包含系統用來要求使用者存取的對話方塊。
以滑鼠右鍵按兩下 Info.plist 專案樹狀結構的項目，然後選取 [開啟為 > 原始程式碼]。 在最上層 <dict> 區段新增下列幾行，然後儲存盤案。
<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
開啟項目的 ContentView.swift 檔案，並將匯入宣告新增至檔案頂端以匯入 AzureCommunicationCalling 連結庫和 AVFoundation。 AVFoundation 可用來從程式代碼擷取音訊許可權。
import AzureCommunicationCalling
import AVFoundation
物件模型
下列類別和介面會處理 iOS Azure 通訊服務 呼叫 SDK 的一些主要功能。
| 名稱 | 描述 |
|---|---|
CallClient |
CallClient是呼叫 SDK 的主要進入點。 |
CallAgent |
CallAgent用來啟動和管理話務。 |
CommunicationTokenCredential |
CommunicationTokenCredential會當做權杖認證來具現化 CallAgent。 |
CommunicationIdentifier |
CommunicationIdentifier用來表示使用者的身分識別，它可以是下列其中一個選項：CommunicationUserIdentifier、 PhoneNumberIdentifier 或 CallingApplication。 |
建立通話代理程式
將 ContentView struct 的實作取代為一些簡單的 UI 控件，讓用戶能夠起始和結束呼叫。 在本快速入門中，我們會將這些商業規則新增至這些控件。
struct ContentView: View {
@State var callee: String = ""
@State var callClient: CallClient?
@State var callAgent: CallAgent?
@State var call: Call?
@State var deviceManager: DeviceManager?
@State var localVideoStream:[LocalVideoStream]?
@State var incomingCall: IncomingCall?
@State var sendingVideo:Bool = false
@State var errorMessage:String = "Unknown"
@State var remoteVideoStreamData:[Int32:RemoteVideoStreamData] = [:]
@State var previewRenderer:VideoStreamRenderer? = nil
@State var previewView:RendererView? = nil
@State var remoteRenderer:VideoStreamRenderer? = nil
@State var remoteViews:[RendererView] = []
@State var remoteParticipant: RemoteParticipant?
@State var remoteVideoSize:String = "Unknown"
@State var isIncomingCall:Bool = false
@State var callObserver:CallObserver?
@State var remoteParticipantObserver:RemoteParticipantObserver?
var body: some View {
NavigationView {
ZStack{
Form {
Section {
TextField("Who would you like to call?", text: $callee)
Button(action: startCall) {
Text("Start Call")
}.disabled(callAgent == nil)
Button(action: endCall) {
Text("End Call")
}.disabled(call == nil)
Button(action: toggleLocalVideo) {
HStack {
Text(sendingVideo ? "Turn Off Video" : "Turn On Video")
}
}
}
}
// Show incoming call banner
if (isIncomingCall) {
HStack() {
VStack {
Text("Incoming call")
.padding(10)
.frame(maxWidth: .infinity, alignment: .topLeading)
}
Button(action: answerIncomingCall) {
HStack {
Text("Answer")
}
.frame(width:80)
.padding(.vertical, 10)
.background(Color(.green))
}
Button(action: declineIncomingCall) {
HStack {
Text("Decline")
}
.frame(width:80)
.padding(.vertical, 10)
.background(Color(.red))
}
}
.frame(maxWidth: .infinity, alignment: .topLeading)
.padding(10)
.background(Color.gray)
}
ZStack{
VStack{
ForEach(remoteViews, id:\.self) { renderer in
ZStack{
VStack{
RemoteVideoView(view: renderer)
.frame(width: .infinity, height: .infinity)
.background(Color(.lightGray))
}
}
Button(action: endCall) {
Text("End Call")
}.disabled(call == nil)
Button(action: toggleLocalVideo) {
HStack {
Text(sendingVideo ? "Turn Off Video" : "Turn On Video")
}
}
}
}.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
VStack{
if(sendingVideo)
{
VStack{
PreviewVideoStream(view: previewView!)
.frame(width: 135, height: 240)
.background(Color(.lightGray))
}
}
}.frame(maxWidth:.infinity, maxHeight:.infinity,alignment: .bottomTrailing)
}
}
.navigationBarTitle("Video Calling Quickstart")
}.onAppear{
// Authenticate the client
// Initialize the CallAgent and access Device Manager
// Ask for permissions
}
}
}
//Functions and Observers
struct PreviewVideoStream: UIViewRepresentable {
let view:RendererView
func makeUIView(context: Context) -> UIView {
return view
}
func updateUIView(_ uiView: UIView, context: Context) {}
}
struct RemoteVideoView: UIViewRepresentable {
let view:RendererView
func makeUIView(context: Context) -> UIView {
return view
}
func updateUIView(_ uiView: UIView, context: Context) {}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
驗證用戶端
若要初始化 CallAgent 實例，您需要使用者存取令牌，以便進行和接聽呼叫。 如果您沒有可用的令牌，請參閱使用者存取令牌檔。
一旦您有令牌，請在 中將下列程式代碼新增至 回onAppearContentView.swift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 和存取 裝置管理員
若要從 CallClient 建立 CallAgent 實例，請使用 callClient.createCallAgent 方法，在初始化 CallAgent 對象之後，以異步方式傳回 CallAgent 物件。 DeviceManager 可讓您列舉可用於傳輸音訊/視訊串流之呼叫中的本機裝置。 它也可讓您要求使用者存取麥克風/相機的許可權。
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 = incomingCallHandler
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")
}
}
}
}
要求許可權
我們需要將下列程式代碼新增至回 onAppear 呼，以要求音訊和視訊的許可權。
AVAudioSession.sharedInstance().requestRecordPermission { (granted) in
if granted {
AVCaptureDevice.requestAccess(for: .video) { (videoGranted) in
/* NO OPERATION */
}
}
}
設定音訊會話
您可以使用 AVAudioSession 物件來設定應用程式的音訊會話。 以下是為您的應用程式啟用藍牙音訊裝置的範例：
func configureAudioSession() -> Error? {
// Retrieve the audio session.
let audioSession: AVAudioSession = AVAudioSession.sharedInstance()
// set options to allow bluetooth device
let options: AVAudioSession.CategoryOptions = .allowBluetooth
var configError: Error?
do {
// Set the audio session category.
try audioSession.setCategory(.playAndRecord, options: options)
print("configureAudioSession successfully")
} catch {
print("configureAudioSession failed")
configError = error
}
return configError
}
顯示本機影片
開始通話之前，您可以管理與影片相關的設定。 在本快速入門中，我們會介紹在通話之前或期間切換本機影片的實作。
首先，我們需要使用 deviceManager來存取本機相機。 選取所需的相機之後，我們可以建構 LocalVideoStream 並建立 VideoStreamRenderer，然後將它附加至 previewView。 在通話期間，我們可以使用 startVideo 或 stopVideo 來啟動或停止傳送 LocalVideoStream 給遠端參與者。 此函式也適用於處理傳入呼叫。
func toggleLocalVideo() {
// toggling video before call starts
if (call == nil)
{
if(!sendingVideo)
{
self.callClient = CallClient()
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")
}
}
guard let deviceManager = deviceManager else {
return
}
let camera = deviceManager.cameras.first
let scalingMode = ScalingMode.fit
if (self.localVideoStream == nil) {
self.localVideoStream = [LocalVideoStream]()
}
localVideoStream!.append(LocalVideoStream(camera: camera!))
previewRenderer = try! VideoStreamRenderer(localVideoStream: localVideoStream!.first!)
previewView = try! previewRenderer!.createView(withOptions: CreateViewOptions(scalingMode:scalingMode))
self.sendingVideo = true
}
else{
self.sendingVideo = false
self.previewView = nil
self.previewRenderer!.dispose()
self.previewRenderer = nil
}
}
// toggle local video during the call
else{
if (sendingVideo) {
call!.stopVideo(stream: localVideoStream!.first!) { (error) in
if (error != nil) {
print("cannot stop video")
}
else {
self.sendingVideo = false
self.previewView = nil
self.previewRenderer!.dispose()
self.previewRenderer = nil
}
}
}
else {
guard let deviceManager = deviceManager else {
return
}
let camera = deviceManager.cameras.first
let scalingMode = ScalingMode.fit
if (self.localVideoStream == nil) {
self.localVideoStream = [LocalVideoStream]()
}
localVideoStream!.append(LocalVideoStream(camera: camera!))
previewRenderer = try! VideoStreamRenderer(localVideoStream: localVideoStream!.first!)
previewView = try! previewRenderer!.createView(withOptions: CreateViewOptions(scalingMode:scalingMode))
call!.startVideo(stream:(localVideoStream?.first)!) { (error) in
if (error != nil) {
print("cannot start video")
}
else {
self.sendingVideo = true
}
}
}
}
}
撥打撥出電話
方法 startCall 會設定為點選 [開始呼叫] 按鈕時所執行的動作。 在本快速入門中，傳出通話預設為音訊。 若要使用視訊啟動通話，我們需要使用 來設定 VideoOptionsLocalVideoStream ，並將它傳遞給 ， startCallOptions 以設定通話的初始選項。
func startCall() {
let startCallOptions = StartCallOptions()
if(sendingVideo)
{
if (self.localVideoStream == nil) {
self.localVideoStream = [LocalVideoStream]()
}
let videoOptions = VideoOptions(localVideoStreams: localVideoStream!)
startCallOptions.videoOptions = videoOptions
}
let callees:[CommunicationIdentifier] = [CommunicationUserIdentifier(self.callee)]
self.callAgent?.startCall(participants: callees, options: startCallOptions) { (call, error) in
setCallAndObserver(call: call, error: error)
}
}
CallObserver 和 RemoteParticipantObserver 可用來管理中呼叫事件和遠端參與者。 我們會在函式 setCallAndObserver 中設定觀察者。
func setCallAndObserver(call: Call!, error: Error?) {
if error == nil {
self.call = call
self.callObserver = CallObserver(self)
self.call!.delegate = self.callObserver
self.remoteParticipantObserver = RemoteParticipantObserver(self)
} else {
print("Failed to get call object")
}
}
接聽來電
若要接聽來電，請實 IncomingCallHandler 作 來顯示來電橫幅，以便接聽或拒絕通話。 將下列實作放在 IncomingCallHandler.swift中。
final class IncomingCallHandler: NSObject, CallAgentDelegate, IncomingCallDelegate {
public var contentView: ContentView?
private var incomingCall: IncomingCall?
private static var instance: IncomingCallHandler?
static func getOrCreateInstance() -> IncomingCallHandler {
if let c = instance {
return c
}
instance = IncomingCallHandler()
return instance!
}
private override init() {}
public func callAgent(_ callAgent: CallAgent, didRecieveIncomingCall incomingCall: IncomingCall) {
self.incomingCall = incomingCall
self.incomingCall?.delegate = self
contentView?.showIncomingCallBanner(self.incomingCall!)
}
public func callAgent(_ callAgent: CallAgent, didUpdateCalls args: CallsUpdatedEventArgs) {
if let removedCall = args.removedCalls.first {
contentView?.callRemoved(removedCall)
self.incomingCall = nil
}
}
}
我們需要將下列程式代碼新增至 onAppear 中的ContentView.swift回呼，以建立 的實例IncomingCallHandler：
let incomingCallHandler = IncomingCallHandler.getOrCreateInstance()
incomingCallHandler.contentView = self
在成功建立 CallAgent 之後，將委派設定為 CallAgent：
self.callAgent!.delegate = incomingCallHandler
一旦有連入呼叫，就會 IncomingCallHandler 呼叫 函式 showIncomingCallBanner 來顯示 answer 和 decline 按鈕。
func showIncomingCallBanner(_ incomingCall: IncomingCall?) {
isIncomingCall = true
self.incomingCall = incomingCall
}
附加至 answer 和 decline 的動作會實作為下列程序代碼。 若要使用視訊接聽通話，我們需要開啟本機視訊，並使用 來設定 的選項AcceptCallOptionslocalVideoStream。
func answerIncomingCall() {
isIncomingCall = false
let options = AcceptCallOptions()
if (self.incomingCall != nil) {
guard let deviceManager = deviceManager else {
return
}
if (self.localVideoStream == nil) {
self.localVideoStream = [LocalVideoStream]()
}
if(sendingVideo)
{
let camera = deviceManager.cameras.first
localVideoStream!.append(LocalVideoStream(camera: camera!))
let videoOptions = VideoOptions(localVideoStreams: localVideoStream!)
options.videoOptions = videoOptions
}
self.incomingCall!.accept(options: options) { (call, error) in
setCallAndObserver(call: call, error: error)
}
}
}
func declineIncomingCall() {
self.incomingCall!.reject { (error) in }
isIncomingCall = false
}
遠端參與者影片串流
我們可以建立類別 RemoteVideoStreamData 來處理遠程參與者的轉譯視訊串流。
public class RemoteVideoStreamData : NSObject, RendererDelegate {
public func videoStreamRenderer(didFailToStart renderer: VideoStreamRenderer) {
owner.errorMessage = "Renderer failed to start"
}
private var owner:ContentView
let stream:RemoteVideoStream
var renderer:VideoStreamRenderer? {
didSet {
if renderer != nil {
renderer!.delegate = self
}
}
}
var views:[RendererView] = []
init(view:ContentView, stream:RemoteVideoStream) {
owner = view
self.stream = stream
}
public func videoStreamRenderer(didRenderFirstFrame renderer: VideoStreamRenderer) {
let size:StreamSize = renderer.size
owner.remoteVideoSize = String(size.width) + " X " + String(size.height)
}
}
訂閱事件
我們可以實作 類別 CallObserver ，以訂閱呼叫期間值變更時要通知的事件集合。
public class CallObserver: NSObject, CallDelegate, IncomingCallDelegate {
private var owner: ContentView
init(_ view:ContentView) {
owner = view
}
public func call(_ call: Call, didChangeState args: PropertyChangedEventArgs) {
if(call.state == CallState.connected) {
initialCallParticipant()
}
}
// render remote video streams when remote participant changes
public func call(_ call: Call, didUpdateRemoteParticipant args: ParticipantsUpdatedEventArgs) {
for participant in args.addedParticipants {
participant.delegate = owner.remoteParticipantObserver
for stream in participant.videoStreams {
if !owner.remoteVideoStreamData.isEmpty {
return
}
let data:RemoteVideoStreamData = RemoteVideoStreamData(view: owner, stream: stream)
let scalingMode = ScalingMode.fit
data.renderer = try! VideoStreamRenderer(remoteVideoStream: stream)
let view:RendererView = try! data.renderer!.createView(withOptions: CreateViewOptions(scalingMode:scalingMode))
data.views.append(view)
self.owner.remoteViews.append(view)
owner.remoteVideoStreamData[stream.id] = data
}
owner.remoteParticipant = participant
}
}
// Handle remote video streams when the call is connected
public func initialCallParticipant() {
for participant in owner.call!.remoteParticipants {
participant.delegate = owner.remoteParticipantObserver
for stream in participant.videoStreams {
renderRemoteStream(stream)
}
owner.remoteParticipant = participant
}
}
//create render for RemoteVideoStream and attach it to view
public func renderRemoteStream(_ stream: RemoteVideoStream!) {
if !owner.remoteVideoStreamData.isEmpty {
return
}
let data:RemoteVideoStreamData = RemoteVideoStreamData(view: owner, stream: stream)
let scalingMode = ScalingMode.fit
data.renderer = try! VideoStreamRenderer(remoteVideoStream: stream)
let view:RendererView = try! data.renderer!.createView(withOptions: CreateViewOptions(scalingMode:scalingMode))
self.owner.remoteViews.append(view)
owner.remoteVideoStreamData[stream.id] = data
}
}
遠端參與者管理
所有遠端參與者都會以 RemoteParticipant 型別表示，而且可透過 remoteParticipants 呼叫實例上的集合取得。
我們可以實作 類別 RemoteParticipantObserver ，以訂閱遠端參與者遠端視訊串流上的更新。
public class RemoteParticipantObserver : NSObject, RemoteParticipantDelegate {
private var owner:ContentView
init(_ view:ContentView) {
owner = view
}
public func renderRemoteStream(_ stream: RemoteVideoStream!) {
let data:RemoteVideoStreamData = RemoteVideoStreamData(view: owner, stream: stream)
let scalingMode = ScalingMode.fit
data.renderer = try! VideoStreamRenderer(remoteVideoStream: stream)
let view:RendererView = try! data.renderer!.createView(withOptions: CreateViewOptions(scalingMode:scalingMode))
self.owner.remoteViews.append(view)
owner.remoteVideoStreamData[stream.id] = data
}
// render RemoteVideoStream when remote participant turns on the video, dispose the renderer when remote video is off
public func remoteParticipant(_ remoteParticipant: RemoteParticipant, didUpdateVideoStreams args: RemoteVideoStreamsEventArgs) {
for stream in args.addedRemoteVideoStreams {
renderRemoteStream(stream)
}
for stream in args.removedRemoteVideoStreams {
for data in owner.remoteVideoStreamData.values {
data.renderer?.dispose()
}
owner.remoteViews.removeAll()
}
}
}
執行程式碼
您可以選取 [產品 > 執行] 或使用 [⌘-R] 鍵盤快捷方式，在 iOS 模擬器上建置並執行您的應用程式。
在本快速入門中，您將瞭解如何使用適用於 Windows 的 Azure 通訊服務 呼叫 SDK 來啟動 1：1 視訊通話。
UWP 範例程序代碼
必要條件
若要完成本教學課程，您需要下列必要條件：
具有有效訂用帳戶的 Azure 帳戶。 免費建立帳戶。
已部署的通訊服務資源。 建立通訊服務資源。 您必須記錄本快速入門的 連接字串。
Azure 通訊服務的使用者存取令牌。 您也可以使用 Azure CLI，搭配您的 連接字串 執行 命令，以建立使用者和存取令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"如需詳細資訊，請參閱 使用 Azure CLI 建立和管理存取令牌。
設定
建立專案
在 Visual Studio 中，使用空白應用程式 （通用 Windows） 範本建立新專案，以設定單頁 通用 Windows 平台 （UWP） 應用程式。
Install the package
以滑鼠右鍵按下您的專案，然後移至 Manage Nuget Packages 安裝 Azure.Communication.Calling.WindowsClient1.2.0-beta.1 或更高版本。 請確定已核取 [包含預先發行]。
要求存取
移至 ， Package.appxmanifest 然後按下 Capabilities。
檢查 Internet (Client & Server) 以取得因特網的輸入和輸出存取權。
檢查 Microphone 以存取麥克風的音訊摘要。
檢查 WebCam 以存取裝置的相機。
以滑鼠右鍵按鍵按下列程式代碼[檢視》，將下列程式代碼新增至您的 Package.appxmanifest 。
<Extensions>
<Extension Category="windows.activatableClass.inProcessServer">
<InProcessServer>
<Path>RtmMvrUap.dll</Path>
<ActivatableClass ActivatableClassId="VideoN.VideoSchemeHandler" ThreadingModel="both" />
</InProcessServer>
</Extension>
</Extensions>
設定應用程式架構
我們需要設定基本版面配置來附加邏輯。 若要撥打輸出通話，我們需要 提供 TextBox 被呼叫者的使用者標識碼。 我們也需要按鈕 Start Call 和 Hang Up 按鈕。
我們也需要預覽本機影片，並轉譯其他參與者的遠端視訊。 因此，我們需要兩個元素來顯示視訊串流。
MainPage.xaml開啟專案的 ，並將內容取代為下列實作。
<Page
x:Class="CallingQuickstart.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:CallingQuickstart"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid x:Name="MainGrid" HorizontalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="200*"/>
<RowDefinition Height="60*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" x:Name="AppTitleBar" Background="LightSeaGreen">
<!-- Width of the padding columns is set in LayoutMetricsChanged handler. -->
<!-- Using padding columns instead of Margin ensures that the background paints the area under the caption control buttons (for transparent buttons). -->
<TextBlock x:Name="QuickstartTitle" Text="Calling Quickstart sample title bar" Style="{StaticResource CaptionTextBlockStyle}" Padding="4,4,0,0"/>
</Grid>
<TextBox Grid.Row="1" x:Name="CalleeTextBox" PlaceholderText="Who would you like to call?" TextWrapping="Wrap" VerticalAlignment="Center" />
<Grid Grid.Row="2" Background="LightGray">
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<MediaPlayerElement x:Name="LocalVideo" HorizontalAlignment="Center" Stretch="UniformToFill" Grid.Column="0" VerticalAlignment="Center" AutoPlay="True" />
<MediaPlayerElement x:Name="RemoteVideo" HorizontalAlignment="Center" Stretch="UniformToFill" Grid.Column="1" VerticalAlignment="Center" AutoPlay="True" />
</Grid>
<StackPanel Grid.Row="3" Orientation="Vertical" Grid.RowSpan="2">
<StackPanel Orientation="Horizontal" Margin="10">
<TextBlock VerticalAlignment="Center">Cameras:</TextBlock>
<ComboBox x:Name="CameraList" HorizontalAlignment="Left" Grid.Column="0" DisplayMemberPath="Name" SelectionChanged="CameraList_SelectionChanged" Margin="10"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="CallButton" Content="Start/Join call" Click="CallButton_Click" VerticalAlignment="Center" Margin="10,0,0,0" Height="40" Width="123"/>
<Button x:Name="HangupButton" Content="Hang up" Click="HangupButton_Click" VerticalAlignment="Center" Margin="10,0,0,0" Height="40" Width="123"/>
<CheckBox x:Name="MuteLocal" Content="Mute" Margin="10,0,0,0" Click="MuteLocal_Click" Width="74"/>
<CheckBox x:Name="BackgroundBlur" Content="Background blur" Width="142" Margin="10,0,0,0" Click="BackgroundBlur_Click"/>
</StackPanel>
</StackPanel>
<TextBox Grid.Row="4" x:Name="Stats" Text="" TextWrapping="Wrap" VerticalAlignment="Center" Height="30" Margin="0,2,0,0" BorderThickness="2" IsReadOnly="True" Foreground="LightSlateGray" />
</Grid>
</Page>
開啟 至 App.xaml.cs （以滑鼠右鍵按下並選擇 [檢視程式代碼]，並將這一行新增至頂端：
using CallingQuickstart;
MainPage.xaml.cs 開啟 [右鍵]，然後選擇 [檢視程序代碼]，並以下列實作取代內容：
using Azure.Communication.Calling.WindowsClient;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Core;
using Windows.Media.Core;
using Windows.Networking.PushNotifications;
using Windows.UI;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
namespace CallingQuickstart
{
public sealed partial class MainPage : Page
{
private const string authToken = "<Azure Communication Services auth token>";
private CallClient callClient;
private CallTokenRefreshOptions callTokenRefreshOptions;
private CallAgent callAgent;
private CommunicationCall call = null;
private LocalOutgoingAudioStream micStream;
private LocalOutgoingVideoStream cameraStream;
#region Page initialization
public MainPage()
{
this.InitializeComponent();
// Hide default title bar.
var coreTitleBar = CoreApplication.GetCurrentView().TitleBar;
coreTitleBar.ExtendViewIntoTitleBar = true;
QuickstartTitle.Text = $"{Package.Current.DisplayName} - Ready";
Window.Current.SetTitleBar(AppTitleBar);
CallButton.IsEnabled = true;
HangupButton.IsEnabled = !CallButton.IsEnabled;
MuteLocal.IsChecked = MuteLocal.IsEnabled = !CallButton.IsEnabled;
ApplicationView.PreferredLaunchViewSize = new Windows.Foundation.Size(800, 600);
ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.PreferredLaunchViewSize;
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
await InitCallAgentAndDeviceManagerAsync();
base.OnNavigatedTo(e);
}
#endregion
private async Task InitCallAgentAndDeviceManagerAsync()
{
// Initialize call agent and Device Manager
}
private async void Agent_OnIncomingCallAsync(object sender, IncomingCall incomingCall)
{
// Accept an incoming call
}
private async void CallButton_Click(object sender, RoutedEventArgs e)
{
// Start a call with video
}
private async void HangupButton_Click(object sender, RoutedEventArgs e)
{
// End the current call
}
private async void Call_OnStateChangedAsync(object sender, PropertyChangedEventArgs args)
{
var call = sender as CommunicationCall;
if (call != null)
{
var state = call.State;
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
QuickstartTitle.Text = $"{Package.Current.DisplayName} - {state.ToString()}";
Window.Current.SetTitleBar(AppTitleBar);
HangupButton.IsEnabled = state == CallState.Connected || state == CallState.Ringing;
CallButton.IsEnabled = !HangupButton.IsEnabled;
MuteLocal.IsEnabled = !CallButton.IsEnabled;
});
switch (state)
{
case CallState.Connected:
{
break;
}
case CallState.Disconnected:
{
break;
}
default: break;
}
}
}
private async void CameraList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// Handle camera selection
}
}
}
物件模型
下列類別和介面會處理 Azure 通訊服務 呼叫 SDK 的一些主要功能：
| 名稱 | 描述 |
|---|---|
CallClient |
CallClient是呼叫客戶端連結庫的主要進入點。 |
CallAgent |
CallAgent用來啟動和聯結呼叫。 |
CommunicationCall |
CommunicationCall用來管理已放置或聯結的呼叫。 |
CallTokenCredential |
CallTokenCredential會當做權杖認證來具現化 CallAgent。 |
CommunicationUserIdentifier |
CommunicationUserIdentifier用來表示使用者的身分識別，它可以是下列其中一個選項：CommunicationUserIdentifier、 PhoneNumberIdentifier 或 CallingApplication。 |
驗證用戶端
若要初始化 CallAgent，您需要使用者存取令牌。 一般而言，此令牌是從具有應用程式特定驗證的服務產生。 如需使用者存取令牌的詳細資訊，請參閱 使用者存取令牌 指南。
針對快速入門，請將 取代 <AUTHENTICATION_TOKEN> 為您 Azure 通訊服務資源產生的使用者存取令牌。
一旦您有令牌，請使用令牌初始化 CallAgent 實例，以讓我們進行和接收呼叫。 為了存取裝置上的相機，我們也需要取得 裝置管理員 實例。
將下列程式代碼新增至 函 InitCallAgentAndDeviceManagerAsync 式。
this.callClient = new CallClient(new CallClientOptions() {
Diagnostics = new CallDiagnosticsOptions() {
AppName = "CallingQuickstart",
AppVersion="1.0",
Tags = new[] { "Calling", "ACS", "Windows" }
}
});
// Set up local video stream using the first camera enumerated
var deviceManager = await this.callClient.GetDeviceManagerAsync();
var camera = deviceManager?.Cameras?.FirstOrDefault();
var mic = deviceManager?.Microphones?.FirstOrDefault();
micStream = new LocalOutgoingAudioStream();
CameraList.ItemsSource = deviceManager.Cameras.ToList();
if (camera != null)
{
CameraList.SelectedIndex = 0;
}
callTokenRefreshOptions = new CallTokenRefreshOptions(false);
callTokenRefreshOptions.TokenRefreshRequested += OnTokenRefreshRequestedAsync;
var tokenCredential = new CallTokenCredential(authToken, callTokenRefreshOptions);
var callAgentOptions = new CallAgentOptions()
{
DisplayName = "Contoso",
//https://github.com/lukes/ISO-3166-Countries-with-Regional-Codes/blob/master/all/all.csv
EmergencyCallOptions = new EmergencyCallOptions() { CountryCode = "840" }
};
try
{
this.callAgent = await this.callClient.CreateCallAgentAsync(tokenCredential, callAgentOptions);
//await this.callAgent.RegisterForPushNotificationAsync(await this.RegisterWNS());
this.callAgent.CallsUpdated += OnCallsUpdatedAsync;
this.callAgent.IncomingCallReceived += OnIncomingCallAsync;
}
catch(Exception ex)
{
if (ex.HResult == -2147024809)
{
// E_INVALIDARG
// Handle possible invalid token
}
}
使用視訊開始通話
將 實作新增至 CallButton_Click ，以使用視訊開始通話。 我們需要使用設備管理器實例列舉相機，並建構 LocalOutgoingVideoStream。 我們需要使用 來設定 VideoOptionsLocalVideoStream ，並將它傳遞給 ， startCallOptions 以設定呼叫的初始選項。 藉 LocalOutgoingVideoStream 由附加至 MediaElement，我們可以看到本機影片的預覽。
var callString = CalleeTextBox.Text.Trim();
if (!string.IsNullOrEmpty(callString))
{
if (callString.StartsWith("8:")) // 1:1 Azure Communication Services call
{
call = await StartAcsCallAsync(callString);
}
else if (callString.StartsWith("+")) // 1:1 phone call
{
call = await StartPhoneCallAsync(callString, "+12133947338");
}
else if (Guid.TryParse(callString, out Guid groupId))// Join group call by group guid
{
call = await JoinGroupCallByIdAsync(groupId);
}
else if (Uri.TryCreate(callString, UriKind.Absolute, out Uri teamsMeetinglink)) //Teams meeting link
{
call = await JoinTeamsMeetingByLinkAsync(teamsMeetinglink);
}
}
if (call != null)
{
call.RemoteParticipantsUpdated += OnRemoteParticipantsUpdatedAsync;
call.StateChanged += OnStateChangedAsync;
}
新增方法來啟動或加入不同類型的通話（1：1 Azure 通訊服務 通話、1：1 通話、Azure 通訊服務 群組通話、Teams 會議加入等）。
private async Task<CommunicationCall> StartAcsCallAsync(string acsCallee)
{
var options = await GetStartCallOptionsAsynnc();
var call = await this.callAgent.StartCallAsync( new [] { new UserCallIdentifier(acsCallee) }, options);
return call;
}
private async Task<CommunicationCall> StartPhoneCallAsync(string acsCallee, string alternateCallerId)
{
var options = await GetStartCallOptionsAsynnc();
options.AlternateCallerId = new PhoneNumberCallIdentifier(alternateCallerId);
var call = await this.callAgent.StartCallAsync( new [] { new PhoneNumberCallIdentifier(acsCallee) }, options);
return call;
}
private async Task<CommunicationCall> JoinGroupCallByIdAsync(Guid groupId)
{
var joinCallOptions = await GetJoinCallOptionsAsync();
var groupCallLocator = new GroupCallLocator(groupId);
var call = await this.callAgent.JoinAsync(groupCallLocator, joinCallOptions);
return call;
}
private async Task<CommunicationCall> JoinTeamsMeetingByLinkAsync(Uri teamsCallLink)
{
var joinCallOptions = await GetJoinCallOptionsAsync();
var teamsMeetingLinkLocator = new TeamsMeetingLinkLocator(teamsCallLink.AbsoluteUri);
var call = await callAgent.JoinAsync(teamsMeetingLinkLocator, joinCallOptions);
return call;
}
private async Task<StartCallOptions> GetStartCallOptionsAsynnc()
{
return new StartCallOptions() {
OutgoingAudioOptions = new OutgoingAudioOptions() { IsOutgoingAudioMuted = true, OutgoingAudioStream = micStream },
OutgoingVideoOptions = new OutgoingVideoOptions() { OutgoingVideoStreams = new OutgoingVideoStream[] { cameraStream } }
};
}
private async Task<JoinCallOptions> GetJoinCallOptionsAsync()
{
return new JoinCallOptions() {
OutgoingAudioOptions = new OutgoingAudioOptions() { IsOutgoingAudioMuted = true },
OutgoingVideoOptions = new OutgoingVideoOptions() { OutgoingVideoStreams = new OutgoingVideoStream[] { cameraStream } }
};
}
根據 方法上 CameraList_SelectionChanged 選取的相機，新增程序代碼以建立LocalVideoStream。
var selectedCamerea = CameraList.SelectedItem as VideoDeviceDetails;
cameraStream = new LocalOutgoingVideoStream(selectedCamerea);
var localUri = await cameraStream.StartPreviewAsync();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
LocalVideo.Source = MediaSource.CreateFromUri(localUri);
});
if (call != null)
{
await call?.StartVideoAsync(cameraStream);
}
接受來電
將 實作新增至 OnIncomingCallAsync ，以接聽有視訊的來電，將 傳遞 LocalVideoStream 至 acceptCallOptions。
var incomingCall = args.IncomingCall;
var acceptCallOptions = new AcceptCallOptions() {
IncomingVideoOptions = new IncomingVideoOptions()
{
IncomingVideoStreamKind = VideoStreamKind.RemoteIncoming
}
};
_ = await incomingCall.AcceptAsync(acceptCallOptions);
遠端參與者和遠端視訊串流
所有遠端參與者都可透過 RemoteParticipants 呼叫實例上的集合取得。 呼叫連線之後，我們可以存取通話的遠端參與者，並處理遠端視訊串流。
private async void Call_OnVideoStreamsUpdatedAsync(object sender, RemoteVideoStreamsEventArgs args)
{
foreach (var remoteVideoStream in args.AddedRemoteVideoStreams)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () =>
{
RemoteVideo.Source = await remoteVideoStream.Start();
});
}
foreach (var remoteVideoStream in args.RemovedRemoteVideoStreams)
{
remoteVideoStream.Stop();
}
}
private async void Agent_OnCallsUpdatedAsync(object sender, CallsUpdatedEventArgs args)
{
var removedParticipants = new List<RemoteParticipant>();
var addedParticipants = new List<RemoteParticipant>();
foreach(var call in args.RemovedCalls)
{
removedParticipants.AddRange(call.RemoteParticipants.ToList<RemoteParticipant>());
}
foreach (var call in args.AddedCalls)
{
addedParticipants.AddRange(call.RemoteParticipants.ToList<RemoteParticipant>());
}
await OnParticipantChangedAsync(removedParticipants, addedParticipants);
}
private async Task OnParticipantChangedAsync(IEnumerable<RemoteParticipant> removedParticipants, IEnumerable<RemoteParticipant> addedParticipants)
{
foreach (var participant in removedParticipants)
{
foreach(var incomingVideoStream in participant.IncomingVideoStreams)
{
var remoteVideoStream = incomingVideoStream as RemoteIncomingVideoStream;
if (remoteVideoStream != null)
{
await remoteVideoStream.StopPreviewAsync();
}
}
participant.VideoStreamStateChanged -= OnVideoStreamStateChanged;
}
foreach (var participant in addedParticipants)
{
participant.VideoStreamStateChanged += OnVideoStreamStateChanged;
}
}
private void OnVideoStreamStateChanged(object sender, VideoStreamStateChangedEventArgs e)
{
CallVideoStream callVideoStream = e.CallVideoStream;
switch (callVideoStream.StreamDirection)
{
case StreamDirection.Outgoing:
OnOutgoingVideoStreamStateChanged(callVideoStream as OutgoingVideoStream);
break;
case StreamDirection.Incoming:
OnIncomingVideoStreamStateChanged(callVideoStream as IncomingVideoStream);
break;
}
}
private async void OnIncomingVideoStreamStateChanged(IncomingVideoStream incomingVideoStream)
{
switch (incomingVideoStream.State)
{
case VideoStreamState.Available:
{
switch (incomingVideoStream.Kind)
{
case VideoStreamKind.RemoteIncoming:
var remoteVideoStream = incomingVideoStream as RemoteIncomingVideoStream;
var uri = await remoteVideoStream.StartPreviewAsync();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
RemoteVideo.Source = MediaSource.CreateFromUri(uri);
});
break;
case VideoStreamKind.RawIncoming:
break;
}
break;
}
case VideoStreamState.Started:
break;
case VideoStreamState.Stopping:
break;
case VideoStreamState.Stopped:
if (incomingVideoStream.Kind == VideoStreamKind.RemoteIncoming)
{
var remoteVideoStream = incomingVideoStream as RemoteIncomingVideoStream;
await remoteVideoStream.StopPreviewAsync();
}
break;
case VideoStreamState.NotAvailable:
break;
}
}
轉譯遠端影片
針對每個遠端視訊串流，將它附加至 MediaElement。
private async Task AddVideoStreamsAsync(IReadOnlyList<RemoteVideoStream> remoteVideoStreams)
{
foreach (var remoteVideoStream in remoteVideoStreams)
{
var remoteUri = await remoteVideoStream.Start();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
RemoteVideo.Source = remoteUri;
RemoteVideo.Play();
});
}
}
呼叫狀態更新
當通話中斷連線並處理遠端參與者一開始加入通話時，我們需要清除視訊轉譯器。
private async void Call_OnStateChanged(object sender, PropertyChangedEventArgs args)
{
switch (((Call)sender).State)
{
case CallState.Disconnected:
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
LocalVideo.Source = null;
RemoteVideo.Source = null;
});
break;
case CallState.Connected:
foreach (var remoteParticipant in call.RemoteParticipants)
{
String remoteParticipantMRI = remoteParticipant.Identifier.ToString();
remoteParticipantDictionary.TryAdd(remoteParticipantMRI, remoteParticipant);
await AddVideoStreams(remoteParticipant.VideoStreams);
remoteParticipant.OnVideoStreamsUpdated += Call_OnVideoStreamsUpdated;
}
break;
default:
break;
}
}
結束通話
按兩下按鈕時 Hang Up 結束目前的呼叫。 將實作新增至 HangupButton_Click，以結束呼叫我們建立的 callAgent，然後卸除參與者更新和呼叫狀態事件處理程式。
var call = this.callAgent?.Calls?.FirstOrDefault();
if (call != null)
{
try
{
await call.HangUpAsync(new HangUpOptions() { ForEveryone = true });
}
catch(Exception ex)
{
}
}
執行程式碼
您可以在 Visual Studio 上建置並執行程式代碼。 針對解決方案平台，我們支援 ARM64、 x64 和 x86。
您可以在文字欄位中提供使用者識別碼，然後按下 Start Call 按鈕，以進行輸出視訊通話。
注意：通話 8:echo123 會停止視訊串流，因為echo Bot不支持視訊串流。
如需使用者識別碼 （身分識別） 的詳細資訊，請參閱 使用者存取令牌 指南。
WinUI 3 範例程序代碼
必要條件
若要完成本教學課程，您需要下列必要條件：
具有有效訂用帳戶的 Azure 帳戶。 免費建立帳戶。
如何建立 WinUI 3 應用程式的基本瞭解。 建立您的第一個 WinUI 3 （Windows 應用程式 SDK） 專案是一個很好的資源。
已部署的通訊服務資源。 建立通訊服務資源。 您必須記錄本快速入門的 連接字串。
Azure 通訊服務的使用者存取令牌。 您也可以使用 Azure CLI，搭配您的 連接字串 執行 命令，以建立使用者和存取令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"如需詳細資訊，請參閱 使用 Azure CLI 建立和管理存取令牌。
設定
建立專案
在 Visual Studio 中，使用 空白應用程式、已封裝 （Desktop 中的 WinUI 3） 範本建立新專案，以設定單頁 WinUI 3 應用程式。
Install the package
以滑鼠右鍵按下您的項目，然後移至 Manage Nuget Packages 安裝 Azure.Communication.Calling.WindowsClient1.0.0 或更高版本。 請確定已核取 [包含預先發行]。
要求存取
將下列程式代碼新增至 ：app.manifest
<file name="RtmMvrMf.dll">
<activatableClass name="VideoN.VideoSchemeHandler" threadingModel="both" xmlns="urn:schemas-microsoft-com:winrt.v1" />
</file>
設定應用程式架構
我們需要設定基本版面配置來附加邏輯。 若要撥打輸出通話，我們需要 提供 TextBox 被呼叫者的使用者標識碼。 我們也需要按鈕 Start Call 和 Hang Up 按鈕。
我們也需要預覽本機影片，並轉譯其他參與者的遠端視訊。 因此，我們需要兩個元素來顯示視訊串流。
MainWindow.xaml開啟專案的 ，並將內容取代為下列實作。
<Page
x:Class="CallingQuickstart.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:CallingQuickstart"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid x:Name="MainGrid">
<Grid.RowDefinitions>
<RowDefinition Height="32"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="200*"/>
<RowDefinition Height="60*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" x:Name="AppTitleBar" Background="LightSeaGreen">
<!-- Width of the padding columns is set in LayoutMetricsChanged handler. -->
<!-- Using padding columns instead of Margin ensures that the background paints the area under the caption control buttons (for transparent buttons). -->
<TextBlock x:Name="QuickstartTitle" Text="Calling Quickstart sample title bar" Style="{StaticResource CaptionTextBlockStyle}" Padding="4,4,0,0"/>
</Grid>
<TextBox Grid.Row="1" x:Name="CalleeTextBox" PlaceholderText="Who would you like to call?" TextWrapping="Wrap" VerticalAlignment="Center" />
<Grid Grid.Row="2" Background="LightGray">
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<MediaPlayerElement x:Name="LocalVideo" HorizontalAlignment="Center" Stretch="UniformToFill" Grid.Column="0" VerticalAlignment="Center" AutoPlay="True" />
<MediaPlayerElement x:Name="RemoteVideo" HorizontalAlignment="Center" Stretch="UniformToFill" Grid.Column="1" VerticalAlignment="Center" AutoPlay="True" />
</Grid>
<StackPanel Grid.Row="3" Orientation="Vertical" Grid.RowSpan="2">
<StackPanel Orientation="Horizontal" Margin="10">
<TextBlock VerticalAlignment="Center">Cameras:</TextBlock>
<ComboBox x:Name="CameraList" HorizontalAlignment="Left" Grid.Column="0" DisplayMemberPath="Name" SelectionChanged="CameraList_SelectionChanged" Margin="10"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<Button x:Name="CallButton" Content="Start/Join call" Click="CallButton_Click" VerticalAlignment="Center" Margin="10,0,0,0" Height="40" Width="123"/>
<Button x:Name="HangupButton" Content="Hang up" Click="HangupButton_Click" VerticalAlignment="Center" Margin="10,0,0,0" Height="40" Width="123"/>
<CheckBox x:Name="MuteLocal" Content="Mute" Margin="10,0,0,0" Click="MuteLocal_Click" Width="74"/>
<CheckBox x:Name="BackgroundBlur" Content="Background blur" Width="142" Margin="10,0,0,0" Click="BackgroundBlur_Click"/>
</StackPanel>
</StackPanel>
<TextBox Grid.Row="4" x:Name="Stats" Text="" TextWrapping="Wrap" VerticalAlignment="Center" Height="30" Margin="0,2,0,0" BorderThickness="2" IsReadOnly="True" Foreground="LightSlateGray" />
</Grid>
</Page>
開啟 至 App.xaml.cs （以滑鼠右鍵按下並選擇 [檢視程式代碼]，並將這一行新增至頂端：
using CallingQuickstart;
MainWindow.xaml.cs 開啟 [右鍵]，然後選擇 [檢視程序代碼]，並以下列實作取代內容：
using Azure.Communication.Calling.WindowsClient;
using Azure.WinRT.Communication;
using Microsoft.UI.Xaml;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Windows.Media.Core;
namespace CallingQuickstart
{
public sealed partial class MainWindow : Window
{
CallAgent callAgent;
Call call;
DeviceManager deviceManager;
Dictionary<string, RemoteParticipant> remoteParticipantDictionary = new Dictionary<string, RemoteParticipant>();
public MainWindow()
{
this.InitializeComponent();
Task.Run(() => this.InitCallAgentAndDeviceManagerAsync()).Wait();
}
private async Task InitCallAgentAndDeviceManagerAsync()
{
// Initialize call agent and Device Manager
}
private async void Agent_OnIncomingCallAsync(object sender, IncomingCall incomingCall)
{
// Accept an incoming call
}
private async void CallButton_Click(object sender, RoutedEventArgs e)
{
// Start a call with video
}
private async void HangupButton_Click(object sender, RoutedEventArgs e)
{
// End the current call
}
private async void Call_OnStateChangedAsync(object sender, PropertyChangedEventArgs args)
{
var state = (sender as Call)?.State;
this.DispatcherQueue.TryEnqueue(() => {
State.Text = state.ToString();
});
}
}
}
物件模型
下列類別和介面會處理 Azure 通訊服務 呼叫 SDK 的一些主要功能：
| 名稱 | 描述 |
|---|---|
CallClient |
CallClient是呼叫客戶端連結庫的主要進入點。 |
CallAgent |
CallAgent用來啟動和聯結呼叫。 |
CommunicationCall |
CommunicationCall用來管理已放置或聯結的呼叫。 |
CallTokenCredential |
CallTokenCredential會當做權杖認證來具現化 CallAgent。 |
CommunicationUserIdentifier |
CommunicationUserIdentifier用來表示使用者的身分識別，它可以是下列其中一個選項：CommunicationUserIdentifier、 PhoneNumberIdentifier 或 CallingApplication。 |
驗證用戶端
若要初始化 CallAgent，您需要使用者存取令牌。 一般而言，此令牌是從具有應用程式特定驗證的服務產生。 如需使用者存取令牌的詳細資訊，請參閱 使用者存取令牌 指南。
針對快速入門，請將 取代 <AUTHENTICATION_TOKEN> 為您 Azure 通訊服務資源產生的使用者存取令牌。
一旦您有令牌，請使用它來初始化 CallAgent 實例，這可讓我們進行和接收呼叫。 為了存取裝置上的相機，我們也需要取得 裝置管理員 實例。
將下列程式代碼新增至 函 InitCallAgentAndDeviceManagerAsync 式。
var callClient = new CallClient();
this.deviceManager = await callClient.GetDeviceManagerAsync();
var tokenCredential = new CallTokenCredential("<AUTHENTICATION_TOKEN>");
var callAgentOptions = new CallAgentOptions()
{
DisplayName = "<DISPLAY_NAME>"
};
this.callAgent = await callClient.CreateCallAgentAsync(tokenCredential, callAgentOptions);
this.callAgent.OnCallsUpdated += Agent_OnCallsUpdatedAsync;
this.callAgent.OnIncomingCall += Agent_OnIncomingCallAsync;
使用視訊開始通話
將 實作新增至 CallButton_Click ，以使用視訊開始通話。 我們需要使用設備管理器實例列舉相機，並建構 LocalVideoStream。 我們需要使用 來設定 VideoOptionsLocalVideoStream ，並將它傳遞給 ， startCallOptions 以設定呼叫的初始選項。 藉 LocalVideoStream 由附加至 MediaPlayerElement，我們可以看到本機影片的預覽。
var startCallOptions = new StartCallOptions();
if (this.deviceManager.Cameras?.Count > 0)
{
var videoDeviceInfo = this.deviceManager.Cameras?.FirstOrDefault();
if (videoDeviceInfo != null)
{
var selectedCamerea = CameraList.SelectedItem as VideoDeviceDetails;
cameraStream = new LocalOutgoingVideoStream(selectedCamerea);
var localUri = await cameraStream.StartPreviewAsync();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
LocalVideo.Source = MediaSource.CreateFromUri(localUri);
});
startCallOptions.VideoOptions = new OutgoingVideoOptions(new[] { cameraStream });
}
}
var callees = new ICommunicationIdentifier[1]
{
new CommunicationUserIdentifier(CalleeTextBox.Text.Trim())
};
this.call = await this.callAgent.StartCallAsync(callees, startCallOptions);
this.call.OnRemoteParticipantsUpdated += Call_OnRemoteParticipantsUpdatedAsync;
this.call.OnStateChanged += Call_OnStateChangedAsync;
接受來電
將 實作新增至 Agent_OnIncomingCallAsync ，以接聽有視訊的來電，將 傳遞 LocalVideoStream 至 acceptCallOptions。
var acceptCallOptions = new AcceptCallOptions();
if (this.deviceManager.Cameras?.Count > 0)
{
var videoDeviceInfo = this.deviceManager.Cameras?.FirstOrDefault();
if (videoDeviceInfo != null)
{
var selectedCamerea = CameraList.SelectedItem as VideoDeviceDetails;
cameraStream = new LocalOutgoingVideoStream(selectedCamerea);
var localUri = await cameraStream.StartPreviewAsync();
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
LocalVideo.Source = MediaSource.CreateFromUri(localUri);
});
acceptCallOptions.VideoOptions = new OutgoingVideoOptions(new[] { localVideoStream });
}
}
call = await incomingCall.AcceptAsync(acceptCallOptions);
遠端參與者和遠端視訊串流
所有遠端參與者都可透過 RemoteParticipants 呼叫實例上的集合取得。 呼叫連線之後，我們可以存取通話的遠端參與者，並處理遠端視訊串流。
private async void Call_OnVideoStreamsUpdatedAsync(object sender, RemoteVideoStreamsEventArgs args)
{
foreach (var remoteVideoStream in args.AddedRemoteVideoStreams)
{
this.DispatcherQueue.TryEnqueue(async () => {
RemoteVideo.Source = MediaSource.CreateFromUri(await remoteVideoStream.Start());
RemoteVideo.MediaPlayer.Play();
});
}
foreach (var remoteVideoStream in args.RemovedRemoteVideoStreams)
{
remoteVideoStream.Stop();
}
}
private async void Agent_OnCallsUpdatedAsync(object sender, CallsUpdatedEventArgs args)
{
foreach (var call in args.AddedCalls)
{
foreach (var remoteParticipant in call.RemoteParticipants)
{
var remoteParticipantMRI = remoteParticipant.Identifier.ToString();
this.remoteParticipantDictionary.TryAdd(remoteParticipantMRI, remoteParticipant);
await AddVideoStreamsAsync(remoteParticipant.VideoStreams);
remoteParticipant.OnVideoStreamsUpdated += Call_OnVideoStreamsUpdatedAsync;
}
}
}
private async void Call_OnRemoteParticipantsUpdatedAsync(object sender, ParticipantsUpdatedEventArgs args)
{
foreach (var remoteParticipant in args.AddedParticipants)
{
String remoteParticipantMRI = remoteParticipant.Identifier.ToString();
this.remoteParticipantDictionary.TryAdd(remoteParticipantMRI, remoteParticipant);
await AddVideoStreamsAsync(remoteParticipant.VideoStreams);
remoteParticipant.OnVideoStreamsUpdated += Call_OnVideoStreamsUpdatedAsync;
}
foreach (var remoteParticipant in args.RemovedParticipants)
{
String remoteParticipantMRI = remoteParticipant.Identifier.ToString();
this.remoteParticipantDictionary.Remove(remoteParticipantMRI);
}
}
轉譯遠端影片
針對每個遠端視訊串流，將它附加至 MediaPlayerElement。
private async Task AddVideoStreamsAsync(IReadOnlyList<RemoteVideoStream> remoteVideoStreams)
{
foreach (var remoteVideoStream in remoteVideoStreams)
{
var remoteUri = await remoteVideoStream.Start();
this.DispatcherQueue.TryEnqueue(() => {
RemoteVideo.Source = MediaSource.CreateFromUri(remoteUri);
RemoteVideo.MediaPlayer.Play();
});
}
}
呼叫狀態更新
當通話中斷連線並處理遠端參與者一開始加入通話時，我們需要清除視訊轉譯器。
private async void Call_OnStateChanged(object sender, PropertyChangedEventArgs args)
{
switch (((Call)sender).State)
{
case CallState.Disconnected:
this.DispatcherQueue.TryEnqueue(() => { =>
{
LocalVideo.Source = null;
RemoteVideo.Source = null;
});
break;
case CallState.Connected:
foreach (var remoteParticipant in call.RemoteParticipants)
{
String remoteParticipantMRI = remoteParticipant.Identifier.ToString();
remoteParticipantDictionary.TryAdd(remoteParticipantMRI, remoteParticipant);
await AddVideoStreams(remoteParticipant.VideoStreams);
remoteParticipant.OnVideoStreamsUpdated += Call_OnVideoStreamsUpdated;
}
break;
default:
break;
}
}
結束通話
按兩下按鈕時 Hang Up 結束目前的呼叫。 將實作新增至 HangupButton_Click，以結束呼叫我們建立的 callAgent，然後卸除參與者更新和呼叫狀態事件處理程式。
this.call.OnRemoteParticipantsUpdated -= Call_OnRemoteParticipantsUpdatedAsync;
this.call.OnStateChanged -= Call_OnStateChangedAsync;
await this.call.HangUpAsync(new HangUpOptions());
執行程式碼
您可以在 Visual Studio 上建置並執行程式代碼。 針對解決方案平台，我們支援 ARM64、 x64 和 x86。
您可以在文字欄位中提供使用者識別碼，然後按下 Start Call 按鈕，以進行輸出視訊通話。
注意：通話 8:echo123 會停止視訊串流，因為echo Bot不支持視訊串流。
如需使用者識別碼 （身分識別） 的詳細資訊，請參閱 使用者存取令牌 指南。
在本快速入門中，您將瞭解如何使用 Azure 通訊服務 呼叫 SDK for Unity 來啟動呼叫。 如需在 Unity 平臺上接收和轉譯視訊畫面，請參閱 原始媒體存取快速入門。
必要條件
若要完成本教學課程，您需要下列必要條件：
具有有效訂用帳戶的 Azure 帳戶。 免費建立帳戶。
已部署的通訊服務資源。 建立通訊服務資源。 您必須記錄本快速入門的 連接字串。
Azure 通訊服務的使用者存取令牌。 您也可以使用 Azure CLI，搭配 連接字串 執行 命令，以建立使用者和存取令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"如需詳細資訊，請參閱 使用 Azure CLI 建立和管理存取令牌。
設定
建立專案
在 Unity 中樞中，使用 2D 核心 範本建立新專案，以設定 Unity 專案。
Install the package
有兩種方式可以安裝適用於 Unity 的 Azure 通訊通話 SDK。
從公用 npm 摘要下載 SDK，並將其匯入 Unity 編輯器的套件管理員，其位於 Windows 索引卷標底下。
從 Microsoft 下載混合實境功能工具，並透過混合實境工具管理員進行安裝。
設定應用程式架構
我們需要設定基本版面配置來附加邏輯。 若要撥打輸出通話，我們需要 提供 TextBox 被呼叫者的使用者標識碼。 我們也需要按鈕 Start/Join call 和 Hang up 按鈕。
在您的專案中建立名為 Main 的新場景。
開啟 檔案， Main.unity 並以下列實作取代內容：
Main.Unity 程式代碼
Main.unity
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建立名為 AppManager.cs 的腳本，並將其連結至 Unity 編輯器中的 AppManager 物件。 將內容取代為下列實作：
using Azure.Communication.Calling.UnityClient;
using System.Runtime.InteropServices.ComTypes;
using System;
using UnityEngine;
using System.Linq;
using UnityEngine.UI;
using TMPro;
/// <summary>
/// A singleton which hosts an Azure Communication calling client. This calling client
/// is then shared across the application.
/// </summary>
public class AppManager : MonoBehaviour
{
private CallClient callClient;
private CallAgent callAgent;
private DeviceManager deviceManager;
private Call call;
private LocalOutgoingAudioStream micStream;
private LocalVideoStream cameraStream;
public string CalleeIdentity { get; set; }
public TMP_Text callStatus;
public static AppManager Instance;
private void Awake()
{
// start of new code
if (Instance != null)
{
Destroy(gameObject);
return;
}
// end of new code
callClient = new CallClient();
Instance = this;
DontDestroyOnLoad(gameObject);
InitCallAgentAndDeviceManagerAsync();
}
public async void CallButton_Click()
{
// Start a call
}
public async void HangupButton_Click()
{
// Hang up a call
}
#region API event handlers
private async void OnIncomingCallAsync(object sender, IncomingCallReceivedEventArgs args)
{
// Handle incoming call event
}
private async void OnStateChangedAsync(object sender, PropertyChangedEventArgs args)
{
// Handle connected and disconnected state change of a call
}
private async void OnRemoteParticipantsUpdatedAsync(object sender, ParticipantsUpdatedEventArgs args)
{
// Handle remote participant arrival or departure events and subscribe to individual participant's VideoStreamStateChanged event
}
private void OnVideoStreamStateChanged(object sender, VideoStreamStateChangedEventArgs e)
{
// Handle incoming or outgoing video stream change events
}
private async void OnIncomingVideoStreamStateChangedAsync(IncomingVideoStream incomingVideoStream)
{
// Handle incoming IncomingVideoStreamStateChanged event and process individual VideoStreamState
}
#endregion
//Used For Updating the UI
private void Update()
{
if (call != null)
{
switch (call.State)
{
case CallState.Connected:
if (callStatus.text != "Connected")
callStatus.text = "Connected";
break;
case CallState.Disconnected:
if (callStatus.text != "Disconnected")
callStatus.text = "Disconnected";
break;
}
}
}
}
在名為 AppManager 的 GameObject 中，將新建立的腳本拖曳到其腳本元件中。 將 [狀態] 文字物件拖曳至 [通話狀態] 文字欄位，以啟用通話狀態的 UI 更新。 SDK 透過 URI 提供影片，但目前 Unity 的視訊播放程式可能不支援 URI 播放。
物件模型
下表列出類別和介面會處理 Azure 通訊服務 呼叫 SDK 的一些主要功能：
| 名稱 | 描述 |
|---|---|
CallClient |
CallClient是呼叫 SDK 的主要進入點。 |
CallAgent |
CallAgent用來啟動和管理話務。 |
Call |
CommunicationCall用來管理進行中的呼叫。 |
CallTokenCredential |
CallTokenCredential會當做權杖認證來具現化 CallAgent。 |
CallIdentifier |
CallIdentifier用來代表使用者的身分識別，它可以是下列其中一個選項：UserCallIdentifier、 PhoneNumberCallIdentifier 等等。 |
驗證用戶端
使用 CallAgent 使用者存取令牌初始化實例，以讓我們進行和接收呼叫，並選擇性地取得 DeviceManager 實例來查詢用戶端裝置組態。
在程式代碼中，將 取代 <AUTHENTICATION_TOKEN> 為使用者存取令牌。 如果您還沒有可用的令牌，請參閱使用者存取令牌檔。
新增 InitCallAgentAndDeviceManagerAsync 函式，以啟動 SDK。 您可以自定義此協助程式，以符合應用程式的需求。
private async void InitCallAgentAndDeviceManagerAsync()
{
deviceManager = await callClient.GetDeviceManager();
var tokenCredential = new CallTokenCredential(<AUTHENTICATION_TOKEN>);
var callAgentOptions = new CallAgentOptions()
{
DisplayName = $"{Environment.MachineName}/{Environment.UserName}",
};
callAgent = await callClient.CreateCallAgent(tokenCredential, callAgentOptions);
callAgent.IncomingCallReceived += OnIncomingCallAsync;
}
使用視訊開始通話
StartCallOptions取得 物件之後，CallAgent即可用來起始 Azure 通訊服務 呼叫：
public async void CallButton_Click()
{
var startCallOptions = new StartCallOptions();
startCallOptions = new StartCallOptions()
{
OutgoingVideoOptions = new OutgoingVideoOptions() { Streams = new OutgoingVideoStream[] { cameraStream } }
};
var callee = new UserCallIdentifier(CalleeIdentity);
call = await callAgent.StartCallAsync(new CallIdentifier[] { callee }, startCallOptions);
// Set up handler for remote participant updated events, such as VideoStreamStateChanged event
call.RemoteParticipantsUpdated += OnRemoteParticipantsUpdatedAsync;
// Set up handler for call StateChanged event
call.StateChanged += OnStateChangedAsync;
}
處理遠端參與者和遠端傳入影片
傳入視訊與特定遠端參與者相關聯，因此 RemoteParticipantsUpdated 是保持通知並取得變更參與者參考的重要事件。
private void OnRemoteParticipantsUpdatedAsync(object sender, ParticipantsUpdatedEventArgs args)
{
foreach (var participant in args.RemovedParticipants)
{
foreach (var incomingVideoStream in participant.IncomingVideoStreams)
{
var remoteVideoStream = incomingVideoStream as RemoteVideoStream;
if (remoteVideoStream != null)
{
remoteVideoStream.Stop();
}
}
// Tear down the event handler on the departing participant
participant.VideoStreamStateChanged -= OnVideoStreamStateChanged;
}
foreach (var participant in args.AddedParticipants)
{
// Set up handler for VideoStreamStateChanged of the participant who just joined the call
participant.VideoStreamStateChanged += OnVideoStreamStateChanged;
}
}
所有遠端參與者都可透過 RemoteParticipants 呼叫實例上的集合取得。 呼叫連線之後，我們可以存取通話的遠端參與者，並處理遠端視訊串流。
private void OnVideoStreamStateChanged(object sender, VideoStreamStateChangedEventArgs e)
{
CallVideoStream callVideoStream = e.Stream;
switch (callVideoStream.Direction)
{
case StreamDirection.Outgoing:
//OnOutgoingVideoStreamStateChanged(callVideoStream as OutgoingVideoStream);
break;
case StreamDirection.Incoming:
OnIncomingVideoStreamStateChangedAsync(callVideoStream as IncomingVideoStream);
break;
}
}
視訊串流會透過一連串的內部狀態傳輸。 VideoStreamState.Available 是將視訊串流系結至UI元素以轉譯視訊數據流的慣用狀態，例如 MediaPlayerElement，通常是 VideoStreamState.Stopped 應該在清除工作，例如停止影片預覽。
private async void OnIncomingVideoStreamStateChangedAsync(IncomingVideoStream incomingVideoStream)
{
switch (incomingVideoStream.State)
{
case VideoStreamState.Available:
switch (incomingVideoStream.Kind)
{
case VideoStreamKind.RemoteIncoming:
var remoteVideoStream = incomingVideoStream as RemoteVideoStream;
var uri = await remoteVideoStream.StartAsync();
break;
case VideoStreamKind.RawIncoming:
break;
}
break;
case VideoStreamState.Started:
break;
case VideoStreamState.Stopping:
case VideoStreamState.Stopped:
if (incomingVideoStream.Kind == VideoStreamKind.RemoteIncoming)
{
var remoteVideoStream = incomingVideoStream as RemoteVideoStream;
remoteVideoStream.Stop();
}
break;
case VideoStreamState.NotAvailable:
break;
}
}
結束通話
按兩下按鈕時 Hang up 結束目前的呼叫。 將實作新增至HangupButton_Click以結束呼叫，並停止預覽和視訊串流。
public async void HangupButton_Click()
{
if (call != null)
{
try
{
await call.HangUpAsync(new HangUpOptions() { ForEveryone = false });
}
catch (Exception ex)
{
}
}
}
接受來電
IncomingCallReceived 事件接收是在 SDK 啟動程式協助程式 InitCallAgentAndDeviceManagerAsync中設定。
callAgent.IncomingCallReceived += OnIncomingCallAsync;
應用程式有機會設定應如何接受來電，例如視訊和音訊串流類型。
private async void OnIncomingCallAsync(object sender, IncomingCallReceivedEventArgs args)
{
var incomingCall = args.IncomingCall;
var acceptCallOptions = new AcceptCallOptions()
{
IncomingVideoOptions = new IncomingVideoOptions()
{
StreamKind = VideoStreamKind.RemoteIncoming
}
};
call = await incomingCall.AcceptAsync(acceptCallOptions);
// Set up handler for remote participant updated events, such as VideoStreamStateChanged event
call.RemoteParticipantsUpdated += OnRemoteParticipantsUpdatedAsync;
// Set up handler for incoming call StateChanged event
call.StateChanged += OnStateChangedAsync;
}
監視和回應呼叫狀態變更事件
StateChanged 當進行中的呼叫交易從某個狀態到另一個狀態時，就會引發物件上的 Call 事件。 應用程式有機會反映 UI 上的狀態變更，或插入商業規則。
private async void OnStateChangedAsync(object sender, PropertyChangedEventArgs args)
{
var call = sender as Call;
if (call != null)
{
var state = call.State;
switch (state)
{
case CallState.Connected:
{
await call.StartAudioAsync(micStream);
break;
}
case CallState.Disconnected:
{
call.RemoteParticipantsUpdated -= OnRemoteParticipantsUpdatedAsync;
call.StateChanged -= OnStateChangedAsync;
call.Dispose();
break;
}
default: break;
}
}
}
執行程式碼
您可以在 Unity 編輯器或使用 Unity 的裝置上建置和執行程式代碼。
您可以在文字欄位中提供使用者識別碼，然後按下 Start Call/Join 按鈕，以進行輸出通話。 呼叫 8:echo123 會使用 Echo Bot 來連線您，這項功能非常適合開始使用並驗證音訊裝置是否正常運作。
清除資源
如果您想要清除並移除通訊服務訂用帳戶，您可以刪除資源或資源群組。 刪除資源群組也會刪除與其相關聯的任何其他資源。 深入瞭解清除 資源。
下一步
如需詳細資訊，請參閱下列文章：