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快速入门：在应用中添加 1:1 视频呼叫
使用 Azure 通信服务呼叫 SDK 向应用添加一对一视频呼叫，开启 Azure 通信服务使用旅程。 你会了解如何使用适用于 JavaScript 的 Azure 通信服务呼叫 SDK 发起和接听视频呼叫。
代码示例
如果你要向前跳转到末尾，可以从 GitHub 下载此快速入门示例。
注意
可以使用 Azure 通信服务 UI 库访问对 Azure 通信服务用户的出站调用。 借助 UI 库，开发人员只需几行代码即可将启用了 VoIP 的呼叫客户端添加到其应用程序中。
先决条件
获取具有有效订阅的 Azure 帐户。 免费创建帐户。
需要有 Node.js 18。 可以使用 msi 安装程序安装它。
创建活动的通信服务资源。 创建通信服务资源。 需要为此快速入门记录连接字符串。
创建用于实例化呼叫客户端的用户访问令牌。 了解如何创建和管理用户访问令牌。 可以使用 Azure CLI，并结合你的连接字符串运行命令来创建用户和访问令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"有关详细信息，请参阅使用 Azure CLI 创建和管理访问令牌。
设置
创建新的 Node.js 应用程序
打开终端或命令窗口，为应用创建一个新目录，并导航到该目录。
mkdir calling-quickstart && cd calling-quickstart
运行 npm init -y 以使用默认设置创建 package.json 文件。
npm init -y
安装包
使用 npm install 命令安装适用于 JavaScript 的 Azure 通信服务通话 SDK。
npm install @azure/communication-common --save
npm install @azure/communication-calling --save
设置应用框架
此快速入门使用 Webpack 捆绑应用程序资产。 运行以下命令以安装 webpack、webpack-cli 和 webpack-dev-server npm 包并在 package.json 中将其列作开发依赖项：
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
代码如下：
在项目的根目录中创建一个 index.html 文件。 我们会使用此文件来配置可让用户发起 1:1 视频呼叫的基本布局。
<!-- 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>
以下类和接口用于处理 Azure 通信服务通话 SDK 的某些主要功能：
| 名称 | 说明 |
|---|---|
CallClient |
通话 SDK 的主入口点。 |
AzureCommunicationTokenCredential |
实现用于实例化 callAgent 的 CommunicationTokenCredential 接口。 |
CallAgent |
用于启动和管理通话。 |
DeviceManager |
用于管理媒体设备。 |
Call |
用于表示通话 |
LocalVideoStream |
用于为本地系统上的相机设备创建本地视频流。 |
RemoteParticipant |
用于表示通话中的远程参与者 |
RemoteVideoStream |
用于表示来自远程参与者的远程视频流。 |
在名为 client.js 的项目的根目录中创建一个文件，以包含此快速入门的应用程序逻辑。 在 index.js 中添加以下代码：
// 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();
});
在项目的根目录中创建一个名为 styles.css 的文件，以包含此快速入门的应用程序样式。 将以下代码添加到 styles.css 文件：
/**
* 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); }
}
添加 webpack 本地服务器代码
在项目根目录中创建一个名为 webpack.config.js 的文件，以包含本快速入门使用的本地服务器逻辑。 在 webpack.config.js 中添加以下代码：
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'
]
}),
]
};
运行代码
使用 webpack-dev-server 生成并运行应用。 运行以下命令，在本地 Web 服务器中捆绑应用程序主机：
npx webpack serve --config webpack.config.js
打开浏览器，在两个选项卡上导航到 http://localhost:8080/.You 后应看到以下屏幕：
在第一个选项卡中输入有效的用户访问令牌，在另一个选项卡中输入另一个不同的有效用户访问令牌。
如果还没有可用的令牌，请参阅用户访问令牌文档。
在两个选项卡上，单击“初始化通话代理”按钮。 应会看到以下屏幕：
第一个选项卡上，输入第二个选项卡的 Azure 通信服务用户标识，然后单击“开始通话”按钮。 第一个选项卡会启动到第二个选项卡的呼出通话，第二个选项卡的“接听通话”按钮将变为启用状态：
在第二个选项卡中，单击“接听通话”按钮后，通话会开始并连接。 应会看到以下屏幕：
现在，两个选项卡已成功连接到 1 对 1 视频通话中。 这两个选项卡都可以听到彼此的音频，并查看彼此的视频流。
通过使用通信服务呼叫客户端库向应用添加视频通话，开启 Azure 通信服务使用旅程。 了解如何添加 1 对 1 视频通话，以及如何创建或加入群组通话。 此外，还可以使用适用于 Android 的 Azure 通信服务通话 SDK 发起、应答和加入视频通话。
若要开始使用示例代码，可以下载示例应用。
先决条件
具有活动订阅的 Azure 帐户。 免费创建帐户。
Android Studio，用于创建 Android 应用程序。
已部署的通信服务资源。 创建通信服务资源。 需要为此快速入门记录连接字符串。
Azure 通信服务的用户访问令牌。 可以使用 Azure CLI，并结合你的连接字符串运行命令来创建用户和访问令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"有关详细信息，请参阅使用 Azure CLI 创建和管理访问令牌。
使用空活动创建 Android 应用
在 Android Studio 中，选择“启动新的 Android Studio 项目”。
在“手机和平板电脑”下，选择“空活动”项目模板。
对于“最低 SDK”，选择“API 26: Android 8.0 (Oreo)”或更高版本。 请参阅 SDK 支持版本。
安装包
找到项目级别 build.gradle，将 mavenCentral() 添加到 buildscript 和 allprojects 下的存储库列表中
buildscript {
repositories {
...
mavenCentral()
...
}
}
allprojects {
repositories {
...
mavenCentral()
...
}
}
然后，在模块级别 build.gradle 中，将以下行添加到 dependencies 和 android 节：
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'
...
}
将权限添加到应用程序清单
若要请求进行呼叫所需的权限，必须首先在应用程序清单 (app/src/main/AndroidManifest.xml) 中声明权限。 请将文件内容替换为以下代码：
<?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>
为应用设置布局
需要一个作为被呼叫方 ID 或群组呼叫 ID 的文本输入、一个用于拨打电话的按钮，以及用于挂断电话的额外按钮。
还需要两个按钮用于打开和关闭本地视频。 需要放置两个容器用于保存本地和远程视频流。 可以通过设计器或通过编辑布局 XML 来添加这些按钮。
转到 app/src/main/res/layout/activity_main.xml，并将文件内容替换为以下代码：
<?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>
创建主活动基架和绑定
创建布局后，可以添加绑定和活动的基本基架。 活动会处理请求运行时权限、创建呼叫代理以及在按下按钮时进行呼叫。
onCreate 方法被替代以调用 getAllPermissions 和 createAgent，并为通话按钮添加绑定。 此事件仅在创建活动时发生一次。 有关 onCreate 的详细信息，请参阅指南了解活动生命周期。
转到 MainActivity.java 文件并将内容替换为以下代码：
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
}
}
在运行时请求权限
对于 Android 6.0 及更高版本（API 级别 23）和 targetSdkVersion 23 或更高版本，在运行时（而不是在安装应用时）授予权限。 为了支持此功能，可以实施 getAllPermissions 以便为每个所需权限调用 ActivityCompat.checkSelfPermission 和 ActivityCompat.requestPermissions。
/**
* 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
设计应用时，请考虑何时应请求这些权限。 应在需要时请求权限，而不是提前请求。 有关详细信息，请参阅 Android 权限指南。
对象模型
以下类和接口用于处理 Azure 通信服务通话 SDK 的某些主要功能：
| 名称 | 说明 |
|---|---|
CallClient |
通话 SDK 的主入口点。 |
CallAgent |
用于启动和管理通话。 |
CommunicationTokenCredential |
用作实例化 CallAgent 的令牌凭据。 |
CommunicationIdentifier |
用作可能是呼叫一部分的不同类型的参与者。 |
从用户访问令牌创建代理
你需要有用户令牌才能创建经过身份验证的呼叫代理。 通常，此令牌从具有特定于应用程序的身份验证的服务生成。 有关用户访问令牌的详细信息，请参阅用户访问令牌。
对于快速入门，请使用为你的 Azure 通信服务资源生成的用户访问令牌替换 <User_Access_Token>。
/**
* 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();
}
}
使用呼叫代理启动视频呼叫
可以使用呼叫代理来拨打电话。 只需提供被呼叫方 ID 和呼叫选项的列表。
若要进行视频呼叫，必须使用 deviceManager getCameras API 枚举本地摄像头。 选择所需的摄像头后，用它构造一个 LocalVideoStream 实例。 将此实例作为 localVideoStream 数组中的项传递给 videoOptions 以传入到呼叫方法。 在通话接通后，它就会自动将来自所选相机的视频流发送给其他参与者。
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);
}
在本快速入门中，你依靠函数 getNextAvailableCamera 来选择通话使用的摄像头。 该函数采用摄像头的枚举作为输入，并循环访问列表以获取下一个可用的摄像头。 如果参数为 null，该函数将选取列表中的第一台设备。 如果选择“开始通话”时没有可用的摄像头，则会改为音频呼叫。 但是，如果远程参与者应答了视频通话，你仍可以看到远程视频流。
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);
}
构造 LocalVideoStream 实例后，可以创建一个呈现器，以在 UI 中显示该实例。
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);
});
}
若要允许用户切换本地视频源，请使用 switchSource。 此方法选取下一个可用的摄像头，并将其定义为本地流。
public void switchSource() {
if (currentVideoStream != null) {
try {
currentCamera = getNextAvailableCamera(currentCamera);
currentVideoStream.switchSource(currentCamera).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
}
接听来电
可以通过在 callAgent 上订阅 addOnIncomingCallListener 来接听来电。
private void handleIncomingCall() {
callAgent.addOnIncomingCallListener((incomingCall) -> {
this.incomingCall = incomingCall;
Executors.newCachedThreadPool().submit(this::answerIncomingCall);
});
}
若要在打开摄像头的情况下接受呼叫，请使用 deviceManager getCameras API 枚举本地摄像头。 选取摄像头并构造 LocalVideoStream 实例。 在对 call 对象调用 accept 方法之前将其传递到 acceptCallOptions。
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);
}
远程参与者和远程视频流
所有远程参与者都可以通过调用实例上的 getRemoteParticipants() 方法获得。 通话状态变为已连接 (CallState.CONNECTED) 后，我们可以访问通话的远程参与者并处理远程视频流。
发起呼叫或应答传入呼叫时，需要订阅 addOnRemoteParticipantsUpdatedListener 事件以处理远程参与者。
remoteParticipantUpdatedListener = this::handleRemoteParticipantsUpdate;
call.addOnRemoteParticipantsUpdatedListener(remoteParticipantUpdatedListener);
使用在同一类中定义的事件侦听器时，请将侦听器绑定到变量。 将变量作为参数传入以添加和删除侦听器方法。
如果尝试直接将侦听器作为参数传入，你会丢失对该侦听器的引用。 Java 创建这些侦听器的新实例，而不是引用以前创建的实例。 无法删除先前的实例，因为你没有对它们的引用。
注意
当用户加入通话时，他们可以通过 getRemoteParticipants() 方法访问当前的远程参与者。 不会为这些现有参与者触发 addOnRemoteParticipantsUpdatedListener 事件。 仅当用户已加入通话且远程参与者加入或离开通话时，才会触发此事件。
远程视频流更新
1 对 1 通话需处理添加的参与者。 删除远程参与者后，通话将结束。 对于添加的参与者，你将订阅 addOnVideoStreamsUpdatedListener 以处理视频流更新。
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();
}
}
呈现远程视频
创建远程视频流的呈现器，并将其附加到视图以开始呈现远程视图。 释放视图可停止呈现远程视图。
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;
}
}
通话状态更新
通话状态可能会从已连接变为断开连接。 呼叫接通后，你将处理远程参与者；呼叫断开后，你将释放 previewRenderer 以停止本地视频。
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);
}
}
结束呼叫
通过调用通话实例上的 hangUp() 函数来结束通话。 释放 previewRenderer 以停止本地视频。
private void hangUp() {
try {
call.hangUp().get();
switchSourceButton.setVisibility(View.INVISIBLE);
} catch (ExecutionException | InterruptedException e) {
e.printStackTrace();
}
if (previewRenderer != null) {
previewRenderer.dispose();
}
}
隐藏和显示本地视频
通话开始后，可以使用 turnOffLocalVideo() 停止本地视频渲染和流式处理，此方法将删除包装本地渲染的视图，并释放当前流。 若要恢复流并再次渲染本地预览，请使用 turnOnLocalVideo()，此方法会显示视频预览并开始流式处理。
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();
}
}
运行代码
你现在可以使用 Android Studio 工具栏上的“运行应用”按钮来启动应用。
| 已完成的应用程序 | 1 对 1 通话 |
|---|---|
|
|
添加群组呼叫功能
现在可更新应用，允许用户在 1 对 1 通话或群组通话之间选择。
更新布局
使用单选按钮来选择 SDK 是创建 1 对 1 通话还是加入群组通话。 单选按钮位于顶部，因此 app/src/main/res/layout/activity_main.xml 的第一部分会以如下方式结束。
<?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
现在可以更新元素和逻辑来决定何时创建 1 对 1 通话以及何时加入群组通话。 代码的第一部分需要更新以添加依赖项、项和其他配置。
依赖项：
import android.widget.RadioButton;
import com.azure.android.communication.calling.GroupCallLocator;
import com.azure.android.communication.calling.JoinCallOptions;
import java.util.UUID;
全局元素：
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);
}
添加 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;
}
}
运行已升级的应用
此时可以使用 Android Studio 工具栏上的“运行应用”按钮来启动应用。
| 屏幕更新 | 组呼叫 |
|---|---|
|
|
使用通信服务通话 SDK 向应用添加一对一视频通话，开启 Azure 通信服务使用旅程。 你会了解如何使用适用于 iOS 的 Azure 通信服务通话 SDK 发起和接听视频通话。
代码示例
如果你要向前跳转到末尾，可以从 GitHub 下载此快速入门示例。
必备条件
获取具有有效订阅的 Azure 帐户。 免费创建帐户。
一部运行 Xcode 的 Mac，以及一个安装到密钥链的有效开发人员证书。
创建活动的通信服务资源。 创建通信服务资源。 需要为此快速入门记录连接字符串。
Azure 通信服务的用户访问令牌。 可以使用 Azure CLI，并结合你的连接字符串运行命令来创建用户和访问令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"有关详细信息，请参阅使用 Azure CLI 创建和管理访问令牌。
设置
创建 Xcode 项目
在 Xcode 中，创建新的 iOS 项目，并选择“单视图应用”模板。 本教程使用 SwiftUI 框架，因此应将“语言”设置为“Swift”，并将“用户界面”设置为“SwiftUI”。 在此快速入门过程中，不会创建测试。 可以取消选中“包括测试”。
安装 CocoaPods
使用此指南在 Mac 上安装 CocoaPods。
使用 CocoaPods 安装包和依赖项
若要为应用程序创建
Podfile，请打开终端并导航到项目文件夹，然后运行 pod init。将以下代码添加到
Podfile并保存。 请参阅 SDK 支持版本。
platform :ios, '13.0'
use_frameworks!
target 'VideoCallingQuickstart' do
pod 'AzureCommunicationCalling', '~> 1.0.0'
end
运行 pod install。
使用 Xcode 打开
.xcworkspace。
直接使用 XCFramework
如果不使用 CocoaPods 作为依赖项管理器，可以直接从 发布页下载 AzureCommunicationCalling.xcframework。
请务必知道，AzureCommunicationCalling 依赖于 AzureCommunicationCommon，因此还需要在项目中安装它。
注意
尽管 AzureCommunicationCommon 是纯快速包，但不能使用 Swift Package Manager 安装它，与 AzureCommunicationCalling 一起使用，因为后者是 Objective-C 框架，Swift Package Manager 有意不支持 Swift ObjC 接口标头的设计，这意味着在使用 Swift Package Manager 安装时无法与 AzureCommunicationCalling 协同工作。 必须通过另一个依赖项管理器进行安装，或者从 AzureCommunicationCommon 源生成 xcframework 并导入到项目中。
请求访问麦克风和摄像头
若要访问设备的麦克风和摄像头，需要使用 NSMicrophoneUsageDescription 和 NSCameraUsageDescription 更新应用的信息属性列表。 你将关联的值设置为包含系统用于向用户请求访问权限的对话框的字符串。
右键单击项目树的 Info.plist 条目，然后选择“打开为”>“源代码”。 将以下代码行添加到顶层 <dict> 节，然后保存文件。
<key>NSMicrophoneUsageDescription</key>
<string>Need microphone access for VOIP calling.</string>
<key>NSCameraUsageDescription</key>
<string>Need camera access for video calling</string>
设置应用框架
打开项目的 ContentView.swift 文件，然后将 import 声明添加到文件顶部以导入 AzureCommunicationCalling 库和 AVFoundation。 AVFoundation 用于从代码中捕获音频权限。
import AzureCommunicationCalling
import AVFoundation
对象模型
以下类和接口处理适用于 iOS 的 Azure 通信服务呼叫 SDK 的某些主要功能。
| 名称 | 说明 |
|---|---|
CallClient |
CallClient 是通话 SDK 的主入口点。 |
CallAgent |
CallAgent 用于启动和管理通话。 |
CommunicationTokenCredential |
CommunicationTokenCredential 用作实例化 CallAgent 的令牌凭据。 |
CommunicationIdentifier |
CommunicationIdentifier 用于表示用户的身份，可以是以下选项之一：CommunicationUserIdentifier、PhoneNumberIdentifier 或 CallingApplication。 |
创建呼叫代理
将 ContentView struct 的实现替换为使用户可以发起和结束通话的一些简单 UI 控件。 我们会在本快速入门中将业务逻辑添加到这些控件。
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()
}
}
对客户端进行身份验证
为了初始化 CallAgent 实例，你需要用户访问令牌使其可以发出和接收呼叫。 如果你没有可用的令牌，请参阅用户访问令牌文档。
如果你有一个令牌，请将以下代码添加到 ContentView.swift 中的 onAppear 回调。 需要将 <USER ACCESS TOKEN> 替换为资源的有效用户访问令牌：
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 并访问设备管理器
若要从 CallClient 创建 CallAgent 实例，请使用 callClient.createCallAgent 方法，在初始化 CallAgent 对象后，该方法将以异步方式返回该对象。 借助 DeviceManager 可枚举通话中可用于传输音频/视频流的本地设备。 还可向用户请求访问麦克风/相机的权限。
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")
}
}
}
}
请求权限
我们需要将以下代码添加到 onAppear 回调，以请求音频和视频权限。
AVAudioSession.sharedInstance().requestRecordPermission { (granted) in
if granted {
AVCaptureDevice.requestAccess(for: .video) { (videoGranted) in
/* NO OPERATION */
}
}
}
配置音频会话
你将使用对象 AVAudioSession 来配置应用的音频会话。 下面是为应用启用蓝牙音频设备的示例：
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
}
显示本地视频
在开始通话之前，可以管理视频相关设置。 本快速入门介绍如何在通话之前或通话期间实现本地视频切换。
首先，我们需要通过 deviceManager 访问本地摄像头。 选择所需的摄像头后，我们可以构造 LocalVideoStream，然后创建 VideoStreamRenderer并将其附加到 previewView。 在通话期间，我们可以使用 startVideo 或 stopVideo 来开始或停止向远程参与者发送 LocalVideoStream。 此函数还可用于处理传入呼叫。
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
}
}
}
}
}
拨出电话
startCall 方法设置为在点击“开始呼叫”按钮时执行的操作。 在本快速入门中，传出呼叫默认仅为音频呼叫。 若要开始视频通话，我们需要使用 LocalVideoStream 设置 VideoOptions，并将其连同 startCallOptions 一起传递，以此来设置初始通话选项。
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 用于管理呼叫中事件和远程参与者。 我们在 setCallAndObserver 函数中设置观察程序。
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")
}
}
应答传入呼叫
若要应答传入呼叫，请实现 IncomingCallHandler 来显示传入呼叫横幅，以便应答或拒绝呼叫。 在 IncomingCallHandler.swift 中添加以下实现。
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
}
}
}
需要通过将以下代码添加到 ContentView.swift 中的 onAppear 回调来创建 IncomingCallHandler 的实例：
let incomingCallHandler = IncomingCallHandler.getOrCreateInstance()
incomingCallHandler.contentView = self
成功创建 CallAgent 后，设置 CallAgent 的委托：
self.callAgent!.delegate = incomingCallHandler
收到来电后，IncomingCallHandler 会调用函数 showIncomingCallBanner，以显示 answer 和 decline 按钮。
func showIncomingCallBanner(_ incomingCall: IncomingCall?) {
isIncomingCall = true
self.incomingCall = incomingCall
}
附加到 answer 和 decline 的操作按如下代码实现。 若要接听视频通话，需要打开本地视频，并将 AcceptCallOptions 的选项设为 localVideoStream。
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
}
远程参与者视频流
我们可以创建一个 RemoteVideoStreamData 类来处理远程参与者视频流的呈现。
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)
}
}
订阅事件
我们可以实现一个 CallObserver 类来订阅事件集合，以便值在通话期间更改时收到通知。
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
}
}
远程参与者管理
所有远程参与者均以 RemoteParticipant 类型表示，通话连接后 (CallState.connected)，即可通过通话实例上的 remoteParticipants 集合获得它。
注意
当用户加入通话时，他们可以通过 RemoteParticipants 集合访问当前的远程参与者。 不会为这些现有参与者触发 didUpdateRemoteParticipant 事件。 仅当用户已加入通话且远程参与者加入或离开通话时，才会触发此事件。
我们可以实现一个 RemoteParticipantObserver 类来订阅有关远程参与者远程视频流的更新。
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()
}
}
}
运行代码
可以通过选择“产品”>“运行”或使用 (⌘-R) 键盘快捷方式，在 iOS 模拟器上生成并运行应用。
本快速入门介绍如何使用适用于 Windows 的 Azure 通信服务通话 SDK 开始 1:1 视频通话。
UWP 示例代码
先决条件
若要完成本教程，需要具备以下先决条件：
具有活动订阅的 Azure 帐户。 免费创建帐户。
安装带有通用 Windows 平台开发工作负载的 Visual Studio 2022。
已部署的通信服务资源。 创建通信服务资源。 需要为此快速入门记录连接字符串。
Azure 通信服务的用户访问令牌。 可以使用 Azure CLI，并结合你的连接字符串运行命令来创建用户和访问令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"有关详细信息，请参阅使用 Azure CLI 创建和管理访问令牌。
设置
创建项目
在 Visual Studio 中，使用“空白应用（通用 Windows）”模板创建一个新项目，设置单页通用 Windows 平台 (UWP) 应用。
安装包
右键单击项目，转到 Manage Nuget Packages 来安装 Azure.Communication.Calling.WindowsClient 1.2.0-beta.1 或更高版本。 请务必选中“包括预发行版”。
请求访问权限
转到 Package.appxmanifest 并单击 Capabilities。
勾选 Internet (Client & Server)，获取 Internet 的入站和出站访问权限。
勾选 Microphone 以访问麦克风的音频源。
勾选 WebCam 以访问设备的摄像头。
通过右键单击并选择“查看代码”，将以下代码添加到 Package.appxmanifest。
<Extensions>
<Extension Category="windows.activatableClass.inProcessServer">
<InProcessServer>
<Path>RtmMvrUap.dll</Path>
<ActivatableClass ActivatableClassId="VideoN.VideoSchemeHandler" ThreadingModel="both" />
</InProcessServer>
</Extension>
</Extensions>
设置应用框架
我们需要配置基本布局来附加逻辑。 为了发起出站呼叫，需要通过 TextBox 提供被呼叫方的用户 ID。 还需要一个 Start Call 按钮和一个 Hang Up 按钮。
我们还需要预览本地视频，并呈现其他参与者的远程视频。 因此，我们需要两个元素来显示视频流。
打开项目的 MainPage.xaml，并将内容替换为以下实现。
<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>
打开 App.xaml.cs（右键单击并选择“查看代码”），并将此行添加到顶部：
using CallingQuickstart;
打开 MainPage.xaml.cs（右键单击并选择“查看代码”），并将内容替换为以下实现：
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
}
}
}
对象模型
以下类和接口用于处理 Azure 通信服务通话 SDK 的某些主要功能：
| 名称 | 说明 |
|---|---|
CallClient |
CallClient 是通话客户端库的主入口点。 |
CallAgent |
CallAgent 用于启动和加入通话。 |
CommunicationCall |
CommunicationCall 用于管理已发起或已加入的通话。 |
CallTokenCredential |
CallTokenCredential 用作实例化 CallAgent 的令牌凭据。 |
CommunicationUserIdentifier |
CommunicationUserIdentifier 用于表示用户的身份，可以是以下选项之一：CommunicationUserIdentifier、PhoneNumberIdentifier 或 CallingApplication。 |
验证客户端
若要初始化 CallAgent，需要用户访问令牌。 通常，此令牌从具有特定于应用程序的身份验证的服务生成。 有关用户访问令牌的详细信息，请查看用户访问令牌指南。
对于快速入门，请使用为你的 Azure 通信服务资源生成的用户访问令牌替换 <AUTHENTICATION_TOKEN>。
有了令牌后，使用该令牌来初始化 CallAgent 实例，以便发出和接收呼叫。 为了访问设备上的摄像头，我们还需要获取设备管理器实例。
向 InitCallAgentAndDeviceManagerAsync 函数添加以下代码。
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
}
}
开启视频通话
将实现添加到 CallButton_Click，使用视频开启呼叫。 我们需要使用设备管理器实例枚举摄像头并构造 LocalOutgoingVideoStream。 我们需要使用 LocalVideoStream 设置 VideoOptions，并随 startCallOptions 一起传递以设置通话的初始选项。 通过将 LocalOutgoingVideoStream 附加到 MediaElement，可以预览本地视频。
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;
}
添加方法来启动或加入不同类型的通话（一对一 Azure 通信服务通话、一对一电话通话、Azure 通信服务组通话、Teams 会议加入，等等）。
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 } }
};
}
添加代码以根据 CameraList_SelectionChanged 方法所选相机创建 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);
}
接听来电
将实现添加到 OnIncomingCallAsync，使用视频应答传入呼叫，将 LocalVideoStream 传递给 acceptCallOptions。
var incomingCall = args.IncomingCall;
var acceptCallOptions = new AcceptCallOptions() {
IncomingVideoOptions = new IncomingVideoOptions()
{
IncomingVideoStreamKind = VideoStreamKind.RemoteIncoming
}
};
_ = await incomingCall.AcceptAsync(acceptCallOptions);
远程参与者和远程视频流
通过呼叫实例上的 RemoteParticipants 集合提供所有远程参与者。 通话状态变为已连接 (CallState.Connected) 后，我们可以访问通话的远程参与者并处理远程视频流。
注意
当用户加入通话时，他们可以通过 RemoteParticipants 集合访问当前的远程参与者。 不会为这些现有参与者触发 RemoteParticipantsUpdated 事件。 仅当用户已加入通话且远程参与者加入或离开通话时，才会触发此事件。
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;
}
}
呈现远程视频
对于每个远程视频流，请将其附加到 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();
});
}
}
通话状态更新
通话断开连接后，我们需要清理视频渲染器，并处理远程参与者最初加入通话时的情况。
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;
}
}
结束呼叫
在单击 Hang Up 按钮时结束当前通话。 将实现添加到 HangupButton_Click，以结束使用我们创建的 callAgent 进行的呼叫，并拆除参与者更新和呼叫状态事件处理程序。
var call = this.callAgent?.Calls?.FirstOrDefault();
if (call != null)
{
try
{
await call.HangUpAsync(new HangUpOptions() { ForEveryone = true });
}
catch(Exception ex)
{
}
}
运行代码
可在 Visual Studio 中生成并运行代码。 对于解决方案平台，我们支持 ARM64、x64 和 x86。
通过在文本字段中提供用户 ID 并单击 Start Call 按钮，可以启动出站视频呼叫。
注意：呼叫 8:echo123 会停止视频流，因为回显机器人不支持视频流。
有关用户 ID（标识）的详细信息，请查看用户访问令牌指南。
WinUI 3 示例代码
先决条件
若要完成本教程，需要具备以下先决条件：
具有活动订阅的 Azure 帐户。 免费创建帐户。
基本了解如何创建 WinUI 3 应用。 创建第一个 WinUI 3（Windows 应用 SDK）项目是很好的入门资源。
已部署的通信服务资源。 创建通信服务资源。 需要为此快速入门记录连接字符串。
Azure 通信服务的用户访问令牌。 可以使用 Azure CLI，并结合你的连接字符串运行命令来创建用户和访问令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"有关详细信息，请参阅使用 Azure CLI 创建和管理访问令牌。
设置
创建项目
在 Visual Studio 中，使用“已打包空白应用(桌面中的 WinUI 3)”模板创建新项目，以设置单页 WinUI 3 应用。
安装包
右键单击项目，转到 Manage Nuget Packages 来安装 Azure.Communication.Calling.WindowsClient 1.0.0 或更高版本。 请务必选中“包括预发行版”。
请求访问权限
将以下代码添加到 app.manifest：
<file name="RtmMvrMf.dll">
<activatableClass name="VideoN.VideoSchemeHandler" threadingModel="both" xmlns="urn:schemas-microsoft-com:winrt.v1" />
</file>
设置应用框架
我们需要配置基本布局来附加逻辑。 为了发起出站呼叫，需要通过 TextBox 提供被呼叫方的用户 ID。 还需要一个 Start Call 按钮和一个 Hang Up 按钮。
我们还需要预览本地视频，并呈现其他参与者的远程视频。 因此，我们需要两个元素来显示视频流。
打开项目的 MainWindow.xaml，并将内容替换为以下实现。
<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>
打开 App.xaml.cs（右键单击并选择“查看代码”），并将此行添加到顶部：
using CallingQuickstart;
打开 MainWindow.xaml.cs（右键单击并选择“查看代码”），并将内容替换为以下实现：
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();
});
}
}
}
对象模型
以下类和接口用于处理 Azure 通信服务通话 SDK 的某些主要功能：
| 名称 | 说明 |
|---|---|
CallClient |
CallClient 是通话客户端库的主入口点。 |
CallAgent |
CallAgent 用于启动和加入通话。 |
CommunicationCall |
CommunicationCall 用于管理已发起或已加入的通话。 |
CallTokenCredential |
CallTokenCredential 用作实例化 CallAgent 的令牌凭据。 |
CommunicationUserIdentifier |
CommunicationUserIdentifier 用于表示用户的身份，可以是以下选项之一：CommunicationUserIdentifier、PhoneNumberIdentifier 或 CallingApplication。 |
验证客户端
若要初始化 CallAgent，需要用户访问令牌。 通常，此令牌从具有特定于应用程序的身份验证的服务生成。 有关用户访问令牌的详细信息，请查看用户访问令牌指南。
对于快速入门，请使用为你的 Azure 通信服务资源生成的用户访问令牌替换 <AUTHENTICATION_TOKEN>。
有了令牌后，使用该令牌来初始化 CallAgent 实例，以便发出和接收呼叫。 为了访问设备上的摄像头，我们还需要获取设备管理器实例。
向 InitCallAgentAndDeviceManagerAsync 函数添加以下代码。
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;
开启视频通话
将实现添加到 CallButton_Click，使用视频开启呼叫。 我们需要使用设备管理器实例枚举摄像头并构造 LocalVideoStream。 我们需要使用 LocalVideoStream 设置 VideoOptions，并随 startCallOptions 一起传递以设置通话的初始选项。 通过将 LocalVideoStream 附加到 MediaPlayerElement，可以预览本地视频。
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;
接听来电
将实现添加到 Agent_OnIncomingCallAsync，使用视频应答传入呼叫，将 LocalVideoStream 传递给 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);
远程参与者和远程视频流
通过呼叫实例上的 RemoteParticipants 集合提供所有远程参与者。 建立通话后，我们可以访问通话的远程参与者并处理远程视频流。
注意
当用户加入通话时，他们可以通过 RemoteParticipants 集合访问当前的远程参与者。 不会为这些现有参与者触发 OnRemoteParticipantsUpdated 事件。 仅当用户已加入通话且远程参与者加入或离开通话时，才会触发此事件。
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);
}
}
呈现远程视频
对于每个远程视频流，请将其附加到 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();
});
}
}
通话状态更新
通话断开连接后，我们需要清理视频渲染器，并处理远程参与者最初加入通话时的情况。
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;
}
}
结束呼叫
在单击 Hang Up 按钮时结束当前通话。 将实现添加到 HangupButton_Click，以结束使用我们创建的 callAgent 进行的呼叫，并拆除参与者更新和呼叫状态事件处理程序。
this.call.OnRemoteParticipantsUpdated -= Call_OnRemoteParticipantsUpdatedAsync;
this.call.OnStateChanged -= Call_OnStateChangedAsync;
await this.call.HangUpAsync(new HangUpOptions());
运行代码
可在 Visual Studio 中生成并运行代码。 对于解决方案平台，我们支持 ARM64、x64 和 x86。
通过在文本字段中提供用户 ID 并单击 Start Call 按钮，可以启动出站视频呼叫。
注意：呼叫 8:echo123 会停止视频流，因为回显机器人不支持视频流。
有关用户 ID（标识）的详细信息，请查看用户访问令牌指南。
本快速入门介绍如何使用适用于 Unity 的 Azure 通信服务通话 SDK 开始通话。 有关在 Unity 平台上接收和呈现视频帧的信息，请参阅原始媒体访问快速入门。
可以从 GitHub 下载示例应用。
先决条件
若要完成本教程，需要具备以下先决条件：
具有活动订阅的 Azure 帐户。 免费创建帐户。
使用通用 Windows 平台开发工作负载安装 Unity Hub 和 Unity Editor。
已部署的通信服务资源。 创建通信服务资源。 需要为此快速入门记录连接字符串。
Azure 通信服务的用户访问令牌。 可以使用 Azure CLI，并结合你的连接字符串运行命令来创建用户和访问令牌。
az communication identity token issue --scope voip --connection-string "yourConnectionString"有关详细信息，请参阅使用 Azure CLI 创建和管理访问令牌。
设置
创建项目
在 Unity Hub 中，使用 2D Core 模板创建新项目以设置 Unity 项目。
安装包
有两种方法来安装适用于 Unity 的 Azure 通信服务通话 SDK。
设置应用框架
我们需要配置基本布局来附加逻辑。 为了发起出站呼叫，需要通过 TextBox 提供被呼叫方的用户 ID。 还需要一个 Start/Join call 按钮和一个 Hang up 按钮。
在项目中创建名为 Main 的新场景。
打开 Main.unity 文件，并将内容替换为以下实现：
Main.Unity Code
Main.unity
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创建名为 AppManager.cs 的脚本，并将其链接到 Unity Editor 中的 AppManager 对象。 将内容替换为以下实现：
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 CommunicationCall 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, Azure.Communication.Calling.UnityClient.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;
}
}
}
}
在名为 AppManager 的 GameObject 中，将新创建的脚本拖动到其脚本组件中。 将“状态”文本对象拖动到“通话状态”文本字段中，以启用通话状态的 UI 更新。 SDK 通过 URI 提供视频，但目前 Unity 的视频播放器可能不支持 URI 播放。
对象模型
下表列出了用于处理 Azure 通信服务通话 SDK 的某些主要功能的类和接口：
| 名称 | 说明 |
|---|---|
CallClient |
CallClient 是通话 SDK 的主入口点。 |
CallAgent |
CallAgent 用于启动和管理通话。 |
Call |
CommunicationCall 用于管理正在进行的通话。 |
CallTokenCredential |
CallTokenCredential 用作实例化 CallAgent 的令牌凭据。 |
CallIdentifier |
CallIdentifier 用于表示用户的身份，这可以是以下选项之一：UserCallIdentifier、PhoneNumberCallIdentifier 等。 |
验证客户端
使用用户访问令牌初始化 CallAgent 实例，使我们可以发出和接收呼叫，并选择性地获取 DeviceManager 实例以查询客户端设备配置。
在代码中，将 <AUTHENTICATION_TOKEN> 替换为用户访问令牌。 如果还没有可用的令牌，请参阅用户访问令牌文档。
添加 InitCallAgentAndDeviceManagerAsync 函数，用于启动 SDK。 可以自定义此帮助程序以满足应用程序的要求。
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;
}
开启视频通话
获得 StartCallOptions 对象后，可使用 CallAgent 发起 Azure 通信服务呼叫：
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;
}
处理远程参与者和远程传入视频
传入视频与特定的远程参与者相关联，因此，RemoteParticipantsUpdated 是接收通知并获取对更改参与者的引用的关键事件。
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;
}
}
通过呼叫实例上的 RemoteParticipants 集合提供所有远程参与者。 建立通话后，我们可以访问通话的远程参与者并处理远程视频流。
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;
}
}
视频流将通过一系列内部状态传输。 VideoStreamState.Available 是将视频流绑定到 UI 元素以呈现视频流的首选状态，例如 MediaPlayerElement，VideoStreamState.Stopped 通常是指应完成清理任务（例如停止视频预览）的位置。
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;
}
}
结束呼叫
在单击 Hang up 按钮时结束当前通话。 将实现添加到 HangupButton_Click 以结束通话，并停止预览和视频流。
public async void HangupButton_Click()
{
if (call != null)
{
try
{
await call.HangUpAsync(new HangUpOptions() { ForEveryone = false });
}
catch (Exception ex)
{
}
}
}
接听来电
IncomingCallReceived 事件接收器是在 SDK 启动帮助程序 InitCallAgentAndDeviceManagerAsync 中设置的。
callAgent.IncomingCallReceived += OnIncomingCallAsync;
应用程序有机会配置应如何接受传入呼叫，例如视频和音频流类型。
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;
}
监视和响应呼叫状态更改事件
当正在进行的通话从一种状态转换到其他状态时，将会触发 Call 对象上的 StateChanged 事件。 应用程序有机会反映 UI 上的状态更改或插入业务逻辑。
private async void OnStateChangedAsync(object sender, Azure.Communication.Calling.UnityClient.PropertyChangedEventArgs args)
{
var call = sender as CommunicationCall;
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;
}
}
}
运行代码
可在 Unity Editor 或使用 Unity 的设备上生成和运行代码。
可以通过在“文本”字段中提供用户 ID 并单击 Start Call/Join 按钮，启动出站呼叫。 呼叫 8:echo123 会将你连接到回显机器人，此功能对于入门和验证音频设备是否正常运行非常有用。
清理资源
如果想要清理并删除通信服务订阅，可以删除资源或资源组。 删除资源组同时也会删除与之相关联的任何其他资源。 了解有关清理资源的详细信息。
后续步骤
有关详细信息，请参阅以下文章：