使用呼叫 SDK 向应用添加语音和视频呼叫，开启 Azure 通信服务使用旅程。
本文介绍如何使用适用于 Windows 的 Azure 通信服务呼叫 SDK 启动呼叫。
可以从适用于 .NET 的通话 SDK 的 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。
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，然后转到 Manage Nuget Packages 安装 Azure.Communication.Calling.WindowsClient1.4.0 或更高版本。 如果想要查看公共预览版的版本，请确保选中“Include Prerelease”。
请求访问权限
转到 Package.appxmanifest 并选择 Capabilities。
选中 Internet (Client) 和 Internet (Client & Server)，以获取 Internet 的入站和出站访问权限。 选中 Microphone 以访问麦克风的音频源，然后勾选 Webcam 以访问相机的视频源。
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。 Mute 和 BackgroundBlur 还包括在此示例中，用于演示切换音频状态和视频效果的功能。
打开你的项目的 MainPage.xaml，然后将 Grid 节点添加到 Page：
<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}" Width="800" Height="600">
<!-- Don't forget to replace ‘CallingQuickstart’ with your project’s name -->
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="16*"/>
<RowDefinition Height="30*"/>
<RowDefinition Height="200*"/>
<RowDefinition Height="60*"/>
<RowDefinition Height="16*"/>
</Grid.RowDefinitions>
<TextBox Grid.Row="1" x:Name="CalleeTextBox" PlaceholderText="Who would you like to call?" TextWrapping="Wrap" VerticalAlignment="Center" Height="30" Margin="10,10,10,10" />
<Grid x:Name="AppTitleBar" Background="LightSeaGreen">
<TextBlock x:Name="QuickstartTitle" Text="Calling Quickstart sample title bar" Style="{StaticResource CaptionTextBlockStyle}" Padding="7,7,0,0"/>
</Grid>
<Grid Grid.Row="2">
<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">
<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"/>
</StackPanel>
</StackPanel>
<TextBox Grid.Row="5" 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 MainPage.xaml.cs ，并将内容替换为以下实现：
using Azure.Communication.Calling.WindowsClient;
using System;
using System.Collections.Generic;
using System.ComponentModel;
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 = "<AUTHENTICATION_TOKEN>";
private CallClient callClient;
private CallTokenRefreshOptions callTokenRefreshOptions = new CallTokenRefreshOptions(false);
private CallAgent callAgent;
private CommunicationCall call;
private LocalOutgoingAudioStream micStream;
#region Page initialization
public MainPage()
{
this.InitializeComponent();
// Additional UI customization code goes here
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
await InitCallAgentAndDeviceManagerAsync();
base.OnNavigatedTo(e);
}
#endregion
#region UI event handlers
private async void CallButton_Click(object sender, RoutedEventArgs e)
{
// Start a call
}
private async void HangupButton_Click(object sender, RoutedEventArgs e)
{
// Hang up a call
}
private async void MuteLocal_Click(object sender, RoutedEventArgs e)
{
// Toggle mute/unmute audio state of a call
}
#endregion
#region API event handlers
private async void OnIncomingCallAsync(object sender, IncomingCallReceivedEventArgs args)
{
// Handle incoming call event
}
private async void OnStateChangedAsync(object sender, PropertyChangedEventArgs args)
{
// Handle connected and disconnected state change of a call
}
#endregion
#region Helper methods
private async Task InitCallAgentAndDeviceManagerAsync()
{
//Initialize the call agent and search for devices
}
private async Task<CommunicationCall> StartCallAsync(string acsCallee)
{
// Start a call to an Azure Communication Services user using the CallAgent and the callee id
}
#endregion
}
}
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 |
使用“ CallAgent 开始和管理呼叫”。 |
CommunicationCall |
使用 CommunicationCall 管理正在进行的呼叫。 |
CallTokenCredential |
使用CallTokenCredential作为令牌凭据来实例化CallAgent。 |
CallIdentifier |
用于 CallIdentifier 表示用户的标识，可以是下列选项之一： UserCallIdentifier， PhoneNumberCallIdentifier等等。 |
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。
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 Task InitCallAgentAndDeviceManagerAsync()
{
this.callClient = new CallClient(new CallClientOptions() {
Diagnostics = new CallDiagnosticsOptions() {
// make sure to put your project AppName
AppName = "CallingQuickstart",
AppVersion="1.0",
Tags = new[] { "Calling", "ACS", "Windows" }
}
});
// Set up local audio stream using the first mic enumerated
var deviceManager = await this.callClient.GetDeviceManagerAsync();
var mic = deviceManager?.Microphones?.FirstOrDefault();
micStream = new LocalOutgoingAudioStream();
var tokenCredential = new CallTokenCredential(authToken, callTokenRefreshOptions);
var callAgentOptions = new CallAgentOptions()
{
DisplayName = $"{Environment.MachineName}/{Environment.UserName}",
};
this.callAgent = await this.callClient.CreateCallAgentAsync(tokenCredential, callAgentOptions);
this.callAgent.IncomingCallReceived += OnIncomingCallAsync;
}
开始调用
获取 StartCallOptions 对象后，可以使用 CallAgent cto 启动 Azure 通信服务调用：
private async Task<CommunicationCall> StartCallAsync(string acsCallee)
{
var options = new StartCallOptions();
var call = await this.callAgent.StartCallAsync( new [] { new UserCallIdentifier(acsCallee) }, options);
return call;
}
结束呼叫
当最终用户单击 “挂起 ”按钮时结束当前呼叫。 将实现添加到 HangupButton_Click 中，以结束通话，并停止预览和视频流。
private async void HangupButton_Click(object sender, RoutedEventArgs e)
{
var call = this.callAgent?.Calls?.FirstOrDefault();
if (call != null)
{
await call.HangUpAsync(new HangUpOptions() { ForEveryone = false });
}
}
切换音频静音/取消静音
当最终用户单击“静音”按钮时，将传出音频 设为静音 。 在 MuteLocal_Click 中添加实现以将通话静音。
private async void MuteLocal_Click(object sender, RoutedEventArgs e)
{
var muteCheckbox = sender as CheckBox;
if (muteCheckbox != null)
{
var call = this.callAgent?.Calls?.FirstOrDefault();
if (call != null)
{
if ((bool)muteCheckbox.IsChecked)
{
await call.MuteOutgoingAudioAsync();
}
else
{
await call.UnmuteOutgoingAudioAsync();
}
}
// Update the UI to reflect the state
}
}
接听来电
IncomingCallReceived 事件接收器是在 SDK 启动帮助程序 InitCallAgentAndDeviceManagerAsync 中设置的。
this.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() { };
call = await incomingCall.AcceptAsync(acceptCallOptions);
call.StateChanged += OnStateChangedAsync;
}
监视和响应呼叫状态更改事件
当 StateChanged 正在进行的调用从一个状态转换到另一个状态时，对象上的 CommunicationCall 事件将运行。 此更改使你有机会反映状态更改或在应用程序中执行业务逻辑。
private async void OnStateChangedAsync(object sender, PropertyChangedEventArgs args)
{
var call = sender as CommunicationCall;
if (call != null)
{
var state = call.State;
// Update the UI
switch (state)
{
case CallState.Connected:
{
await call.StartAudioAsync(micStream);
break;
}
case CallState.Disconnected:
{
call.StateChanged -= OnStateChangedAsync;
call.Dispose();
break;
}
default: break;
}
}
}
使通话按钮可供使用
Callee ID 不为 null 或为空后，便可以发起通话。
必须使用OnStateChangedAsync操作来更改通话状态。
private async void CallButton_Click(object sender, RoutedEventArgs e)
{
var callString = CalleeTextBox.Text.Trim();
if (!string.IsNullOrEmpty(callString))
{
call = await StartCallAsync(callString);
call.StateChanged += OnStateChangedAsync;
}
}
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。
若要进行出站呼叫，请在文本字段中提供用户 ID，然后单击 “开始呼叫/加入 ”按钮。 通过拨打 8:echo123 可以连接到回声机器人。 使用此功能开始并验证音频设备是否正常工作。
本文介绍如何使用适用于 JavaScript 的 Azure 通信服务呼叫 SDK 启动呼叫。
代码示例
可以从 GitHub 下载示例应用程序，在您的应用程序中添加一对一语音通话功能。
注意
使用 Azure 通信服务 UI 库 对 Azure 通信服务用户进行出站呼叫访问。 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
具有活动订阅的 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。
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。
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
--save 选项将该库作为 package.json 文件中的依赖项列出。
设置应用框架
本文使用 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，并将它们在 package.json 中列为开发依赖项。
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
下面是需要添加到 index.html 文件的 HTML：
<!DOCTYPE html>
<html>
<head>
<title>Communication Client - Calling Sample</title>
</head>
<body>
<h4>Azure Communication Services</h4>
<h1>Calling Quickstart</h1>
<input
id="token-input"
type="text"
placeholder="User access token"
style="margin-bottom:1em; width: 200px;"
/>
</div>
<button id="token-submit" type="button">
Submit
</button>
<input
id="callee-id-input"
type="text"
placeholder="Who would you like to call?"
style="margin-bottom:1em; width: 200px; display: block;"
/>
<div>
<button id="call-button" type="button" disabled="true">
Start Call
</button>
<button id="accept-call-button" type="button" disabled="true">
Accept Call
</button>
<button id="hang-up-button" type="button" disabled="true">
Hang Up
</button>
</div>
<script src="./main.js"></script>
</body>
</html>
在名为 index.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。 添加以下代码以导入呼叫客户端，并获取对 DOM 元素的引用，以便我们可以附加业务逻辑。
import { CallClient } from "@azure/communication-calling";
import { AzureCommunicationTokenCredential } from '@azure/communication-common';
let call;
let incomingCall;
let callAgent;
let deviceManager;
let tokenCredential;
const userToken = document.getElementById("token-input");
const calleeInput = document.getElementById("callee-id-input");
const submitToken = document.getElementById("token-submit");
const callButton = document.getElementById("call-button");
const hangUpButton = document.getElementById("hang-up-button");
const acceptCallButton = document.getElementById('accept-call-button');
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 SDK 的主入口点。 |
CallAgent |
使用“ CallAgent 开始和管理呼叫”。 |
AzureCommunicationTokenCredential |
使用 AzureCommunicationTokenCredential 类来实现 CommunicationTokenCredential 接口，从而实例化 CallAgent。 |
验证客户端
需要在文本字段中输入资源的有效用户访问令牌，然后单击“ 提交”。 如果还没有可用的令牌，请参阅 用户访问令牌。 使用CallClient来初始化一个带有CommunicationTokenCredential的CallAgent实例，CommunicationTokenCredential使应用能够拨打和接听电话。
将以下代码添加到 app.js：
submitToken.addEventListener("click", async () => {
const callClient = new CallClient();
const userTokenCredential = userToken.value;
try {
tokenCredential = new AzureCommunicationTokenCredential(userTokenCredential);
callAgent = await callClient.createCallAgent(tokenCredential);
deviceManager = await callClient.getDeviceManager();
await deviceManager.askDevicePermission({ audio: true });
callButton.disabled = false;
submitToken.disabled = true;
// Listen for an incoming call to accept.
callAgent.on('incomingCall', async (args) => {
try {
incomingCall = args.incomingCall;
acceptCallButton.disabled = false;
callButton.disabled = true;
} catch (error) {
console.error(error);
}
});
} catch(error) {
window.alert("Please submit a valid token!");
}
})
开始呼叫
添加事件处理程序，以便在最终用户单击 callButton 时启动调用。
callButton.addEventListener("click", () => {
// start a call
const userToCall = calleeInput.value;
call = callAgent.startCall(
[{ id: userToCall }],
{}
);
// toggle button states
hangUpButton.disabled = false;
callButton.disabled = true;
});
结束呼叫
添加事件侦听器以在最终用户单击以下 hangUpButton项时结束当前调用：
hangUpButton.addEventListener("click", () => {
// end the current call
// The `forEveryone` property ends the call for all call participants.
call.hangUp({ forEveryone: true });
// toggle button states
hangUpButton.disabled = true;
callButton.disabled = false;
submitToken.disabled = false;
acceptCallButton.disabled = true;
});
接听来电
添加事件侦听器以接受对 acceptCallButton 的传入呼叫：
acceptCallButton.onclick = async () => {
try {
call = await incomingCall.accept();
acceptCallButton.disabled = true;
hangUpButton.disabled = false;
} catch (error) {
console.error(error);
}
}
添加 webpack 本地服务器代码
在项目根目录创建一个名为webpack.config.js的文件，以包含本快速入门的本地服务器逻辑。 将下列代码添加到 webpack.config.js：
const path = require('path');
const CopyPlugin = require("copy-webpack-plugin");
module.exports = {
mode: 'development',
entry: './index.js',
output: {
filename: 'main.js',
path: path.resolve(__dirname, 'dist'),
},
devServer: {
static: {
directory: path.join(__dirname, './')
},
},
plugins: [
new CopyPlugin({
patterns: [
'./index.html'
]
}),
]
};
运行代码
使用 npx webpack serve --config webpack.config.js 命令运行应用程序。
打开浏览器并导航到 http://localhost:8080/. 应会看到以下屏幕：
可以通过在相应文本字段中提供有效用户访问令牌和用户 ID 并单击“开始呼叫”按钮，启动出站 VOIP 呼叫。
呼叫 8:echo123 将连接你与回声机器人，该机器人可启动并验证音频设备是否正常工作。 将 {id: '8:echo123'} 传递给 CallAgent.startCall() API 以呼叫回响机器人。
若要呼叫 Azure 通信服务通信用户，请将 {communicationUserId: 'ACS_USER_ID'} 传递给 CallAgent.startCall() API。
本文介绍如何使用适用于 Android 的 Azure 通信服务呼叫 SDK 启动呼叫。
代码示例
可以从 GitHub 下载示例应用，以便 将语音呼叫添加到 Android 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。 需要为此文章记录连接字符串。
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
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“空视图活动”项目模板。
选择 API 26 的最低 SDK：Android 8.0（Oreo） 或更高版本。
安装包
找到项目 settings.gradle.kts，并确保能在 mavenCentral() 和 pluginManagement 下的存储库列表中看到 dependencyResolutionManagement
pluginManagement {
repositories {
...
mavenCentral()
...
}
}
dependencyResolutionManagement {
repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
repositories {
...
mavenCentral()
}
}
然后，在模块级别的 build.gradle 文件中，将以下行添加到依赖项和 android 代码部分：
android {
...
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
...
implementation ("com.azure.android:azure-communication-calling:2.6.0")
...
}
将权限添加到应用程序清单
若要请求调用所需的权限，必须在应用程序清单（app/src/main/AndroidManifest.xml）中声明这些权限。 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" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<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
需要两个输入：被叫方 ID 的文本输入，以及用于进行呼叫的按钮。 可以通过设计器或通过编辑布局 xml 来添加这些输入。 使用 ID call_button 和文本输入 callee_id 创建一个按钮。 导航到 (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">
<Button
android:id="@+id/call_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:text="Call"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="@+id/callee_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Callee Id"
android:inputType="textPersonName"
android:minHeight="48dp"
app:layout_constraintBottom_toTopOf="@+id/call_button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
创建主活动基架和绑定
完成布局后，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。 每项功能都在各自的部分中介绍。 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。 有关详细信息，请参阅onCreate了解活动生命周期。
导航到 MainActivity.java 并将内容替换为以下代码：
package com.contoso.acsquickstart;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.media.AudioManager;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.azure.android.communication.common.CommunicationUserIdentifier;
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.StartCallOptions;
import java.util.ArrayList;
import java.util.Arrays;
public class MainActivity extends AppCompatActivity {
private CallAgent callAgent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getAllPermissions();
createAgent();
// Bind call button to call `startCall`
Button callButton = findViewById(R.id.call_button);
callButton.setOnClickListener(l -> startCall());
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
}
/**
* Place a call to the callee id provided in `callee_id` text input.
*/
private void startCall() {
// See section on starting the call
}
}
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[]{android.Manifest.permission.RECORD_AUDIO, android.Manifest.permission.CAMERA, android.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。 应根据需要请求权限，而不是提前请求权限。 有关详细信息，请参阅 Android 权限。
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 |
|---|---|
allClient |
CallClient 是通话 SDK 的主入口点。 |
CallAgent |
使用“ CallAgent 开始和管理呼叫”。 |
CommunicationTokenCredential |
使用CommunicationTokenCredential作为令牌凭据来实例化CallAgent。 |
CommunicationIdentifier |
针对可能参与呼叫的不同类型的参与者使用 CommunicationIdentifier。 |
从用户访问令牌创建代理
借助用户令牌，可以实例化经过身份验证的呼叫代理。 此令牌是从特定于应用程序的身份验证的服务生成的。 有关详细信息，请参阅 用户访问令牌。
在本文中，将 <User_Access_Token> 替换为为您的 Azure 通信服务资源生成的用户访问令牌。
/**
* Create the call agent for placing calls
*/
private void createAgent() {
String userToken = "<User_Access_Token>";
try {
CommunicationTokenCredential credential = new CommunicationTokenCredential(userToken);
callAgent = new CallClient().createCallAgent(getApplicationContext(), credential).get();
} catch (Exception ex) {
Toast.makeText(getApplicationContext(), "Failed to create call agent.", Toast.LENGTH_SHORT).show();
}
}
使用呼叫代理开始呼叫
可以通过呼叫代理发起呼叫，为此需要提供被叫方 ID 列表和呼叫选项。 本文使用默认呼叫选项且不包含视频，并从文本输入中获取单个接收方 ID。
/**
* Place a call to the callee id provided in `callee_id` text input.
*/
private void startCall() {
EditText calleeIdView = findViewById(R.id.callee_id);
String calleeId = calleeIdView.getText().toString();
StartCallOptions options = new StartCallOptions();
callAgent.startCall(
getApplicationContext(),
Arrays.asList(new CommunicationUserIdentifier[]{new CommunicationUserIdentifier(calleeId)}),
options);
}
启动应用并呼叫回显机器人
可以使用工具栏上的 “运行应用 ”按钮（Shift+F10）启动应用。 通过呼叫 8:echo123 来验证是否能够进行通话。 播放预先录制的消息，然后重复你的消息并回复给你。
本文介绍如何使用适用于 iOS 的 Azure 通信服务呼叫 SDK 启动呼叫。
代码示例
可以从适用于 iOS 的通话 SDK 的 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。
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。
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 Xcode 项目
在 Xcode 中创建新的 iOS 项目，并选择“应用程序”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”。
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（确保“目标对象”与项目名称匹配）：
platform :ios, '13.0' use_frameworks! target 'AzureCommunicationCallingSample' do pod 'AzureCommunicationCalling', '~> 1.0.0' end运行
pod install。使用 Xcode 打开
.xcworkspace。
请求访问麦克风
若要访问设备的麦克风，需要使用 NSMicrophoneUsageDescription 更新应用的信息属性列表。 将关联的值设置为将要包含在系统用于向用户请求访问权限的对话框中的 string。
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>
设置应用框架
打开项目的 ContentView.swift 文件，然后将 声明添加到文件顶部以导入 import。 此外，导入 AVFoundation，我们需要使用此代码在代码中进行音频权限请求。
import AzureCommunicationCalling
import AVFoundation
将 ContentView 结构的实现替换为使用户可以启动和结束呼叫的一些简单 UI 控件。 我们会在本快速入门中将业务逻辑附加到这些控件。
struct ContentView: View {
@State var callee: String = ""
@State var callClient: CallClient?
@State var callAgent: CallAgent?
@State var call: Call?
var body: some View {
NavigationView {
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)
}
}
.navigationBarTitle("Calling Quickstart")
}.onAppear {
// Initialize call agent
}
}
func startCall() {
// Ask permissions
AVAudioSession.sharedInstance().requestRecordPermission { (granted) in
if granted {
// Add start call logic
}
}
}
func endCall() {
// Add end call logic
}
}
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 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。 |
CommunicationUserIdentifier |
"CommunicationUserIdentifier用于表示用户身份，可以是以下选项之一：CommunicationUserIdentifier、PhoneNumberIdentifier或CallingApplication." |
验证客户端
通过用户访问令牌初始化 CallAgent 实例，这使我们可以发出和接收呼叫。
在以下代码中，需要将 <USER ACCESS TOKEN> 替换为资源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。
将以下代码添加到 ContentView.swift 中的 onAppear 回调：
var userCredential: CommunicationTokenCredential?
do {
userCredential = try CommunicationTokenCredential(token: "<USER ACCESS TOKEN>")
} catch {
print("ERROR: It was not possible to create user credential.")
return
}
self.callClient = CallClient()
// Creates the call agent
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.")
}
}
开始呼叫
startCall 方法设置为在点击“开始呼叫”按钮时执行的操作。 更新实现，以便使用 ASACallAgent 开始呼叫：
func startCall()
{
// Ask permissions
AVAudioSession.sharedInstance().requestRecordPermission { (granted) in
if granted {
// start call logic
let callees:[CommunicationIdentifier] = [CommunicationUserIdentifier(self.callee)]
self.callAgent?.startCall(participants: callees, options: StartCallOptions()) { (call, error) in
if (error == nil) {
self.call = call
} else {
print("Failed to get call object")
}
}
}
}
}
还可以使用 StartCallOptions 中的属性来设置呼叫的初始选项（例如，它允许在麦克风静音的情况下开始呼叫）。
结束呼叫
实现 endCall 方法，以便在点击“结束呼叫”按钮时结束当前呼叫。
func endCall()
{
self.call!.hangUp(options: HangUpOptions()) { (error) in
if (error != nil) {
print("ERROR: It was not possible to hangup the call.")
}
}
}
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。
可以通过在“文本”字段中提供用户 ID 并点击“开始呼叫”按钮，建立出站 VOIP 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。
注意
首次进行呼叫时，系统会提示你访问麦克风。 在生产应用程序中，应使用 AVAudioSession API 检查权限状态 ，并在未授予权限时正常更新应用程序的行为。
本文介绍如何使用用于 Unity 的 Azure 通信服务呼叫 SDK 启动呼叫。
可以从适用于 .NET 的通话 SDK 的 GitHub 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。
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
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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 UnityEngine.Video;
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;
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
}
private async void OnIncomingCallAsync(object sender, IncomingCallReceivedEventArgs args)
{
// Handle incoming call event
}
private void OnStateChangedAsync(object sender, Azure.Communication.Calling.UnityClient.PropertyChangedEventArgs args)
{
// Handle connected and disconnected state change of a call
}
//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。 此外，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。
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 |
使用“ CallAgent 开始和管理呼叫”。 |
Call |
使用 CommunicationCall 管理正在进行的呼叫。 |
CallTokenCredential |
使用CallTokenCredential作为令牌凭据来实例化CallAgent。 |
CallIdentifier |
用于 CallIdentifier 表示用户的标识，可以是下列选项之一： UserCallIdentifier， PhoneNumberCallIdentifier等等。 |
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。
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;
}
开始调用
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();
var callee = new UserCallIdentifier(CalleeIdentity);
call = await callAgent.StartCallAsync(new CallIdentifier[] { callee }, startCallOptions);
// Set up handler for call StateChanged event
call.StateChanged += OnStateChangedAsync;
}
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 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 StateChanged 对象上的 Call 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, 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.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。 调用 8:echo123 将你与回显机器人连接，此功能将启动并验证音频设备是否正常工作。
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。