Flutter视频通信插件opentok_flutter的使用

Flutter视频通信插件opentok_flutter的使用

A basic OpenTok plugin for Flutter. Currently only supports Android & iOS. This plugin only supports 1v1视频通话与OpenTok集成。

开始使用

为了进行OpenTok视频通话，您需要一个TokBox/OpenTok帐户。注册后，创建一个项目并导航到OpenTok Playground。您可以在那里生成所需的apiKey、sessionId和token。

要了解如何使用此插件，请查看示例。

完整示例代码

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:opentok_flutter/opentok.dart';
import 'package:opentok_flutter/opentok_view.dart';
import 'package:permission_handler/permission_handler.dart';

void main() {
  runApp(const MaterialApp(home: MyApp()));
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
  late OpenTokConfig _config;
  OpenTokController? _controller;
  bool isFullScreen = true;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    initPlatformState();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    switch (state) {
      case AppLifecycleState.resumed:
        _controller?.resume();
        break;
      case AppLifecycleState.paused:
        _controller?.pause();
        break;
      default:
    }
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    _config = OpenTokConfig(
      apiKey: "", // 替换为您的API密钥
      sessionId: "", // 替换为您会话ID
      token: "", // 替换为您令牌
    );

    _controller = OpenTokController();
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) async {
      Map<Permission, PermissionStatus> statuses = await [
        Permission.camera,
        Permission.microphone,
      ].request();
      final isGranted =
          statuses[Permission.camera] == PermissionStatus.granted &&
              statuses[Permission.microphone] == PermissionStatus.granted;
      if (isGranted) {
        _controller?.initSession(_config);
      } else {
        debugPrint("Camera or Microphone permission or both denied by the user!");
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('插件示例应用'),
        actions: [
          IconButton(
            onPressed: () => _controller?.initSession(_config),
            icon: const Icon(Icons.video_call_rounded),
          )
        ],
      ),
      body: SizedBox(
        height: isFullScreen
            ? MediaQuery.of(context).size.height
            : MediaQuery.of(context).size.height * 0.5,
        child: OpenTokView(
          controller: _controller ?? OpenTokController(),
          padding: const EdgeInsets.only(bottom: 10),
          onFullScreenButtonTap: () =>
              setState(() => isFullScreen = !isFullScreen),
          onEndButtonTap: () => _controller?.endSession(),
          onCameraButtonTap: () => _controller?.toggleCamera(),
          onMicButtonTap: (isEnabled) => _controller?.toggleAudio(!isEnabled),
          onVideoButtonTap: (isEnabled) => _controller?.toggleVideo(!isEnabled),
        ),
      ),
    );
  }
}

代码说明

  1. 导入库：

    import 'package:flutter/material.dart';
import 'dart:async';

import 'package:opentok_flutter/opentok.dart';
import 'package:opentok_flutter/opentok_view.dart';
import 'package:permission_handler/permission_handler.dart';

  2. 初始化状态：

    void main() {
  runApp(const MaterialApp(home: MyApp()));
}

  3. 定义状态管理类：

    class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

  4. 实现状态管理逻辑：

    class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
  late OpenTokConfig _config;
  OpenTokController? _controller;
  bool isFullScreen = true;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    initPlatformState();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    switch (state) {
      case AppLifecycleState.resumed:
        _controller?.resume();
        break;
      case AppLifecycleState.paused:
        _controller?.pause();
        break;
      default:
    }
  }

  // 初始化平台状态
  Future<void> initPlatformState() async {
    _config = OpenTokConfig(
      apiKey: "", // 替换为您的API密钥
      sessionId: "", // 替换为您会话ID
      token: "", // 替换为您令牌
    );

    _controller = OpenTokController();
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) async {
      Map<Permission, PermissionStatus> statuses = await [
        Permission.camera,
        Permission.microphone,
      ].request();
      final isGranted =
          statuses[Permission.camera] == PermissionStatus.granted &&
              statuses[Permission.microphone] == PermissionStatus.granted;
      if (isGranted) {
        _controller?.initSession(_config);
      } else {
        debugPrint("Camera or Microphone permission or both denied by the user!");
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('插件示例应用'),
        actions: [
          IconButton(
            onPressed: () => _controller?.initSession(_config),
            icon: const Icon(Icons.video_call_rounded),
          )
        ],
      ),
      body: SizedBox(
        height: isFullScreen
            ? MediaQuery.of(context).size.height
            : MediaQuery.of(context).size.height * 0.5,
        child: OpenTokView(
          controller: _controller ?? OpenTokController(),
          padding: const EdgeInsets.only(bottom: 10),
          onFullScreenButtonTap: () =>
              setState(() => isFullScreen = !isFullScreen),
          onEndButtonTap: () => _controller?.endSession(),
          onCameraButtonTap: () => _controller?.toggleCamera(),
          onMicButtonTap: (isEnabled) => _controller?.toggleAudio(!isEnabled),
          onVideoButtonTap: (isEnabled) => _controller?.toggleVideo(!isEnabled),
        ),
      ),
    );
  }
}

更多关于Flutter视频通信插件opentok_flutter的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter视频通信插件opentok_flutter的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，以下是一个关于如何在Flutter项目中使用opentok_flutter插件进行视频通信的示例代码。这个示例将涵盖基本的初始化、会话连接以及视频渲染。

首先，确保你已经在pubspec.yaml文件中添加了opentok_flutter依赖：

dependencies:
  flutter:
    sdk: flutter
  opentok_flutter: ^x.y.z  # 替换为最新的版本号

然后，运行flutter pub get来安装依赖。

接下来，我们编写Flutter代码。这个示例将包括以下几个步骤：

  1. 初始化Opentok会话。
  2. 连接到会话。
  3. 渲染本地和远程视频流。
import 'package:flutter/material.dart';
import 'package:opentok_flutter/opentok_flutter.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Opentok Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: VideoChatScreen(),
    );
  }
}

class VideoChatScreen extends StatefulWidget {
  @override
  _VideoChatScreenState createState() => _VideoChatScreenState();
}

class _VideoChatScreenState extends State<VideoChatScreen> {
  final String apiKey = 'YOUR_API_KEY'; // 替换为你的Opentok API Key
  final String sessionId = 'YOUR_SESSION_ID'; // 替换为你的Session ID
  final String token = 'YOUR_TOKEN'; // 替换为你的Token

  OTSession? _session;
  OTPublisher? _publisher;
  OTSubscriber? _subscriber;

  @override
  void initState() {
    super.initState();
    initOpentok();
  }

  void initOpentok() async {
    // 初始化OTSession
    _session = await OTSession.create(apiKey, sessionId, token);

    // 监听会话事件
    _session!.onConnected = () {
      print('Connected to session');
      // 连接成功后初始化发布者
      initPublisher();
    };

    // 连接到会话
    await _session!.connect();
  }

  void initPublisher() async {
    // 初始化OTPublisher
    _publisher = await OTPublisher.create();

    // 将发布者添加到会话中
    if (_session != null) {
      _session!.publish(_publisher!);
    }

    // 将发布者视图添加到UI中
    setState(() {});
  }

  void onSubscriberAdded(OTSubscriber subscriber) {
    // 保存远程订阅者
    setState(() {
      _subscriber = subscriber;
    });

    // 将订阅者视图添加到UI中
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Opentok Flutter Demo'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          // 显示本地视频流
          if (_publisher != null)
            AspectRatio(
              aspectRatio: _publisher!.videoSettings.aspectRatio,
              child: OTPublisherView(_publisher!),
            ),

          // 显示远程视频流
          if (_subscriber != null)
            AspectRatio(
              aspectRatio: _subscriber!.videoSettings.aspectRatio,
              child: OTSubscriberView(_subscriber!),
            ),
        ],
      ),
    );
  }

  @override
  void dispose() {
    // 清理资源
    _publisher?.dispose();
    _subscriber?.dispose();
    _session?.disconnect();
    super.dispose();
  }
}

注意事项：

  1. 替换YOUR_API_KEY, YOUR_SESSION_ID, 和 YOUR_TOKEN 为你的实际Opentok凭证。
  2. 确保你的Opentok项目已经配置正确，并且有权限访问所需的API。
  3. 由于网络延迟和权限等问题，实际项目中可能需要更复杂的错误处理和状态管理。

这个示例提供了一个基础框架，你可以根据实际需求进行扩展，比如添加音频处理、更多的UI元素、错误处理等。

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