Flutter视频通话插件flutter_vonage_opentok_web的使用

Flutter视频通话插件flutter_vonage_opentok_web的使用

简介

flutter_vonage_opentok_web 是一个用于在 Flutter 应用中实现视频通话功能的插件。它基于 Vonage OpenTok Web SDK，可以在浏览器中轻松集成视频通话功能。

安装

在 pubspec.yaml 文件中添加依赖：

dependencies:
  flutter_vonage_opentok_web: ^0.1.0

然后运行以下命令以安装依赖：

flutter pub get

使用步骤

1. 初始化 OpenTok 会话

首先，你需要从 Vonage 获取 API 密钥、API 秘钥和项目 ID。这些信息将在初始化时使用。

import 'package:flutter_vonage_opentok_web/flutter_vonage_opentok_web.dart';

void main() async {
  // 初始化 OpenTok 会话
  await FlutterVonageOpentokWeb.init(
    apiKey: "YOUR_API_KEY",
    sessionId: "YOUR_SESSION_ID",
    token: "YOUR_TOKEN",
  );
}

2. 创建视频通话界面

接下来，创建一个包含视频通话控件的界面。你可以通过 FlutterVonageOpentokWeb 提供的方法来控制视频流。

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

class VideoCallPage extends StatefulWidget {
  [@override](/user/override)
  _VideoCallPageState createState() => _VideoCallPageState();
}

class _VideoCallPageState extends State<VideoCallPage> {
  bool isPublisher = true; // 是否为发布者
  bool isSubscribed = false; // 是否订阅了其他用户的视频流

  [@override](/user/override)
  void initState() {
    super.initState();
    // 初始化 OpenTok 会话
    initOpenTokSession();
  }

  Future<void> initOpenTokSession() async {
    await FlutterVonageOpentokWeb.init(
      apiKey: "YOUR_API_KEY",
      sessionId: "YOUR_SESSION_ID",
      token: "YOUR_TOKEN",
    );
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Flutter 视频通话"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            // 显示本地视频流
            StreamBuilder<bool>(
              stream: FlutterVonageOpentokWeb.isPublisherStream,
              builder: (context, snapshot) {
                if (snapshot.data == true) {
                  return FlutterVonageOpentokWeb.localView();
                } else {
                  return Text("等待发布...");
                }
              },
            ),

            SizedBox(height: 20),

            // 显示远程视频流
            StreamBuilder<bool>(
              stream: FlutterVonageOpentokWeb.isSubscribedStream,
              builder: (context, snapshot) {
                if (snapshot.data == true) {
                  return FlutterVonageOpentokWeb.remoteView();
                } else {
                  return Text("等待接收...");
                }
              },
            ),

            SizedBox(height: 20),

            // 切换发布/订阅状态
            ElevatedButton(
              onPressed: () {
                setState(() {
                  isPublisher = !isPublisher;
                  isSubscribed = !isSubscribed;

                  if (isPublisher) {
                    FlutterVonageOpentokWeb.publishStream();
                  } else {
                    FlutterVonageOpentokWeb.unpublishStream();
                  }

                  if (isSubscribed) {
                    FlutterVonageOpentokWeb.subscribeStream();
                  } else {
                    FlutterVonageOpentokWeb.unsubscribeStream();
                  }
                });
              },
              child: Text(isPublisher ? "切换为订阅者" : "切换为发布者"),
            ),
          ],
        ),
      ),
    );
  }
}

功能说明

1. 初始化会话：

   • 使用 FlutterVonageOpentokWeb.init() 方法初始化 OpenTok 会话。
   • 需要传入 apiKey、sessionId 和 token。

2. 本地视频流：

   • 使用 FlutterVonageOpentokWeb.localView() 显示本地视频流。

3. 远程视频流：

   • 使用 FlutterVonageOpentokWeb.remoteView() 显示远程视频流。

4. 发布与订阅：

   • 调用 FlutterVonageOpentokWeb.publishStream() 发布本地视频流。
   • 调用 FlutterVonageOpentokWeb.subscribeStream() 订阅远程视频流。

注意事项

• 确保你的项目已正确配置 OpenTok SDK。
• 在生产环境中，请妥善管理 API 密钥和用户令牌。
• 如果遇到问题，请参考 Vonage OpenTok 文档。

完整示例代码

以下是完整的示例代码：

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

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: VideoCallPage(),
    );
  }
}

class VideoCallPage extends StatefulWidget {
  [@override](/user/override)
  _VideoCallPageState createState() => _VideoCallPageState();
}

class _VideoCallPageState extends State<VideoCallPage> {
  bool isPublisher = true;
  bool isSubscribed = false;

  [@override](/user/override)
  void initState() {
    super.initState();
    initOpenTokSession();
  }

  Future<void> initOpenTokSession() async {
    await FlutterVonageOpentokWeb.init(
      apiKey: "YOUR_API_KEY",
      sessionId: "YOUR_SESSION_ID",
      token: "YOUR_TOKEN",
    );
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Flutter 视频通话"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            StreamBuilder<bool>(
              stream: FlutterVonageOpentokWeb.isPublisherStream,
              builder: (context, snapshot) {
                if (snapshot.data == true) {
                  return FlutterVonageOpentokWeb.localView();
                } else {
                  return Text("等待发布...");
                }
              },
            ),

            SizedBox(height: 20),

            StreamBuilder<bool>(
              stream: FlutterVonageOpentokWeb.isSubscribedStream,
              builder: (context, snapshot) {
                if (snapshot.data == true) {
                  return FlutterVonageOpentokWeb.remoteView();
                } else {
                  return Text("等待接收...");
                }
              },
            ),

            SizedBox(height: 20),

            ElevatedButton(
              onPressed: () {
                setState(() {
                  isPublisher = !isPublisher;
                  isSubscribed = !isSubscribed;

                  if (isPublisher) {
                    FlutterVonageOpentokWeb.publishStream();
                  } else {
                    FlutterVonageOpentokWeb.unpublishStream();
                  }

                  if (isSubscribed) {
                    FlutterVonageOpentokWeb.subscribeStream();
                  } else {
                    FlutterVonageOpentokWeb.unsubscribeStream();
                  }
                });
              },
              child: Text(isPublisher ? "切换为订阅者" : "切换为发布者"),
            ),
          ],
        ),
      ),
    );
  }
}