Flutter WebRTC通信插件flutter_zwap_webrtc的使用

WebRTC插件用于Flutter移动、桌面和Web平台。它提供了强大的音视频通信功能，并支持多种设备和操作系统。

功能特性

下表展示了当前插件在不同平台上的功能支持情况：

使用方法

添加依赖

在pubspec.yaml文件中添加以下依赖项：

dependencies:
  flutter_webrtc: ^0.10.0

然后运行flutter pub get命令以安装依赖。

iOS配置

在Info.plist文件中添加以下权限描述：

<key>NSCameraUsageDescription</key>
<string>$(PRODUCT_NAME) Camera Usage!</string>
<key>NSMicrophoneUsageDescription</key>
<string>$(PRODUCT_NAME) Microphone Usage!</string>

Android配置

在AndroidManifest.xml文件中添加必要的权限：

<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

<!-- 如果需要蓝牙支持 -->
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

同时确保build.gradle文件设置为Java 8：

android {
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

如果需要更高的API级别，可以将minSdkVersion提高到23。

示例代码

以下是一个完整的示例代码，展示了如何使用flutter_webrtc插件进行音视频通信：

import 'dart:core';

import 'package:flutter/foundation.dart' show debugDefaultTargetPlatformOverride;
import 'package:flutter/material.dart';
import 'package:flutter_zwap_webrtc/flutter_webrtc.dart';

void main() {
  if (WebRTC.platformIsDesktop) {
    debugDefaultTargetPlatformOverride = TargetPlatform.fuchsia;
  } else if (WebRTC.platformIsAndroid) {
    WidgetsFlutterBinding.ensureInitialized();
    startForegroundService();
  }
  runApp(MyApp());
}

Future<bool> startForegroundService() async {
  final androidConfig = FlutterBackgroundAndroidConfig(
    notificationTitle: 'Title of the notification',
    notificationText: 'Text of the notification',
    notificationImportance: AndroidNotificationImportance.Default,
    notificationIcon: AndroidResource(
        name: 'background_icon', defType: 'drawable'),
  );
  await FlutterBackground.initialize(androidConfig: androidConfig);
  return FlutterBackground.enableBackgroundExecution();
}

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

class _MyAppState extends State<MyApp> {
  late List<RouteItem> items;

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

  ListBody _buildRow(context, item) {
    return ListBody(children: <Widget>[
      ListTile(
        title: Text(item.title),
        onTap: () => item.push(context),
        trailing: Icon(Icons.arrow_right),
      ),
      Divider()
    ]);
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          appBar: AppBar(
            title: Text('Flutter-WebRTC example'),
          ),
          body: ListView.builder(
              shrinkWrap: true,
              padding: const EdgeInsets.all(0.0),
              itemCount: items.length,
              itemBuilder: (context, i) {
                return _buildRow(context, items[i]);
              })),
    );
  }

  void _initItems() {
    items = <RouteItem>[
      RouteItem(
          title: 'GetUserMedia',
          push: (BuildContext context) {
            Navigator.push(
                context,
                MaterialPageRoute(
                    builder: (BuildContext context) => GetUserMediaSample()));
          }),
      RouteItem(
          title: 'GetDisplayMedia',
          push: (BuildContext context) {
            Navigator.push(
                context,
                MaterialPageRoute(
                    builder: (BuildContext context) =>
                        GetDisplayMediaSample()));
          }),
      RouteItem(
          title: 'LoopBack Sample',
          push: (BuildContext context) {
            Navigator.push(
                context,
                MaterialPageRoute(
                    builder: (BuildContext context) => LoopBackSample()));
          }),
      RouteItem(
          title: 'DataChannel',
          push: (BuildContext context) {
            Navigator.push(
                context,
                MaterialPageRoute(
                    builder: (BuildContext context) => DataChannelSample()));
          }),
    ];
  }
}

class RouteItem {
  final String title;
  final Function(BuildContext) push;

  RouteItem({required this.title, required this.push});
}