Flutter即时通讯插件rocket_chat_connector_flutter的使用

发布于 1周前 作者 sinazl 来自 Flutter

Flutter即时通讯插件rocket_chat_connector_flutter的使用

Flutter Rocket.chat 连接器插件 rocket_chat_connector_flutter 可以帮助开发者快速集成 Rocket.chat 的功能到 Flutter 应用中。以下是一个完整的示例，展示了如何使用此插件进行基本的即时通讯操作。

获取开始

本项目是一个 Dart 包，用于在多个 Flutter 或 Dart 项目中共享代码。

对于 Flutter 开发的帮助，可以查看我们的 官方文档，其中包括教程、示例、移动开发指导以及完整的 API 参考。

完整示例代码

以下是使用 rocket_chat_connector_flutter 插件的完整示例代码：

import 'dart:convert';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:rocket_chat_connector_flutter/models/authentication.dart';
import 'package:rocket_chat_connector_flutter/models/channel.dart';
import 'package:rocket_chat_connector_flutter/models/room.dart';
import 'package:rocket_chat_connector_flutter/models/user.dart';
import 'package:rocket_chat_connector_flutter/services/authentication_service.dart';
import 'package:rocket_chat_connector_flutter/services/http_service.dart' as rocket_http_service;
import 'package:rocket_chat_connector_flutter/web_socket/notification.dart' as rocket_notification;
import 'package:rocket_chat_connector_flutter/web_socket/web_socket_service.dart';
import 'package:web_socket_channel/web_socket_channel.dart';

void main() => runApp(MyApp());

// 替换为你的服务器地址和 WebSocket 地址
final String serverUrl = "yourServerUrl";
final String webSocketUrl = "yourWebSocketUrl";
final String username = "yourUsername";
final String password = "yourPassword";

// 初始化服务
final rocket_http_service.HttpService rocketHttpService = rocket_http_service.HttpService(Uri.parse(serverUrl));
final Channel channel = Channel(id: "yourChannelId");
final Room room = Room(id: "yourRoomId");

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final title = 'Rocket Chat WebSocket Demo';

    return MaterialApp(
      title: title,
      home: MyHomePage(
        title: title,
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  final String title;

  MyHomePage({Key key, @required this.title}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  TextEditingController _controller = TextEditingController();
  WebSocketChannel webSocketChannel;
  WebSocketService webSocketService = WebSocketService();
  User user;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<Authentication>(
        future: getAuthentication(),
        builder: (context, AsyncSnapshot<Authentication> snapshot) {
          if (snapshot.hasData) {
            user = snapshot.data.data.me;
            webSocketChannel = webSocketService.connectToWebSocket(
                webSocketUrl, snapshot.data);
            webSocketService.streamNotifyUserSubscribe(webSocketChannel, user);
            return _getScaffold();
          } else {
            return Center(child: CircularProgressIndicator());
          }
        });
  }

  Scaffold _getScaffold() {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(20.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            Form(
              child: TextFormField(
                controller: _controller,
                decoration: InputDecoration(labelText: 'Send a message'),
              ),
            ),
            StreamBuilder(
              stream: webSocketChannel.stream,
              builder: (context, snapshot) {
                print(snapshot.data);
                rocket_notification.Notification notification = snapshot.hasData
                    ? rocket_notification.Notification.fromMap(
                        jsonDecode(snapshot.data))
                    : null;
                print(notification);
                webSocketService.streamNotifyUserSubscribe(
                    webSocketChannel, user);
                return Padding(
                  padding: const EdgeInsets.symmetric(vertical: 24.0),
                  child: Text(
                      notification != null ? '${notification.toString()}' : ''),
                );
              },
            )
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _sendMessage,
        tooltip: 'Send message',
        child: Icon(Icons.send),
      ),
    );
  }

  void _sendMessage() {
    if (_controller.text.isNotEmpty) {
      webSocketService.sendMessageOnChannel(
          _controller.text, webSocketChannel, channel);
      webSocketService.sendMessageOnRoom(
          _controller.text, webSocketChannel, room);
    }
  }

  @override
  void dispose() {
    webSocketChannel.sink.close();
    super.dispose();
  }

  Future<Authentication> getAuthentication() async {
    final AuthenticationService authenticationService =
        AuthenticationService(rocketHttpService);
    return await authenticationService.login(username, password);
  }
}

代码解释

  1. 导入必要的包：

    import 'package:rocket_chat_connector_flutter/models/authentication.dart';
import 'package:rocket_chat_connector_flutter/models/channel.dart';
import 'package:rocket_chat_connector_flutter/models/room.dart';
import 'package:rocket_chat_connector_flutter/models/user.dart';
import 'package:rocket_chat_connector_flutter/services/authentication_service.dart';
import 'package:rocket_chat_connector_flutter/services/http_service.dart' as rocket_http_service;
import 'package:rocket_chat_connector_flutter/web_socket/notification.dart' as rocket_notification;
import 'package:rocket_chat_connector_flutter/web_socket/web_socket_service.dart';
import 'package:web_socket_channel/web_socket_channel.dart';

  2. 初始化变量：

    final String serverUrl = "yourServerUrl";
final String webSocketUrl = "yourWebSocketUrl";
final String username = "yourUsername";
final String password = "yourPassword";
final Channel channel = Channel(id: "yourChannelId");
final Room room = Room(id: "yourRoomId");
final rocket_http_service.HttpService rocketHttpService = rocket_http_service.HttpService(Uri.parse(serverUrl));

  3. 创建应用主体：

    class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final title = 'Rocket Chat WebSocket Demo';

    return MaterialApp(
      title: title,
      home: MyHomePage(
        title: title,
      ),
    );
  }
}

  4. 实现主页面状态：

    class MyHomePage extends StatefulWidget {
  final String title;

  MyHomePage({Key key, @required this.title}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  // 控制器
  TextEditingController _controller = TextEditingController();
  WebSocketChannel webSocketChannel;
  WebSocketService webSocketService = WebSocketService();
  User user;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<Authentication>(
        future: getAuthentication(),
        builder: (context, AsyncSnapshot<Authentication> snapshot) {
          if (snapshot.hasData) {
            user = snapshot.data.data.me;
            webSocketChannel = webSocketService.connectToWebSocket(
                webSocketUrl, snapshot.data);
            webSocketService.streamNotifyUserSubscribe(webSocketChannel, user);
            return _getScaffold();
          } else {
            return Center(child: CircularProgressIndicator());
          }
        });
  }

  Scaffold _getScaffold() {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(20.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            Form(
              child: TextFormField(
                controller: _controller,
                decoration: InputDecoration(labelText: 'Send a message'),
              ),
            ),
            StreamBuilder(
              stream: webSocketChannel.stream,
              builder: (context, snapshot) {
                print(snapshot.data);
                rocket_notification.Notification notification = snapshot.hasData
                    ? rocket_notification.Notification.fromMap(
                        jsonDecode(snapshot.data))
                    : null;
                print(notification);
                webSocketService.streamNotifyUserSubscribe(
                    webSocketChannel, user);
                return Padding(
                  padding: const EdgeInsets.symmetric(vertical: 24.0),
                  child: Text(
                      notification != null ? '${notification.toString()}' : ''),
                );
              },
            )
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _sendMessage,
        tooltip: 'Send message',
        child: Icon(Icons.send),
      ),
    );
  }

  void _sendMessage() {
    if (_controller.text.isNotEmpty) {
      webSocketService.sendMessageOnChannel(
          _controller.text, webSocketChannel, channel);
      webSocketService.sendMessageOnRoom(
          _controller.text, webSocketChannel, room);
    }
  }

  @override
  void dispose() {
    webSocketChannel.sink.close();
    super.dispose();
  }

  Future<Authentication> getAuthentication() async {
    final AuthenticationService authenticationService =
        AuthenticationService(rocketHttpService);
    return await authenticationService.login(username, password);
  }
}

更多关于Flutter即时通讯插件rocket_chat_connector_flutter的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

Harmonyos Next教程
1 回复

更多关于Flutter即时通讯插件rocket_chat_connector_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，下面是一个关于如何使用 rocket_chat_connector_flutter 插件在 Flutter 中实现即时通讯功能的示例代码。这个示例展示了如何连接到 Rocket.Chat 服务器、认证用户以及发送和接收消息。

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

dependencies:
  flutter:
    sdk: flutter
  rocket_chat_connector_flutter: ^最新版本号 # 请替换为最新版本号

然后，运行 flutter pub get 来获取依赖。

接下来，是一个基本的 Flutter 应用示例，它使用 rocket_chat_connector_flutter 插件连接到 Rocket.Chat 服务器：

import 'package:flutter/material.dart';
import 'package:rocket_chat_connector_flutter/rocket_chat_connector.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Rocket.Chat Connector Example'),
        ),
        body: RocketChatExample(),
      ),
    );
  }
}

class RocketChatExample extends StatefulWidget {
  @override
  _RocketChatExampleState createState() => _RocketChatExampleState();
}

class _RocketChatExampleState extends State<RocketChatExample> {
  RocketChatClient? client;
  String? userId;
  String? authToken;
  List<Map<String, dynamic>>? messages;

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

  Future<void> connectToRocketChat() async {
    try {
      // 配置 Rocket.Chat 服务器信息
      final serverUrl = 'https://your-rocket-chat-server.com';
      final username = 'your-username';
      final password = 'your-password';

      // 创建 RocketChatClient 实例
      client = RocketChatClient(serverUrl);

      // 登录并获取认证信息
      final authResult = await client!.login(username, password);
      userId = authResult.userId;
      authToken = authResult.authToken;

      // 订阅消息
      final subscription = client!.subscribeToMessages(userId!, (event) {
        setState(() {
          messages = event.messages;
        });
      });

      // 确保在组件销毁时取消订阅
      // 注意：这是一个简化的示例，实际使用中应在 dispose 方法中取消订阅
      // subscription.cancel();

    } catch (e) {
      print('Error connecting to Rocket.Chat: $e');
    }
  }

  Future<void> sendMessage() async {
    if (client != null && userId != null && authToken != null) {
      try {
        final roomId = 'room-id-where-you-want-to-send-message'; // 替换为目标聊天室 ID
        final message = 'Hello, Rocket.Chat!';

        await client!.sendMessage(roomId, message);
      } catch (e) {
        print('Error sending message: $e');
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text('User ID: ${userId ?? 'N/A'}'),
          SizedBox(height: 16),
          Text('Messages:'),
          SizedBox(height: 8),
          messages != null
              ? ListView.builder(
                  itemCount: messages!.length,
                  itemBuilder: (context, index) {
                    return ListTile(
                      title: Text(messages![index]['msg'] ?? 'N/A'),
                    );
                  })
              : Text('No messages yet.'),
          SizedBox(height: 32),
          ElevatedButton(
            onPressed: sendMessage,
            child: Text('Send Message'),
          ),
        ],
      ),
    );
  }
}

注意事项

  1. 安全性：在实际应用中，不要将用户名和密码硬编码在代码中。你可以使用更安全的方式，比如环境变量或安全的存储解决方案。

  2. 取消订阅：在上面的示例中，我们注释掉了取消订阅的代码。在实际应用中，你应该在组件销毁时（例如在 dispose 方法中）取消订阅，以避免内存泄漏。

  3. 错误处理：示例中的错误处理较为简单，实际应用中你可能需要更详细的错误处理逻辑。

  4. UI 更新：示例中使用 setState 来更新 UI，这在小型应用中通常是可行的。对于更复杂的应用，你可能需要考虑使用更高级的状态管理库，如 Provider、Riverpod 或 MobX。

这个示例提供了一个基本的框架，你可以根据需要进行扩展和修改。

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