Flutter功能未定义插件lime的探索使用

好的，我将根据提供的内容和示例代码来整理一个完整的Flutter项目示例，展示如何使用lime插件进行实时消息通信。以下是完整的Flutter项目示例：

Flutter项目结构

 lime_project/
│
├── pubspec.yaml
├── lib/
│   ├── main.dart
│   └── LimeExampleApp.dart
└── assets/
    └── lime_icon.png

pubspec.yaml

name: lime_example_app
description: A simple example app using the Lime messaging library.
version: 1.0.0
environment:
  sdk: '>=2.17.0 <3.0.0'

dependencies:
  flutter:
    sdk: flutter
  lime: ^0.5.0

dev_dependencies:
  flutter_test:
    sdk: flutter

assets:
  - assets/lime_icon.png

main.dart

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

void main() async {
  final transport = WebSocketTransport();
  await transport.open('ws://localhost:55321');

  final clientChannel = ClientChannel(transport);
  await clientChannel.startNewSession();

  // Send a message
  final textMessage = Message(
    type: 'text/plain',
    content: 'Hello, Lime!',
  );
  await clientChannel.sendMessage(textMessage);

  // Listen for messages
  clientChannel.onReceiveMessage.listen((message) {
    print('Received message from ${message.from}: ${message.content}');
  });

  // Listen for notifications
  clientChannel.onReceiveNotification.listen((notification) {
    print('Received notification from ${notification.from}: ${notification.event}');
  });
}

LimeExampleApp.dart

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

class LimeExampleApp extends StatefulWidget {
  @override
  _LimeExampleAppState createState() => _LimeExampleAppState();
}

class _LimeExampleAppState extends State<LimeExampleApp> {
  final transport = WebSocketTransport();
  final clientChannel = ClientChannel(transport);

  void sendMessage() async {
    final textMessage = Message(
      type: 'text/plain',
      content: 'Hello, Lime!',
    );
    await clientChannel.sendMessage(textMessage);
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('LIME Example App'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              ElevatedButton(
                onPressed: sendMessage,
                child: Text('Send Message'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

使用说明

1 1. 安装lime插件：

flutter pub add lime

1. 运行应用：

   flutter run
   

2. 在服务器端运行WebSocket服务（例如使用Node.js）：

   node server.js
   

   const WebSocket = require('ws');
   const lime = require('lime-dart');
   
   const wss = new WebSocket.Server({ port: 55321 });
   
   wss.on('connection', function connection(ws) {
     console.log('Client connected');
   
     ws.send(new lime.Message({
       to: 'client@domain.com',
       type: 'text/plain',
       content: 'Hello, Lime!'
     }));
   
     ws.on('message', function incoming(message) {
       console.log('Received:', message);
     });
   
     ws.on('close', function close() {
       console.log('Closed connection');
     });
   });