Flutter即时通讯插件tdproto_dart的使用

tdproto_dart

Autogenerated Tada API data types for dart.

• Autogenerated by tdproto from go code.
• Powered by freezed, includes all its features.
• Synced with server data types structure and documentation.
• Has a big brother for TypeScript - tdproto-ts.

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使用 Flutter 实现即时通讯功能

在本示例中，我们将展示如何使用 tdproto_dart 插件来实现一个简单的即时通讯应用。此示例将包括初始化、登录、发送消息和接收消息的基本步骤。

步骤 1: 添加依赖

首先，在你的 pubspec.yaml 文件中添加 tdproto_dart 依赖：

dependencies:
  tdproto_dart: ^最新版本号

然后运行 flutter pub get 来安装依赖。

步骤 2: 初始化客户端

在你的 main.dart 文件中初始化 TdProtoClient：

import 'package:tdproto_dart/tdproto_dart.dart';

void main() async {
  // 初始化 TdProtoClient
  final client = TdProtoClient(
    host: 'api.tada.team', 
    token: 'your_token_here', 
  );

  // 连接到服务器
  await client.connect();

  runApp(MyApp(client: client));
}

步骤 3: 登录用户

在你的 MyApp 类中实现登录逻辑：

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

class MyApp extends StatefulWidget {
  final TdProtoClient client;

  MyApp({required this.client});

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

class _MyAppState extends State<MyApp> {
  String _username = '';
  String _password = '';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('即时通讯应用')),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            children: [
              TextField(
                decoration: InputDecoration(labelText: '用户名'),
                onChanged: (value) => _username = value,
              ),
              TextField(
                decoration: InputDecoration(labelText: '密码'),
                obscureText: true,
                onChanged: (value) => _password = value,
              ),
              ElevatedButton(
                onPressed: () async {
                  try {
                    // 登录用户
                    await widget.client.login(
                      email: _username,
                      password: _password,
                    );
                    print('登录成功');
                  } catch (e) {
                    print('登录失败: $e');
                  }
                },
                child: Text('登录'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

步骤 4: 发送消息

在登录成功后，我们可以发送消息。这里我们添加一个按钮来发送消息：

ElevatedButton(
  onPressed: () async {
    try {
      // 发送消息
      await widget.client.sendMessage(
        receiverId: 'receiver_id_here',
        text: 'Hello, world!',
      );
      print('消息发送成功');
    } catch (e) {
      print('发送消息失败: $e');
    }
  },
  child: Text('发送消息'),
)

步骤 5: 接收消息

为了接收消息，我们需要监听消息事件：

@override
void initState() {
  super.initState();
  // 监听消息事件
  widget.client.onMessage.listen((message) {
    print('收到消息: ${message.text}');
  });
}

完整示例代码

以下是完整的 main.dart 文件示例：

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

void main() async {
  final client = TdProtoClient(
    host: 'api.tada.team', 
    token: 'your_token_here', 
  );

  await client.connect();
  runApp(MyApp(client: client));
}

class MyApp extends StatefulWidget {
  final TdProtoClient client;

  MyApp({required this.client});

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

class _MyAppState extends State<MyApp> {
  String _username = '';
  String _password = '';

  @override
  void initState() {
    super.initState();
    // 监听消息事件
    widget.client.onMessage.listen((message) {
      print('收到消息: ${message.text}');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('即时通讯应用')),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            children: [
              TextField(
                decoration: InputDecoration(labelText: '用户名'),
                onChanged: (value) => _username = value,
              ),
              TextField(
                decoration: InputDecoration(labelText: '密码'),
                obscureText: true,
                onChanged: (value) => _password = value,
              ),
              ElevatedButton(
                onPressed: () async {
                  try {
                    await widget.client.login(
                      email: _username,
                      password: _password,
                    );
                    print('登录成功');
                  } catch (e) {
                    print('登录失败: $e');
                  }
                },
                child: Text('登录'),
              ),
              ElevatedButton(
                onPressed: () async {
                  try {
                    await widget.client.sendMessage(
                      receiverId: 'receiver_id_here',
                      text: 'Hello, world!',
                    );
                    print('消息发送成功');
                  } catch (e) {
                    print('发送消息失败: $e');
                  }
                },
                child: Text('发送消息'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}

通过以上步骤，你就可以使用 tdproto_dart 插件在 Flutter 应用中实现基本的即时通讯功能了。