flutter|flutter websocket 客户端
1、pubspec文件管理Flutter应用程序的assets(资源，如图片、package等)。 在pubspec.yaml中，通过网址“https://pub.dartlang.org/packages/web_socket_channel”确认版本号后，将web_socket_channel （1.0.9或更高版本）添加到依赖项列表。
2、在Android Studio的编辑器视图中查看pubspec时，单击右上角的 Packages get，或者在命令行输入“flutter packages get”；这会将依赖包安装到您的项目。
【flutter|flutter websocket 客户端】3、运行以下代码
import 'package:flutter/foundation.dart';
import 'package:web_socket_channel/io.dart';
import 'package:flutter/material.dart';
import 'package:web_socket_channel/web_socket_channel.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget{
@override
Widget build(BuildContext context){
final title = 'WebSocket Demo';
return new MaterialApp(
title:title,
home: new MyHomePage(
title: title,
channel: new IOWebSocketChannel.connect('ws://echo.websocket.org'),//如果是本地直接使用IP地址而非localhost或127.0.0.1
),
);
}
}class MyHomePage extends StatefulWidget{
final String title;
final WebSocketChannel channel;
MyHomePage({Key key,@required this.title,@required this.channel}): super(key: key);
@override
_MyHomePageState createState()=> new _MyHomePageState();
}class _MyHomePageState extends State{
TextEditingController _controller = new TextEditingController();
@override
Widget build(BuildContext context){
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Padding(
padding: const EdgeInsets.all(20.0),
child: new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
new Form(
child: new TextFormField(
controller: _controller,
decoration: new InputDecoration(labelText: 'Send a message'),
),
),
new StreamBuilder(
stream: widget.channel.stream,
builder: (context, snapshot){
return new Padding(
padding: const EdgeInsets.symmetric(vertical: 24.0),
child: new Text(snapshot.hasData?'${snapshot.data}':''),
);
}),
],
),
),
floatingActionButton: new FloatingActionButton(
onPressed: _sendMessage,
tooltip: 'Send message',
child: new Icon(Icons.send),
),
);
}
void _sendMessage(){
if (_controller.text.isNotEmpty){
widget.channel.sink.add(_controller.text);
print("send message completed");
}
}
@override
void dispose(){
widget.channel.sink.close();
super.dispose();
}
}
推荐阅读
- Flutter的ListView
- spring|spring boot项目启动websocket
- 运用flutter|运用flutter 构建一个发布版（release）APK
- Flutter自定义view|Flutter自定义view —— 闯关进度条
- WebSocket|WebSocket 语法解析
- thinkphp3.2下实现阿里云视频点播实例（客户端JavaScript上传）
- Flutter|Flutter SwiftUI React 对比
- flutter设置沉浸式状态栏
- Websocket和Socket.io的区别及应用
- 2019-12-02|2019-12-02 flutter的环境配置