Flutter网络代理配置插件network_proxy的使用

Flutter网络代理配置插件network_proxy的使用

简介

network_proxy 是一个支持获取和设置网络代理状态的插件项目。该插件可以帮助开发者在 Flutter 应用中管理和控制设备的网络代理设置。

使用步骤

1. 初始化插件

首先，在 Flutter 项目中引入 network_proxy 插件。可以通过在 pubspec.yaml 文件中添加以下依赖：

dependencies:
  network_proxy: ^最新版本号

然后运行 flutter pub get 来安装依赖。

2. 获取平台版本

在初始化插件时，可以获取当前平台的版本信息。以下是一个简单的示例代码：

import 'dart:io';

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

import 'package:flutter/services.dart';
import 'package:network_proxy/network_proxy.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _networkProxyPlugin = NetworkProxy();

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

  // 获取平台版本
  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await _networkProxyPlugin.getPlatformVersion() ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Text('Running on: $_platformVersion\n'),
        ),
      ),
    );
  }
}

3. 获取当前代理配置

可以通过调用 getProxy() 方法来获取当前的代理配置。以下是一个完整的示例代码：

TextButton(
  child: const Text('Get Proxy'),
  onPressed: () async {
    final proxy = NetworkProxy();
    final confList = await proxy.getProxy();
    confList.removeWhere((element) => !element.enable);
    for (final e in confList) {
      print("item $e");
    }
    print("getProxy $confList");
  },
)

4. 设置代理配置

可以通过调用 setProxy() 方法来设置新的代理配置。以下是一个完整的示例代码：

TextField(
  controller: _hostInput,
),
TextField(
  inputFormatters: [
    FilteringTextInputFormatter.allow(RegExp(r'\d+'))
  ],
  controller: _portInput,
),
TextButton(
  child: const Text('Set Proxy'),
  onPressed: () async {
    final proxy = NetworkProxy();
    final result = await proxy.setProxy(
      NetworkProxyConf(
        true,
        NetworkProxyType.http,
        _hostInput.text,
        int.parse(_portInput.text),
        name: 'iPhone USB',
      ),
    );
    print("setProxy $result");
  },
)

完整示例代码

以下是一个完整的示例代码，展示了如何使用 network_proxy 插件来获取和设置代理配置：

import 'dart:io';

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

import 'package:flutter/services.dart';
import 'package:network_proxy/network_proxy.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _networkProxyPlugin = NetworkProxy();
  final _hostInput = TextEditingController(text: '127.0.0.1');
  final _portInput = TextEditingController(text: '10808');
  NetworkProxyType _type = NetworkProxyType.socks;

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

  // 获取平台版本
  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await _networkProxyPlugin.getPlatformVersion() ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            children: [
              Text('Running on: $_platformVersion\n'),
              DropdownButton<NetworkProxyType>(
                value: _type,
                items: NetworkProxyType.values
                    .map(
                      (e) => DropdownMenuItem(
                        value: e,
                        child: Text(e.name),
                      ),
                    )
                    .toList(),
                onChanged: (value) {
                  if (value == null) return;
                  _type = value;
                },
              ),
              TextField(
                controller: _hostInput,
              ),
              TextField(
                inputFormatters: [
                  FilteringTextInputFormatter.allow(RegExp(r'\d+'))
                ],
                controller: _portInput,
              ),
              Row(
                children: [
                  TextButton(
                    child: const Text('Get Proxy'),
                    onPressed: () async {
                      final proxy = NetworkProxy();
                      final confList = await proxy.getProxy();
                      confList.removeWhere((element) => !element.enable);
                      for (final e in confList) {
                        print("item $e");
                      }
                      print("getProxy $confList");
                    },
                  ),
                  TextButton(
                    child: const Text('Set Proxy'),
                    onPressed: () async {
                      final proxy = NetworkProxy();
                      final result = await proxy.setProxy(
                        NetworkProxyConf(
                          true,
                          NetworkProxyType.http,
                          _hostInput.text,
                          int.parse(_portInput.text),
                          name: 'iPhone USB',
                        ),
                      );
                      print("setProxy $result");
                    },
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}