dio版本是4.0.6设置方法

import 'package:dio/adapter.dart';import 'package:dio/dio.dart';Dio dio = Dio();//网络代理设置方法(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate =        (HttpClient client) {      client.badCertificateCallback =          (X509Certificate cert, String host, int port) => true;      client.findProxy = (uri) {        // 代理,这里localhost:888须要依据理论状况设置相应代理地址        String proxy = 'PROXY localhost:8888';        debugPrint('flutter_proxy $proxy');        return proxy;      };    };

dio版本5.0.1设置方法

import 'package:dio/io.dart';void initAdapter() {  dio.httpClientAdapter = IOHttpClientAdapter()..onHttpClientCreate = (client) {    // Config the client.    client.findProxy = (uri) {      // Forward all request to proxy "localhost:8888".      return 'PROXY localhost:8888';    };    // You can also create a new HttpClient for Dio instead of returning,    // but a client must being returned here.    return client;  };}