我是Flutter应用程序开发的新手,我不知道这里发生了什么
请帮助我解决此错误
E / flutter(23790):[错误:flutter / lib / ui / ui_dart_state.cc(148)] 未处理的异常:SocketException:连接失败(操作系统错误: 网络无法访问,errno = 101)
---------------------------------- web3连接代码如下-------- ---------------------------------------
import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:web3dart/web3dart.dart';
import 'dart:async';
const String rpcUrls = 'http://62.20.4.514:8547';
class HomeScreen extends StatefulWidget {
@override
State<StatefulWidget> createState() {
return _HomeScreenState();
}
}
class _HomeScreenState extends State<HomeScreen> {
@override
void initState() {
main();
super.initState();
}
main(){
var httpClient = new Client();
var ethClient = new Web3Client(apiUrls, httpClient);
print(ethClient.getBlockNumber());
}
让我知道我是否在编码方面犯了一些错误,或者帮助我如何在波动中使用web3连接
答案 0 :(得分:0)
我仍然不知道为什么该解决方案有效,但是我遇到了同样的问题,我尝试用服务器的IP地址(例如localhost
)替换192.168.1.33
。奏效了!。
为您的应用尝试以下代码:
main(){
var httpClient = new Client();
// You tried the code below and it didn't work
// var ethClient = new Web3Client('http://localhost:8545', httpClient);
// Try this code instead. (Replace "192.168.1.33" with the IP of your server)
var ethClient = new Web3Client('http://192.168.1.33:8545', httpClient);
print(ethClient.getBlockNumber());
}