import ‘dart:convert’;
import ‘package:flutter/material.dart’;
import ‘package:flutter_trip/navigator/tab_navigator.dart’;
import ‘package:http/http.dart’ as http;

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

class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);

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

class _MyAppState extends State {
String? showResult;

Future fetchPost() async {
var url = Uri.http(
‘http://www.devio.org’, ‘/io/flutter_app/json/test_common_model.json’);
final response = await http.get(url);
final result = json.decode(response.body);
return new CommonModel.fromJson(result);
}

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text(‘Http’),
),
body: Column(
children: [
InkWell(
onTap: () {
fetchPost().then((CommonModel value) {
setState(() {
showResult = ‘请求结果：hideAppBar：KaTeX parse error: Expected 'EOF', got '\nicon' at position 19: …lue.hideAppBar}\̲n̲i̲c̲o̲n̲：{value.icon}’;
});
});
},
child: Text(
‘点我’,
style: TextStyle(fontSize: 26),
),
),
Text(showResult!)
],
),
),
);
}
}

class CommonModel {
final String? icon;
final String? title;
final String? url;
final String? statusBarColor;
final bool? hideAppBar;

CommonModel(
{this.icon, this.title, this.url, this.statusBarColor, this.hideAppBar});

factory CommonModel.fromJson(Map<String, dynamic> json) {
return CommonModel(
icon: json[‘icon’],
title: json[‘title’],
url: json[‘url’],
statusBarColor: json[‘statusBarColor’],
hideAppBar: json[‘hideAppBar’]);
}
}

老师您好,一直报这个空安全错误