在flatter中将JSON转换为ListView.builder
我是编程新手，所以请耐心等待我，我正在尝试将此JSON转换为类似此设计的显示方式， 我已经做了JSON解码，但对于示例JSON，所以我理解它是如何工作的，但对于复杂的JSON，我感到困惑，所以我非常感谢任何人的帮助 JSON代码：在flatter中将JSON转换为ListView.builder,json,flutter,android-listview,Json,Flutter,Android Listview,我是编程新手，所以请耐心等待我，我正在尝试将此JSON转换为类似此设计的显示方式， 我已经做了JSON解码，但对于示例JSON，所以我理解它是如何工作的，但对于复杂的JSON，我感到困惑，所以我非常感谢任何人的帮助 JSON代码： [ { "Category": "Gro", "stores": [ { "name": "market",
[
{
"Category": "Gro",
"stores": [
{
"name": "market",
"logo_url": "https://www.google.com/signpost-150x150.png",
"phone_1": "1111111111",
"phone_2": "1111111111",
"location": "https://maps.google.com/location"
},
{
"name": "mall",
"logo_url": "https://www.google.com/signpost-150x150.png",
"phone_1": "1111111111",
"phone_2": "1111111111",
"location": "https://maps.google.com/location"
}
]
},
{
"Category": "Food",
"stores": [
{
"name": "Food Time",
"logo_url": "https://www.google.com/signpost-150x150.png",
"phone_1": "1111111111",
"phone_2": "1111111111",
"location": "https://maps.google.com/location"
},
{
"name": "let's eat",
"logo_url": "https://www.google.com/signpost-150x150.png",
"phone_1": "1111111111",
"phone_2": "1111111111",
"location": "https://maps.google.com/location"
}
]
},
{
"Category": "Personal Care",
"stores": [
{
"name": "Body",
"logo_url": "https://www.google.com/signpost-150x150.png",
"phone_1": "1111111111",
"phone_2": "1111111111",
"location": "https://maps.google.com/location"
},
{
"name": "Hair",
"logo_url": "https://www.google.com/signpost-150x150.png",
"phone_1": "1111111111",
"phone_2": "1111111111",
"location": "https://maps.google.com/location"
}
]
}
]
import 'package:side_menu.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:http/http.dart';
import 'dart:convert';
Future<List> shopsList() async {
Response response = await get('JSON URL');
if (response.statusCode == 200) {
var shopsData = jsonDecode(response.body);
return shopsData;
} else {
print(response.statusCode);
}
}
class ShowShops extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
drawer: SideMenu(),
appBar: AppBar(),
body: Column(
children: [
Expanded(
child: Container(
child: FutureBuilder(
future: shopsList(),
builder: (context, shops) {
if (shops.hasData) {
return ListView.builder(
itemCount: shops.data.length,
itemBuilder: (BuildContext context, int index) {
Map shopInfo = shops.data[index];
String cat = shopInfo[index]['Category'];
return Card(
child: Text(cat),
);
},
);
}
return Center(
child: SpinKitWave(
color: Color(0xff023246),
size: 100,
),
//CircularProgressIndicator(),
);
}),
),
)
],
),
);
}
}
import'package:side_menu.dart'；
进口“包装：颤振/cupertino.dart”；
进口“包装：颤振/材料.省道”；
进口“包装：颤振旋转套件/颤振旋转套件.dart”；
导入“包：http/http.dart”；
导入“dart:convert”；
Future shopsList（）异步{
Response=await-get（'JSON-URL'）；
如果（response.statusCode==200）{
var shopsData=jsonDecode（response.body）；
返回商店数据；
}否则{
打印（响应状态码）；
}
}
类ShowShops扩展了无状态小部件{
@凌驾
小部件构建（构建上下文）{
返回脚手架(
抽屉：侧菜单（），
appBar:appBar（），
正文：专栏(
儿童：[
扩大(
子：容器(
孩子：未来建设者(
future:shopsList（），
建筑商：（背景、商店）{
if（shops.hasData）{
返回ListView.builder(
itemCount:shops.data.length，
itemBuilder:（构建上下文，int索引）{
Map shopInfo=shops.data[索引]；
字符串cat=shopInfo[index]['Category']；
回程卡(
子：文本（cat），
);
},
);
}
返回中心(
孩子：斯宾基特波(
颜色：颜色（0xff023246），
尺码：100，
),
//CircularProgressIndicator（），
);
}),
),
)
],
),
);
}
}
提前感谢您的帮助添加
，“phone_2”：“1111111111”import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: Test(),
);
}
}
class Test extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: FutureBuilder(
future: http.get('https://dc-apps.net/map/services.json'),
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return Center(child: CircularProgressIndicator());
}
List data = json.decode(snapshot.data.body);
// print(data);
List categoriesnames = [];
List stores = [];
data.forEach((element) {
categoriesnames.add(element["Category"]);
stores.add(element['stores']);
});
// return Text('see');
return ListView.builder(
itemCount: data.length,
itemBuilder: (context, index) {
// print(stores[index][index]['name']);
return CardItem(
categoryname: categoriesnames[index],
sotories: stores[index],
);
},
);
},
),
);
}
}
class CardItem extends StatelessWidget {
final String categoryname;
List sotories;
CardItem({this.categoryname, this.sotories});
@override
Widget build(BuildContext context) {
return Container(
child: Expanded(
child: Column(
children: [
Text(categoryname),
SizedBox(
height: 5,
),
ListView.builder(
scrollDirection: Axis.vertical,
shrinkWrap: true,
itemCount: sotories.length,
itemBuilder: (context, index) => ListTile(
title: Text(sotories[index]['name']),
subtitle: Column(
children: [
Text(sotories[index]['phone_1']),
Text(sotories[index]['phone_2']),
],
),
trailing: CircleAvatar(
radius: 50,
backgroundImage: NetworkImage(sotories[index]['logo_url']),
),
),
),
],
),
),
);
}
}
将JSON转换为对象列表并使用列表。