can you please help with parsing this json ? #8
Description
hi, may i ask you to help me please to parse this json in this url ,
http://opml.radiotime.com/Browse.ashx?render=json&c=podcast
my code is here, so what i did wrong please ?
import 'dart:convert';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
Future<List<Children>> fetchsprodcasts(http.Client client) async {
final response =
await client.get("http://opml.radiotime.com/Browse.ashx?render=json&c=podcast", headers: {'Content-Type': 'application/json; charset=utf-8'});
return compute(parseProdcasts,utf8.decode(response.bodyBytes));
}
List<Children> parseProdcasts(String responseBody) {
final parsed = jsonDecode(responseBody)['body'].map((item)=> item['children']).toList().expand((x) => x).toList();
return parsed.map((m) => new Children.fromJson(m)).toList();
}
class Prodcasts {
Head head;
List<Body> body;
Prodcasts({this.head, this.body});
Prodcasts.fromJson(Map<String, dynamic> json) {
head = json['head'] != null ? new Head.fromJson(json['head']) : null;
if (json['body'] != null) {
body = new List<Body>();
json['body'].forEach((v) {
body.add(new Body.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
if (this.head != null) {
data['head'] = this.head.toJson();
}
if (this.body != null) {
data['body'] = this.body.map((v) => v.toJson()).toList();
}
return data;
}
}
class Head {
String title;
String status;
Head({this.title, this.status});
Head.fromJson(Map<String, dynamic> json) {
title = json['title'];
status = json['status'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['title'] = this.title;
data['status'] = this.status;
return data;
}
}
class Body {
String element;
String text;
List<Children> children;
Body({this.element, this.text, this.children});
Body.fromJson(Map<String, dynamic> json) {
element = json['element'];
text = json['text'];
if (json['children'] != null) {
children = new List<Children>();
json['children'].forEach((v) {
children.add(new Children.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['element'] = this.element;
data['text'] = this.text;
if (this.children != null) {
data['children'] = this.children.map((v) => v.toJson()).toList();
}
return data;
}
}
class Children {
String element;
String type;
String text;
String uRL;
String guideId;
Children({this.element, this.type, this.text, this.uRL, this.guideId});
Children.fromJson(Map<String, dynamic> json) {
element = json['element'];
type = json['type'];
text = json['text'];
uRL = json['URL'];
guideId = json['guide_id'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['element'] = this.element;
data['type'] = this.type;
data['text'] = this.text;
data['URL'] = this.uRL;
data['guide_id'] = this.guideId;
return data;
}
}
void main() {
runApp(ParseProdcastss());
}
class ParseProdcastss extends StatelessWidget {
@override
Widget build(BuildContext context) {
return ParseProdcasts();
}
}
class ParseProdcasts extends StatelessWidget {
ParseProdcasts({Key key}) : super(key: key);
@override
Widget build(BuildContext context) {
return FutureBuilder<List<Children>>(
future: fetchsprodcasts(http.Client()),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? ProdcastsList(childrenList: snapshot.data) :Container(
color: Colors.white,
child: Center(child: new CircularProgressIndicator(
backgroundColor: Color(0xff193451),
valueColor: AlwaysStoppedAnimation<Color>(Colors.blueGrey),
)),
);
},
);
}
}
class ProdcastsList extends StatefulWidget {
List<Children> childrenList = []; // We assume that you filled this list with children.
ProdcastsList({Key key, this.childrenList}) : super(key: key);
@override
_ProdcastsListState createState() => _ProdcastsListState();
}
class _ProdcastsListState extends State<ProdcastsList> {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
backgroundColor: Colors.blueGrey,
body: Container(
color: Colors.blueGrey,
child: Column(
children: [
Expanded(
child: ListView.builder(
physics: ClampingScrollPhysics(),
shrinkWrap: true,
itemCount: widget.childrenList.length,
itemBuilder: (context, index) {
return ExpansionTile(
backgroundColor: Colors.grey.shade200,
children: <Widget>[
],
title: Text('${widget.childrenList[index].text}',style: TextStyle(fontSize: 12, color: Colors.blueGrey),),
subtitle: Text(''),
);
},
),
),
],
),
),
),
);
}
}