How to send json data from on route to another route - json

Question

In my Flutter application, I am trying to pass JSON data from one route to another. The challenge I am facing is how to pass a list as a parameter. The first screen contains a list of JSON data that has been fetched, and I aim to show the complete details of each item when the user clicks on the respective ListTile.
you will find the onTap() in JsonParsingPodo.dart
here's my code :
posts.dart (plain old dart object file)
class PostList {
final List<Post> posts;
PostList({required this.posts});
factory PostList.fromJson(Map<String, dynamic> parsedJson) {
List<dynamic> postsJson = parsedJson['posts'] as List;
List<Post> posts = <Post>[];
posts = postsJson.map((e) => Post.fromJson(e)).toList();
return PostList(posts: posts);
}
}
class Post {
int userId;
int id;
String title;
String body;
Post(
{required this.id,
required this.body,
required this.title,
required this.userId});
factory Post.fromJson(Map<String, dynamic> json) {
return Post(
id: json['id'],
body: json['body'],
title: json['title'],
userId: json['userId']);
}
}
JsonParsingPodo.dart (First Screen)
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:podo_practice/posts.dart';
import 'display.dart';
class JsonParsingPodo extends StatefulWidget {
const JsonParsingPodo({super.key});
#override
State<JsonParsingPodo> createState() => _JsonParsingPodoState();
}
class _JsonParsingPodoState extends State<JsonParsingPodo> {
late Future<PostList> data;
#override
void initState() {
super.initState();
Network network = Network("https://dummyjson.com/posts");
data = network.loadPost();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: const Text("PODO: json"),
),
body: Center(
// ignore: avoid_unnecessary_containers
child: Container(
child: FutureBuilder(
future: data,
builder: (context, AsyncSnapshot<PostList> snapshot) {
List<Post> allposts;
if (snapshot.hasData) {
allposts = snapshot.data!.posts;
return createListView(allposts, context);
}
return const CircularProgressIndicator();
}),
),
));
}
Widget createListView(List<Post> data, BuildContext context) {
return ListView.builder(
itemCount: data.length,
itemBuilder: (context, int index) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Divider(
height: 5.0,
),
ListTile(
title: Text("${data[index].title}"),
subtitle: Text("${data[index].body}"),
leading: Column(
children: <Widget>[
CircleAvatar(
backgroundColor: Colors.green,
radius: 23,
child: Text("${data[index].id}"),
),
],
),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const DisplayData()),
// *what to pass here??*
);
},
),
],
);
});
}
}
class Network {
final String url;
Network(this.url);
Future<PostList> loadPost() async {
final response = await get(Uri.parse(Uri.encodeFull(url)));
if (response.statusCode == 200) {
//ok
return PostList.fromJson(json.decode(response.body));
} else {
throw Exception("Failed to load data. ");
}
}
}
DisplayData.dart (Second Screen)
import 'package:flutter/material.dart';
import 'package:podo_practice/posts.dart';
class DisplayData extends StatefulWidget {
const DisplayData({super.key});
#override
State<DisplayData> createState() => _DisplayDataState();
}
class _DisplayDataState extends State<DisplayData> {
late Future<PostList> data;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: const Text("Display Post"),
),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Card(
child: Column(
children: [
// Text(data);
],
),
),
),
);
}
}
I have recently started learning Flutter and don't have much knowledge. I tried reading articles on Stack Overflow about this thing, but I didn't understand much. So, I have decided to post a question for help. Please assist me in completing the following code.
On the "Display Data" page, I need to display the **title **and its **description **when the user clicks on the ListItem.

Answer 1

onListile tap send particular object using index
Widget createListView(List<Post> data, BuildContext context) {
return ListView.builder(
itemCount: data.length,
itemBuilder: (context, int index) {
Post post = data[index]
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Divider(
height: 5.0,
),
ListTile(
title: Text("${data[index].title}"),
subtitle: Text("${data[index].body}"),
leading: Column(
children: <Widget>[
CircleAvatar(
backgroundColor: Colors.green,
radius: 23,
child: Text("${data[index].id}"),
),
],
),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => const DisplayData(post:post)),
// *what to pass here??*
);
},
),
],
);
});
}
}
get post on constructor to display
import 'package:flutter/material.dart';
import 'package:podo_practice/posts.dart';
class DisplayData extends StatefulWidget {
final Post post;
const DisplayData({super.key,required this.post});
#override
State<DisplayData> createState() => _DisplayDataState();
}
class _DisplayDataState extends State<DisplayData> {
late Future<PostList> data;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: const Text("Display Post"),
),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Card(
child: Column(
children: [
// Text(data);
],
),
),
),
);
}
}