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how access the element of list using snapshot.data in futurebuilder

Crazy Chicken answered on August 16, 2022 Popularity 1/10 Helpfulness 1/10

answer how access the element of list using snapshot.data in futurebuilder

how access the element of list using snapshot.data in futurebuilder

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import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

Future <List<Data>> fetchData() async {
  final response =
      await http.get('https://jsonplaceholder.typicode.com/albums');
  if (response.statusCode == 200) {
    List jsonResponse = json.decode(response.body);
      return jsonResponse.map((data) => new Data.fromJson(data)).toList();
  } else {
    throw Exception('Unexpected error occured!');
  }
}

class Data {
  final int userId;
  final int id;
  final String title;

  Data({this.userId, this.id, this.title});

  factory Data.fromJson(Map<String, dynamic> json) {
    return Data(
      userId: json['userId'],
      id: json['id'],
      title: json['title'],
    );
  }
}

void main() => runApp(MyApp());

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

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

class _MyAppState extends State<MyApp> {
  Future <List<Data>> futureData;

  @override
  void initState() {
    super.initState();
    futureData = fetchData();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter API and ListView Example',
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter ListView'),
        ),
        body: Center(
          child: FutureBuilder <List<Data>>(
            future: futureData,
            builder: (context, snapshot) {
              if (snapshot.hasData) {
                List<Data> data = snapshot.data;
                return 
                ListView.builder(
                itemCount: data.length,
                itemBuilder: (BuildContext context, int index) {
                  return Container(
                    height: 75,
                    color: Colors.white,
                    child: Center(child: Text(data[index].title),
                  ),);
                }
              );
              } else if (snapshot.hasError) {
                return Text("${snapshot.error}");
              }
              // By default show a loading spinner.
              return CircularProgressIndicator();
            },
          ),
        ),
      ),
    );
  }
}

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: element list using whatever

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Contributed on Aug 16 2022

Crazy Chicken

0 Answers Avg Quality 2/10

how access the element of list using snapshot.data in futurebuilder

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