Created
August 9, 2021 18:50
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From a tutorial, this simple app covers getting a JSON response from an HTTP get request and displaying the content in a scrolling ListView.
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| /// NOTE: Need some yamspec.yml to complete from a default configuration. | |
| import 'dart:convert'; | |
| import 'package:flutter/material.dart'; | |
| import 'package:http/http.dart' as http; | |
| import 'dart:async'; | |
| import 'dart:io'; | |
| void main() { | |
| runApp(new MaterialApp(home: new MyApp())); | |
| } | |
| class MyApp extends StatefulWidget { | |
| @override | |
| _State createState() => new _State(); | |
| } | |
| class _State extends State<MyApp> { | |
| Map _countries = new Map(); | |
| void _getData() async { | |
| String url = "http://country.io/names.json"; // as Uri; //Uri.('http://country.io/names.json'); | |
| var response = await http.get(Uri.parse(url)); | |
| if (response.statusCode == 200) { | |
| setState(() => _countries = jsonDecode(response.body)); | |
| var verbose = true; | |
| print('Loaded ${_countries.length} countries.'); | |
| } | |
| } | |
| // This widget is the root of your application. | |
| @override | |
| Widget build(BuildContext context) { | |
| return Scaffold( | |
| appBar: AppBar( | |
| title: Text("Udemy List view"), | |
| ), | |
| body: new Container( | |
| padding: EdgeInsets.all(32.0), | |
| child: new Column( | |
| children: <Widget>[ | |
| Text("${_countries.length} Countries"), | |
| new Expanded( | |
| child: new ListView.builder( | |
| itemCount: _countries.length, | |
| itemBuilder: (BuildContext context, int index) { | |
| String key = _countries.keys.elementAt(index); | |
| return new Row( | |
| children: <Widget>[ | |
| new Text("$key : "), | |
| new Text(_countries[key]) | |
| ] | |
| ); | |
| }, | |
| )) | |
| ], | |
| ), | |
| )); | |
| } | |
| @override | |
| void initState() { | |
| super.initState(); | |
| _getData(); | |
| } | |
| } |
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