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1
2import 'package:flutter/material.dart';
3
4void main() => runApp(MyApp());
5
6class MyApp extends StatelessWidget {
7  @override
8  Widget build(BuildContext context) {
9    return MaterialApp(
10      title: 'Flutter Demo',
11      debugShowCheckedModeBanner: false,
12      theme: ThemeData(
13        primarySwatch: Colors.blue,
14      ),
15      home: const MyHomePage(title: 'Flutter Demo Home Page'),
16    );
17  }
18}
19
20class MyHomePage extends StatefulWidget {
21  final String title;
22
23  const MyHomePage({
24    Key? key,
25    required this.title,
26  }) : super(key: key);
27
28  @override
29  _MyHomePageState createState() => _MyHomePageState();
30}
31
32class _MyHomePageState extends State<MyHomePage> {
33  bool isLoading = false;
34  late TextEditingController nameController;
35
36  void getUserData() {
37   setState(() {
38     isLoading = true;
39   });
40   Future.delayed(const Duration(seconds: 6), () {
41     // Get data from API
42     const name = 'Flutter';
43     nameController = TextEditingController(text: name);
44     setState(() {
45       isLoading = false;
46     });
47   });
48  }
49  
50  @override
51  void initState() {
52    super.initState();
53    getUserData();
54  }
55
56  @override
57  void dispose() {
58    super.dispose();
59    nameController.dispose();
60  }
61
62  @override
63  Widget build(BuildContext context) {
64    return Scaffold(
65      appBar: AppBar(
66        title: Text(widget.title),
67      ),
68      body: Container(
69        alignment: Alignment.center,
70        padding: const EdgeInsets.symmetric(horizontal: 50.0),
71        child: Column(
72          mainAxisAlignment: MainAxisAlignment.center,
73          crossAxisAlignment: CrossAxisAlignment.center,
74          children: [
75            const Text(
76              'User Detail',
77            ),
78            const SizedBox(height: 30.0),
79            if (isLoading) const CircularProgressIndicator(),
80            if (!isLoading) TextField(controller: nameController),
81          ],
82        ),
83      ),
84    );
85  }
86}
87