show loader in flutter code example
Example: flutter show loading spinner when list loading
import 'dart:async';
import 'package:flutter/material.dart';
Future fetchStr() async {
await new Future.delayed(const Duration(seconds: 5), () {});
return 'Hello World';
}
void main() => runApp(MyApp(str: fetchStr()));
class MyApp extends StatelessWidget {
final Future str;
MyApp({Key key, this.str}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Fetch Data Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
appBar: AppBar(
title: Text('Fetch Data Example'),
),
body: Center(
child: FutureBuilder(
future: str,
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text(snapshot.data);
} else if (snapshot.hasError) {
return Text("${snapshot.error}");
}
return CircularProgressIndicator();
},
),
),
),
);
}
}