Filter by Widgets


Show loading while performing an operation in Flutter

This is posted by seven.srikanth at 06-02-2019 06:54:29


In this example, I'm going to share the code which will help you to show a Loader icon when an operation is being performed.
Below is an example code of how to Show loading while performing an operation in Flutter. Code from Main.dart file. In order to run this project locally, all you need to do is to create a Project and copy paste the below code to Lib\main.dart file.
import 'dart:async';
import 'package:flutter/material.dart';
Future<String> 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<String> 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<String>(
future: str,
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text(snapshot.data);
}
else if (snapshot.hasError) {
return Text("${snapshot.error}");
}
// By default, show a loading spinner
return CircularProgressIndicator();
},
),
),
),
);
}
}
Hope this will be useful to you.
Thanks,
Srikanth
0 Comments
Login to comment.
Recent Comments

Be the first to Comment. You can ask a Query or Share your toughts or Just say thanks.




Recent articles

Horizontal List View

Check out this article on Horizontal List View

Read full post

How to get the Width and Height of the Screen in Flutter?

Check out this article on How to get the Width and Height of the Screen in Flutter?

Read full post

How to add a Footer Buttons in Flutter?

Check out this article on How to add a Footer Buttons in Flutter?

Read full post

TextField in Flutter

Check out this article on TextField in Flutter

Read full post

How to Draw a Triangle using Canvas in Flutter?

Check out this article on How to Draw a Triangle using Canvas in Flutter?

Read full post

url_launcher Package - Lets Launch URL, Send Email, Make Call or Send SMS in Flutter

Check out this article on url_launcher Package - Lets Launch URL, Send Email, Make Call or Send SMS in Flutter

Read full post

Error: The name 'RangeSlider' is defined in the libraries 'package:flutter/src/material/range_slider.dart' and 'package:flutter_range_slider/src/flutter_range_slider.dart'.

Check out this article on Error: The name 'RangeSlider' is defined in the libraries 'package:flutter/src/material/range_slider.dart' and 'package:flutter_range_slider/src/flutter_range_slider.dart'.

Read full post

How to create a persistent bottom sheet in Flutter?

Check out this article on How to create a persistent bottom sheet in Flutter?

Read full post

How to draw a Decorative Horizontal line in Flutter?

Check out this article on How to draw a Decorative Horizontal line in Flutter?

Read full post

How to fetch an Image from Internet in Flutter

Check out this article on How to fetch an Image from Internet in Flutter

Read full post

© 2018 - Fluttercentral | Email to me - Seven.srikanth@gmail.com

Except as otherwise noted, this work is licensed under a Creative Commons Attribution 4.0 International License , and code samples are licensed under the BSD License.