ProgressIndicator in Flutter

Flutter CircularProgressIndicator is a material widget that indicates that the application is busy. Firstly, we create a new project using Visual Studio Code(IDE) with the name “progressindicator”. You can choose any name.

Steps:

1. Invoke View > Command Palette.

2. Type “flutter”, and select the Flutter: New Project.

3. Enter a project name and press Enter.

4. Create the parent directory for the new project folder.



ProgressIndicator in Flutter

Update plugin progress_dialog: ^1.2.0 in pubspec.yaml directory should look something like below

name: progressindicator
description: A new Flutter project.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString 
# while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General
        /Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2
  progress_dialog: ^1.2.0

dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

Now update the progress dialog flutter package.

Create a file with name main.dart like below :

Dart

filter_none

edit
close

play_arrow

link
brightness_4
code

import 'package:flutter/material.dart';
import 'package:progress_dialog/progress_dialog.dart';
   
ProgressDialog pr;
   
void main() {
  runApp(MaterialApp(
    home: FirstScreen(),
  ));
}
   
class FirstScreen extends StatefulWidget {
  @override
  _FirstScreenState createState() => _FirstScreenState();
}
   
class _FirstScreenState extends State {
  ProgressDialog pr;
   
  @override
  // Add the CSS details of the page
  Widget build(BuildContext context) {
    pr = new ProgressDialog(context);
    pr.style(
          message: 'processing',
          borderRadius: 8.0,
          backgroundColor: Colors.white,
          progressWidget: CircularProgressIndicator(),
          elevation: 8.0,
          insetAnimCurve: Curves.easeInOut,
          progress: 0.0,
          maxProgress: 100.0,
          progressTextStyle: TextStyle(
            color: Colors.white, fontSize: 13.0,
            fontWeight: FontWeight.w400),
          messageTextStyle: TextStyle(
            color: Colors.white, fontSize: 19.0,
            fontWeight: FontWeight.w600)
        );
   
    return Scaffold(
      appBar: AppBar(
        // Define the design
          title: const Text('GeeksForGeeks'),
          backgroundColor: Colors.green,),
      body: Center(
          
        child: RaisedButton(
          child: Text('Click here..',
              style: TextStyle(color: Colors.white)),
          color: Colors.green,
          onPressed: () {
            pr.show();
            Future.delayed(Duration(seconds: 2)).then((value) {
              pr.hide().whenComplete(() {
                Navigator.of(context).push(MaterialPageRoute(
                    builder: 
                  (BuildContext context) => SecondScreen()));
              });
            });
          },
        ),
      ),
    );
  }
}
   
class SecondScreen extends StatefulWidget {
  @override
  _SecondScreenState createState() => _SecondScreenState();
}
   
class _SecondScreenState extends State {
  @override
  // Define the child 
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: RaisedButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text('Back',
              style: TextStyle(color: Colors.white)),
          color: Colors.green,
        ),
      ),
    );
  }
}

chevron_right


Output :

Complete code is available on github.com/progressIndicator




My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.


Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.