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.
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 :
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,
),
),
);
}
} |
Output :
Complete code is available on github.com/progressIndicator