Flutter Circular Progress Indicator Example

You can see FULL SECTION this article in this http://camellabs.com/flutter-circular-progress-indicator-example/.

The Example will show about Flutter Circular Progress Indicator Example. This article will creating a simple application using ProgressDialog. You can read other article with flutter in this section :

• Flutter Image Slider Example
• How To Create Listview in Flutter Dynamic

First, we must create a project using Visual Studio Code software with name “progressdialog”. Let’s to create a new project using Visual Studio Code:

1. Invoke View > Command Palette.
2. Type “flutter”, and select the Flutter: New Project.
3. Enter a project name, example such as “progressdialog”, and press Enter.
4. Create or select the parent directory for the new project folder.
5. Wait for project creation progress to complete and the main.dart file to appear.

This example using webview flutter plugin progress_dialog: ^1.2.0. Edit file pubspec.yaml in your directory should look something like and then update progress dialog flutter package.

name: progressdialog
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://www.dartlang.org/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

You must use flutter image slider widget for custom widget, create 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<FirstScreen> {
  ProgressDialog pr;
  @override
  Widget build(BuildContext context) {
    pr = new ProgressDialog(context);
    pr.style(
          message: 'Please Waiting...',
          borderRadius: 10.0,
          backgroundColor: Colors.white,
          progressWidget: CircularProgressIndicator(),
          elevation: 10.0,
          insetAnimCurve: Curves.easeInOut,
          progress: 0.0,
          maxProgress: 100.0,
          progressTextStyle: TextStyle(
            color: Colors.black, fontSize: 13.0, fontWeight: FontWeight.w400),
          messageTextStyle: TextStyle(
            color: Colors.black, fontSize: 19.0, fontWeight: FontWeight.w600)
        );
    return Scaffold(
      body: Center(
        child: RaisedButton(
          child: Text('Show dialog and go to next screen',
              style: TextStyle(color: Colors.white)),
          color: Colors.blueAccent,
          onPressed: () {
            pr.show();
            Future.delayed(Duration(seconds: 3)).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<SecondScreen> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(child: Text('I am second screen')),
    );
  }
}

After finish copy the main.dart, runing application and will show output :

You can see Flutter Circular Progress Indicator Example in Here.

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