Introduction:

Loading animations are essential UI elements in mobile apps to indicate to users that a process is in progress. In Flutter, you can easily implement loading animations using various packages available. In this guide, we’ll walk you through the process of integrating a loading animation into your Flutter app using the loading_animation package.

Content:

Step 1: Install the `loading_animation` Package

Add the loading_animation package to your pubspec.yaml file:

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dependencies:
  flutter:
    sdk: flutter
  loading_animation: ^1.0.0

Then, run the following command in your terminal to fetch the package:

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flutter pub get

Step 2: Import the Required Libraries

In the Dart file where you want to implement the loading animation, import the necessary libraries:

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import 'package:flutter/material.dart';
import 'package:loading_animation/loading_animation.dart';

Step 3: Implement the Loading Animation Widget

Inside the build method of your widget, create a LoadingAnimation widget:

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LoadingAnimation(
  size: 50, // Adjust the size of the loading animation as needed
),

Step 4: Customize the Loading Animation

Customize the loading animation by adjusting parameters such as size, color, duration, etc., according to your app’s design requirements.

Step 5: Integrate the Loading Animation into Your App

Place the LoadingAnimation widget in the desired location within your app’s UI hierarchy.

Step 6: Test the Loading Animation

Save your changes and run the app on a device or emulator. Verify that the loading animation is displayed correctly.

Step 7: Run the Application

Run your Flutter application on a device or emulator using the following command in your terminal:

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flutter run

Once the application is launched, you should see the loading animation displayed on the screen, indicating that some process is in progress.

Sample Code:

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// ignore_for_file: prefer_const_constructors, camel_case_types

import 'package:flutter/material.dart';
import 'package:loading_animation_widget/loading_animation_widget.dart';

const Color _kAppColor = Color(0xFFFDDE6F);
const double _kSize = 70;

class loadingAnimation extends StatefulWidget {
  const loadingAnimation({Key? key}) : super(key: key);

  @override
  _loadingAnimationState createState() => _loadingAnimationState();
}

class _loadingAnimationState extends State<loadingAnimation> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        automaticallyImplyLeading: false,
        elevation: 1,
        backgroundColor: Colors.blue[200],
        centerTitle: true,
        title: Text(
          "loading animation",
          style: TextStyle(color: Colors.white),
        ),
      ),
      body: MyGridView(),
    );
  }
}

class AppBody {
  final String title;
  final Widget widget;
  AppBody(
    this.title,
    this.widget,
  );
}

final listOfAnimations = <AppBody>[
  AppBody(
    'inkDrop',
    LoadingAnimationWidget.inkDrop(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'twistingDots',
    LoadingAnimationWidget.twistingDots(
      leftDotColor: const Color(0xFF1A1A3F),
      rightDotColor: const Color(0xFFEA3799),
      size: _kSize,
    ),
  ),
  AppBody(
    'threeRotatingDots',
    LoadingAnimationWidget.threeRotatingDots(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'staggeredDotsWave',
    LoadingAnimationWidget.staggeredDotsWave(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'fourRotatingDots',
    LoadingAnimationWidget.fourRotatingDots(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'fallingDot',
    LoadingAnimationWidget.fallingDot(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'prograssiveDots',
    LoadingAnimationWidget.prograssiveDots(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'discreteCircle',
    LoadingAnimationWidget.discreteCircle(color: Colors.white, size: _kSize, secondRingColor: Colors.black, thirdRingColor: Colors.purple),
  ),
  AppBody(
    'threeArchedCircle',
    LoadingAnimationWidget.threeArchedCircle(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'bouncingBall',
    LoadingAnimationWidget.bouncingBall(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'flickr',
    LoadingAnimationWidget.flickr(
      leftDotColor: const Color(0xFF0063DC),
      rightDotColor: const Color(0xFFFF0084),
      size: _kSize,
    ),
  ),
  AppBody(
    'hexagonDots',
    LoadingAnimationWidget.hexagonDots(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'beat',
    LoadingAnimationWidget.beat(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'twoRotatingArc',
    LoadingAnimationWidget.twoRotatingArc(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'horizontalRotatingDots',
    LoadingAnimationWidget.horizontalRotatingDots(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'newtonCradle',
    LoadingAnimationWidget.newtonCradle(
      color: Colors.white,
      size: 2 * _kSize,
    ),
  ),
  AppBody(
    'stretchedDots',
    LoadingAnimationWidget.stretchedDots(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'halfTriangleDot',
    LoadingAnimationWidget.halfTriangleDot(
      color: Colors.white,
      size: _kSize,
    ),
  ),
  AppBody(
    'dotsTriangle',
    LoadingAnimationWidget.dotsTriangle(
      color: Colors.white,
      size: _kSize,
    ),
  ),
];
final List<Color?> colorList = [
  Colors.lightBlue[200],
  Colors.pink[200],
  Colors.lightGreen[200],
  Colors.amber[200],
  Colors.orange[200],
  Colors.purple[200],
  Colors.teal[200],
  Colors.indigo[200],
  Colors.deepOrange[200],
  Colors.pink[200],
  Colors.lightBlue[200],
  Colors.pink[200],
  Colors.lightGreen[200],
  Colors.amber[200],
  Colors.orange[200],
  Colors.purple[200],
  Colors.teal[200],
  Colors.indigo[200],
  Colors.deepOrange[200],
  Colors.pink[200],
  Colors.lightBlue[200],
  Colors.pink[200],
  Colors.lightGreen[200],
  Colors.amber[200],
  Colors.orange[200],
  Colors.purple[200],
  Colors.teal[200],
  Colors.indigo[200],
  Colors.deepOrange[200],
  Colors.pink[200],
];

class MyGridView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GridView.builder(
      itemCount: listOfAnimations.length,
      padding: EdgeInsets.symmetric(vertical: 10),
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: 2,
        crossAxisSpacing: 10.0,
        mainAxisSpacing: 10.0,
      ),
      itemBuilder: (BuildContext context, int index) {
        final animation = listOfAnimations[index];
        return GridTile(
          child: Container(
            color: colorList[index],
            child: Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text(
                    animation.title,
                    textAlign: TextAlign.center,
                    style: TextStyle(fontSize: 16, color: Colors.black, fontWeight: FontWeight.bold),
                  ),
                  SizedBox(
                    height: 8,
                  ),
                  Container(
                    child: animation.widget,
                  )
                ],
              ),
            ),
          ),
        );
      },
    );
  }
}

Output:

Conclusion:

Congratulations! You have successfully implemented a loading animation in your Flutter app using the loading_animation package. Loading animations are crucial for providing feedback to users during asynchronous operations, enhancing the overall user experience of your app.

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