2 Ways to Create Flipping Card Animation in Flutter

Last updated on September 15, 2021 A Goodman Loading... Post a comment

This article walks you through two complete examples of making flipping card animation in Flutter. The first example implements things from scratch and the second one uses a third-party package. Without any further ado, let’s get our hands dirty.

Some images used in the examples are from Pixabay, under the Pixabay License.

Using Self-Written Code

This example creates flipping card effects by using the Transform widget. If this widget is new to you, this article can help you get familiar with it.

Preview

The demo app we are going to build displays two cards that conceal some secrets. You can expose the things behind the masks by pressing the Reveal The Secrets button. The top card presents a horizontal flipping animation and the bottom one demonstrates a vertical flipping animation.

The Complete Code

// main.dart
import 'package:flutter/material.dart';
import 'dart:math';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        // Remove the debug banner
        debugShowCheckedModeBanner: false,
        title: 'Kindacode.com',
        theme: ThemeData(
          primarySwatch: Colors.amber,
        ),
        home: HomePage());
  }
}

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

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

class _HomePageState extends State with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation _animation;
  AnimationStatus _status = AnimationStatus.dismissed;

  @override
  void initState() {
    super.initState();
    _controller =
        AnimationController(vsync: this, duration: Duration(seconds: 1));
    _animation = Tween(end: 1.0, begin: 0.0).animate(_controller)
      ..addListener(() {
        setState(() {});
      })
      ..addStatusListener((status) {
        _status = status;
      });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Kindacode.com'),
      ),
      body: Center(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            SizedBox(
              height: 30,
            ),
            // Horizontal Flipping
            Transform(
              alignment: FractionalOffset.center,
              transform: Matrix4.identity()
                ..setEntry(3, 2, 0.0015)
                ..rotateY(pi * _animation.value),
              child: Card(
                child: _animation.value <= 0.5
                    ? Container(
                        color: Colors.deepOrange,
                        width: 240,
                        height: 300,
                        child: Center(
                            child: Text(
                          '?',
                          style: TextStyle(fontSize: 100, color: Colors.white),
                        )))
                    : Container(
                        width: 240,
                        height: 300,
                        color: Colors.grey,
                        child: Image.network(
                          'https://www.kindacode.com/wp-content/uploads/2021/09/girl.jpeg',
                          fit: BoxFit.cover,
                        )),
              ),
            ),
            // Vertical Flipping
            SizedBox(
              height: 30,
            ),
            Transform(
              alignment: FractionalOffset.center,
              transform: Matrix4.identity()
                ..setEntry(3, 2, 0.0015)
                ..rotateX(pi * _animation.value),
              child: Card(
                child: _animation.value <= 0.5
                    ? Container(
                        color: Colors.deepPurple,
                        width: 240,
                        height: 300,
                        child: Center(
                            child: Text(
                          '?',
                          style: TextStyle(fontSize: 100, color: Colors.white),
                        )))
                    : Container(
                        width: 240,
                        height: 300,
                        color: Colors.grey,
                        child: RotatedBox(
                          quarterTurns: 2,
                          child: Image.network(
                            'https://www.kindacode.com/wp-content/uploads/2021/09/flower.jpeg',
                            fit: BoxFit.cover,
                          ),
                        )),
              ),
            ),
            ElevatedButton(
                onPressed: () {
                  if (_status == AnimationStatus.dismissed) {
                    _controller.forward();
                  } else {
                    _controller.reverse();
                  }
                },
                child: Text('Reveal The Secrets'))
          ],
        ),
      ),
    );
  }
}

Using a 3rd Plugin

Writing code from scratch may be cumbersome and time-consuming. If you want to get the job done quickly and neatly then using a pre-made widget from a plugin is a good option. The example below uses a great package named flip_card.

Preview

The Code

1. Add the plugin to your project:

flutter pub add flip_card

You might need to run:

flutter pub get

To get the plugin installed.

2. Implement the FlipCard widget provided by the plugin:

Center(
        child: FlipCard(
          direction: FlipDirection.HORIZONTAL, 
          front: Container(
            width: 300,
            height: 400,
            color: Colors.red,
          ),
          back: Container(
            width: 300,
            height: 400,
            color: Colors.blue,
          ),
        ),
      ),

Conclusion

We’ve gone through a few examples of implementing flipping effects in an app. If you’d like to explore more about animations and other stuff in Flutter, take a look at the following articles:

You can also take a tour around our Flutter topic page and Dart topic page to see the latest tutorials and examples.

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