如何在Flutter中显示onclick按钮动画布局？

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

class AnimatedButton extends StatefulWidget {
  @override
  _AnimatedButtonState createState() => _AnimatedButtonState();
}

class _AnimatedButtonState extends State<AnimatedButton>
    with SingleTickerProviderStateMixin {
  AnimationController _animationController;
  Animation<double> _animation;

  @override
  void initState() {
    super.initState();
    _animationController = AnimationController(
      vsync: this,
      duration: Duration(milliseconds: 500),
    );
    _animation = Tween<double>(begin: 1, end: 0.8).animate(
      CurvedAnimation(
        parent: _animationController,
        curve: Curves.easeInOut,
      ),
    );
  }

  @override
  void dispose() {
    _animationController.dispose();
    super.dispose();
  }

  void _onTap() {
    if (_animationController.status == AnimationStatus.completed) {
      _animationController.reverse();
    } else {
      _animationController.forward();
    }
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: _onTap,
      child: AnimatedBuilder(
        animation: _animation,
        builder: (context, child) {
          return Transform.scale(
            scale: _animation.value,
            child: Container(
              width: 200,
              height: 50,
              decoration: BoxDecoration(
                color: Colors.blue,
                borderRadius: BorderRadius.circular(25),
              ),
              child: Center(
                child: Text(
                  'Click Me',
                  style: TextStyle(
                    color: Colors.white,
                    fontSize: 18,
                  ),
                ),
              ),
            ),
          );
        },
      ),
    );
  }
}

class AnimatedButtonPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Animated Button'),
      ),
      body: Center(
        child: AnimatedButton(),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: AnimatedButtonPage(),
  ));
}