如何设置AnimatedContainer动画以填充所有可用空间

import 'package:flutter/material.dart';

class MyAnimatedContainer extends StatefulWidget {
  @override
  _MyAnimatedContainerState createState() => _MyAnimatedContainerState();
}

class _MyAnimatedContainerState extends State<MyAnimatedContainer> {
  bool _isExpanded = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('AnimatedContainer Demo'),
      ),
      body: Center(
        child: GestureDetector(
          onTap: () {
            setState(() {
              _isExpanded = !_isExpanded;
            });
          },
          child: AnimatedContainer(
            duration: Duration(seconds: 1),
            curve: Curves.easeInOut,
            color: Colors.blue,
            width: _isExpanded ? MediaQuery.of(context).size.width : 0,
            height: _isExpanded ? MediaQuery.of(context).size.height : 0,
          ),
        ),
      ),
    );
  }
}

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyAnimatedContainer(),
    );
  }
}