Flutter 无法在主屏幕视图中设置当前日期容器'

所以，在这段代码中，我希望看到当前日期容器主屏幕(主屏幕)，然后该容器的左侧最后10天容器和该容器的右侧即将到来的10天容器将出现，我可以滚动查看.我怎么能做到呢？在这个代码中，最左边的容器是出现的.下面是代码:

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Date Scrolling',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: DateScrollingScreen(),
    );
  }
}

class DateScrollingScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Date Scrolling'),
      ),
      body: Center(
        child: Container(
          height: 300,
          child: ListView.builder(
            scrollDirection: Axis.horizontal,
            itemCount: 21, // 10 past days, current day, and 10 upcoming days
            itemBuilder: (BuildContext context, int index) {
              DateTime currentDate = DateTime.now();
              DateTime date = currentDate.add(Duration(days: index - 10));
              bool isCurrentDate = index == 10;

              return Container(
                width: 150, // Width of each date container
                margin: EdgeInsets.symmetric(horizontal: 5),
                decoration: BoxDecoration(
                  border: Border.all(
                    color: isCurrentDate ? Colors.blue : Colors.grey,
                    width: 2,
                  ),
                  borderRadius: BorderRadius.circular(10),
                ),
                alignment: Alignment.center,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Text(
                      '${date.day}/${date.month}',
                      style: TextStyle(
                        fontSize: 20,
                        fontWeight: FontWeight.bold,
                        color: isCurrentDate ? Colors.blue : Colors.black,
                      ),
                    ),
                    SizedBox(height: 5),
                    Text(
                      isCurrentDate ? 'Today' : '',
                      style: TextStyle(
                        fontSize: 16,
                        fontWeight: FontWeight.bold,
                        color: isCurrentDate ? Colors.blue : Colors.black,
                      ),
                    ),
                  ],
                ),
              );
            },
          ),
        ),
      ),
    );
  }
}

我试着在主屏幕居中，但我不能解决它.