如何在flutter中创建时间线？

import 'package:flutter/material.dart';

class Timeline extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: 5, // 时间线的总数
      itemBuilder: (context, index) {
        return TimelineItem(
          index: index, // 当前时间线的索引
          title: '事件 $index', // 时间线的标题
          description: '这是事件 $index 的描述', // 时间线的描述
        );
      },
    );
  }
}

class TimelineItem extends StatelessWidget {
  final int index;
  final String title;
  final String description;

  const TimelineItem({
    Key key,
    this.index,
    this.title,
    this.description,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 16.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Text(
            title,
            style: TextStyle(
              fontSize: 18,
              fontWeight: FontWeight.bold,
            ),
          ),
          SizedBox(height: 8),
          Text(
            description,
            style: TextStyle(fontSize: 14),
          ),
          SizedBox(height: 16),
          _buildTimelineIndicator(), // 绘制时间线的指示器
        ],
      ),
    );
  }

  Widget _buildTimelineIndicator() {
    return Container(
      width: 20,
      height: 20,
      decoration: BoxDecoration(
        shape: BoxShape.circle,
        color: Colors.blue, // 时间线的颜色
      ),
    );
  }
}