flutter_overlapped_list_header

main.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      child: Container(
        color: Colors.white,
        child: Stack(
          children: [
            Column(
              children: <Widget>[
                new Container(
                  height: 200,
                  color: Colors.teal,
                  child: Center(child: Text("Header")),
                ),
              ],
            ),
            Container(
              width: double.infinity,
              padding: EdgeInsets.only(top: 170),
              child: Column(
                children: [
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                  cell(),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget cell() {
    return Container(
      padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
      child: Container(
        padding: EdgeInsets.all(8),
        color: Colors.grey[100],
        child: Row(
          children: [
            Container(
              color: Colors.red,
              width: 100,
              height: 100,
            ),
            SizedBox(
              width: 16,
            ),
            Text(
              'Hello, World!',
              style: TextStyle(color: Colors.black, fontSize: 20),
            ),
          ],
        ),
      ),
    );
  }
}