import 'package:flutter/material.dart';

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

class _App extends StatelessWidget {
  const _App({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: ListView(
          children: [
            for (var i = 0; i < 100; i++)
              Padding(
                padding: const EdgeInsets.all(20.0),
                child: Text('abc ' * 20),
              )
          ],
        ),
        bottomNavigationBar: Material(
          child: Transform.translate(
            offset: Offset(0, -20),
            child: Container(
              color: Colors.blue,
              child: SizedBox(
                height: 70,
              ),
            ),
          ),
        ),
      ),
    );
  }
}