flutter_notch.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  List<Color> _purples = [
    Color(0xFF4A235A),
    Color(0xFF5B2C6F),
    Color(0xFF6C3483),
    Color(0xFF7D3C98),
    Color(0xFF8E44AD),
    Color(0xFFA569BD),
    Color(0xFFBB8FCE),
    Color(0xFFD2B4DE),
    Color(0xFFE8DAEF),
    Color(0xFFF4ECF7),
  ];
  List<Color> _yellows = [
    Color(0xFF7D6608),
    Color(0xFF9A7D0A),
    Color(0xFFB7950B),
    Color(0xFFD4AC0D),
    Color(0xFFF1C40F),
    Color(0xFFF4D03F),
    Color(0xFFF7DC6F),
    Color(0xFFF9E79F),
    Color(0xFFFCF3CF),
    Color(0xFFFEF9E7),
  ];

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {

    MediaQueryData mediaQueryData = MediaQuery.of(context);
    debugPrint('MyApp : build'
        ' : padding=${mediaQueryData.padding}'
        ' : viewInsets=${mediaQueryData.viewInsets}');

    return SafeArea(
      child: Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          // We also apply a custom font, ProductSans.
          title: Text(
            widget.title,
            style: TextStyle(
              fontFamily: 'ProductSans',
            ),
          ),
        ),
        body: ListView(
          scrollDirection: Axis.vertical,
          children: <Widget>[
            Container(
              padding: const EdgeInsets.symmetric(
                vertical: 20.0,
              ),
              height: 120.0,
              child: ListView(
                scrollDirection: Axis.horizontal,
                children: _purples.map((Color color) {
                  return Container(
                    color: color,
                    height: 80.0,
                    width: 80.0,
                  );
                }).toList(),
              ),
            ),
            Container(
              padding: const EdgeInsets.symmetric(
                vertical: 20.0,
              ),
              height: 120.0,
              child: ListView(
                scrollDirection: Axis.horizontal,
                children: _yellows.map((Color color) {
                  return Container(
                    color: color,
                    height: 80.0,
                    width: 120.0,
                  );
                }).toList(),
              ),
            ),
            Container(
              alignment: Alignment.center,
              child: Text(
                'Button tapped $_counter time${_counter == 1 ? '' : 's'}.',
                // This optional key is used to uniquely identify this widget in
                // the integration test at: test_driver/tap_test.dart.
                key: Key('CountText'),
              ),
            ),
          ],
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: _incrementCounter,
          tooltip: 'Increment',
          child: Icon(Icons.add),
        ), // This trailing comma makes auto-formatting nicer for build methods.
      ),
    );
  }
}