rowWidgetAdded

main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            SizedBox(height: 50),
            Padding(
              padding: EdgeInsets.symmetric(horizontal: 10),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: <Widget>[
                  Text(
                    'To-Do List',
                    style: TextStyle(
                        color: Colors.black,
                        fontSize: 32,
                        fontWeight: FontWeight.bold),
                  ),
                  Switch(
                    value: true,
                    onChanged: (switchTheme) {
                      
                    },
                  ),
                ],
              ),
            ),
            )
          ],
        ),
      ),
    );
  }
}