ninja9 elevatedButton

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
      home: Home(),
    ));

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          'App bar',
          style: TextStyle(color: Colors.white),
        ),
        centerTitle: true,
        backgroundColor: Colors.red,
      ),
      body: Center(
        child: ElevatedButton(
          onPressed : () {},
          child : Text('Click me'),
          style : ElevatedButton.styleFrom(
            primary : Colors.purple,
            padding: EdgeInsets.symmetric(horizontal: 50, vertical: 20),
            textStyle: TextStyle(
                fontSize: 20,
                fontWeight: FontWeight.bold
            ),
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Text('click me'),
        onPressed: null,
        backgroundColor: Colors.red,
      ),
    );
  }
}