content: import 'package:flutter/material.dart';
  import 'package:flutter/services.dart';
  
  void main() {
    runApp(MaterialApp(
      title: 'Button Widget Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(title: Text('Button Widget Example'),),
        backgroundColor: Colors.grey[300],
        body: MyApp(),
      ),
    ));
  }
  
  class MyApp extends StatefulWidget {
    // This widget is the root of your application.
    @override
    _MyAppState createState() => _MyAppState();
  }
  
  class _MyAppState extends State<MyApp> {
  
    @override
    void initState() {
      super.initState();
    }
    @override
    Widget build(BuildContext context) {
      return SingleChildScrollView(
        child: Container(
          padding: EdgeInsets.all(16),
          child: Column(
            children: [
  
              RaisedButton(
                onPressed: (){print("onPressed");},
                child: Text('Click me'),
                color: Colors.blue,
              ),
              ElevatedButton(
                  onPressed: (){print("onPressed");},
                  child: Text('Click me')
              ),
              FlatButton(
                onPressed: (){print("onPressed");},
                child: Text('click me'),
              ),
              TextButton(
                onPressed: (){print("onPressed");},
                child: Text('Click me '),
              ),
              ElevatedButton.icon(
                icon: Icon(Icons.account_circle),
                onPressed: (){print("onPressed");},
                label: Text('Click me'),
              ),
              IconButton(
                icon: Icon(Icons.security),
                onPressed: (){print("onPressed");},
              ),
  
              FloatingActionButton(
                  onPressed: (){print("onPressed");},
                  child: Text('Click'),
              )
            ]
          ),
        ),
      );
    }
  }
  