Diferença entre stateless e stateful widget no Flutter | Alura Cursos Online

Align(
	alignment: Alignment.center,
	child: MeuWidget(
		width: 300,
		height: 455,
		decoration: BoxDecoration(
			color: Colors.white,
			borderRadius: BorderRadius.circular(12)
		),
	),
),

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() {
  runApp(MyApp());
}
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(),
    );
  }
}
    {
  
  Widget (BuildContext context) {
     (
      : (
        : (),
      ),
      : (
        : (
          ,
          : (
            : ,
            : FontWeight.bold,
          ),
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';
class MeuWidget extends StatefulWidget {
  @override
  _MeuWidgetState createState() => _MeuWidgetState();
}
class _MeuWidgetState extends State<MeuWidget> {
  @override
  Widget build(BuildContext context) {
    return Container();
  }
}

import 'package:flutter/material.dart';
void main() {
  runApp(MyApp());
}
class    {
  
  Widget (BuildContext context) {
     (
      : (
        : Colors.blue,
        : VisualDensity.adaptivePlatformDensity,
      ),
      : (: ),
    );
  }
}
    {
  ({ , }) : (: key);
    ;
  @
   () => ();
}
   <> {
    = ;
   () {
    (() {
      ++;
    });
  }
  @
   (BuildContext context) {
     (
      : (
        : (widget.title),
      ),
      : (
        : (
          : MainAxisAlignment.center,
          : <Widget>[
            (
              ,
              : Theme.(context).textTheme.headline4,
            ),
            (: ,),
            (
              : (
                ,
                : (
                  : ,
                  : Colors.white,
                ),
              ),
              : _incrementarContador,
              : Theme.(context).primaryColor,
            ),
            (: ,),
            (
              : (
                ,
                : (
                  : ,
                  : Colors.white,
                ),
              ),
              : () {
                (() {
                  _contador = ;
                });
              },
              : Theme.(context).primaryColor,
            ),
          ],
        ),
      ),
    );
  }
}

Diferença entre stateless e stateful widget no Flutter | Alura Cursos Online