POO Act4 App Tab Bar Paginas 1,2,3 tabbarmain.dart

Tabbarmain.dart

import 'package:flutter/material.dart'; 
  
void main() => runApp(KevinApp()); 
  
class KevinApp extends StatelessWidget { 
  @override 
  Widget build(BuildContext context) { 
    return MaterialApp( 
      title: 'Flutter jorge luis', 
      debugShowCheckedModeBanner: false, // quitar baner 
      theme: ThemeData( 
        primarySwatch: Colors.purple, 
      ), 
      home: PaginaInicio(title: 'Barra de pestañas Kevin'), 
    ); //fin de material 
  } // fin de Widget 
}// fin de clase JorgeApp herencia StatelessWidget 
  
class PaginaInicio extends StatefulWidget { 
  PaginaInicio({Key key, this.title}) : super(key: key); 
  final String title; 
  @override 
  _PaginaInicio createState() => _PaginaInicio(); 
   
} // fin clase paginaInicio Herencia Statelesswidget 
  
class _PaginaInicio extends State<PaginaInicio> { 
  @override 
  Widget build(BuildContext context) { 
    return MaterialApp( 
      debugShowCheckedModeBanner: false, // quitar baner 
      home: DefaultTabController( 
         length:3, 
         child : Scaffold( 
           appBar : AppBar( 
             bottom: TabBar( 
               tabs: [ 
               Tab(icon: Icon(Icons.account_circle)), 
               Tab(icon: Icon(Icons.accessibility)), 
               Tab(icon: Icon(Icons.exit_to_app)), 
                  
                  
               ]// fin de pestañas 
             ), //fin de TaBar 
             title: Text("Barra de pestañas Kevin") 
           ), // fin de appBar 
           body: TabBarView( 
              children :  [ 
                Icon(Icons.account_circle), 
                Icon(Icons.accessibility), 
                Icon(Icons.exit_to_app), 
              ] // fin de niños 
     
           )// fin de TabbarView 
         )// fin andamio 
      )// fin home 
    ); // fin MaterialApp 
  } // fin Widget 
}// fin clase_PaginaInicioState Herencia State 
  

  

Codigo funcilnando ------> https://dartpad.dev/130be63f858714cfbdd380af123e28fe