Drawer + PageView

duvida.dart

import 'package:flutter/material.dart';

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Home',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        backgroundColor: Colors.white
      ),
      home: HomePage(),
      debugShowCheckedModeBanner: false,
    );
  }
}

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

class _HomePageState extends State<HomePage> with TickerProviderStateMixin {
  
  PageController controllerMenu;

  @override
  void initState() {
    controllerMenu = new PageController(
      initialPage: 0,
      keepPage: false,
      viewportFraction: 0.5,
    );
    super.initState(); 
  }

  @override
  void dispose() {
    controllerMenu.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        // title: Text("Ola"),
      ),
      body: Container(
        child: Center(
          child: Text(
            "Vista Tecnologia",
            style: TextStyle(
              color: Colors.black,
              fontSize: 50
            ),
          ),
        ),
      ),
      drawer: Drawer(
        elevation: 25,
        child: Column(
          children: <Widget>[
            UserAccountsDrawerHeader(
              accountName: Text("Gladson"),
              accountEmail: Text("[email protected]"),
              currentAccountPicture: CircleAvatar(
                backgroundImage: NetworkImage(
                  "https://avatars0.githubusercontent.com/u/1013698?s=150"
                ),
              ),
            ),
            Expanded(
              child: Container(
                color: Colors.amberAccent,
                child: PageView(
                  controller: controllerMenu,
                  physics: AlwaysScrollableScrollPhysics(),
                  scrollDirection: Axis.horizontal,
                  onPageChanged: (value) {
                    setState(() {
                      menu = value;
                      print(menu);
                    });
                  },
                  children: <Widget>[
                    Scaffold(
                      body: Container(
                        color: Colors.red,
                        child: Center(
                          child: RaisedButton(
                            color: Colors.white,
                            onPressed: () {
                              if (controllerMenu.hasClients) {
                                controllerMenu.animateToPage(
                                  1,
                                  duration: const Duration(milliseconds: 400),
                                  curve: Curves.easeInOut,
                                );
                              }
                            },
                            child: Text('Next'),
                          ),
                        ),
                      ),
                    ),
                    
                    Container(
                      width: 350,
                      color: Colors.blue,
                      child: Center(
                        child: RaisedButton(
                          color: Colors.white,
                          onPressed: () {
                            if (controllerMenu.hasClients) {
                              controllerMenu.animateToPage(
                                0,
                                duration: const Duration(milliseconds: 400),
                                curve: Curves.easeInOut,
                              );
                            }
                          },
                          child: Text('Previous'),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            )
          ],
        ),
      ),
    );
  }
}