Bottomnav

import 'package:flutter/material.dart';


void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return MyAppState();
  }
}

class MyAppState extends State<MyApp> {
  int _selectedPage = 2;

  final _pageOptions = [
   Container(),
    Container(),
    Container(),
    Container(),
     Container(),
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Sync Shop',
      theme: ThemeData(
        primarySwatch: Colors.red,
      ),
      home: Scaffold(
        body: _pageOptions[_selectedPage],
        bottomNavigationBar: BottomNavigationBar(
          type: BottomNavigationBarType.fixed,
          currentIndex: _selectedPage,
          onTap: (int index) {
            setState(() {
              _selectedPage = index;
            });
          },
          items: [

            BottomNavigationBarItem(
              icon: Icon(Icons.note),
              label: "Notification",
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.work),
              label: "Appointment",
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.waterfall_chart),
              label: "Request",
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.account_circle),
              label: "Profile",
            ),
          ],
        ),
      ),
    );
  }
}