How to make BottonNavigationBar route to different body Containers in Flutter - flutter

Question

I'm creating a simple app consisting of three pages, the only thing to be changed when using the navigation bar is the body. I need every body to be in it's own dart file. whenever I try achieving this and replace the text with another widget, I break the app.
Here's my code so far:
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
static const String _title = 'Sample App';
#override
Widget build(BuildContext context) {
return const MaterialApp(
title: _title,
home: MyStatefulWidget(),
);
}
}
class MyStatefulWidget extends StatefulWidget {
const MyStatefulWidget({Key? key}) : super(key: key);
#override
State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
int _selectedIndex = 0;
static const TextStyle optionStyle =
TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
static const List<Widget> _widgetOptions = <Widget>[
Text(
'Index 2: Account',
style: optionStyle,
),
Text(
'Index 1: Locate a Store',
style: optionStyle,
),
Text(
'Index 0: Home',
style: optionStyle,
),
];
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: _widgetOptions.elementAt(_selectedIndex),
),
backgroundColor: Colors.amber[400],
bottomNavigationBar: BottomNavigationBar(
showSelectedLabels: false, // <-- HERE
showUnselectedLabels: false, // <-- AND HERE
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.manage_accounts),
label: 'Account',
),
BottomNavigationBarItem(
icon: Icon(Icons.search),
label: 'Store Locator',
),
BottomNavigationBarItem(
icon: Icon(Icons.home),
label: 'Home Page',
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.amberAccent[400],
onTap: _onItemTapped,
iconSize: 35,
),
);
}
}
To sum it up, The Text widget need to be replaced with new body/container that's saved in its own dart file, and work with the navigation bar.