Flutter simple home page with bottom navigation
By Webdevelopmentlogics
// Flutter code sample for BottomNavigationBar
//
// This example shows a [BottomNavigationBar] as it is used within a [Scaffold]
// widget. The [BottomNavigationBar] has four [BottomNavigationBarItem]
// widgets, which means it defaults to [BottomNavigationBarType.shifting], and
// the [currentIndex] is set to index 0. The selected item is amber in color.
// With each [BottomNavigationBarItem] widget, backgroundColor property is
// also defined, which changes the background color of [BottomNavigationBar],
// when that item is selected. The `_onItemTapped` function changes the
// selected item's index and displays a corresponding message in the center of
// the [Scaffold].
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
/// This is the main application widget.
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
static const String _title = 'Flutter Code Sample';
@override
Widget build(BuildContext context) {
return const MaterialApp(
title: _title,
home: MyStatefulWidget(),
);
}
}
/// This is the stateful widget that the main application instantiates.
class MyStatefulWidget extends StatefulWidget {
const MyStatefulWidget({Key? key}) : super(key: key);
@override
State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}
class HomepageWidget extends StatelessWidget {
static String routeName = '/';
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'App title',
home: Container(
child: Text('Hello World'),
),
);
}
}
/// This is the private State class that goes with MyStatefulWidget.
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
int _selectedIndex = 0;
List _screens = [PageOne(), PageTwo()];
static const TextStyle optionStyle =
TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
void _onItemTapped(int index) {
setState(() {
_selectedIndex = index;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('BottomNavigationBar Sample'),
),
body: _screens[_selectedIndex],
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home),
label: 'Home',
backgroundColor: Colors.red,
),
BottomNavigationBarItem(
icon: Icon(Icons.business),
label: 'Business',
backgroundColor: Colors.green,
),
BottomNavigationBarItem(
icon: Icon(Icons.school),
label: 'School',
backgroundColor: Colors.purple,
),
BottomNavigationBarItem(
icon: Icon(Icons.settings),
label: 'Settings',
backgroundColor: Colors.pink,
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.amber[800],
onTap: _onItemTapped,
),
);
}
}
class PageOne extends StatelessWidget {
final SnackBar _snackBar = SnackBar(
content: const Text('Message from page one'),
duration: const Duration(seconds: 5),
);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.teal,
title: Text('Woolha.com - Page one'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
OutlinedButton(
child: Text('Go to page two'),
onPressed: () {
Navigator.pushNamed(context, '/two');
},
),
OutlinedButton(
child: Text('Show message!'),
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(_snackBar);
},
),
],
),
),
);
}
}
class PageTwo extends StatelessWidget {
final SnackBar _snackBar = SnackBar(
content: const Text('Message from page two'),
duration: const Duration(seconds: 5),
);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.teal,
title: Text('Woolha.com - Page Two'),
),
body: Builder(builder: (BuildContext context) {
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
OutlinedButton(
child: Text('Go to page one'),
onPressed: () {
Navigator.pop(context);
},
),
OutlinedButton(
child: Text('Show message!'),
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(_snackBar);
},
),
],
),
);
}),
);
}
}
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