BottomAppBar
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
bool _showFab = true;
bool _showNotch = true;
FloatingActionButtonLocation _fabLocation =
FloatingActionButtonLocation.endDocked;
void _onShowNotchChanged(bool value) {
setState(() {
_showNotch = value;
});
}
void _onShowFabChanged(bool value) {
setState(() {
_showFab = value;
});
}
void _onFabLocationChanged(FloatingActionButtonLocation? value) {
setState(() {
_fabLocation = value ?? FloatingActionButtonLocation.endDocked;
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
automaticallyImplyLeading: false,
title: const Text('Bottom App Bar Demo'),
),
body: ListView(
padding: const EdgeInsets.only(bottom: 88),
children: <Widget>[
SwitchListTile(
title: const Text(
'Floating Action Button',
),
value: _showFab,
onChanged: _onShowFabChanged,
),
SwitchListTile(
title: const Text('Notch'),
value: _showNotch,
onChanged: _onShowNotchChanged,
),
const Padding(
padding: EdgeInsets.all(16),
child: Text('Floating action button position'),
),
RadioListTile<FloatingActionButtonLocation>(
title: const Text('Docked - End'),
value: FloatingActionButtonLocation.endDocked,
groupValue: _fabLocation,
onChanged: _onFabLocationChanged,
),
RadioListTile<FloatingActionButtonLocation>(
title: const Text('Docked - Center'),
value: FloatingActionButtonLocation.centerDocked,
groupValue: _fabLocation,
onChanged: _onFabLocationChanged,
),
RadioListTile<FloatingActionButtonLocation>(
title: const Text('Floating - End'),
value: FloatingActionButtonLocation.endFloat,
groupValue: _fabLocation,
onChanged: _onFabLocationChanged,
),
RadioListTile<FloatingActionButtonLocation>(
title: const Text('Floating - Center'),
value: FloatingActionButtonLocation.centerFloat,
groupValue: _fabLocation,
onChanged: _onFabLocationChanged,
),
],
),
floatingActionButton: _showFab
? FloatingActionButton(
onPressed: () {},
tooltip: 'Create',
child: const Icon(Icons.add),
)
: null,
floatingActionButtonLocation: _fabLocation,
bottomNavigationBar: _DemoBottomAppBar(
fabLocation: _fabLocation,
shape: _showNotch ? const CircularNotchedRectangle() : null,
),
),
);
}
}
class _DemoBottomAppBar extends StatelessWidget {
const _DemoBottomAppBar({
this.fabLocation = FloatingActionButtonLocation.endDocked,
this.shape = const CircularNotchedRectangle(),
});
final FloatingActionButtonLocation fabLocation;
final NotchedShape? shape;
static final List<FloatingActionButtonLocation> centerLocations =
<FloatingActionButtonLocation>[
FloatingActionButtonLocation.centerDocked,
FloatingActionButtonLocation.centerFloat,
];
@override
Widget build(BuildContext context) {
return BottomAppBar(
shape: shape,
color: Colors.blue,
child: IconTheme(
data: IconThemeData(color: Theme.of(context).colorScheme.onPrimary),
child: Row(
children: <Widget>[
IconButton(
tooltip: 'Open navigation menu',
icon: const Icon(Icons.menu),
onPressed: () {},
),
if (centerLocations.contains(fabLocation)) const Spacer(),
IconButton(
tooltip: 'Search',
icon: const Icon(Icons.search),
onPressed: () {},
),
IconButton(
tooltip: 'Favorite',
icon: const Icon(Icons.favorite),
onPressed: () {},
),
],
),
),
);
}
}