bottom navigation bar with Floating Action Button flutter - flutter

Question

I want to make a bottom navigation bar, with a Floating Action Button, in Flutter
when I click the Floating Action Button, the window will appear on the screen,
the photo in below will help to understand my request:

Answer 1

You can copy paste run full code below
You can use OverlayEntry and set color
entry = OverlayEntry(
builder: (context) {
return Center(
child: Container(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
color: Colors.black.withOpacity(0.5),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
RaisedButton(
onPressed: () {
entry.remove();
},
child: Text("abc"),
working demo
full code
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class BottomAppBarPage extends StatefulWidget {
#override
_BottomAppBarPageState createState() => _BottomAppBarPageState();
}
class _BottomAppBarPageState extends State<BottomAppBarPage> {
OverlayEntry entry;
#override
void initState() {
super.initState();
entry = OverlayEntry(
builder: (context) {
return Center(
child: Container(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
color: Colors.black.withOpacity(0.5),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
RaisedButton(
onPressed: () {
entry.remove();
},
child: Text("abc"),
),
RaisedButton(
onPressed: () {
entry.remove();
},
child: Text("def"),
),
RaisedButton(
onPressed: () {
entry.remove();
},
child: Text("123"),
),
],
),
),
);
},
);
}
#override
void dispose() {
super.dispose();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('Bottom App Bar')),
body: ListView(
padding: const EdgeInsets.all(8),
children: <Widget>[
Container(
height: 50,
color: Colors.amber[600],
child: const Center(child: Text('Entry A')),
),
Container(
height: 50,
color: Colors.amber[500],
child: const Center(child: Text('Entry B')),
),
Container(
height: 50,
color: Colors.amber[100],
child: const Center(child: Text('Entry C')),
),
],
),
floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
floatingActionButton: FloatingActionButton(
child: const Icon(Icons.add),
onPressed: () {
Overlay.of(context).insert(entry);
},
),
bottomNavigationBar: BottomAppBar(
shape: CircularNotchedRectangle(),
notchMargin: 4.0,
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
IconButton(
icon: Icon(Icons.menu),
onPressed: () {},
),
IconButton(
icon: Icon(Icons.search),
onPressed: () {},
)
],
),
),
);
}
}
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: BottomAppBarPage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}