Please refer below code:
```
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final GlobalKey<NavigatorState> _navigatorKey = GlobalKey<NavigatorState>();
int _currentTabIndex = 0;
ValueNotifier<bool> refreshPage = ValueNotifier(false);
@override
Widget build(BuildContext context) {
return ValueListenableBuilder<bool>(
valueListenable: refreshPage,
builder: (context, value, child) {
return WillPopScope(
onWillPop: () {
Navigator.of(context).pop();
},
child: Scaffold(
backgroundColor: _currentTabIndex == 0
? Colors.white
: _currentTabIndex == 1
? Colors.green
: Colors.green,
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text(
"Bottom Navigation Bar",
style: TextStyle(
color: Colors.black,
fontSize: 14,
fontWeight: FontWeight.w600),
),
leading: IconButton(
icon: Icon(
Icons.arrow_back_ios,
size: 18.0,
color: Colors.black,
),
onPressed: () {
Navigator.of(context).pop();
},
),
centerTitle: true,
),
body: SingleChildScrollView(
child: _currentTabIndex == 0
? Column(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 80.0, right: 250),
child: Center(
child: Container(
width: 200.0,
height: 20.0,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15.0)),
child: (const Text(
'Hello',
textAlign: TextAlign.center,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.black),
)),
),
),
),
Padding(
padding: EdgeInsets.only(left: 300.0, top: 1.0),
child: IconButton(
icon: new Icon(Icons.account_circle, size: 30.0),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Notifications(),
),
);
},
),
),
Padding(
padding: EdgeInsets.only(left: 300.0, top: 5.0),
child: IconButton(
icon: const Icon(
Icons.notifications,
size: 25.0,
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Notifications(),
),
);
},
),
),
Padding(
padding: const EdgeInsets.only(top: 0.0),
child: Center(
child: Container(
width: 390,
height: 450,
decoration: BoxDecoration(
color: Colors.green.shade100,
borderRadius: BorderRadius.circular(10.0)),
),
),
),
],
)
: _currentTabIndex == 1
? Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
color: Colors.green,
child: Center(child: Text("Page 2"))),
],
)
: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
color: Colors.green,
child: Center(child: Text("Profile"))),
],
),
),
bottomNavigationBar: _bottomNavigationBar(),
),
);
},
);
}
Widget _bottomNavigationBar() {
return BottomNavigationBar(
type: BottomNavigationBarType.fixed,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.book_online),
label: 'Page 1',
),
BottomNavigationBarItem(
icon: Icon(Icons.read_more),
label: 'Page 2',
),
BottomNavigationBarItem(
icon: Icon(Icons.account_circle),
label: 'Profile',
)
],
onTap: _onTap,
currentIndex: _currentTabIndex,
);
}
_onTap(int tabIndex) {
switch (tabIndex) {
case 0:
Notifications();
// _navigatorKey.currentState.pushReplacementNamed("Page 1");
break;
case 1:
Notifications();
// _navigatorKey.currentState.pushReplacementNamed("Page 2");
break;
case 2:
Notifications();
// _navigatorKey.currentState.pushReplacementNamed("Profile");
break;
}
_currentTabIndex = tabIndex;
refreshPage.value = !refreshPage.value;
}
Route<dynamic> generateRoute(RouteSettings settings) {
switch (settings.name) {
case "Page 1":
return MaterialPageRoute(builder: (context) => Notifications()
// Container(
// color: Colors.green, child: Center(child: Text("Page 1")))
);
case "Page 2":
return MaterialPageRoute(builder: (context) => Notifications()
// Container(
// color: Colors.green, child: Center(child: Text("Page 2")))
);
default:
return MaterialPageRoute(builder: (context) => Notifications()
// Container(
// color: Colors.green, child: Center(child: Text("Profile")))
);
}
}
}
class Notifications extends StatefulWidget {
Notifications({Key key, this.title}) : super(key: key);
final String title;
@override
_NavitionState createState() => _NavitionState();
}
class _NavitionState extends State<Notifications> {
@override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () {
Navigator.of(context).pop();
},
child: Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text(
"Notification",
style: TextStyle(
color: Colors.black, fontSize: 14, fontWeight: FontWeight.w600),
),
leading: IconButton(
icon: Icon(
Icons.arrow_back_ios,
size: 18.0,
color: Colors.black,
),
onPressed: () {
Navigator.of(context).pop();
},
),
centerTitle: true,
),
body: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Center(
child: Container(
child: Text("Notification Body"),
),
)
],
),
),
);
}
}
```
Please refer to below code
```
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final GlobalKey<NavigatorState> _navigatorKey = GlobalKey<NavigatorState>();
int _currentTabIndex = 0;
ValueNotifier<bool> refreshPage = ValueNotifier(false);
@override
Widget build(BuildContext context) {
return ValueListenableBuilder<bool>(
valueListenable: refreshPage,
builder: (context, value, child) {
return WillPopScope(
onWillPop: () {
Navigator.of(context).pop();
},
child: Scaffold(
backgroundColor: _currentTabIndex == 0
? Colors.white
: _currentTabIndex == 1
? Colors.green
: Colors.green,
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text(
"Bottom Navigation Bar",
style: TextStyle(
color: Colors.black,
fontSize: 14,
fontWeight: FontWeight.w600),
),
leading: IconButton(
icon: Icon(
Icons.arrow_back_ios,
size: 18.0,
color: Colors.black,
),
onPressed: () {
Navigator.of(context).pop();
},
),
centerTitle: true,
),
body: SingleChildScrollView(
child: _currentTabIndex == 0
? Column(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 80.0, right: 250),
child: Center(
child: Container(
width: 200.0,
height: 20.0,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(15.0)),
child: (const Text(
'Hello',
textAlign: TextAlign.center,
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.black),
)),
),
),
),
Padding(
padding: EdgeInsets.only(left: 300.0, top: 1.0),
child: IconButton(
icon: new Icon(Icons.account_circle, size: 30.0),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Notifications(),
),
);
},
),
),
Padding(
padding: EdgeInsets.only(left: 300.0, top: 5.0),
child: IconButton(
icon: const Icon(
Icons.notifications,
size: 25.0,
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Notifications(),
),
);
},
),
),
Padding(
padding: const EdgeInsets.only(top: 0.0),
child: Center(
child: Container(
width: 390,
height: 450,
decoration: BoxDecoration(
color: Colors.green.shade100,
borderRadius: BorderRadius.circular(10.0)),
),
),
),
],
)
: _currentTabIndex == 1
? Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
color: Colors.green,
child: Center(child: Text("Page 2"))),
],
)
: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
color: Colors.green,
child: Center(child: Text("Profile"))),
],
),
),
bottomNavigationBar: _bottomNavigationBar(),
),
);
},
);
}
Widget _bottomNavigationBar() {
return BottomNavigationBar(
type: BottomNavigationBarType.fixed,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.book_online),
label: 'Page 1',
),
BottomNavigationBarItem(
icon: Icon(Icons.read_more),
label: 'Page 2',
),
BottomNavigationBarItem(
icon: Icon(Icons.account_circle),
label: 'Profile',
)
],
onTap: _onTap,
currentIndex: _currentTabIndex,
);
}
_onTap(int tabIndex) {
switch (tabIndex) {
case 0:
Notifications();
// _navigatorKey.currentState.pushReplacementNamed("Page 1");
break;
case 1:
Notifications();
// _navigatorKey.currentState.pushReplacementNamed("Page 2");
break;
case 2:
Notifications();
// _navigatorKey.currentState.pushReplacementNamed("Profile");
break;
}
_currentTabIndex = tabIndex;
refreshPage.value = !refreshPage.value;
}
Route<dynamic> generateRoute(RouteSettings settings) {
switch (settings.name) {
case "Page 1":
return MaterialPageRoute(builder: (context) => Notifications()
// Container(
// color: Colors.green, child: Center(child: Text("Page 1")))
);
case "Page 2":
return MaterialPageRoute(builder: (context) => Notifications()
// Container(
// color: Colors.green, child: Center(child: Text("Page 2")))
);
default:
return MaterialPageRoute(builder: (context) => Notifications()
// Container(
// color: Colors.green, child: Center(child: Text("Profile")))
);
}
}
}
class Notifications extends StatefulWidget {
Notifications({Key key, this.title}) : super(key: key);
final String title;
@override
_NavitionState createState() => _NavitionState();
}
class _NavitionState extends State<Notifications> {
@override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () {
Navigator.of(context).pop();
},
child: Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text(
"Notification",
style: TextStyle(
color: Colors.black, fontSize: 14, fontWeight: FontWeight.w600),
),
leading: IconButton(
icon: Icon(
Icons.arrow_back_ios,
size: 18.0,
color: Colors.black,
),
onPressed: () {
Navigator.of(context).pop();
},
),
centerTitle: true,
),
body: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Center(
child: Container(
child: Text("Notification Body"),
),
)
],
),
),
);
}
}
```
