how to hide Bottom Navigation Bar on new screen in flutter? - flutter

Question

Just like here when I click on the timer, the Bottom navigation bar was disappeared. I want to implement the same thing on flutter. Whenever I click on Bottom Navigation Bar Item, for the new screen the Bottom Navigation Bar should not appear.
Here is my code. My Bottom Navigation Bar has four items and I want to hide the bottom navigation bar when I route to a new screen.
class MyFeedScreen extends StatefulWidget {
#override
_MyFeedScreenState createState() => _MyFeedScreenState();
}
class _MyFeedScreenState extends State<MyFeedScreen> {
int _bottomNavIndex = 0;
Widget pageCaller(int index) {
switch (index) {
case 0:
{
return Category();
}
case 1:
{
return Feed();
}
case 3:
{
return Settings();
}
}
}
#override
Widget build(BuildContext context) {
SizeConfig().init(context);
return Scaffold(
body: pageCaller(_bottomNavIndex),
bottomNavigationBar: BottomNavigationBar(
backgroundColor: klogoBlue,
selectedItemColor: Color(0xfff5f5f5),
unselectedItemColor: Color(0xfff5f5f5),
selectedFontSize: 12.0,
type: BottomNavigationBarType.fixed,
currentIndex: _bottomNavIndex,
onTap: (index) {
setState(() {
_bottomNavIndex = index;
});
},
items: [
BottomNavigationBarItem(
icon: Padding(
padding:
EdgeInsets.only(top: SizeConfig.blockSizeVertical * 0.60),
child: Icon(Icons.category),
),
title: Padding(
padding: EdgeInsets.symmetric(
vertical: SizeConfig.blockSizeVertical * 0.60),
child: Text('Category'),
),
),
BottomNavigationBarItem(
icon: Padding(
padding:
EdgeInsets.only(top: SizeConfig.blockSizeVertical * 0.60),
child: Icon(FontAwesomeIcons.newspaper),
),
title: Padding(
padding: EdgeInsets.symmetric(
vertical: SizeConfig.blockSizeVertical * 0.60),
child: Text('My Feed'),
),
),
BottomNavigationBarItem(
icon: Padding(
padding:
EdgeInsets.only(top: SizeConfig.blockSizeVertical * 0.60),
child: Icon(Icons.refresh),
),
title: Padding(
padding: EdgeInsets.symmetric(
vertical: SizeConfig.blockSizeVertical * 0.60),
child: Text('Refresh'),
),
),
BottomNavigationBarItem(
icon: Padding(
padding:
EdgeInsets.only(top: SizeConfig.blockSizeVertical * 0.60),
child: Icon(Icons.settings),
),
title: Padding(
padding: EdgeInsets.symmetric(
vertical: SizeConfig.blockSizeVertical * 0.60),
child: Text('Settings'),
),
),
],
),
);
}
}

Answer 1

You can try this method
Navigator.of(context, rootNavigator: true).push(MaterialPageRoute(
builder: (_) => NewScreen(),
),
);

Answer 2

You can copy paste run full code below
You can check onTap index and do Navigator.push for specific button
code snippet
void _onItemTapped(int index) {
if (index != 2) {
setState(() {
_bottomNavIndex = index;
});
print(_bottomNavIndex);
} else {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => Settings()),
);
}
}
Widget pageCaller(int index) {
switch (index) {
case 0:
{
return Category();
}
case 1:
{
return Feed();
}
}
}
working demo
full code
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
/// This Widget is the main application widget.
class MyApp extends StatelessWidget {
static const String _title = 'Flutter Code Sample';
#override
Widget build(BuildContext context) {
return MaterialApp(
title: _title,
home: MyStatefulWidget(),
);
}
}
class MyStatefulWidget extends StatefulWidget {
MyStatefulWidget({Key key}) : super(key: key);
#override
_MyStatefulWidgetState createState() => _MyStatefulWidgetState();
}
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
int _bottomNavIndex = 0;
void _onItemTapped(int index) {
if (index != 2) {
setState(() {
_bottomNavIndex = index;
});
print(_bottomNavIndex);
} else {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => Settings()),
);
}
}
Widget pageCaller(int index) {
switch (index) {
case 0:
{
return Category();
}
case 1:
{
return Feed();
}
}
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Home'),
),
body: Center(
child: pageCaller(_bottomNavIndex),
),
bottomNavigationBar: BottomNavigationBar(
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home),
title: Text('Category'),
),
BottomNavigationBarItem(
icon: Icon(Icons.business),
title: Text('Feed'),
),
BottomNavigationBarItem(
icon: Icon(Icons.school),
title: Text('Settings'),
),
],
currentIndex: _bottomNavIndex,
selectedItemColor: Colors.amber[800],
onTap: _onItemTapped,
),
);
}
}
class Category extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Text("Category"),
),
);
}
}
class Feed extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Text("Feed"),
),
);
}
}
class Settings extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Settings'),
),
body: Center(
child: Text("Settings"),
),
);
}
}