flutter bottom navigation bar
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Title of Application',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
@override
State<StatefulWidget> createState() {
return MyHomePageState();
}
}
class MyHomePageState extends State<MyHomePage> {
int selectedIndex = 0;
Widget _myContacts = MyContacts();
Widget _myEmails = MyEmails();
Widget _myProfile = MyProfile();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("BottomNavigationBar Example"),
),
body: this.getBody(),
bottomNavigationBar: BottomNavigationBar(
type: BottomNavigationBarType.fixed,
currentIndex: this.selectedIndex,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.contacts),
title: Text("Contacts"),
),
BottomNavigationBarItem(
icon: Icon(Icons.mail),
title: Text("Emails"),
),
BottomNavigationBarItem(
icon: Icon(Icons.person),
title: Text("Profile"),
)
],
onTap: (int index) {
this.onTapHandler(index);
},
),
);
}
Widget getBody( ) {
if(this.selectedIndex == 0) {
return this._myContacts;
} else if(this.selectedIndex==1) {
return this._myEmails;
} else {
return this._myProfile;
}
}
void onTapHandler(int index) {
this.setState(() {
this.selectedIndex = index;
});
}
}
class MyContacts extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Center(child: Text("Contacts"));
}
}
class MyEmails extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Center(child: Text("Emails"));
}
}
class MyProfile extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Center(child: Text("Profile"));
}
}
