Bottom Navigation Bar

A BottomNavigationBar widget can be displayed at the bottom of the app to select among the small number of views.

A bottom navigation bar which is basically used in the Scaffold Widget, that’s why it is provided as the Scaffold.bottom navigation bar argument.

import 'package:flutter/material.dart';  
  
void main() => runApp(MyApp());  
  
/// This Widget is the main application widget.  
class MyApp extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return MaterialApp(  
      home: MyNavigationBar (),  
    );  
  }  
}  
  
class MyNavigationBar extends StatefulWidget {  
  MyNavigationBar ({Key key}) : super(key: key);  
  
  @override  
  _MyNavigationBarState createState() => _MyNavigationBarState();  
}  
  
class _MyNavigationBarState extends State {  
  int _selectedIndex = 0;  
  static const List _widgetOptions = [  
    Text('Home Page', style: TextStyle(fontSize: 35, fontWeight: FontWeight.bold)),  
    Text('Search Page', style: TextStyle(fontSize: 35, fontWeight: FontWeight.bold)),  
    Text('Profile Page', style: TextStyle(fontSize: 35, fontWeight: FontWeight.bold)),  
  ];  
  
  void _onItemTapped(int index) {  
    setState(() {  
      _selectedIndex = index;  
    });  
  }  
  
  @override  
  Widget build(BuildContext context) {  
    return Scaffold(  
      appBar: AppBar(  
        title: const Text('Flutter BottomNavigationBar Example'),  
          backgroundColor: Colors.green  
      ),  
      body: Center(  
        child: _widgetOptions.elementAt(_selectedIndex),  
      ),  
      bottomNavigationBar: BottomNavigationBar(  
        items: const [  
          BottomNavigationBarItem(  
            icon: Icon(Icons.home),  
            title: Text('Home'),  
            backgroundColor: Colors.green  
          ),  
          BottomNavigationBarItem(  
            icon: Icon(Icons.search),  
            title: Text('Search'),  
            backgroundColor: Colors.yellow  
          ),  
          BottomNavigationBarItem(  
            icon: Icon(Icons.person),  
            title: Text('Profile'),  
            backgroundColor: Colors.blue,  
          ),  
        ],  
        type: BottomNavigationBarType.shifting,  
        currentIndex: _selectedIndex,  
        selectedItemColor: Colors.black,  
        iconSize: 40,  
        onTap: _onItemTapped,  
        elevation: 5  
      ),  
    );  
  }  
}  
Example
flutter-bottom-navigation-bar-example-1
flutter-bottom-navigation-bar-example-2
Subscribe Now