Flutter Bottom Navigation Bar | BottomNavigationBar Example in Flutter

In Flutter, you can use the BottomNavigationBar widget to create a bottom navigation bar that allows users to navigate between different screens or tabs in your app. Here’s an example:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _currentIndex = 0;

  // Define your pages/screens here
  final List<Widget> _pages = [
    FirstScreen(),
    SecondScreen(),
    ThirdScreen(),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Bottom Navigation Bar Example'),
      ),
      body: _pages[_currentIndex],
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: _currentIndex,
        onTap: (index) {
          setState(() {
            _currentIndex = index;
          });
        },
        items: [
          BottomNavigationBarItem(
            icon: Icon(Icons.home),
            label: 'Home',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.favorite),
            label: 'Favorites',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.person),
            label: 'Profile',
          ),
        ],
      ),
    );
  }
}

class FirstScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Text('Home Screen'),
    );
  }
}

class SecondScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Text('Favorites Screen'),
    );
  }
}

class ThirdScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Text('Profile Screen'),
    );
  }
}