Nilen Patel Inc.

Tutorial and code of Gradient Bottom NavigationBar in Flutter. Copy and paste the below code as per your requirements.

gradient_bottom_navigation_bar: ^1.0.0+4

import 'package:flutter/material.dart';
import 'package:gradient_bottom_navigation_bar/gradient_bottom_navigation_bar.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primaryColor: Colors.white,
      ),
      title: 'Gradient Bottom NavigationBar',
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);

  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  int _selectedIndex = 1;

  final _widgetOptions = [
    const Text('Index 0: Home'),
    const Text('Index 1: Business'),
    const Text('Index 2: School'),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Center(child: Text('Gradient Bottom NavigationBar'),),
      ),
      body: Center(
        child: _widgetOptions.elementAt(_selectedIndex),
      ),
      bottomNavigationBar: GradientBottomNavigationBar(
        backgroundColorStart: Colors.purple,
        backgroundColorEnd: Colors.deepOrange,
        items: const <BottomNavigationBarItem>[
           BottomNavigationBarItem(icon:  Icon(Icons.home), title:  Text('Home')),
           BottomNavigationBarItem(icon:  Icon(Icons.business), title: Text('Business')),
           BottomNavigationBarItem(icon:  Icon(Icons.school), title:  Text('School')),
        ],
        currentIndex: _selectedIndex,
        onTap: _onItemTapped,
      ),
    );
  }

  void _onItemTapped(int index) {
    setState(() {
      _selectedIndex = index;
    });
  }
}