Convex Bottom Bar

Convex Bottom Bar Flutter: A Comprehensive Guide

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Navigation is a core aspect of any mobile app’s user experience, and Flutter’s flexibility has led to the creation of several navigation bar packages. Among these, the Convex Bottom Bar has gained popularity for its unique convex design, rich customization options, and easy integration. This article explores everything developers need to know about the convex bottom bar in Flutter—why it matters, how to implement it and key features.And how the package can help you providing a seemless bottom nav bar experience for your flutter project.

What is Convex Bottom Bar in Flutter?

The convex bottom bar is a type of bottom navigation bar that features a convex, upward-bulging shape at its center, making the central action stand out visually. Unlike the standard BottomNavigationBar, the convex design provides a more stylish, attractive, and customizable navigation bar that enhances user engagement

Key Features

  • Unique convex design that draws user attention
  • Supports multiple tab styles and icons, including custom images
  • Themable: Easily adjust colors, height, and active/inactive states
  • Simple integration with existing Scaffold structures

Convex Bottom Bar Flutter Example

Below is a basic example of integrating the convex bottom bar using the convex_bottom_bar package in Flutter:

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

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

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

class HomeScreen extends StatefulWidget {
  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  int _selectedIndex = 0;

  final List<Widget> _pages = [
    Center(child: Text('Home')),
    Center(child: Text('Favorites')),
    Center(child: Text('Profile')),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: _pages[_selectedIndex],
      bottomNavigationBar: ConvexAppBar(
        style: TabStyle.react,
        items: [
          TabItem(icon: Icons.home, title: 'Home'),
          TabItem(icon: Icons.favorite, title: 'Favorites'),
          TabItem(icon: Icons.person, title: 'Profile'),
        ],
        initialActiveIndex: _selectedIndex,
        onTap: (int index) {
          setState(() {
            _selectedIndex = index;
          });
        },
        backgroundColor: Colors.blue,
        activeColor: Colors.white,
        color: Colors.white60,
      ),
    );
  }
}

This code demonstrates the use of the package in a simple app with three navigation items and a convex effect.

How to Add Convex Bottom Bar to Your Project

To get started, follow these steps:

1. Add the dependency:

convex_bottom_bar: ^latest_version

Run flutter pub get to fetch the package.

2. Import the package:

import 'package:convex_bottom_bar/convex_bottom_bar.dart';

3. Use in Scaffold:

  • Place ConvexAppBar in the bottomNavigationBar property of your Scaffold.
  • Customize tabs using TabItems and styles as shown above.

Convex Bottom Bar Flutter Tutorial and Customization

The package supports a variety of styles, tab counts (odd numbers work best), and customization features such as:

  • Custom icons or images
  • Multiple predefined styles: react, fixed, flip, textIn, titled, and more
  • Theming (colors, active/inactive states, backgrounds)
  • Responsive tap events and programmatic tab selection

Convex Bottom Bar Flutter GitHub

The official Convex Bottom Bar Flutter GitHub repository is located at:

This repo contains:

  • Live examples
  • The full API documentation
  • Known issues and updates on Flutter version compatibility

Why Choose Convex Bottom Bar Flutter Navbar?

  • Aesthetic improvement: Upgrades the standard navigation bar into a modern, visually compelling component.
  • Easy to use: Simple API for quick scaffolding and rapid prototyping.
  • Customizable: Fits a variety of app styles and requirements.

Conclusion

The Convex Bottom Bar Flutter package is an essential tool for developers who want to level up their app’s navigation interface. With easy installation, flexible customization, and a broad base of available tutorials and open-source examples, building a distinctive and interactive navigation bar has never been easier. Explore the official convex_bottom_bar Flutter example, join the community on GitHub, and use this guide as your starting point for crafting visually engaging, intuitive Flutter navigation bars in your next project.

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