Bottom Bar

Bottom bar helps create an optimized bottom navigation bar with beautiful animations.

Content

• Installation
• Parameters
• Take Note
• FAQ
• Community Support

Installation

Add bottom_bar to pubspec.yaml

dependencies:
  bottom_bar: ^2.0.3

Breaking Changes

• darkActiveColor is removed to simplify the api. Instead, use PlatformBrightness to check dark mode and adjust the color accordingly

Parameters

BottomBar

Creates a BottomBar that displays a list of BottomBarItem

Required:

• selectedIndex - Index of selected item
• items - List of BottomBarItem to display
• onTap - Fires when a BottomBarItem is tapped

Optional:

• backgroundColor - Background Color of BottomBar
• height - Height of BottomBar
• padding - Padding of BottomBar container
• mainAxisAlignment - Describes how BottomBarItems are horizontally laid out
• curve - Curve of animation
• duration - Duration of animation
• border - Border of BottomBarItem's background color
• itemPadding - Padding of BottomBarItem's background color
• textStyle - TextStyle of title widget
• showActiveBackgroundColor - Shows the background color of a selected BottomBarItem if set to true

BottomBarItem

Contains information about the item that BottomBar has to display

Required:

• icon - Icon of BottomBarItem
• title - Title of BottomBarItem (Typically a Text widget)
• activeColor - Primary color of a selected BottomBarItem

Optional:

• activeIconColor - Icon color of a selected BottomBarItem
• activeTitleColor - Text color of a selected BottomBarItem
• backgroundColorOpacity - Opacity of a selected BottomBarItem background color (Defaults to 15%)
• inactiveIcon- Icon to display when BottomBarItem is not active
• inactiveColor - Primary color of BottomBarItem when it is NOT selected

Usage

Import the Package

import 'package:bottom_bar/bottom_bar.dart';

Example

  int _currentPage = 0;
  final _pageController = PageController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: PageView(
        controller: _pageController,
        children: [
          Container(color: Colors.blue),
          Container(color: Colors.red),
          Container(color: Colors.greenAccent.shade700),
          Container(color: Colors.orange),
        ],
        onPageChanged: (index) {
          // Use a better state management solution
          // setState is used for simplicity
          setState(() => _currentPage = index);
        },
      ),
      bottomNavigationBar: BottomBar(
        selectedIndex: _currentPage,
        onTap: (int index) {
          _pageController.jumpToPage(index);
          setState(() => _currentPage = index);
        },
        items: <BottomBarItem>[
          BottomBarItem(
            icon: Icon(Icons.home),
            title: Text('Home'),
            activeColor: Colors.blue,
          ),
          BottomBarItem(
            icon: Icon(Icons.favorite),
            title: Text('Favorites'),
            activeColor: Colors.red,
          ),
          BottomBarItem(
            icon: Icon(Icons.person),
            title: Text('Account'),
            activeColor: Colors.greenAccent.shade700,
          ),
          BottomBarItem(
            icon: Icon(Icons.settings),
            title: Text('Settings'),
            activeColor: Colors.orange,
          ),
        ],
      ),
    );
  }

FAQ

My phone's notch is overlapping with BottomBar. How do I fix this?

• Simply wrap BottomBar with a SafeArea widget.

How do I change the overall color of BottomBarItem when in dark mode?

• You can use PlatformBrightness to check dark mode and adjust the color accordingly.

  @override
  Widget build(BuildContext context) {
    bool isDarkMode = MediaQuery.of(context).platformBrightness == Brightness.dark;

    BottomBarItem(
      activeColor: isDarkMode ? Colors.orange : Colors.blue, // Is dark mode true? (Yes -> Colors.orange | No -> Colors.blue)
    ),
  }

Community Support

If you have any suggestions or issues, feel free to open an issue

If you would like to contribute, feel free to create a PR

Libraries

bottom_bar