better_animated_bottom_bar 1.0.1

This package helps you to achieve animated notch bottom navigation bar with any widget as children.

example/lib/main.dart

import 'dart:developer';

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

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Animated Notch Bottom Bar',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

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

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  /// Controller to handle PageView and also handles initial page
  final _pageController = PageController(initialPage: 0);

  /// Controller to handle bottom nav bar and also handles initial page
  final NotchBottomBarController _controller = NotchBottomBarController(index: 0);

  int maxCount = 5;

  @override
  void dispose() {
    _pageController.dispose();

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    /// widget list
    final List<Widget> bottomBarPages = [
      Page1(
        controller: (_controller),
      ),
      const Page2(),
      const Page3(),
      const Page4(),
      const Page5(),
    ];
    return Scaffold(
      body: PageView(
        controller: _pageController,
        physics: const NeverScrollableScrollPhysics(),
        children: List.generate(bottomBarPages.length, (index) => bottomBarPages[index]),
      ),
      extendBody: true,
      bottomNavigationBar: (bottomBarPages.length <= maxCount)
          ? AnimatedNotchBottomBar(
              /// Provide NotchBottomBarController
              notchBottomBarController: _controller,
              color: Colors.white,
              showLabel: true,
              textOverflow: TextOverflow.visible,
              maxLine: 1,
              shadowElevation: 3,
              kBottomRadius: 0.0,
              shadowColor: Colors.red,

              // notchShader: const SweepGradient(
              //   startAngle: 0,
              //   endAngle: pi / 2,
              //   colors: [Colors.red, Colors.green, Colors.orange],
              //   tileMode: TileMode.mirror,
              // ).createShader(Rect.fromCircle(center: Offset.zero, radius: 8.0)),
              notchColor: Colors.red,

              /// restart app if you change removeMargins
              removeMargins: true,
              bottomBarWidth: 500,
              showShadow: true,
              durationInMilliSeconds: 300,
              showTopRadius: true,
              itemLabelStyle: const TextStyle(fontSize: 10),
              activeLabelStyle: const TextStyle(color: Colors.red),
              bottomBarHeight: 70,
              elevation: 1,
              bottomBarItems: const [
                BottomBarItem(
                  inActiveItem: Icon(
                    Icons.home_filled,
                    color: Colors.blueGrey,
                  ),
                  activeItem: Icon(
                    Icons.home_filled,
                    color: Colors.white,
                  ),
                  itemLabel: 'Inicio',
                ),
                BottomBarItem(
                  inActiveItem: Icon(Icons.star, color: Colors.blueGrey),
                  activeItem: Icon(
                    Icons.star,
                    color: Colors.blueAccent,
                  ),
                  itemLabel: 'Transferir',
                ),
                BottomBarItem(
                  inActiveItem: Icon(
                    Icons.settings,
                    color: Colors.blueGrey,
                  ),
                  activeItem: Icon(
                    Icons.settings,
                    color: Colors.pink,
                  ),
                  itemLabel: 'Movimientos',
                ),
                BottomBarItem(
                  inActiveItem: Icon(
                    Icons.person,
                    color: Colors.blueGrey,
                  ),
                  activeItem: Icon(
                    Icons.person,
                    color: Colors.yellow,
                  ),
                  itemLabel: 'Ajustes',
                ),
              ],
              onTap: (index) {
                log('current selected index $index');
                _pageController.jumpToPage(index);
              },
              kIconSize: 24.0,
            )
          : null,
    );
  }
}

/// add controller to check weather index through change or not. in page 1
class Page1 extends StatelessWidget {
  final NotchBottomBarController? controller;

  const Page1({Key? key, this.controller}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.yellow,
      child: Center(
        /// adding GestureDetector
        child: GestureDetector(
          behavior: HitTestBehavior.translucent,
          onTap: () {
            controller?.jumpTo(2);
          },
          child: const Text('Page 1'),
        ),
      ),
    );
  }
}

class Page2 extends StatelessWidget {
  const Page2({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(color: Colors.green, child: const Center(child: Text('Page 2')));
  }
}

class Page3 extends StatelessWidget {
  const Page3({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(color: Colors.white, child: const Center(child: Text('Page 3')));
  }
}

class Page4 extends StatelessWidget {
  const Page4({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(color: Colors.blue, child: const Center(child: Text('Page 4')));
  }
}

class Page5 extends StatelessWidget {
  const Page5({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(color: Colors.lightGreenAccent, child: const Center(child: Text('Page 5')));
  }
}