Bottom Bar Animation In Flutter

Bottom Bar Animation In Flutter

Screenshot :

Bottom Bar Animation In Flutter

active_tab.dart

import 'package:flutter/material.dart';

class ActiveTab extends AnimatedWidget {
  final IconData iconData;
  final String text;

  ActiveTab({Key key, Animation animation, this.iconData, this.text})
      : super(key: key, listenable: animation);

  @override
  Widget build(BuildContext context) {
    final Animation<double> animation = listenable;

    return Transform(
        transform: Matrix4.diagonal3Values(animation.value, 1, 1),
        child: Container(
            width: 100.0,
            height: 60.0,
            decoration: BoxDecoration(
                color: Colors.orange,
                borderRadius: BorderRadius.only(
                    topLeft: Radius.circular(20.0),
                    bottomLeft: Radius.circular(20.0),
                    bottomRight: Radius.circular(20.0))),
            child: Row(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: <Widget>[
                  Icon(iconData, color: Colors.white, size: 25),
                  Text(text,
                      style: TextStyle(color: Colors.white, fontSize: 14))
                ])));
  }
}

bottom_bar.dart

import 'package:flutter/material.dart';

import 'active_tab.dart';

class BottomBar extends StatefulWidget {
  @override
  BottomBarState createState() => BottomBarState();
}

class BottomBarState extends State<BottomBar>
    with SingleTickerProviderStateMixin {
  Animation animation;
  AnimationController animationController;
  int currentTab = 0;

  @override
  void initState() {
    super.initState();

    animationController =
        AnimationController(vsync: this, duration: Duration(seconds: 1));

    animation = Tween(begin: 0.0, end: 1.0).animate(
        CurvedAnimation(parent: animationController, curve: Curves.elasticOut));

    animationController.forward();
  }

  @override
  Widget build(BuildContext context) {
    return Container(
        height: 60,
        width: MediaQuery.of(context).size.width,
        padding: EdgeInsets.only(right: 16, bottom: 5, top: 10, left: 16),
        child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
              _buildTab("Hotels", Icons.hotel, 0),
              _buildTab("Favorites", Icons.favorite, 1),
              _buildTab("Map", Icons.map, 2)
            ]));
  }

  Widget _buildTab(String text, IconData icon, int index) {
    return currentTab == index
        ? ActiveTab(
            animation: animation, key: Key(text), text: text, iconData: icon)
        : Material(
            child: InkWell(
                onTap: () {
                  setState(() {
                    currentTab = index;
                    animationController.reset();
                    animationController.forward();
                  });
                },
                child: Icon(icon, size: 25)));
  }

  @override
  void dispose() {
    animationController.dispose();
    super.dispose();
  }
}

home_page.dart

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

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(bottomNavigationBar: BottomBar(), body: Container()));
  }
}

main.dart

import 'package:flutter/material.dart';
import 'package:hotelbooking/home_page.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        debugShowCheckedModeBanner: false,
        title: 'Bottom Bar Animation',
        theme: ThemeData(
            primarySwatch: Colors.blue,
            primaryColor: Colors.blueAccent,
            accentColor: Colors.blue,
            fontFamily: 'avenir',
            cardColor: Colors.white),
        home: HomePage());
  }
}

The flutter tutorial is a website that bring you the latest and amazing resources of code. All the languages codes are included in this website. The languages like flutter, android, java,kotlin etc.with the help of this languages any user can develop the beautiful application

For more information about Flutter. visit www.fluttertutorial.in