Implicit Animations - TweenAnimationBuilder

main.dart

import 'package:flutter/material.dart';

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

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

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class OtusLogo extends StatelessWidget {
  final Color color;

  OtusLogo({@required this.color});

  @override
  Widget build(BuildContext context) {
    return Container(
      color: color,
      child: Image.network('https://github.com/flutter-cats/otus-cocktails-application/blob/master/logo-2.8602b.svg'),
      width: 200.0,
      height: 200.0,
    );
  }
}

class _MyHomePageState extends State<MyHomePage> {
  static final colorTween = ColorTween(begin: Colors.red, end: Colors.green);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Implicit Animations - TweenAnimationBuilder'),
      ),
      body: Center(
        child: TweenAnimationBuilder<Color>(
          tween: colorTween,
          duration: Duration(seconds: 2),
          builder: (_, Color colorValue, Widget child) {
            return OtusLogo(color: colorValue);
          },
        ),
      ),
    );
  }
}