Animation Tween

 import "package:flutter/material.dart";

void main() {
  runApp(const AmanDemo(),);
}
class AmanDemo extends StatelessWidget {
  const AmanDemo({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: "Tween Animation in Flutter",
      theme: ThemeData(
        primarySwatch: Colors.brown,
      ),
      home: const TweenDemo(),
    );
  }
}
class TweenDemo extends StatefulWidget {
  const TweenDemo({super.key});

  @override
  State<TweenDemo> createState() {
    return TweenState();
  }
}
class TweenState extends State<TweenDemo> with SingleTickerProviderStateMixin {
  late Animation animation;
  late Animation colorAnimation;
  late AnimationController animationController;

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

    animationController = AnimationController(vsync: this, duration: const Duration(seconds: 2,),);
    animation = Tween(begin: 50.0, end: 300.0).animate(animationController);
    colorAnimation = ColorTween(begin: Colors.blue, end: Colors.orange).animate(animationController);

    animationController.addListener(() {
      print(animation.value);
      setState(() {},);
    },);

    animationController.forward();

  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Tween Animation"),
      ),
      body: Center(
        child: Container(
          width: animation.value,
          height: animation.value,
          color: colorAnimation.value,
        ),
      ),
    );
  }
}