Tween

Derived from Animatable<T> and used to generate numbers between any two numbers other than 0 and 1. It can be used along with Animation object by using animate method and passing actual Animation object.

AnimationController controller = AnimationController( 
   duration: const Duration(milliseconds: 1000), 
vsync: this); Animation<int> customTween = IntTween(
   begin: 0, end: 255).animate(controller);

• Tween can also used along with CurvedAnimation as below −

AnimationController controller = AnimationController(
   duration: const Duration(milliseconds: 500), vsync: this); 
final Animation curve = CurvedAnimation(parent: controller, curve: Curves.easeOut); 
Animation<int> customTween = IntTween(begin: 0, end: 255).animate(curve);