Flutter for Beginners

Revisiting our animation

To break down our code, modify our animation, and make it more maintainable, we start separating what we need for each responsibility. Typically, three things are needed:

• The animation itself: Here, we do not need to change anything. Our AnimationController will still be the same.
• Add the AnimatedBuilder widget to our build() method: We will be extracting much of the code related to the animation of the button to make it clear.
• The child widget: In our case, it is just RaisedButton that changes according to the progress of the animation:

class _AnimationBuilderAnimationsState extends State<AnimationBuilderAnimations>    with SingleTickerProviderStateMixin {  AnimationController _controller; Animation<ButtonTransformation> ...