After complete the widget animation run a function in Flutter

Question

In Flutter framework by extending the AnimatedWidget class is implemented a simple animation widget that changes color. How is it possible after complete the widget animation run a function?

Answer 1

You can listen on the status of an AnimationController:

var _controller = new AnimationController(
    0.0, 
    const Duration(milliseconds: 200),
);

_controller.addStatusListener((status) {
  if(status == AnimationStatus.completed) {
    // custom code here
  }
});    

Animation<Offset> _animation = new Tween<Offset>(
  begin: const Offset(100.0, 50.0),
  end: const Offset(200.0, 300.0),
).animate(_controller);