您可以侦听的状态
AnimationController:
var _controller = new AnimationController( 0.0, const Duration(milliseconds: 200),);_controller.addStatusListener((status) { if(status == AnimationStatus.completed) { // custom pre here }});Animation<Offset> _animation = new Tween<Offset>( begin: const Offset(100.0, 50.0), end: const Offset(200.0, 300.0),).animate(_controller);


