Android Unknown animation name: layoutAnimation

这个问题是我在用代码设置layoutAnimation时出现的

val animation = AnimationUtils.loadAnimation(this,R.anim.anim_item);
val controller = LayoutAnimationController (animation); controller.setDelay(0.5f);
 controller.setOrder(LayoutAnimationController.ORDER_NORMAL);
 listView.setLayoutAnimation(controller);

anim文件的确是存在的,但是却一直报这个错误

解决方案:

 val animation = AnimationUtils.loadLayoutAnimation(activity,R.anim.anim_layout);
 listView.layoutAnimation = animation;