android - LayoutAnimationController不起作用

Question

我的Activity里有一个ListView，然后再onCreate()方法中添加了如下代码，希望能测试一下LayoutAnimationController，但跑出来没有达到预定的效果，请问这里有什么问题吗？

    AnimationSet animationSet = new AnimationSet(true);

    AlphaAnimation alphaAnimation = new AlphaAnimation(0.0f, 1.0f);
    alphaAnimation.setDuration(500);
    animationSet.addAnimation(alphaAnimation);

    TranslateAnimation translateAnimation = new TranslateAnimation(
            Animation.RELATIVE_TO_SELF, 0.0f,
            Animation.RELATIVE_TO_SELF, 0.0f,
            Animation.RELATIVE_TO_SELF, -1.0f,
            Animation.RELATIVE_TO_SELF, 0.0f);
    translateAnimation.setDuration(500);
    animationSet.addAnimation(translateAnimation);

    LayoutAnimationController controller = new LayoutAnimationController(animationSet, 0.5f);
    controller.setOrder(LayoutAnimationController.ORDER_NORMAL);
    mListView.setLayoutAnimation(controller);