listview动画效果 递增式出现

private LayoutAnimationController getListAnim() {
    AnimationSet set = new AnimationSet(true);
    Animation animation = new AlphaAnimation(0.0f, 1.0f);
    animation.setDuration(200);
    set.addAnimation(animation);

    animation = 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);
    animation.setDuration(200);//设置动画时间
    set.addAnimation(animation);
    LayoutAnimationController controller = new LayoutAnimationController(
            set, 0.5f);
    return controller;

}

mLv.setLayoutAnimation(getListAnim());