listview自动滚动动画

AnimationSet set = new AnimationSet(false);
Animation translateAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, -1, Animation.RELATIVE_TO_SELF,0);
set.addAnimation(translateAnimation);
//Starting alpha value for the animation, where 1.0 means fully opaque and 0.0 means fully transparent.
//				ScaleAnimation scaleAnimation = new ScaleAnimation(0.8f, 1.2f, 0.8f, 1.2f);
//				set.addAnimation(scaleAnimation);
AlphaAnimation alphaAnimation = new AlphaAnimation(0.5f, 1.0f);
set.addAnimation(alphaAnimation);
set.setDuration(800);
set.setFillAfter(true);