@Override
    public void onNextItemAppear(View view) {

        View descriptionLayout = view.findViewById(R.id.description_layout);
        if(descriptionLayout!=null){
            float layoutY = ViewHelper.getY(descriptionLayout);
            view.findViewById(R.id.description_layout).setVisibility(View.VISIBLE);
            ValueAnimator animator = ObjectAnimator.ofFloat(
                    descriptionLayout,"y",layoutY + descriptionLayout.getHeight(),
                    layoutY).setDuration(500);
            animator.start();
        }

    }
When next item show in ViewPagerEx, let's make an animation to show the
description layout.
@param view
library/src/main/java/com/daimajia/slider/library/Animations/DescriptionAnimation.java