Imageview parallax as you scroll

Question

I saw many examples demonstrative parallax background as you scroll or listview parallax but I cannot find a clear example how to implement a parallax effect on images as yo

Answer 1

   scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
        @Override
        public void onScrollChanged() {
            int top = scrollView.getScrollY(); // Increases when scrolling up ^
            if(top != 0) {
                int newTop = (int) (top * .5f);
                imageFrame.setTop(newTop < 0 ? 0 : newTop);
            }
        }
    });