VerticalTransformer.java

public class VerticalTransformer implements ViewPager.PageTransformer {
    private float yPosition;

    @Override
    public void transformPage(View view, float position) {
        view.setTranslationX(view.getWidth() * -position);
        yPosition = position * view.getHeight();
        view.setTranslationY(yPosition);
    }
}