ParallaxHeader

Set ParallaxHeader:

 ultimateRecyclerView.setParallaxHeader(getLayoutInflater().inflate(R.layout.parallax_recyclerview_header, ultimateRecyclerView.mRecyclerView, false));
        ultimateRecyclerView.setOnParallaxScroll(new UltimateRecyclerView.OnParallaxScroll() {
            @Override
            public void onParallaxScroll(float percentage, float offset, View parallax) {
                Drawable c = toolbar.getBackground();
                c.setAlpha(Math.round(127 + percentage * 128));
                toolbar.setBackgroundDrawable(c);
            }
        });