Code for Article on Medium 1

HorizontalPicker.java

...
  getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                try {

                    getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    int w = getWidth();
                    addItemDecoration(new EndOffsetDecoration(w - 50));
                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        });

...