keep view's padding when changing 9patch background

gistfile1.java

    public void setBackgroundResource(View v, int id) {
        int bottom = v.getPaddingBottom();
        int top = v.getPaddingTop();
        int right = v.getPaddingRight();
        int left = v.getPaddingLeft();

        v.setBackgroundResource(id);
        v.setPadding(left, top, right, bottom);
    }