material calendar 커스텀 질문

Question

 

public void decorate(DayViewFacade view){
    view.addSpan(new DotSpan(5, color));
    view.addSpan(new StyleSpan(Typeface.BOLD));
    view.addSpan(new BackgroundColorSpan(Color.WHITE));
}

선택된 날짜들을 초록 원처럼 뒷배경으로 하고 싶은데 어떻게 해야하나요?

https://goatlab.tistory.com/928