[안드로이드 스튜디오] RecyclerView 위로 스크롤하기

                //즉각 
                LinearLayoutManager mlayoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();
                mlayoutManager.scrollToPositionWithOffset(0, 0);
 
 
                 //부드럽게 올라가는거
                mRecyclerView.smoothScrollToPosition(0);