[Android] 스크롤 시 RecyclerView 아이템 간격 발생

평소대로 RecyclerView를 생성하고 run을 했는데 저렇게 아이템간 간격이 발생해서 매우 당황했습니다..😅

https://stackoverflow.com/questions/35817610/large-gap-forms-between-recyclerview-items-when-scrolling-down

stackoverflow에 의하면..

Its because you are using match_parent in height of root view of the row item in your vertically oriented listview/recyclerview. When you use that the item expands completely wrt to its parent. Use wrap_content for height when the recyclerview is vertically oriented and for width when it is horizantally oriented.

네.. root view의 height를 match_parent가 아니라 wrap_parent로 변경해야 한답니다!