ItemDecoration

[YiBeomSeok]

import android.graphics.Rect
import android.view.View
import androidx.recyclerview.widget.RecyclerView

class ItemDecoration(
    private val left: Int = 0,
    private val right: Int = 0,
    private val top: Int = 0,
    private val bottom: Int = 0,
    private val extraMargin: Int = 0
) : RecyclerView.ItemDecoration() {

    override fun getItemOffsets(
        outRect: Rect,
        view: View,
        parent: RecyclerView,
        state: RecyclerView.State
    ) {
        if (left != 0) outRect.left += left
        if (right != 0) outRect.right += right
        if (top != 0) outRect.top += top
        if (bottom != 0) outRect.bottom += bottom
        if (extraMargin != 0) {
            outRect.set(
                top + extraMargin,
                right + extraMargin,
                left + extraMargin,
                bottom + extraMargin,
            )
        }
    }
}

• recyclerview 객체에 addItemDecoration(ItemDecoration객체) 함수로 각 아이템에 마진을 추가할 수 있도록 합니다.

private fun initAdapter() {
        binding.rvFavoriteStores.addItemDecoration(
            ItemDecoration(
                extraMargin = resources.getDimension(R.dimen.cafe_item_space).roundToInt()
            )
        )
        binding.rvFavoriteStores.adapter = this.horizontalAdapter

        binding.rvStores.addItemDecoration(
            ItemDecoration(
                bottom = resources.getDimension(R.dimen.cafe_item_space).roundToInt(),
                extraMargin = resources.getDimension(R.dimen.cafe_item_space).roundToInt()
            )
        )
        binding.rvStores.adapter = this.verticalAdapter
    }

• 마진 값은 values.dimen에서 정의하여 값을 가져올 수 있습니다.