SpacingItemDecoration.java

public class SpacingItemDecoration extends RecyclerView.ItemDecoration {
  private int spacing;

  public SpacingItemDecoration(Context context, int padding) {
    DisplayMetrics metrics = context.getResources().getDisplayMetrics();
    spacing = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, padding, metrics);
  }

  @Override
  public final void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    int position = parent.getChildAdapterPosition(view);
    if (position != state.getItemCount() - 1) {
      outRect.bottom = spacing;
    }
  }
}