public class DividerItemDecoration extends ItemDecoration {
 private static final int[] ATTRS = new int[]{16843284};
 public static final int HORIZONTAL_LIST = 0;
 public static final int VERTICAL_LIST = 1;
 private Drawable mDivider;
 private int mOrientation;

 public DividerItemDecoration(Context context, int orientation) {
  TypedArray a = context.obtainStyledAttributes(ATTRS);
  this.mDivider = a.getDrawable(0);
  a.recycle();
  this.setOrientation(orientation);
 }

 public void setOrientation(int orientation) {
  if(orientation != 0 && orientation != 1) {
   throw new IllegalArgumentException("invalid orientation");
  } else {
   this.mOrientation = orientation;
  }
 }

 public void onDraw(Canvas c, RecyclerView parent) {
  if(this.mOrientation == 1) {
   this.drawVertical(c, parent);
  } else {
   this.drawHorizontal(c, parent);
  }

 }

 public void drawVertical(Canvas c, RecyclerView parent) {
  int left = parent.getPaddingLeft();
  int right = parent.getWidth() - parent.getPaddingRight();
  int childCount = parent.getChildCount();

  for(int i = 0; i < childCount; ++i) {
   View child = parent.getChildAt(i);
   LayoutParams params = (LayoutParams)child.getLayoutParams();
   int top = child.getBottom() + params.bottomMargin;
   int bottom = top + this.mDivider.getIntrinsicHeight();
   this.mDivider.setBounds(left, top, right, bottom);
   this.mDivider.draw(c);
  }

 }

 public void drawHorizontal(Canvas c, RecyclerView parent) {
  int top = parent.getPaddingTop();
  int bottom = parent.getHeight() - parent.getPaddingBottom();
  int childCount = parent.getChildCount();

  for(int i = 0; i < childCount; ++i) {
   View child = parent.getChildAt(i);
   LayoutParams params = (LayoutParams)child.getLayoutParams();
   int left = child.getRight() + params.rightMargin;
   int right = left + this.mDivider.getIntrinsicHeight();
   this.mDivider.setBounds(left, top, right, bottom);
   this.mDivider.draw(c);
  }

 }

 public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
  if(this.mOrientation == 1) {
   outRect.set(0, 0, 0, this.mDivider.getIntrinsicHeight());
  } else {
   outRect.set(0, 0, this.mDivider.getIntrinsicWidth(), 0);
  }

 }
}

 public void drawVertical(Canvas c, RecyclerView parent) {
  int left = parent.getPaddingLeft();
  int right = parent.getWidth() - parent.getPaddingRight();
  int childCount = parent.getChildCount();

  for(int i = 0; i < childCount; ++i) {
   View child = parent.getChildAt(i);
   LayoutParams params = (LayoutParams)child.getLayoutParams();
   int top = child.getBottom() + params.bottomMargin;
   int bottom = top + this.mDivider.getIntrinsicHeight();
   this.mDivider.setBounds(left, top, right, bottom);
   this.mDivider.draw(c);
  }

 }

 public void drawVertical(Canvas c, RecyclerView parent) {
  int left = parent.getPaddingLeft();
  int right = parent.getWidth() - parent.getPaddingRight();
  int childCount = parent.getChildCount();

  for(int i = 0; i < childCount-1; ++i) {
   View child = parent.getChildAt(i);
   LayoutParams params = (LayoutParams)child.getLayoutParams();
   int top = child.getBottom() + params.bottomMargin;
   int bottom = top + this.mDivider.getIntrinsicHeight();
   this.mDivider.setBounds(left, top, right, bottom);
   this.mDivider.draw(c);
  }

 }