RecyclerView remove divider / decorator after the last item

Question

I have a quite simple RecyclerView.
This is how I set the divider:

DividerItemDecoration itemDecorator = new DividerItemDecoration(getContext(), DividerI         


        

Answer 1

The accepted answer doesn't allocate space for decoration as it does not override getItemOffsets()

I have tweaked the DividerItemDecoration from support library to exclude the decoration from the last item

public class DividerItemDecorator extends RecyclerView.ItemDecoration {

    private Drawable mDivider;
    private final Rect mBounds = new Rect();

    public DividerItemDecorator(Drawable divider) {
        mDivider = divider;
    }

    @Override
    public void onDraw(Canvas canvas, RecyclerView parent, RecyclerView.State state) {
        canvas.save();
        final int left;
        final int right;
        if (parent.getClipToPadding()) {
            left = parent.getPaddingLeft();
            right = parent.getWidth() - parent.getPaddingRight();
            canvas.clipRect(left, parent.getPaddingTop(), right,
                    parent.getHeight() - parent.getPaddingBottom());
        } else {
            left = 0;
            right = parent.getWidth();
        }

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount - 1; i++) {
            final View child = parent.getChildAt(i);
            parent.getDecoratedBoundsWithMargins(child, mBounds);
            final int bottom = mBounds.bottom + Math.round(child.getTranslationY());
            final int top = bottom - mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(canvas);
        }
        canvas.restore();
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {

        if (parent.getChildAdapterPosition(view) == state.getItemCount() - 1) {
            outRect.setEmpty();
        } else
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
    }
}

To apply the decorator, use

RecyclerView.ItemDecoration dividerItemDecoration = new DividerItemDecorator(dividerDrawable);
recyclerView.addItemDecoration(dividerItemDecoration);

The source for including orientation can be found here https://gist.github.com/abdulalin/146f8ca42aa8322692b15663b8d508ff