Here is how we can have custom paddings in between cells for a RecyclerView.

Decoration

First create a custom Decoration object like this:

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/**
 * This is used for adapters that has custom cell spacings.
 * For example:
 * - The register choose business screen has 11dp in between the cell.
 * - The register choose account type single/group screen has 20dp in between the cell.
 */
class CustomSpacingDecoration
/**
 * Create a decoration to add space in between the cell.
 * @param middleSpaceInPixel The space in between the cell in pixel.
 */(middleSpaceInPixel: Int) : RecyclerView.ItemDecoration() {
    private val mMiddleSpaceInPixel: Int = middleSpaceInPixel

    override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: RecyclerView.State) {
        super.getItemOffsets(outRect, view, parent, state)
        // Do not add space for the last item in cell
        if (parent.getChildAdapterPosition(view) != (parent.adapter?.itemCount ?: 0) - 1) {
            outRect.bottom = mMiddleSpaceInPixel
        }
    }
}

The above class will take in a number when init and take that number as the space between the cell.

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if (parent.getChildAdapterPosition(view) != (parent.adapter?.itemCount ?: 0) - 1)

This if statement make sure that we only add this space in between. Exclude the last element in recycler view.

Apply Decoration

Now we have this custom decoration class, the next step is to create the decoration instance and assign to a recycler view.

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recyclerView.addItemDecoration(new CustomSpacingDecoration((int) getResources().getDimension(R.dimen.button_account_type_padding_in_between)));

LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());