Put an indeterminate progressbar as footer in a RecyclerView grid

It is very simple to do that.

The solution is to use the same approach of the LinearLayoutManager with a GridLayoutManager and then use the method setSpanSizeLookup on the LayoutManager like this:

mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
        public int getSpanSize(int position) {
                case MyAdapter.VIEW_TYPES.Product:
                    return 1;
                case MyAdapter.VIEW_TYPES.Progress:
                    return 2; //number of columns of the grid
                    return -1;

This will automatically make the item cover a full row of the grid (if the row is not totally empty this item goes to the next row).

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