RecyclerView GridLayoutManager: how to auto-detect span count?

Question

Using the new GridLayoutManager: https://developer.android.com/reference/android/support/v7/widget/GridLayoutManager.html

It takes an explicit span count, so the pro

Answer 1

Set spanCount to a large number (which is the max number of column) and set a custom SpanSizeLookup to the GridLayoutManager.

mLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
    @Override
    public int getSpanSize(int i) {
        return SPAN_COUNT / (int) (mRecyclerView.getMeasuredWidth()/ CELL_SIZE_IN_PX);
    }
});

It's a bit ugly, but it work.

I think a manager like AutoSpanGridLayoutManager would be the best solution, but i didn't find anything like that.

EDIT : There is a bug, on some device it add blank space to the right