GridLayoutManager setSpanCount not working in OnClickListener of a button

Question

Well, I want to change the span count of recycler view Grid layout manager's dynamically on click of a button.

    GridLayoutManager manager;

    @Override
    public void onClick(View v) {


        if(manager.getSpanCount() > 16)
        {
            manager.setSpanCount(1);
        }
        manager.setSpanCount( manager.getSpanCount()+1);

        mRecyclerView.setLayoutManager(manager);
    }

but when i try to change it on OnCreate in activity

it changes the gridSpanCount in the recyclerView.

Please tell me how to fix it. and it is also not working in onTouchListener on the view.

Answer 1

Just call adapter's notifyDataSetChanged() after setting new span count value.