Dynamically Updating GridLayoutManager's SpanCount Property

Question

I have a RecyclerView that uses a GridLayoutManager, and I need to dynamically calculate the SpanCount value. I am able to calculate this value in the LayoutChange event, but if I attempt to edit the GridLayoutManager by setting the SpanCount property or calling SetLayoutManager with a new GridLayoutManager the RecyclerView is not displayed. How/where/when should I update the SpanCount? Note: I will only need to recalculate the SpanCount during OnResume, because the width of the area where my RecyclerView is located does not change

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

I put the RecycleView in the Linearlayout, then I set the LayoutChange event for Linearlayout, I use set SpanCount like following code, it could Updating GridLayoutManager's SpanCount dynamically.

   PhotoAlbumAdapter mAdapter = new PhotoAlbumAdapter(photoAlbum);  
               mRecyclerView.SetAdapter(mAdapter);  
     
               GridLayoutManager mLayoutManager = new GridLayoutManager(this,2);  
            
               mRecyclerView.SetLayoutManager(mLayoutManager);  
               linearLayout1.LayoutChange += (o, e) =>  
               {  
                   mLayoutManager.SpanCount = 3;  
               };  

If you still cannot work, please share your part of code or demo that could reproduce this issue.

Best Regards,

Leon Lu

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