GridLayoutManager Using Wrong Orientation

Question

I have a RecyclerView that uses a GridLayoutManager as follows:

this.rvWinnings.SetLayoutManager(new GridLayoutManager(this, maxbtns, GridLayoutManager.Horizontal, false));

My expectations would be that the first item would be in the upper left, the second item to the right of that, the third to the right, up to maxbtns columns, then start the next row, as follows:

0 1 2 3 4 5
6 7 8 9 10 11

However, it is giving me the following:

0 6
1 7
2 8
3 9
4 10
5 11

If I switch the orientation, then it switches it here, so it's not hard to get what I want, but why does GridLayoutManager interpret the orientations differently than LinearLayoutManager? I want to make sure I am not missing something so I don't end up messing something up later.

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

The second parameter of the GridLayoutManager's constructor method is spanCount. It represents represents the number of rows or columns in this direction. When the third parameter is GridLayoutManager.Horizontal, 'spanCount' represent the rows. So please set the third parameter to GridLayoutManager.Vertical instead.

   adapter = new CustomAdapter(this, data);  
   var layoutManager = new GridLayoutManager(this, number, GridLayoutManager.Vertical, false);  
   recyclerView.SetAdapter(adapter);  
   recyclerView.SetLayoutManager(layoutManager);  

Best Regards,

Jarvan Zhang

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