Android gridview adjusting to screen size

Question

The grid view of my application has 3 rows and 3 columns. I want this to fill the screen ,irrespective of the screen size of the device.

I tried getting window size

Answer 1

Here I only changed width and height as match parent and wrap content.

And in the Mainclass add this -->

GridLayoutManager gridLayoutManager=new GridLayoutManager(this,2);
        recyclerView.setLayoutManager(gridLayoutManager);