title: Why do my images shrink after loading with glide library
body: <p>Hi I'm populating a gridview with glide image loader library when they first get called into my fragment they look like this <a href="https://i.stack.imgur.com/u2gZO.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/u2gZO.jpg" alt="perfect"></a>
  But after scrolling up and down they are resized and look like this <a href="https://i.stack.imgur.com/K2mMW.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/K2mMW.jpg" alt="too small"></a>
  Is this something I'm doing with my gridview, the glide library, or is it something else like my placeholder image? on the second screenshot If I press on an image it lights up to show it is in actual fact filling that whole space, anyone know what I'm doing wrong here? I've tried changing the call in glide playing with centercrop and such but it seems to make no difference, I'm not sure how I would work out the width and height of each cell, any suggestions welcome</p>
  
  <p>EDIT
   here is how im calling glide</p>
  
  <pre><code>   Glide.with(getActivity())
                  .load(mThumbIds[position])
                  .placeholder(R.drawable.placeholder)
                  .error(R.drawable.ic_drawer)
                  .centerCrop()
                  .override(500,300)
                  .into(imageView);
  </code></pre>