title: Picasso OOM issue with large images
body: <p>I am loading a bunch of images in listview with picasso. I started getting OOM excpetions which was expected since i was just loading them without resize or fit.</p>
  
  <p>All the images are downloaded form internet and some of them are small but some are exceptionally big. I cant use fit() or size easily since i want the images to keep an aspect ration based on the image view width which is set to match parent, and height is wrap content. I have read that i should create a custom transform object but the issue is that i dont know the image view width in list views getView method (its reported as 0 since it still not messured)</p>
  
  <p><strong>First question:</strong>  Does picasso resize the actuall images on disk when using resize or fit? Or does it keep them with their downloaded size and then resizes them upon loading.
  <strong>Note: I tired fixing for example .resize(300,300) but still got OOM when loading that large image. 5615x374 is the size :)</strong>    thats why i am asking if picasso resizes the image on disk.</p>
  
  <p><strong>Seccond Question:</strong> How to fix the OOM, try to get screen size and use it for image view size in custom transformation and preserve the aspect ratio? Or what to do when faced with images this big...my phone is htc desire with just 512 ram 4.0 android.</p>