title: How do you test if String is in URL format?
body: <p>Okay, there must be an easy approach I'm missing here, but I'm drawing a blank. I have a custom <code>ListView</code> that gets some of its images from files on the external storage, some from the internet, and if neither of those it displays a PNG file from the drawable folder. For my logic, I need to be able to tell if a <code>String</code> (image location) is an URL type or File type.</p>
  
  <p>So, how would I be able to tell if a <code>String</code> is in URL format or File format? </p>