title: Google Document Viewer shows "No Preview Available"
body: <p>I have used Google Document Viewer to open PDF files in my Android device.  A black screen with "No Preview Available" text is shown, instead of opening my PDF files. I have tested with sample PDF files from Google. They are working fine, but not my PDF files. Is there anything that i need to do from code side to view my PDF.</p>
  
  <pre><code>http://docs.google.com/viewer?url=myurl.pdf
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/0Qdvw.png" alt="enter image description here"></p>