title: How to use plugin PDFViewer in cordova
body: <p>I write an app in cordova, and want to open pdf file. 
  I used plugin 
  <a href="https://github.com/cdibened/PDFViewer" rel="nofollow noreferrer">https://github.com/cdibened/PDFViewer</a>
  by use command:</p>
  
  <pre><code>cordova plugin add cordova-plugin-pdf-viewer
  </code></pre>
  
  <p>And then, i called this plugin by the same in documentation</p>
  
  <pre><code>PDFViewer.openPDF(url);
  </code></pre>
  
  <p>But it's not open the file. i don't know why and how to debug this.
  And <a href="https://drive.google.com/open?id=1N5sBtqki2mJYY-GE2-yLaoWyWRB3X5Zy" rel="nofollow noreferrer">here</a> is my project. 
  Thanks for your helps!</p>