title: Show PDF file in Android WebView using mozilla pdf.js Android API Level below 19
body: <p>I'm using <a href="https://github.com/pauldmps/Android-pdf.js" rel="noreferrer">mozilla pdf.js</a> in Android WebView to Show PDF files.</p>
  
  <p>Code is working fine in <strong>Android API Level 19</strong>.</p>
  
  <pre><code>Uri path = Uri.parse(Environment.getExternalStorageDirectory().toString() + "/test.pdf");
  webView.loadUrl("file:///android_asset/pdfviewer/index.html?file=" + path); 
  </code></pre>
  
  <p>But it's not working on <strong>Android API Level 16 and below</strong>.</p>
  
  <p>A White blank Screen displays on Device.</p>
  
  <p>Is there any way to resolve this issue?</p>