title: How to scan the barcode of format PDF 417 using zxing app in android?
body: <p>How do i scan the barcode of format PDF417 ? Do i need to pass intent extras? 
  (Note : Zxing barcode app is already installed in my device). Please help me.
  Here is my code for using Zxing barcode scanner from my application using Intent</p>
  
  <pre><code> Intent intent = new Intent("com.google.zxing.client.android.SCAN");
   intent.setPackage("com.google.zxing.client.android");
   intent.putExtra("SCAN_MODE", "PRODUCT_MODE");
   startActivityForResult(intent, MY_ACTIVITY_CONSTANT);
  </code></pre>