title: ZXing PDF417 + ALL_CODE_TYPES
body: <p>Using ZXing (on Android), if you initiate a PDF417 barcode scan like this...</p>
  
  <pre><code>List&lt;String&gt; oDesiredFormats = Arrays.asList("PDF_417".split(","));
  IntentIntegrator integrator = new IntentIntegrator(this);
  integrator.initiateScan(oDesiredFormats);
  </code></pre>
  
  <p>... and you initiate an "all codes" (except PDF417 and maybe a few others) barcode scan like this...</p>
  
  <pre><code>IntentIntegrator integrator = new IntentIntegrator(this);
  integrator.initiateScan();
  </code></pre>
  
  <p>... then how do you initiate a single barcode scan that will recognise both (all the standard codes, and PDF417)?  Thanks in advance!</p>