title: Host card emulation on Android (4.4 / KitKat and above) with Nexus 5
body: <p>I'm trying to emulate an NFC tag with my Nexus 5 according to <a href="http://developer.android.com/guide/topics/connectivity/nfc/hce.html">this document</a>, but my service is never invoke.
  Should I turn off Android beam?</p>
  
  <p>I'd like to emulate a simple tag containing a url.</p>
  
  <p>The reader is a Nexus 7 (2012) and I've figured out the process like a simple scan of a NFC tag using Android beam on Nexus 7.</p>
  
  <p>In addition I'm a bit confused about aid-filter name. Is there a list of them?</p>
  
  <p>I'm sure that I don't understand something.
  Thanks</p>