title: Android NFC Card Emulation try to emulate a card
body: <p>I'm trying to use NFC to emulate a card.</p>
  
  <p>What I expect is that when I pass the phone on an NFC reader the reader reads the data (this data then I would modify in the future).</p>
  
  <ul>
  <li>I'm using this sample project: <a href="https://developer.android.com/samples/CardEmulation/index.html" rel="nofollow noreferrer">This sample project</a></li>
  <li>I'm using a Nexus 5.</li>
  <li>I'm using an ACS ACR128 reader: <a href="http://www.acs.com.hk/en/driver/36/acr128u-dual-interface-smart-card-reader/" rel="nofollow noreferrer">This reader</a></li>
  </ul>
  
  <p>Passing the phone on the reader, for what I understand, the entry point should be in the Java class <code>CardService.java</code>. But the method <code>processCommandApdu</code> is never called (I have tried to insert a breakpoint there and even a toast, but that code is never called).</p>
  
  <p>So at the moment the main thing that I can not understand is: Did I do something wrong? This thing can be done?</p>