title: Is it possible to start a functionality with RFID or NFC when phone is in standby (i.e. screen is off)?
body: <p>So I'm starting to get into Android development, but I'm not fully aware of all the possibilities yet.</p>
  
  <p>For my first bigger project I want to make an application that allows me to track my traveling with the push of a button. Another button will cancel the trip and calculate the traveled distance for me. I figured I could use Google Maps API for this.</p>
  
  <p>I need to use this app every day for it to be effective, but this is something that could easily be forgotten.</p>
  
  <p><strong>TL;DR:</strong> Is there a possibility I can activate a specific function in my app by putting an RFID tag in my car and putting my phone on top of it. When it comes off, the functionality will also stop.</p>
  
  <p>Keep in mind, this needs to be done when my phone screen is off, so use it more as a service.</p>
  
  <p><strong>Storyboad:</strong></p>
  
  <ol>
  <li>Get in car</li>
  <li>Put phone on RFID tag</li>
  <li>Start tracking</li>
  <li>Take phone off RFID tag</li>
  <li>Stop tracking trip and calculate travel distance</li>
  <li>Get out car</li>
  </ol>