title: Read NFC tag present before app launch
body: <p>I'm trying to read NFC tag using NfcAdapter (<a href="https://developer.android.com/reference/android/nfc/NfcAdapter.html" rel="nofollow noreferrer">https://developer.android.com/reference/android/nfc/NfcAdapter.html</a> )</p>
  
  <p>It is working fine, but if the tag was already present before I start my application, it is not detected.</p>
  
  <p>Is it possible to read it without having to put it away and rescan it ?</p>
  
  <p>I tried with other apps (TagInfo, NFC Tools, ...) and all seem to have the same problem. Is it a limitation ?</p>
  
  <p>But when I'm installing the app the first time, the tag is detected. I guess the first time the app ask for NFC access permission or something like this...</p>