How to get the unique nfc id of a phone, without reading nfc on android?

Question

I know How to get Nfc Unique ID, When NFC Reader,

private Tag tag;

//Read success.
protected void onNewIntent(Intent intent) {
   super.onNewIntent(intent);

   tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);

   byte[] id = tag.getId();

}

but I want Even if I do not read the NFC card.

How to get NFC id, without reading nfc on android?

thanks.

What ID do you expect to get? The UID of the phone when it acts as a contactless card? — Michael Roland, Nov 29 '18 at 16:00
If yes, then this is a duplicate of https://stackoverflow.com/q/25195762/2425802 — Michael Roland, Nov 29 '18 at 16:03
Also see https://stackoverflow.com/q/27239473/2425802 and https://stackoverflow.com/q/19764476/2425802 — Michael Roland, Nov 29 '18 at 16:04

score 1 · Accepted Answer · answered Nov 26 '18 at 12:29

1

Mobile phones acting as a tag (card emulation) do have a random UID (4 byte). It is not supported to adjust a specific UID.

As result every time the external field is turned off and on again the mobile phone as a different UID.

Best regards,

answered Nov 26 '18 at 12:29

Alex

26
1

How to get the unique nfc id of a phone, without reading nfc on android?

1 Answers1