Hide an NDEF record into the NDEF Message?

Question

I have developped 2 Android applications. The first one, to write into an NFC tag, and the second to read the contents I have written .

This is what i did in the first application (WriteNFC)

private NdefRecord createRecord1(String data)
{ 
byte[] payload = data.getBytes(Charset.forName("UTF-8"));
byte[] empty = new byte[] {};
return new NdefRecord(NdefRecord.TNF_ABSOLUTE_URI, empty, empty, payload);
}
private NdefRecord createRecord2(String data)
{ 
byte[] payload = data.getBytes(Charset.forName("UTF-8"));
byte[] empty = new byte[] {};
return new NdefRecord(NdefRecord.TNF_ABSOLUTE_URI, payload, empty, empty);
}

And in the second application (ReadNFC)

NdefRecord cardRecord = msg.getRecords()[1];//Extract the second Record
String url_data = new String(cardRecord.getType());//Read data type

When I read with my own application (ReadNFC), of course I had on screen only the payload of the second Record, which I stored through "Record Type". But with a third-party application, especially that natively installed ("tag") -shown in photo-, It display correctly the first record, and for the second it's an empty field. How can I hide this field. Otherwise, how can I force the other third-party applications to not read the second record?

Answer 1

You simply cannot do that. Android will read the complete NDEF messages (i.e. all records) and pass it on in the Intent to an app.