Android read NFC tag data

Question

I am currently developing an app which will read NFC tags currently i have written the code to get TAG id what should i do next? How can i read all data if the intent extra namedEXTRA_NDEF_MESSAGES is empty.

the code for reading RFID i have for now is

public void onNewIntent(Intent intent) {
        Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);

        String zin =  tag.getTechList()[0];
        info.setText("TagID: " + bytesToHex(tag.getId())+" Saturs: "+zin);    

 }

I would like to know how to read all data in that NFC tag.

Thank you allready!

@Thomas there are lots similar app's that reads RFID cards using integrated phones NFC adapter! one of them is called e-talons reader and it works almost correctly...... i want to build something like that using the same tech. — J1and1, Nov 12 '12 at 12:56
@Thomas [e-talons reader](https://play.google.com/store/apps/details?id=com.janhouse.nfc.apis.mifare&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5qYW5ob3VzZS5uZmMuYXBpcy5taWZhcmUiXQ..) reads `Mifare Rfid cards` [NFClasic](https://play.google.com/store/apps/details?id=com.pocketluxus.nfclassic&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5wb2NrZXRsdXh1cy5uZmNsYXNzaWMiXQ..) reads `NFC` and `RFID` and both of them are using `NfcAdapter Class` to read them! — J1and1, Nov 13 '12 at 06:09
Where is the documentation? Because neither of those apps list RFID on their page. — ThomasRS, Nov 13 '12 at 11:03
@Thomas Ok! maybe i am wrong, bu you could at least tell me how to read all data from that `NFC` tag if `ndef_messages` are empty — J1and1, Nov 13 '12 at 13:05

score 0 · Accepted Answer · edited Jan 05 '13 at 00:05

0

Depends on your TAG's type. An example for an ultralight mifare

Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
MifareUltralight uTag = MifareUltralight.get(tagFromIntent);
uTag.connect(); //You should enclose this into a try-catch because of probably IOException
byte[] data = uTag.readPages(INDEX_OF_PAGES_YOU_WANT); //This returns 4 consecutive pages from the offset you declared. Each page weights 4 bytes
uTag.close();

edited Jan 05 '13 at 00:05

Rasman

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answered Nov 23 '12 at 20:17

noni

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Thank you! that just did the what i needed :D – J1and1 Nov 26 '12 at 08:09

Android read NFC tag data

1 Answers1