B4A Library NFC library

Erel · Feb 12, 2012

Edit: The latest version of this library is an internal library preinstalled with the IDE.

See the tutorial here: http://www.b4x.com/forum/basic4andr...torials/14931-reading-ndef-data-nfc-tags.html

An improved version of this library is available here: http://www.b4x.com/android/forum/th...oding-to-nfc-library.15946/page-2#post-164470

DonManfred · Jul 21, 2015

Please find an updated Library attached.
Just changed the subname. Set version to 1.26

BW17 · Jul 22, 2015

Hello,

Sorry for my very bad english...

Is it possible to get the physical adress (serial number) of the tag with NFC library ?

If yes, how do this please.

Thanks in advance.

Erel · Jul 22, 2015

Check the output of Log(Activity.GetStartingIntent.ExtrasToString). It will print all the available information.

BW17 · Jul 22, 2015

Many thanks Erel,

But i don't understand why scanning the same tag 3 times, the "android.nfc.extra.ID" is never the same ?
It is not the tag ID ?

Bundle[{android.nfc.extra.NDEF_MESSAGES=[Landroid.os.Parcelable;@424bb968, android.nfc.extra.ID=[B@424bcef8, android.nfc.extra.TAG=TAG: Tech [android.nfc.tech.NfcA, android.nfc.tech.MifareUltralight, android.nfc.tech.Ndef]}]
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
Bundle[{android.nfc.extra.NDEF_MESSAGES=[Landroid.os.Parcelable;@424f71e8, android.nfc.extra.ID=[B@424f7400, android.nfc.extra.TAG=TAG: Tech [android.nfc.tech.NfcA, android.nfc.tech.MifareUltralight, android.nfc.tech.Ndef]}]
** Activity (main) Pause, UserClosed = false **
** Activity (main) Resume **
Bundle[{android.nfc.extra.NDEF_MESSAGES=[Landroid.os.Parcelable;@4250f2d0, android.nfc.extra.ID=[B@4250f4e8, android.nfc.extra.TAG=TAG: Tech [android.nfc.tech.NfcA, android.nfc.tech.MifareUltralight, android.nfc.tech.Ndef]}]

Erel · Jul 23, 2015

Try this code:

B4X:

Dim id() As Byte = Activity.GetStartingIntent.GetExtra("android.nfc.extra.ID")
Dim bc As ByteConverter
Log("id: " & bc.HexFromBytes(id))

BW17 · Jul 23, 2015

Thanks again Erel.

Works fine !

Jmu5667 · Aug 14, 2015

Nearly finished our first NFC app, combination of B4A, VB6, SQL Server.

Jmu5667 · Aug 17, 2015

We will be staring work on iBeacons next week

fabpalma · Nov 20, 2015

Erel, what about using your library also to emulate NFC tags ?
Starting from Android 4.4 there is this possibility.
Here there is the code (I don't know how to do a library from this Java code....)

http://developer.android.com/samples/CardEmulation/index.html

I would use my Sony Smartwatch as NFC tag ....

Regards.
Fab

coslad · Nov 20, 2015

I need it too !!!

bioident · Nov 22, 2015

DonManfred said:
Please find an updated Library attached.
Just changed the subname. Set version to 1.26

What new in NFC 1.26 ?

raphaelcno · Nov 22, 2015

bioident said:
What new in NFC 1.26 ?

GeTagtUID has been renamed to GetTagUID ("t" has been moved).

bioident · Nov 23, 2015

ok thanks

I have question
How can I change key A ,B NFC from NFC library.
I want save data on card and I have to change security code.

B4A Library NFC library

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