[android-developers] Re: Sending APDU Command from Nexus S

Hi,

Am facing the exact same issue, and the logcat shows that the native
function seems to be losing the connection to the card on the
transcieve().
I increased the timeout and that didn't solve the issue either.

Please let me know if you find a solution :-)

Thanks,
Priti

On May 3, 11:50 pm, Wilson Chew <lhchew1...@gmail.com> wrote:
> Hi All,
>
> I noticed that the connection created (using IsoDep) is not stable.
> For example, when I perform a signing(digital signature) and
> verification of signature via APDU, the NFC service will die or
> connection totagwill belosteven if I set the timeout to 20sec. It
> happen quite often.
>
> Is it a known issue or I have missed out something in my code?
>
> Thanks.
>
> Regards,
> Wilson
>
> On Apr 26, 5:09 pm, perumal316 <perumal...@gmail.com> wrote:
>
>
>
> > For IsoDep using setTimeOut function to set a time resolves the issue.
>
> > On Apr 26, 12:13 pm, perumal316 <perumal...@gmail.com> wrote:
>
> > > Hi Michael,
>
> > > I changed MiFareClassic object to IsoDep. But I am getting the
> > > following error:
>
> > > "android.nfc.TagLostException:Tagwaslost"
>
> > > Must I add in additional code to sustain the connection? (Am I
> > > correct?)
>
> > > Thanks In Advance,
> > > Perumal
>
> > > On Apr 25, 5:00 pm, Michael Roland <mi.rol...@gmail.com> wrote:
>
> > > > Hallo Wilson,
>
> > > > > I am facing an issue with a Mifare Classic card (this is a dual
> > > > > interface smart card; contact and contactless).
>
> > > > Alright, then it is most likely not a MIFARE Classic card but a
> > > > contactless (dual interface) smart card (with ISO 14443-4 interface)
> > > > that additionally provides a MIFARE Classic emulation.
>
> > > > > When I use transceive() to send apdu corresponding to "select AID", it always
> > > > > return null.
>
> > > > Right, as you write here:> 2) Create MifareClassic object using
>
> > > > you create a MifareClassic but what you really want to do is open an
> > > > APDU connection to the card. If your card is a real dual-interface
> > > > smart card(*) it should also expose an IsoDep interface (ISO 14443-4 /
> > > > ISO 7816-4). This is the interface you would want to use for APDU
> > > > communication.
>
> > > > br,
> > > > Michael
>
> > > > (*) There could also exist some hybrid cards that have a MIFARE
> > > > Classic _contactless_ card and an APDU-based _contact_ smart card
> > > > joined into the same plastic card. In that case the contact and
> > > > contactless parts would be independent chips and no communication
> > > > between them would be possible.- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

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