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: Tag was lost"
>
> 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 -

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