On Tue, Aug 21, 2012 at 3:40 AM, Nikolay Elenkov <[email protected]>wrote:
> On Mon, Aug 20, 2012 at 8:55 PM, Zoltán Páll <[email protected]> wrote: > > Hello, > > > > > > There are many topics that describe how to work with tags, but I'm > trying to > > only detect when another phone was put close to mine, even if it's not > > sending anything. Just switched on screen and tapped to mine. The system > > plays some sound, so it's somehow hooked somewhere, but I can't get an > > intent in my app. > > > > > > There is no reliable way to do this. What are you trying do do? > > I'm trying to do an "NFC promotion stand", where people would come and lay their card or phone and would get a sales coupon or a photo taken. I don't need to read any info or filter out cards. As I wrote before, it works OK with the cards but the phones need some software to "emit" the signal. I'm trying to work around this. I'd like to avoid the step where the user downloads and installs another piece of software. As you said, it probably needs more low-level APIs than those included in Android SDK. Thanks for your reply. > A 'phone' can be anything: it can act as a card/tag if it is in card > emulation > mode, or it can be sending you data in P2P mode. It can even be acting > as a reader and trying to read *your* device. > > Generally, the Android NFC APIs are fairly high level, so you can't really > do whatever you want. You have to stick to the higher level abstractions: > reading a tag, NDEF push, Android Beam, etc. > > > > > My app gets an intent when scanning a chip, but when putting another > phone > > close, it only plays the sound (as if it failed, or as if it didn't have > an > > app to handle the intent). Any idea how to do this? All I need is the > event > > when someone puts an NFC chip/device in range. > > It tries to start P2P and fails, hence the sound. TAG_DISCOVERED should > work as a general event, but for phones it will only work (maybe) if the > device > is in card emulation mode. And, AFAIK, you can really disable the built-in > P2P logic (disabling Android Beam from Settings doesn't seem to do it), but > I haven't really looked into this. > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
