NFC source code
Rick
Kapil Israni
Sent from my iPhone. Please excuse typos and terseness.
Well after watching the Google I/O's how to NFC segment I went and ordered some tags for us to start playing with here in the office. They just rocked up today and I was hoping the powers that be could provide the source code or examples etc for a simple venue checkin.Thanks in advance!
--
To post to this group, send email to foursqu...@googlegroups.com
http://groups.google.com/group/foursquare-api
Rick
- Mifare Classic Racetrack 49 x 81 mm
- Mifare Classic Bullseye 40 mm
Akshay Patil
NFC check-ins are Android intent powered. Just write something a url
of the format "http://m.foursquare.com/checkin?vid=%venueid%" to the
tag (via an app like TagWriter, available in the android market) and
the Android tag reader should do the rest!
~ak
--
Akshay Patil / Foursquare Platform Evangelist
@akdotcom / @foursquareapi
Mohan Arun
>of the format "http://m.foursquare.com/checkin?vid=%venueid%" to the
>tag (via an app like TagWriter, available in the android market) and
>the Android tag reader should do the rest!
Is this something which can be done by the owner of a venue so when
patrons
come in they can 'scan' the QR code placed near the entrance and they
will be checked in to the venue?
But Wikipedia says the NFC range is 4 cm or less? Patrons will have to
swipe their handhelds too close
for this range to work for identifying the venue via QR?
Do you think they could make 'disposable' one-time use only (OT) tags
so you could pick one near a venue entrance, scan it, and it will
'check you in'?
Am I missing something here or am I thinking 'outside the box' too
much?
- Mohan
http://www.mohanarun.com
Akshay Patil
foursquare URL payload I linked to earlier and when the user clicks on
it, Android will recognize the installed foursquare app's intent to
handle that URL and direct the user to the foursquare app
appropriately.
For other Android intents you can surface, check out:
http://code.google.com/p/foursquared/wiki/FoursquareIntents
~ak
--
Akshay Patil / Foursquare Platform Evangelist
@akdotcom / @foursquareapi
Dave Ingram
>> NFC check-ins are Android intent powered. Just write something a url
>> of the format "http://m.foursquare.com/checkin?vid=%venueid%" to the
>> tag (via an app like TagWriter, available in the android market) and
>> the Android tag reader should do the rest!
> NFC check-ins is new to me:
> Is this something which can be done by the owner of a venue so when
> patrons
> come in they can 'scan' the QR code placed near the entrance and they
> will be checked in to the venue?
>
> But Wikipedia says the NFC range is 4 cm or less? Patrons will have to
> swipe their handhelds too close
> for this range to work for identifying the venue via QR?
printed, or even displayed on a huge billboard (like in Japan). It uses
the phone's camera, and is a bit like a barcode. Once it's printed, it
can never change. It does rely on a suitable contrast between
white/black sections in order to work, so a decent light source is
usually required in dark areas.
NFC is a short-range radio technology, and is similar to some of the
anti-theft tags used in shops (in the same way that a QR code is similar
to a barcode). NFC tags can hold data, and can be read by a device that
is sufficiently close. It requires special hardware in the reader, but
because it's radio-based, the tag itself can be embedded invisibly in
another object. You should also be aware that NFC tags can be rewritten
by anyone with the right hardware.* This hardware for writing tags
already exists in some phones like the Nexus S. Other examples of NFC
tags are some rapid transit cards (e.g. London's Oyster card) and some
building entry/access cards.
> Do you think they could make 'disposable' one-time use only (OT) tags
> so you could pick one near a venue entrance, scan it, and it will
> 'check you in'?
With the assistance of an app to ensure the code is only ever used once
(and you'd have to decide whether this is once per 4sq account or once
by anyone, ever) this is indeed possible. I think it would be easiest to
do this with QR codes rather than NFC tags.
Dave
* Yes, this is a generalisation to keep the explanation simple. Some
tags can be made permanently read-only, or they might have some crypto
that requires authentication with some keys before write access is granted.
Luke
mentioned it used intent, but it the post had no reference as to what
intent it might be powered by ;-)
Mohan Arun
> > so you could pick one near a venue entrance, scan it, and it will
> > 'check you in'?
>
> With the assistance of an app to ensure the code is only ever used once
> (and you'd have to decide whether this is once per 4sq account or once
> by anyone, ever) this is indeed possible. I think it would be easiest to
> do this with QR codes rather than NFC tags.
>
> Dave
time use tags
could be pre-printed and placed near a business entrance so patrons
can pick
one up, scan it with their phone and have themselves checked in to the
venue. The
one-time use is once per checkin.
Are there any how-to guides about how a biz owner can print QR codes
and patrons will scan the QR code and have themselves auto-checked in
to the venue?
- Mohan
michaelg
Are custom URI schemes like used by your iPhone app also supported by
your Android app? I mean like foursquare://venue/foo. See here:
http://groups.google.com/group/foursquare-api/browse_thread/thread/712c82fad08dd88e?pli=1.
-- Michael
On May 23, 11:07 am, Akshay Patil <a...@foursquare.com> wrote:
> Hey Rick,
>
> NFC check-ins areAndroidintent powered. Just write something aurl
> tag (via an app like TagWriter, available in theandroidmarket) and
Akshay Patil
--
Akshay Patil / Foursquare Platform Evangelist
@akdotcom / @foursquareapi
Luke
after the latest Foursquare update it seems to have broken. When I
scan the tag, Foursquare opens immediately now (previously Android
would ask what app I would like to open), but to a blank check-in
screen (a check-in screen with no details about the venue I'm checking
in to). It let's me check-in to the imaginary venue, but doesn't
actually record the check-in, or give me any points or anything like
that.
Any ideas as to what's happened in the latest update?
> No, they're not supported on Android. In general we try to normalize on thehttp://m.foursquare.comurls for NFC/QR/etc. because it degrades gracefully
>
> ~ak
> --
> Akshay Patil / Foursquare Platform Evangelist
> @akdotcom / @foursquareapi
>
>
>
>
>
>
>
> On Tue, May 24, 2011 at 10:03 PM, michaelg <mike...@gmail.com> wrote:
> > Hi Akshay,
>
> > Are custom URI schemes like used by your iPhone app also supported by
> > your Android app? I mean like foursquare://venue/foo. See here:
>
> > .
Akshay Patil
We made a change to register the foursquare app to launch directly for
read NFC tags (rather than requiring the built in Tags app to publish
the intent). It *should* just continue working with the intent URLs I
mentioned earlier. What's the URL you've written to your tag?
~ak
--
Akshay Patil / Foursquare Platform Evangelist
@akdotcom / @foursquareapi
Luke
was working fine last week using the intent method. I've tried re-
writting the tag just in case, but no joy.