[android-developers] Re: RFID tag detection
I see what you mean; the RFID tags I am using are 13.56 Mhz, and the Nexus S can detect them and . If my understanding is correct, the way it happens is that when an 13.56 RFID or NFC tag is detected, a new intent is thrown with some kind of special added data and we resolve this intent to get the information out of it. I am doing the following: 1) call the resolveintent(Intent intent) function 2) Check if the action in the intent is TAG_DISCOVERED (this is always the case with my tags, maybe because they're not a type android is familiar with) 3) Then, I want to extract this UID: what should i call? intent.get ? Note: I tried Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); as isdescribed on the android website, but it returned null, probably because the tag type is unknown Thank you very much Pierre On May 18, 2:34 am, nemik ne...@nemik.net wrote: I don't know about a bit vector but most NFC tags (whether type A, B, Mifare 1k/Ultralight/etc) all have a UID. This is a unique identifier for the tag and what you're looking for. But the tags you use will have to be of the 13.56 MHz hi-frequency variety. You won't be able to read most older HID Prox cards for example because they operate on the 125 kHz frequency. On May 17, 5:19 pm, Pierre Yaacoub pierreyaac...@gmail.com wrote: Hello, I am trying to build an application that uses the new Android capability of detectingRFID(NFC) tags. The tags that I have are not NFC tags, that is, they are not of a special type (like URI ...). For my purposes, I do not care about parsing the tag data in a certain way (as would be the case in some NFC tags like URI or SmartText). I just need to access the bit vector that the tag sends, and use it as a unique identifier. Is it possible to do this? That is, if the tag is anRFIDtag that is being detected by the phone, but isn't of any special type, can I access its bit vector? Thank you very much Pierre -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: RFID tag detection
I see what you mean; the RFID tags I am using are 13.56 Mhz, and the Nexus S can detect them and . If my understanding is correct, the way it happens is that when an 13.56 RFID or NFC tag is detected, a new intent is thrown with some kind of special added data and we resolve this intent to get the information out of it. I am doing the following: 1) call the resolveintent(Intent intent) function 2) Check if the action in the intent is TAG_DISCOVERED (this is always the case with my tags, maybe because they're not a type android is familiar with) 3) Then, I want to extract this UID: what should i call? intent.get ? Note: I tried Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); as isdescribed on the android website, but it returned null, probably because the tag type is unknown Thank you very much Pierre On Wed, May 18, 2011 at 2:34 AM, nemik ne...@nemik.net wrote: I don't know about a bit vector but most NFC tags (whether type A, B, Mifare 1k/Ultralight/etc) all have a UID. This is a unique identifier for the tag and what you're looking for. But the tags you use will have to be of the 13.56 MHz hi-frequency variety. You won't be able to read most older HID Prox cards for example because they operate on the 125 kHz frequency. On May 17, 5:19 pm, Pierre Yaacoub pierreyaac...@gmail.com wrote: Hello, I am trying to build an application that uses the new Android capability of detecting RFID (NFC) tags. The tags that I have are not NFC tags, that is, they are not of a special type (like URI ...). For my purposes, I do not care about parsing the tag data in a certain way (as would be the case in some NFC tags like URI or SmartText). I just need to access the bit vector that the tag sends, and use it as a unique identifier. Is it possible to do this? That is, if the tag is an RFID tag that is being detected by the phone, but isn't of any special type, can I access its bit vector? Thank you very much Pierre -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com 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 android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: RFID tag detection
Thank you very much Adam. This is indeed the way to do it, and even though I found it out just about an hour ago, I'm still very thankful to you guys. Regards On Wed, May 18, 2011 at 7:40 PM, nadam a...@anyro.se wrote: Not sure if this is what you want, but here is how you get the ID from the intent: byte[] id = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID); /Adam On 18 Maj, 00:19, Pierre Yaacoub pierreyaac...@gmail.com wrote: Hello, I am trying to build an application that uses the new Android capability of detecting RFID (NFC) tags. The tags that I have are not NFC tags, that is, they are not of a special type (like URI ...). For my purposes, I do not care about parsing the tag data in a certain way (as would be the case in some NFC tags like URI or SmartText). I just need to access the bit vector that the tag sends, and use it as a unique identifier. Is it possible to do this? That is, if the tag is an RFID tag that is being detected by the phone, but isn't of any special type, can I access its bit vector? Thank you very much Pierre -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com 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 android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
[android-developers] RFID tag detection
Hello, I am trying to build an application that uses the new Android capability of detecting RFID (NFC) tags. The tags that I have are not NFC tags, that is, they are not of a special type (like URI ...). For my purposes, I do not care about parsing the tag data in a certain way (as would be the case in some NFC tags like URI or SmartText). I just need to access the bit vector that the tag sends, and use it as a unique identifier. Is it possible to do this? That is, if the tag is an RFID tag that is being detected by the phone, but isn't of any special type, can I access its bit vector? Thank you very much Pierre -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
