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POAndroid NFC not working with ICS
 

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  1. POAndroid NFC not working with ICS
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    <p>yesterday I watched Google IO Talk about NFC and today I'm trying to do some fun things with it.</p> <p>At the moment I've a Galaxy Nexus (ICS 4.0.2) and Nexus S (ICS 4.0.3). I've installed the sample application of that talk: <a href="http://nfc.android.com/StickyNotes.zip" rel="nofollow">http://nfc.android.com/StickyNotes.zip</a></p> <p>I'm also following this how-to in order to understand the flow with some comments: <a href="http://www.jessechen.net/blog/how-to-nfc-on-the-android-platform/" rel="nofollow">http://www.jessechen.net/blog/how-to-nfc-on-the-android-platform/</a></p> <p>What I'm trying to do is to send in p2p way a message from a phone to another and change the edittext content (like the example has to do!).</p> <p>I think that the NFC Message is going out but the other phone is not grabbing it... Someone know why?</p> <p>This is the logcat from one of the phone (when those 2 phones is contacting each other):</p> <pre><code>03-03 15:37:47.842: W/NFC-LLC(446): bad LLC length byte d0 03-03 15:37:47.842: W/NFC-LLC(446): bad LLC length byte a6 03-03 15:37:47.842: W/NFC-LLC(446): bad LLC length byte 42 03-03 15:37:47.842: W/NFC-LLC(446): bad LLC length byte 1 03-03 15:37:47.842: W/NFC-LLC(446): bad LLC length byte fc 03-03 15:37:47.842: W/NFC-LLC(446): bad LLC length byte c1 03-03 15:37:48.264: D/NFC JNI(446): Discovered P2P Target 03-03 15:37:48.264: D/NfcService(446): LLCP Activation message 03-03 15:37:48.264: D/NfcService(446): NativeP2pDevice.MODE_P2P_TARGET 03-03 15:37:48.296: I/NFC JNI(446): LLCP Link activated (LTO=150, MIU=128, OPTION=0x00, WKS=0x01) 03-03 15:37:48.296: D/NfcService(446): Initiator Activate LLCP OK 03-03 15:37:48.296: I/NfcP2pLinkManager(446): LLCP activated 03-03 15:37:48.296: D/NfcP2pLinkManager(446): onP2pInRange() 03-03 15:37:48.467: D/dalvikvm(446): GC_FOR_ALLOC freed 3192K, 18% free 17750K/21575K, paused 19ms 03-03 15:37:48.467: I/dalvikvm-heap(446): Grow heap (frag case) to 20.515MB for 3265936-byte allocation 03-03 15:37:48.514: D/dalvikvm(446): GC_CONCURRENT freed &lt;1K, 3% free 20939K/21575K, paused 4ms+3ms 03-03 15:37:51.264: I/NFC JNI(446): LLCP Link deactivated 03-03 15:37:51.264: D/NfcService(446): LLCP Link Deactivated message. Restart polling loop. 03-03 15:37:51.264: D/NfcService(446): disconnecting from target 03-03 15:37:51.264: I/NfcP2pLinkManager(446): LLCP deactivated. 03-03 15:37:52.022: D/NfcP2pLinkManager(446): Debounce timeout 03-03 15:37:52.022: D/NfcP2pLinkManager(446): onP2pOutOfRange() </code></pre> <p><strong>UPDATE</strong></p> <p>I've made some changes to default Sticky Notes code in order to upgrade it to support ICS NFC API. Infact if you go to the documentation you can see this: <a href="http://developer.android.com/reference/android/nfc/NfcAdapter.html#enableForegroundNdefPush%28android.app.Activity,%20android.nfc.NdefMessage%29" rel="nofollow">http://developer.android.com/reference/android/nfc/NfcAdapter.html#enableForegroundNdefPush%28android.app.Activity,%20android.nfc.NdefMessage%29</a></p> <p>This method is deprecated. use setNdefPushMessage(NdefMessage, Activity, Activity...) instead </p> <blockquote> <p>Strongly recommend to use the new setNdefPushMessage(NdefMessage, Activity, Activity...) instead: it automatically hooks into your activity life-cycle, so you do not need to call enable/disable in your onResume/onPause.</p> </blockquote> <p>Also I read this: For NDEF push to function properly the other NFC device <strong>must support</strong> either NFC Forum's <strong>SNEP</strong> (Simple Ndef Exchange Protocol), or Android's "<strong>com.android.npp</strong>" (Ndef Push Protocol). This was optional on Gingerbread level Android NFC devices, but <strong>SNEP is mandatory on Ice-Cream-Sandwich and beyond</strong>.</p> <p>I do not understand if using setNdefPushMessage it will automatically support SNEP protocol of if I have to make other changes. At the moment as I said I'm using a Galaxy Nexus (4.0.2) and a Nexus S (4.0.3) and I've no other kind of devices to makes tests. </p> <p>I've also implemented the onNdefPushComplete for the adapter that is sending messages and for what I can see its never called.. I don't understand if this is a problem about APIS, Devices, or my code. So what I don't understand is: if everything is working fine, when I change the text of the Sticky Note edit text and I link the 2 devices with NFC, the text will be sended to the other device? Is this the example?</p> <p>The really strange thing is that I cannot find examples about how to do NFC with ICS and the official documentation doesn't explain it so well...</p> <p>Someone know how to solve?</p>
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