Hi, I am working on an Application using the IsoDep Tag Tech to issue APDU commands to an NFC enabled card.
I have followed the documentation explicitly and have a successful managed to implement the protocol. However with mixed success I am experiencing some issues with the NFC lower level libraries beyond the control of my code. I have implemented the following: 1. Foreground dispatching of a Pending Intent. The intent has a tech filter for IsoDep.class and action: ACTION_TAG_DISCOVERED 2. Once the I then extract the Tag from the Intent Extra 3. Issue APDU commands and process the responses The issue is that I have noticed a couple of things: 1. On the Nexus S the position of the card is dependent on a successful communication flow, if it is not in the sweet spot I will receive an IOException 2. If I get too many IOExceptions because the card has moved or not remained in the RF field I start to see the following excpetions (see below) I was wondering if anyone else had seen these issues? In my onResume method I don't have any logic to prevent multiple calls to the NFCAdapter instance of the method: enableForegroundDispatch, should I be doing this. Thanks in advance for any help. Exceptions: 06-16 12:08:43.351: ERROR/NFC(661): NFC service dead - attempting to recover 06-16 12:08:43.351: ERROR/NFC(661): android.os.DeadObjectException 06-16 12:08:43.351: ERROR/NFC(661): at android.os.BinderProxy.transact(Native Method) 06-16 12:08:43.351: ERROR/NFC(661): at android.nfc.INfcAdapter$Stub$Proxy.enableForegroundDispatch(INfcAdapter.java:528) 06-16 12:08:43.351: ERROR/NFC(661): at android.nfc.NfcAdapter.enableForegroundDispatch(NfcAdapter.java:494) 06-16 12:08:43.351: ERROR/NFC(661): at myClass.onResume(ConfirmPaymentScreen.java:406) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1150) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.Activity.performResume(Activity.java:3832) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2110) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2135) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1668) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 06-16 12:08:43.351: ERROR/NFC(661): at android.os.Handler.dispatchMessage(Handler.java:99) 06-16 12:08:43.351: ERROR/NFC(661): at android.os.Looper.loop(Looper.java:130) 06-16 12:08:43.351: ERROR/NFC(661): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-16 12:08:43.351: ERROR/NFC(661): at java.lang.reflect.Method.invokeNative(Native Method) 06-16 12:08:43.351: ERROR/NFC(661): at java.lang.reflect.Method.invoke(Method.java:507) 06-16 12:08:43.351: ERROR/NFC(661): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-16 12:08:43.351: ERROR/NFC(661): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-16 12:08:43.351: ERROR/NFC(661): at dalvik.system.NativeStart.main(Native Method) 06-16 12:08:18.316: ERROR/ConfirmPaymentScreen(661): IOException in APDU commands: transceive failed 06-16 12:08:18.316: WARN/System.err(661): java.io.IOException: transceive failed 06-16 12:08:18.324: WARN/System.err(661): at android.nfc.tech.BasicTagTechnology.transceive(BasicTagTechnology.java:144) 06-16 12:08:18.324: WARN/System.err(661): at android.nfc.tech.IsoDep.transceive(IsoDep.java:159) 06-16 12:08:18.328: WARN/System.err(661): at myClass.handleTagRead(ConfirmPaymentScreen.java:117) 06-16 12:08:18.328: WARN/System.err(661): at myClass.onNewIntent(ConfirmPaymentScreen.java:84) 06-16 12:08:18.332: WARN/System.err(661): at android.app.Instrumentation.callActivityOnNewIntent(Instrumentation.java:1119) 06-16 12:08:18.332: WARN/System.err(661): at android.app.ActivityThread.deliverNewIntents(ActivityThread.java:1722) 06-16 12:08:18.335: WARN/System.err(661): at android.app.ActivityThread.performNewIntents(ActivityThread.java:1734) 06-16 12:08:18.335: WARN/System.err(661): at android.app.ActivityThread.handleNewIntent(ActivityThread.java:1742) 06-16 12:08:18.339: WARN/System.err(661): at android.app.ActivityThread.access$2300(ActivityThread.java:117) 06-16 12:08:18.343: WARN/System.err(661): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:978) 06-16 12:08:18.343: WARN/System.err(661): at android.os.Handler.dispatchMessage(Handler.java:99) 06-16 12:08:18.347: WARN/System.err(661): at android.os.Looper.loop(Looper.java:130) 06-16 12:08:18.347: WARN/System.err(661): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-16 12:08:18.351: WARN/System.err(661): at java.lang.reflect.Method.invokeNative(Native Method) 06-16 12:08:18.351: WARN/System.err(661): at java.lang.reflect.Method.invoke(Method.java:507) 06-16 12:08:18.355: WARN/System.err(661): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-16 12:08:18.355: WARN/System.err(661): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-16 12:08:18.359: WARN/System.err(661): at dalvik.system.NativeStart.main(Native Method) 06-16 12:08:18.359: DEBUG/ConfirmPaymentScreen(661): Setting up for ForegroundDispatch for NFC ISO DEP 06-16 12:08:18.492: DEBUG/NativeNfcTag(871): Tag lost, restarting polling loop 06-16 12:08:19.269: WARN/NfcService(871): Failed to connect to tag 06-16 12:08:23.980: ERROR/NFC JNI(871): phLibNfc_RemoteDev_Connect(RW) returned 0x00ff[NFCSTATUS_FAILED] 06-16 12:08:23.980: WARN/NfcService(871): Failed to connect to tag 06-16 12:08:23.980: ERROR/NFC JNI(871): doDisconnect() - Target already disconnected 06-16 12:08:15.468: DEBUG/PurchaseDetailsScreen(661): Recieved a TAG 06-16 12:08:15.468: DEBUG/ConfirmPaymentScreen(661): Supported Technology of for recieved tag: android.nfc.tech.IsoDep 06-16 12:08:15.468: DEBUG/ConfirmPaymentScreen(661): Supported Technology of for recieved tag: android.nfc.tech.NfcA 06-16 12:08:15.468: DEBUG/ConfirmPaymentScreen(661): Supported Technology of for recieved tag: android.nfc.tech.MifareClassic 06-16 12:08:15.484: ERROR/ConfirmPaymentScreen(661): Failed to connect to aTag Reason: null 06-16 12:08:15.484: WARN/System.err(661): java.io.IOException 06-16 12:08:15.484: WARN/System.err(661): at android.nfc.tech.BasicTagTechnology.connect(BasicTagTechnology.java:81) 06-16 12:08:15.484: WARN/System.err(661): at android.nfc.tech.IsoDep.connect(IsoDep.java:39) 06-16 12:08:15.484: WARN/System.err(661): at myClass.handleTagRead(ConfirmPaymentScreen.java:107) 06-16 12:08:15.484: WARN/System.err(661): at myClass.onNewIntent(ConfirmPaymentScreen.java:84) 06-16 12:08:15.484: WARN/System.err(661): at android.app.Instrumentation.callActivityOnNewIntent(Instrumentation.java:1119) 06-16 12:08:15.484: WARN/System.err(661): at android.app.ActivityThread.deliverNewIntents(ActivityThread.java:1722) 06-16 12:08:15.484: WARN/System.err(661): at android.app.ActivityThread.performNewIntents(ActivityThread.java:1734) 06-16 12:08:15.484: WARN/System.err(661): at android.app.ActivityThread.handleNewIntent(ActivityThread.java:1742) 06-16 12:08:15.484: WARN/System.err(661): at android.app.ActivityThread.access$2300(ActivityThread.java:117) 06-16 12:08:15.484: WARN/System.err(661): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:978) 06-16 12:08:15.484: WARN/System.err(661): at android.os.Handler.dispatchMessage(Handler.java:99) 06-16 12:08:15.484: WARN/System.err(661): at android.os.Looper.loop(Looper.java:130) 06-16 12:08:15.484: WARN/System.err(661): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-16 12:08:15.484: WARN/System.err(661): at java.lang.reflect.Method.invokeNative(Native Method) 06-16 12:08:15.484: WARN/System.err(661): at java.lang.reflect.Method.invoke(Method.java:507) 06-16 12:08:15.484: WARN/System.err(661): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-16 12:08:15.484: WARN/System.err(661): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-16 12:08:15.484: WARN/System.err(661): at dalvik.system.NativeStart.main(Native Method) 06-16 12:08:15.484: DEBUG/ConfirmPaymentScreen(661): Failed to connect to tag 06-16 12:08:15.484: DEBUG/ConfirmPaymentScreen(661): Setting up for ForegroundDispatch for NFC ISO DEP 06-16 12:08:15.609: ERROR/NFC JNI(871): phLibNfc_RemoteDev_CheckPresence() returned 0x0095[NFCSTATUS_INVALID_HANDLE] 06-16 12:08:15.609: DEBUG/NativeNfcTag(871): Tag lost, restarting polling loop 06-16 12:08:15.609: ERROR/NFC JNI(871): phLibNfc_RemoteDev_Disconnect(294f58) returned 0x0095[NFCSTATUS_INVALID_HANDLE] -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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