使用APDU命令的Android NFC问题

我正在使用IsoDep Tag Tech向应用程序发送APDU命令给启用NFC的卡。

更新:所以下面看到的问题似乎与我正在使用的卡的电源要求有关,当我使用低功率要求的不同的卡时,以下症状不经常发生。

我已经明确地跟踪了文档,并成功地实现了该协议。 然而,如果我的代码无法控制的话,我遇到了NFC低级库的一些问题。

我已经实现了以下内容:

  • 待定意向的前台调度。
  • 意图有IsoDep.class和行动的技术filter:
    • ACTION_TAG_DISCOVERED
  • 一旦我从意图Extra Extra APDU命令中提取标签并处理响应

问题是我注意到了一些事情:

在Nexus S上,卡片的位置取决于成功的通信stream程,如果它不在最佳位置,我将收到一个IOExceptionexception如果因为卡片已经移动或者没有保留在RF字段而导致IOExceptions太多,我将启动看到下面的消息(见下文)我想知道是否有人看到这些问题? 在我的onResume方法中,我没有任何逻辑来防止多次调用方法的NFCAdapter实例:enableForegroundDispatch,我应该这样做。

在此先感谢您的帮助。

示例例外1

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(MyClass.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) 

示例例外2

 06-16 12:08:18.316: ERROR/MyClass(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(MyClass.java:117) 06-16 12:08:18.328: WARN/System.err(661): at myClass.onNewIntent(MyClass.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/MyClass(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 

Sameple例外3

 06-16 12:08:15.468: DEBUG/MyClass(661): Recieved a TAG 06-16 12:08:15.468: DEBUG/MyClass(661): Supported Technology of for recieve d tag: android.nfc.tech.IsoDep 06-16 12:08:15.468: DEBUG/MyClass(661): Supported Technology of for recieved tag: android.nfc.tech.NfcA 06-16 12:08:15.468: DEBUG/MyClass(661): Supported Technology of for recieved tag: android.nfc.tech.MifareClassic 06-16 12:08:15.484: ERROR/MyClass(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/MyClass(661): Failed to connect to tag 06-16 12:08:15.484: DEBUG/MyClass(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] 

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