带有APDU命令的Android NFC问题

Question

我正在使用IsoDep Tag Tech处理应用程序,以向启用NFC的卡发出APDU命令.

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,当我使用具有较低功率要求的不同卡时,下面的症状不会经常发生.

我明确地遵循了文档,并成功地实现了协议.然而,由于混合成功,我遇到了一些超出我的代码控制范围的NFC低级库的问题.

我已经实现了以下内容:

• 待定意图的前台调度.
• 意图有一个用于IsoDep.class和动作的技术过滤器:
  • ACTION_TAG_DISCOVERED
• 然后,I然后从Intent Extra Issue APDU命令中提取Tag并处理响应

问题是我注意到了一些事情:

在Nexus S上,卡的位置取决于成功的通信流程,如果它不在最佳位置,我将收到IOException如果由于卡已移动​​或未保留在RF字段中而得到太多IOExceptions,我开始看到以下的消息(见下文)我想知道是否有其他人看到过这些问题？在我的onResume方法中,我没有任何逻辑来阻止多次调用方法的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]

Answer 1

所以我知道是什么原因造成的，我试图读取的一些 RFID 标签的功耗要求高于手机的功耗要求。令人不安的是，如果手机放在不好的地方太久，手机就会翻倒……