NXP advanced lib NullPointerException while reading DESFire

[arrow.pass]

I randomly get this while reading DESFire EV1 card. It leads to delay in reading card for several second. Is there a fix for the problem?

I/NXP_NFC_LIBRARY(16029): println needs a message
I/NXP_NFC_LIBRARY(16029): java.lang.NullPointerException: println needs a message
I/NXP_NFC_LIBRARY(16029): at android.util.Log.println_native(Native Method)
I/NXP_NFC_LIBRARY(16029): at android.util.Log.d(Log.java:139)
I/NXP_NFC_LIBRARY(16029): at com.nxp.nfclib.utils.NxpLogUtils.log(:758)
I/NXP_NFC_LIBRARY(16029): at com.nxp.nfclib.desfire.DESFireEV1.isCardDESFireEV1(:7052)
I/NXP_NFC_LIBRARY(16029): at com.nxp.nfclib.NxpNfcLib.ˊ(:1204)
I/NXP_NFC_LIBRARY(16029): at com.nxp.nfclib.NxpNfcLib.ˎ(:583)
I/NXP_NFC_LIBRARY(16029): at com.nxp.nfclib.NxpNfcLib.filterIntent(:530)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.gate.ArrowPassCardFactory.getCard(ArrowPassCardFactory.java:80)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.role.cardprocessor.CardProcessor$StateProcessing.(CardProcessor.java:106)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.role.cardprocessor.CardProcessor$StateStart.processEvent(CardProcessor.java:89)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.role.PaymentRole$StateReadingBalance.set(PaymentRole.java:666)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.role.PaymentRole$StateGetBalance.processEvent(PaymentRole.java:578)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.role.PasswordRole$StateNestedRole.processEvent(PasswordRole.java:141)
I/NXP_NFC_LIBRARY(16029): at com.arrowpass.checker.role.BaseRole$7.run(BaseRole.java:609)
I/NXP_NFC_LIBRARY(16029): at android.os.Handler.handleCallback(Handler.java:808)
I/NXP_NFC_LIBRARY(16029): at android.os.Handler.dispatchMessage(Handler.java:103)
I/NXP_NFC_LIBRARY(16029): at android.os.Looper.loop(Looper.java:193)
I/NXP_NFC_LIBRARY(16029): at android.app.ActivityThread.main(ActivityThread.java:5299)
I/NXP_NFC_LIBRARY(16029): at java.lang.reflect.Method.invokeNative(Native Method)
I/NXP_NFC_LIBRARY(16029): at java.lang.reflect.Method.invoke(Method.java:515)
I/NXP_NFC_LIBRARY(16029): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:825)
I/NXP_NFC_LIBRARY(16029): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:641)
I/NXP_NFC_LIBRARY(16029): at dalvik.system.NativeStart.main(Native Method)

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[mifaresdk]

Hi Arrowpass,

It seems the bug is bad using of the read method. Please check one of the detailed DESFire read/write examples of this forum.

Kind regards,
The MIFARE Team

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[arrow.pass]

It does not look as wrong usage. Other times anything works well. It is likely depends on NFC link condition.

Any way do you think it is ok to raise NullPointerException while trying to print common log message? Even in case wrong usage library shouldn't fire NullPointerException except the case when user pass null instead of some value.

In this case it is not thrown through API level. It is good thing. But it make a delay in card processing for about 2 sec. It is bad thing. After these 2 sec. it continue without errors. This delay in application response is not acceptable for our application.

That is why I ask about fix. Anyway it looks like I cannot download NXP advanced SDK anymore... The next question is when TapLinx version will be available for download?

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[mifaresdk]

Hi Arrowpass,

Did you see this post:

Trying to read DESFire EV1 Card, requires Authentication

It is working example of reading the MIFARE DESFire EV1 (without a null pointer exception).

Kind regards,
The MIFARE Team

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[arrow.pass]

Hey... Did somebody from NXP with java programming skills read my messages carefully ?
Can you escalate the problem to appropriate level?

Thanks in advance.

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[mifaresdk]

Hi Arrowpass,

I will hand over your problem to the development team, but a short error log is not sufficient to understand what is going wrong. Please tell me the call method and arguments, the Android version and the model you use.

You can use this mail address for a direct feedback: mifaresdk@nxp.com

Regards,
The TapLinx Team

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