Android SDK - Null Pointer Exception by setting regulatory config

Android SDK - Null Pointer Exception by setting regulatory config // Expert user has replied. A Andrey Sedelnikov 2 years 8 months ago 195 2 0 HI, I am trying to connect to MC3300 reader using Android SDK (2.0.1.44). First connection fails because of "not configured region". Ok, I set region exactly with the code snippet as recommended here: https://techdocs.zebra.com/dcs/rfid/android/2-15/guide/regulatory/ But I get the exception as below on the last line. What am I missing? Regards java.lang.NullPointerException: Attempt to get length of null array at com.zebra.rfid.api3.l1.b(Unknown Source:95) at com.zebra.rfid.api3.l.b(Unknown Source:2) at com.zebra.rfid.api3.k.b(Unknown Source:0) at com.zebra.rfid.api3.o.b(Unknown Source:2) at com.zebra.rfid.api3.Config.setRegulatoryConfig(Unknown Source:4)

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2 Replies

A Andrey Sedelnikov 2 years 8 months ago

After some empirical testing, I have figured out that regionInfo.getSupportedChannels() returns the null instead of array, which is what causes SDK to fail.

Ok, I am overriding the list and passing the empty array to the enabled channels:

regulatoryConfig.setEnabledChannels(new String[0]);

But the reconnect attempt fails at the same message:

OperationFailureException Command Not Allowed- Region Not Set

J James Swinton-Bland 2 years 8 months ago

Hi,

I think you'll need to use the

regulatoryConfig.setRegion(regionInfo.getRegionCode());

API first, before trying to set the enabled channels - see here for more info: https://techdocs.zebra.com/dcs/rfid/android/2-15/guide/regulatory/