Writing NativeScript plugin for EMDK Android

J Julian Schmidl 3 years 7 months ago
86 1 0

Hi all,
 
actually I'm trying to write a NativeScript plugin to use the native EMDK on my device (especially the hardware scanner).
I'm using the EMDK for Android v6.3. From the coding perspective (only the java code - not the GUI) I'm pretty close to this sample: Basic Scanning Tutorial using Barcode API - Zebra Technologies Techdocs
 
Unfortunately the app crashes when I'm trying to get the barcodeManager:
barcodeManager = (BarcodeManager) this.emdkManager   .getInstance(EMDKManager.FEATURE_TYPE.BARCODE);
 

 
As far as I can see the most important details from the log files are:
07-07 16:08:39.141 21367 21367 D com.symbol.emdk.EMDKServiceConnection: The EMDK Service is now connected!
07-07 16:08:39.142 20029 20029 V MDM_TASK_BASE_SERVICE: onCreate
07-07 16:08:39.145 17334 17345 D com.symbol.emdk.emdkservice.MxServiceConnection: release: The connection to the MX Service is closing...
07-07 16:08:39.146 20029 20029 V MDM_TASK_BASE_SERVICE: onCreate end
07-07 16:08:39.146 20029 20029 V MDM_TASK_BASE_SERVICE: onStartCommand, startId: 1, action:null
07-07 16:08:39.146 20029 20029 V MDM_TASK_BASE_SERVICE: onStartCommand end
07-07 16:08:39.147 20029 21455 D MDM_TASK_BASE_SERVICE: TaskBaseService handle message: SEQUENCE_INTENT
07-07 16:08:39.147 20029 21455 D MDM_TASK_BASE_SERVICE: Worker entered work method, new_task: null
07-07 16:08:39.147 20029 21455 D MDM_TASK_BASE_SERVICE: TaskBaseService loadQueue
07-07 16:08:39.148 17334 17345 D com.symbol.emdk.emdkservice.MxServiceConnection: The connection to the MX Service is closed.!
07-07 16:08:39.148 17334 17345 D SvcEMDKManager: supportedcradle is null
07-07 16:08:39.148 17334 17345 D SvcEMDKManager: supportedDiagnostic is null
07-07 16:08:39.148 17334 17345 D SvcEMDKManager: #EMDK-SVC# ProfileService::nfnUnInitialize()
07-07 16:08:39.148 17334 17345 D com.symbol.emdk.emdkservice.MxServiceConnection: MxServiceConnection constructor
07-07 16:08:39.148 17334 17345 D com.symbol.emdk.emdkservice.MxServiceConnection: Binding Mx srvice...
07-07 16:08:39.157 17334 17345 D com.symbol.emdk.emdkservice.MxServiceConnection: MX binding request sent. State: true
07-07 16:08:39.157 17334 17345 D SvcEMDKManager: getVersion - Entering
07-07 16:08:39.157 17334 17334 D com.symbol.emdk.emdkservice.MxServiceConnection: onServiceConnected: Connected to MX service...
07-07 16:08:39.157 17334 17334 D MxVersionHandler: MxVersionHandler Constructor
07-07 16:08:39.158 17334 17345 D SvcEMDKManager: getVersion - Leaving
07-07 16:08:39.158 17334 17345 D SvcEMDKManager: EMDK Version=6.3.23.623
 
07-07 16:08:39.169 21367 21367 F libc    : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x7748980 in tid 21367 (tivescript.demo)
07-07 16:08:39.179  6387  7049 W Herrevad: Invalid mccmnc
07-07 16:08:39.186  6387  7049 W Herrevad: Invalid mccmnc
07-07 16:08:39.255  6387  7431 I DpmTcmClient: RegisterTcmMonitor from: com.android.okhttp.TcmIdleTimerMonitor
07-07 16:08:39.271   552   552 F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
07-07 16:08:39.271   552   552 F DEBUG   : Build fingerprint: 'Zebra/TC56/TC56:6.0.1/01-15-01.7-MG-00/105:user/release-keys'
07-07 16:08:39.271   552   552 F DEBUG   : Revision: '0'
07-07 16:08:39.271   552   552 F DEBUG   : ABI: 'arm'
07-07 16:08:39.272   552   552 F DEBUG   : pid: 21367, tid: 21367, name: tivescript.demo  >>> org.nativescript.demo

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1 Replies

Y Yanis Dalabiras

Hi Julian,

Interesting, looking through the NativeScript create a plugin docs there are a few things I could suggest:
* Ensure you are including the jar file as 'provided' in your build.gradle, I do not suspect NativeScript will understand the compileSDKVersion of Symbol Technologies.  The default sample uses compileSDKVersion (samples-emdkforandroid-6_4/build.gradle at BarcodeSample1 · Zebra/samples-emdkforandroid-6_4 · GitHub ) but there is an example of including the jar file as provided in one of my personal projects: MxLockDown/build.gradle at master · darryncampbell/MxLockDown · GitHub  .  This is the include.gradle section of the NS plugin development guide, make sure you are not using compile.
* Ensure you have the appropriate entries in AndroidManifest.xml (uses-permission, samples-emdkforandroid-6_4/AndroidManifest.xml at BarcodeSample1 · Zebra/samples-emdkforandroid-6_4 · GitHub   and uses-library, samples-emdkforandroid-6_4/AndroidManifest.xml at BarcodeSample1 · Zebra/samples-emdkforandroid-6_4 · GitHub  )

There is nothing in the log file that to me looks like an obvious cause so hopefully either of the above two resolve the issue.

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