Barcode scanner crashes on Android with live video activated

[cjohn001]

Hello together,
I am trying to use the Barcode scanner with live video capture. On IOS the barcode scanner is running as expected. On an android device (Android 8.0) and also on an emulator (Android 9.0) the scanner fails with the same error:

Stacktrace from device:

System.err: An uncaught Exception occurred on "main" thread.
System.err: Calling js method onPreviewFrame failed
System.err: TypeError: Cannot read property 'firebase' of undefined
System.err: 
System.err: StackTrace:
System.err: push.../node_modules/nativescript-plugin-firebase/mlkit/barcodescanning/index.js.MLKitBarcodeScanner.preProcessImage(file: node_modules/nativescript-plugin-firebase/mlkit/barcodescanning/index.android.js:97:0)
System.err:     at onPreviewFrame(file: node_modules/nativescript-plugin-firebase/mlkit/mlkit-cameraview.android.js:168:0)
System.err:     at com.tns.Runtime.callJSMethodNative(Native Method)
System.err:     at com.tns.Runtime.dispatchCallJSMethodNative(Runtime.java:1286)
System.err:     at com.tns.Runtime.callJSMethodImpl(Runtime.java:1173)
System.err:     at com.tns.Runtime.callJSMethod(Runtime.java:1160)
System.err:     at com.tns.Runtime.callJSMethod(Runtime.java:1138)
System.err:     at com.tns.Runtime.callJSMethod(Runtime.java:1134)
System.err:     at com.tns.gen.android.hardware.Camera_PreviewCallback.onPreviewFrame(Camera_PreviewCallback.java:20)
System.err:     at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1124)
System.err:     at android.os.Handler.dispatchMessage(Handler.java:105)
System.err:     at android.os.Looper.loop(Looper.java:164)
System.err:     at android.app.ActivityThread.main(ActivityThread.java:6944)
System.err:     at java.lang.reflect.Method.invoke(Native Method)
System.err:     at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

Stacktrace from Emulator:

System.err: An uncaught Exception occurred on "main" thread.
System.err: Calling js method onPreviewFrame failed
System.err: TypeError: Cannot read property 'firebase' of undefined
System.err: 
System.err: StackTrace:
System.err: push.../node_modules/nativescript-plugin-firebase/mlkit/barcodescanning/index.js.MLKitBarcodeScanner.preProcessImage(file: node_modules/nativescript-plugin-firebase/mlkit/barcodescanning/index.android.js:97:0)
System.err:     at onPreviewFrame(file: node_modules/nativescript-plugin-firebase/mlkit/mlkit-cameraview.android.js:168:0)
System.err:     at com.tns.Runtime.callJSMethodNative(Native Method)
System.err:     at com.tns.Runtime.dispatchCallJSMethodNative(Runtime.java:1286)
System.err:     at com.tns.Runtime.callJSMethodImpl(Runtime.java:1173)
System.err:     at com.tns.Runtime.callJSMethod(Runtime.java:1160)
System.err:     at com.tns.Runtime.callJSMethod(Runtime.java:1138)
System.err:     at com.tns.Runtime.callJSMethod(Runtime.java:1134)
System.err:     at com.tns.gen.android.hardware.Camera_PreviewCallback.onPreviewFrame(Camera_PreviewCallback.java:20)
System.err:     at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1209)
System.err:     at android.os.Handler.dispatchMessage(Handler.java:106)
System.err:     at android.os.Looper.loop(Looper.java:193)
System.err:     at android.app.ActivityThread.main(ActivityThread.java:6669)
System.err:     at java.lang.reflect.Method.invoke(Native Method)
System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Has someone an idea what is going wrong here or how I can work arround the issue? Thanks for your help.

[SudhakarPunniyakotti]

Same error
System.err: An uncaught Exception occurred on "main" thread.
System.err: Unable to create application com.tns.NativeScriptApplication: com.tns.NativeScriptException: Error calling module function
System.err: TypeError: Cannot read property 'tasks' of undefined
System.err: File: (file:///node_modules/nativescript-plugin-firebase/mlkit/barcodescanning/index.js:7:0)
System.err:

My versions

"tns-android": {
"version": "6.2.0"
}
and "nativescript-plugin-firebase": "^10.5.2",

Any help will be highly appreciated, thank you ...

[cjohn001]

@sudhakar,
Hello, it seems like the error is related to the android simulator which provides a kind of virtual camera in which you can setup a virtual scene to capture an image. The first time this simulation is loaded there seems to not exist an image preset. This seems to be responsible for the crash. Maybe use a different app to once start the simulation, The issue stopped appearing to me after this even if I am using new simulator images.

Best regards,
Christoph

[zalesak]

As a quick workaround drop support for inverse code scanning.
<MLKitBarcodeScanner ... supportInverseBarcodes="false" ...

[zalesak]

@EddyVerbruggen can you help here? It seems that call for java function doesn`t work..

[zalesak]

So gyus, i found it out.

Just rename

node_modules@nativescript\firebase\platforms\android\nativescript-firebase-mlkit-helper.jar-disabled

to

node_modules@nativescript\firebase\platforms\android\nativescript-firebase-mlkit-helper.jar

I`ll create PR to solve this.