nstudio / nstudio/nativescript-plugins

Error when using BarcodeScannerView Tag in NativeScript Core

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Dominant language
TypeScript
Stars
55
Forks
42
Avg merge
49m
Merged PRs (30d)
1

Description

I have an error @nstudio/nativescript-barcodescanner plugin when using BarcodeScannerView Tag

Error
An uncaught Exception occurred on "main" thread.
Unable to start activity ComponentInfo{org.nativescript.app/com.tns.NativeScriptActivity}: com.tns.NativeScriptException: Calling js method onCreate failed
Error: Building UI from XML. @app-root.xml:1:1
 > Building UI from XML. @main-page.xml:7:9
   > Module '@nstudio/nativescript-barcodescanner' not found for element '@nstudio/nativescript-barcodescanner:BarcodeScannerView'.
   > instanceType is not a constructor

StackTrace:
(file:///data/data/org.nativescript.app/files/app/vendor.js:17130:17)
	at (file:///data/data/org.nativescript.app/files/app/vendor.js:17108:36)
	at (file:///data/data/org.nativescript.app/files/app/vendor.js:48804:13)
	at EasySAXParser.parse(file:///data/data/org.nativescript.app/files/app/vendor.js:12836:23)
	at parse(file:///data/data/org.nativescript.app/files/app/vendor.js:48847:22)
	at parse(file:///data/data/org.nativescript.app/files/app/vendor.js:17117:31)
	at parseInternal(file:///data/data/org.nativescript.app/files/app/vendor.js:17052:15)
	at loadInternal(file:///data/data/org.nativescript.app/files/app/vendor.js:16964:27)
	at createViewFromEntry(file:///data/data/org.nativescript.app/files/app/vendor.js:16903:45)
	at createRootView(file:///data/data/org.nativescript.app/files/app/vendor.js:2295:77)
	at setActivityContent(file:///data/data/org.nativescript.app/files/app/vendor.js:25888:74)
	at onCreate(file:///data/data/org.nativescript.app/files/app/vendor.js:25717:14)
	at onCreate(file:///data/data/org.nativescript.app/files/app/vendor.js:25568:29)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3477)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3641)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2112)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:223)
	at android.app.ActivityThread.main(ActivityThread.java:7743)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: com.tns.NativeScriptException: Calling js method onCreate failed
Error: Building UI from XML. @app-root.xml:1:1
 > Building UI from XML. @main-page.xml:7:9
   > Module '@nstudio/nativescript-barcodescanner' not found for element '@nstudio/nativescript-barcodescanner:BarcodeScannerView'.
   > instanceType is not a constructor
	at com.tns.Runtime.callJSMethodNative(Native Method)
	at com.tns.Runtime.dispatchCallJSMethodNative(Runtime.java:1302)
	at com.tns.Runtime.callJSMethodImpl(Runtime.java:1188)
	at com.tns.Runtime.callJSMethod(Runtime.java:1175)
	at com.tns.Runtime.callJSMethod(Runtime.java:1153)
	at com.tns.Runtime.callJSMethod(Runtime.java:1149)
	at com.tns.NativeScriptActivity.onCreate(NativeScriptActivity.java:57)
	at android.app.Activity.performCreate(Activity.java:8038)
	at android.app.Activity.performCreate(Activity.java:8022)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1321)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3450)
	... 11 more
Dependencies
"@nativescript/core": "~8.9.0"
"@nativescript/android": "8.9.1"
"@nstudio/nativescript-barcodescanner": "^5.0.1"
XML Code
<Page 
    xmlns="http://schemas.nativescript.org/tns.xsd" 
    navigatingTo="onNavigatingTo" 
    xmlns:Barcode="@nstudio/nativescript-barcodescanner">
    <ActionBar title="My App" icon="" />
    <StackLayout class="p-4">
        <Barcode:BarcodeScannerView
            class="scanner-round"
            formats="QR_CODE, EAN_13"
            beepOnScan="true"
            reportDuplicates="true"
            preferFrontCamera="false"
            pause="pause"
            scanResult="onScanResult" />
        <Button text="Scan Barcode" tap="scanNow" class="-primary" />
    </StackLayout>
</Page>
TS Code
import { Observable } from "@nativescript/core";

var context = new Observable();

export function onNavigatingTo(args) {
  const page = args.object;

  page.bindingContext = context;
}

export function pause(args) {
  console.dir(args);
}

export function onScanResult(args) {
  console.dir(args);
}

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the launch failure with the listed @nativescript/core, @nativescript/android, and @nstudio/nativescript-barcodescanner dependencies and the XML BarcodeScannerView declaration. Compare the XML namespace and component loading behavior with the plugin's supported usage. Done means the app launches and BarcodeScannerView is constructed without the reported module or constructor error.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, typescript
Domain
mobile-dev
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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