B4A Library [class] Google Code Scanner - no permission, very simple to use, barcode scanning

This solution is based on ML Kit (https://developers.google.com/ml-kit/vision/barcode-scanning/code-scanner).

Instructions:
1. Add to main module:

#AdditionalJar: com.google.android.gms:play-services-code-scanner
#MultiDex: True

2. Add to manifest editor:

CreateResourceFromFile(Macro, FirebaseAnalytics.GooglePlayBase) 'add if not already there

'******* google code scanner
AddApplicationText(
<meta-data
      android:name="com.google.mlkit.vision.DEPENDENCIES"
      android:value="barcode_ui"/>
 <activity
            android:name="com.google.mlkit.vision.codescanner.internal.GmsBarcodeScanningDelegateActivity"
            android:exported="false"
            android:screenOrientation="portrait"
           >
  </activity>
)
'*****************

'*********  ML kit **********
AddApplicationText(
 <activity
            android:name="com.google.mlkit.vision.documentscanner.internal.GmsDocumentScanningDelegateActivity"
            android:exported="false"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"
             >
        </activity>
         <provider
            android:name="com.google.mlkit.common.internal.MlKitInitProvider"
            android:authorities="${applicationId}.mlkitinitprovider"
            android:exported="false"
            android:initOrder="99" />

        <service
            android:name="com.google.mlkit.common.internal.MlKitComponentDiscoveryService"
            android:directBootAware="true"
            android:exported="false"
             >
            <meta-data
                android:name="com.google.firebase.components:com.google.mlkit.common.internal.CommonComponentRegistrar"
                android:value="com.google.firebase.components.ComponentRegistrar" />
        </service>
)
'******************************

Usage:

Private Sub Button1_Click
    Dim formats As List = Array(Scanner.FORMAT_ALL_FORMATS) 'For better performance pass the specific formats needed.
    Wait For (Scanner.Scan(formats)) Complete (Result As ScannerResult)
    If Result.Success Then
        Log(Result.Value)
    End If
End Sub

See attached project.

 

[Mark Stuart]

Put a button on the layout and pasted the above code into its click function.
Changed the "formats" to Scanner.FORMAT_CODE_128

Ran the app successfully to the tablet and the google scan layout appeared with the camera and a rounded color corner square appeared also.

Put the camera over a barcode and waited. The scanner layout zoomed in and out with no reporting/logging to the Logs.

Pressed on the upper left X button and the app closed with the following error lines in the IDE:

Logger connected to:  samsung SM-T380
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
** Activity (main) Resume **
Back in B4A : Modules are present on the device
Error occurred on line: 47 (GoogleCodeScanner)
java.lang.NullPointerException: Attempt to read from field 'anywheresoftware.b4a.BA$SharedProcessBA anywheresoftware.b4a.BA.sharedProcessBA' on a null object reference
    at anywheresoftware.b4a.B4AClass$ImplB4AClass.getActivityBA(B4AClass.java:37)
    at com.mfs.barcodescanner_demo.googlecodescanner$ResumableSub_Scan.resume(googlecodescanner.java:330)
    at com.mfs.barcodescanner_demo.googlecodescanner._scan(googlecodescanner.java:113)
    at com.mfs.barcodescanner_demo.main$ResumableSub_btnScan_Click.resume(main.java:450)
    at com.mfs.barcodescanner_demo.main._btnscan_click(main.java:422)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:157)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:205)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
    at android.view.View.performClick(View.java:7357)
    at android.widget.TextView.performClick(TextView.java:14263)
    at android.view.View.performClickInternal(View.java:7323)
    at android.view.View.access$3200(View.java:849)
    at android.view.View$PerformClick.run(View.java:27884)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:216)
    at android.app.ActivityThread.main(ActivityThread.java:7266)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
** Activity (main) Pause, UserClosed = false **

What am I doing wrong?

 

[Magma]

Please attach your project... and I think tomorrow I will answer to you... I m out for work

 

[Mark Stuart]

Thanx for checking it out.
I've attached my app...