Android Question [B4X] Barcode Reader problem

[cwt]

I am implementing this barcode reader in my Android app and have a problem with different devices.

The problem occurs in this sub of the barcode reader code:

Private Sub CreateDetector (Codes As List)
    Dim ctxt As JavaObject
    ctxt.InitializeContext
    Dim builder As JavaObject
    builder.InitializeNewInstance("com/google/android/gms/vision/barcode/BarcodeDetector.Builder".Replace("/", "."), Array(ctxt))
    Dim barcodeClass As String = "com/google/android/gms/vision/barcode/Barcode".Replace("/", ".")
    Dim barcodeStatic As JavaObject
    barcodeStatic.InitializeStatic(barcodeClass)
    Dim format As Int
    For Each formatName As String In Codes
        format = Bit.Or(format, barcodeStatic.GetField(formatName))
    Next
    builder.RunMethod("setBarcodeFormats", Array(format))
    detector = builder.RunMethod("build", Null)
    Dim operational As Boolean = detector.RunMethod("isOperational", Null)
    If operational = False Then
        toast.Show("Failed to create detector")
    End If
    btnStartStop.Enabled = operational
End Sub

The code works fine on one of my test phones, a Samsung Galaxy S10 with Android 11.0 - but I get "Failed to create detector" on another test phone, Samsung Galaxy S4 with Android 5.01.

Is this an Android version problem or possibly something else? Any fix?

 

[agraham]

I don't think these APIs were available with Android 5 but frustratingly I can't at the moment find when they were introduced.

 

[agraham]

I'll have to bow out of this one and hope someone more knowledgable can comment. I think the APIs are part of the Google Play services client library and should be available, as long as the device is up to date, on Android 4.1 or later.

 

[Erel]

Worth testing it again after a few minutes. The device will try to download the missing components if they are not already available.

 

[cwt]

What would I need to have in the manifest, if anything, for this to work?

 

[Erel]

Everything needed is included in the example: https://www.b4x.com/android/forum/threads/b4x-b4xpages-barcode-reader.120417/