Android Question usb card reader

[zmrcic]

hi...I was following this example

Private jo As JavaObject
Manager= GetContext.RunMethod("getSystemService", Array("usb"))
mReader=jo.InitializeNewInstance ("com.acs.smartcard.Reader",Array As Object (Manager))

    umanager.Initialize
    Dim usbdevices() As UsbDevice
    usbdevices = umanager.GetDevices
    For i = 0 To usbdevices.Length - 1
        udevice = usbdevices(i)
    Next
    If udevice.IsInitialized = False Then Log("ADB device not found.")
    If umanager.HasPermission(udevice) = False Then
        umanager.RequestPermission(udevice)
    End If


device=mReader.RunMethod ("open",Array  (uDevice)) 'on this line I get error

Caused by: java.lang.IllegalArgumentException: The device is not supported.

in documentation:
"
reader.open(device)

will throw IllegalArgumentException if the UsbDevice object is not supported or it cannot be opened due to communication error. "

this is not the case since I read card from android APDU sender, windows apps....

 

[agraham]

this is not the case since I read card from android APDU sender, windows apps....

What does this mean?

 

[zmrcic]

it means that other apps are reading the card....
my guess is that error is in part initializing manager or reader...