I am using the USB ADBhost code at https://www.b4x.com/android/forum/threads/android-usb-host-tutorial-adbtest.11289/ as the basis of a SmartCard reader.
In B4A it is working great to find the USB device and I am able to select the correct device based on Class and Subclass. I can send APDU commands, but I am stuck getting any response.
So.. I thought I'd port it to B4J and use a Smartcard logging app to see if I could sniff out the issue.
The code seems to go over fine, but on compiling it gives the following error for the line "inter = ud.GetInterface(a)"
Why is there a mention of android in a B4J error? Does the USB library work in B4J?
The Library Manager seems to indicate it is OK
Thanks,
Kev
In B4A it is working great to find the USB device and I am able to select the correct device based on Class and Subclass. I can send APDU commands, but I am stuck getting any response.
So.. I thought I'd port it to B4J and use a Smartcard logging app to see if I could sniff out the issue.
B4X:
Sub FindSmartCardDevice As Boolean
Dim usbdevices() As UsbDevice
usbdevices = manager.GetDevices
'Iterate over devices and find the correct one
For i = 0 To usbdevices.Length - 1
Dim ud As UsbDevice
ud = usbdevices(i)
Log("USBdevices: " & ud)
'Iterate over interfaces
For a = 0 To ud.InterfaceCount - 1
Dim inter As UsbInterface
inter = ud.GetInterface(a)
Log("Class|SubClass: " & inter.InterfaceClass & "|" & inter.InterfaceSubclass)
If inter.InterfaceClass = 11 And inter.InterfaceSubclass = 0 Then
'found our device and interface
device = ud
interface = inter
'Find correct endpoints
For b = 0 To interface.EndpointCount - 1
Dim endpoint As UsbEndpoint
endpoint = interface.GetEndpoint(b)
Log("EndPoint Address: " & endpoint.Address & "|Attributes: " & endpoint.Attributes & "|Direction: " & endpoint.Direction & "|EndpointNumber: " & endpoint.EndpointNumber & "|Interval: " & endpoint.Interval & "|MaxPacketSize: " & endpoint.MaxPacketSize & "|Type: " & endpoint.Type)
If endpoint.Type = manager.USB_ENDPOINT_XFER_BULK Then
' Log("Endpoint Address: " & endpoint.Address & "|Type: " & endpoint.Type & "|Direction: " & endpoint.Direction)
If endpoint.Direction = manager.USB_DIR_IN Then
inEndpoint = endpoint
Else If endpoint.Direction = manager.USB_DIR_OUT Then
outEndpoint = endpoint
End If
End If
Next
End If
Next
Next
If device.IsInitialized = False Then Log("Smartcard device not found.")
End Sub
Java Error:
Compiling generated Java code. Error
B4J line: 112
inter = ud.GetInterface(a)
src\b4j\example\main.java:211: error: package android.hardware.usb does not exist
_inter = (anywheresoftware.b4a.objects.usb.UsbManagerWrapper.UsbInterfaceWrapper) anywheresoftware.b4a.AbsObjectWrapper.ConvertToWrapper(new anywheresoftware.b4a.objects.usb.UsbManagerWrapper.UsbInterfaceWrapper(), (android.hardware.usb.UsbInterface)(_ud.GetInterface(_a)));
^
1 errorThe Library Manager seems to indicate it is OK
Thanks,
Kev