Android Question How to obtain Serial Number from USB device

You can get this value with JavaObject. However it is only available in Android 5+:

Android 5?, That leaves a lot of devices on the floor. Any chance I can modify the Library?

littlerunningdeer said:

Any chance I can modify the Library?

Click to expand...

Put Android 5+ in the background.

public String getSerialNumber () Added in API level 21

Click to expand...

Reference

getSerialNumber is added to Android in Api 21 (5)

While the USBDetails program was very useful in getting started, a bug in it caused me to discount the value of the raw descriptors.
So now the applicable code to obtain the serial number is:

Dim ud As UsbDevice
ud = devices(device)
Dim connection As UsbDeviceConnection
connection = Connect(0, 0, interfaces)
Dim Obj1 As Reflector
Obj1.Target = connection
Obj1.Target = Obj1.GetField("connection")

Dim buffer(128) As Byte ' maximum packet size
Dim datalen, idx As Int
rawdescs = Obj1.RunMethod("getRawDescriptors")idx = rawdescs(16)
datalen = connection.ControlTransfer(128, 6, 0x0300 + idx, 0, buffer, buffer.Length, 100)
'buffer(0..datalen) contains string descriptor