[Asus  Eee Pad Transformer Prime] Thenetstriker:
I tried to compile my own Kernel with video 4 linux enabled and the app still doesn't work on my Samsung Galaxy S2. But the device shows up on android. Using the app "USB Device Info" I was able to get the following information about my Logitech webcam USB interfaces, but I don't have the knowledge on how to communicate with USB devices over these interfaces. I think someone who has this knowledge could write an application using the USB Host feature from Android 4.0 to show the webcam picture even without root access.

Device Info
Device Path: /dev/bus/usb/002/002
Device Class: Miscellaneous (0xef)
Vendor ID: 046d
Vendor Name: Logitech, Inc.
Product ID: 07d2
Product Name: not in db

Interfaces
Interface #0
Class: Video Device (0xe)
Endpoint: #0
Address : 135 (10000111)
Number : 7
Direction : Inbound (0x80)
Type : Intrrupt (0x3)
Poll Interval : 8
Max Packet Size: 16
Attributes : 000000011
Interface #1
Class: Video Device (0xe)
Endpoints: none
Interface #2
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 192
Attributes : 0000000101
Interface #3
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 384
Attributes : 0000000101
Interface #4
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 512
Attributes : 0000000101
Interface #5
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 640
Attributes : 0000000101
Interface #6
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 800
Attributes : 0000000101
Interface #7
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 944
Attributes : 0000000101
Interface #8
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 2688
Attributes : 0000000101
Interface #9
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 2848
Attributes : 0000000101
Interface #10
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 3040
Attributes : 0000000101
Interface #11
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 4992
Attributes : 0000000101
Interface #12
Class: Video Device (0xe)
Endpoint: #0
Address : 129 (10000001)
Number : 1
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 1
Max Packet Size: 5116
Attributes : 0000000101
Interface #13
Class: Audio Device (0x1)
Endpoints: none
Interface #14
Class: Audio Device (0x1)
Endpoints: none
Interface #15
Class: Audio Device (0x1)
Endpoint: #0
Address : 134 (10000110)
Number : 6
Direction : Inbound (0x80)
Type : Isochronous (0x1)
Poll Interval : 4
Max Packet Size: 68
Attributes : 0000000101