usb - Bidirectional communication between keyboard and android device (AOA) -

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i want create android application can communicate keyboard (hid). firstly, try communicate keyboard via usb host seems keyboard doesn't appear on usbmanager.getdevicelist().

i have read aoa. problem don't understand how can set protocol. have understood android device should communicate accessory don't understand if standard keyboard accessory or if have modify keyboard. in second case, how can ? want plug keyboard usb directly on android device.

i have tried example of application using accessory musbmanager.getaccessorylist() return null. how can know model , manufacturer set on usb accessory filter ?

thank help.

i have worked on external keyboard integration android device. noticed keyboard not recognize device, lenevo , logitech keyboard can detectable. if looking code see link.


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