Ready Andorid phone via the USB port and single-chip serial communication possible?

            
There is no information in this regard?
Reply:
The use JNI processing, and use the phone to call the underlying C interface USB communication.
Reply:

cited a floor birdsaction reply:

that use JNI processing, and use the phone to call the underlying C interface USB communication.

I have a tablet with this OTG an external keypad can also be used! There should also be involved in data communication of it! This is also underlying the development of it?
Reply:
Yes, but you need a USB to serial line communication (including USB to serial chip)

Tablet can work as a USB Host.
Reply:

reference to the third floor pottichu reply:

can communicate, but you need a USB to serial cable (included USB to serial chip)

Tablet can work as a USB Host.

There is no relevant information, documents or Android itself, there are similar Demo?
Reply:
This is not a Demo problem,

The first thing you're looking for a USB to serial cable,
Then there Root privileges phones,
Then Jieshang Qu, see if there is / dev/ttyUSB0, if not, it is necessary depending on the model of USB to serial chip to find the driver,
Then compile it yourself, insmod go to the phone.

Typically, if this phone / tablet is not your own development company, this kind of thing you are doing to succeed.
        

Reply:

references, 5th Floor pottichu reply:

Demo This is not a problem,

The first thing you're looking for a USB to serial cable,
Then there Root privileges phones,
Then Jieshang Qu, see if there is / dev/ttyUSB0, if not, it is necessary depending on the model of USB to serial chip to find the driver,
Then compile it yourself, insmod go to the phone.

Typically, if this phone / tablet is not your own development company, this kind of thing you are doing to succeed.

Oh Myself!