Connecting to a Usb peripheral

问题

It looks like the UsbManager is gone in the build. How do we communicate with usb peripherals now?

Things like usb->serial etc using https://github.com/mik3y/usb-serial-for-android

回答1:

Currently the Peripheral HAL doesn't recognize usbserial based UART peripherals.

But if your usbserial device (ex: Arduino) exposes individual UART TX RX pins, you can communicate with it using the UART Peripheral API.

Caveat:

• Don't forget to cross TX and RX when connecting the peripheral to the UART board of your development board
• On Raspberry Pi 3, the console needs to be disabled, see: UART peripherals on Android Things for Raspberry Pi 3

回答2:

It is stated on the known issues part of the release notes that USB support is disabled on the developer preview 1.

However I did a quick test on the Pi3 and high level peripherals such a keyboard work and send the correct events to the app. It is just the low level access what is disabled.

回答3:

As @devunwired commented in the Google's IoT Developers Community: USB accessory support is not currently enabled is the RC1 preview.

来源：https://stackoverflow.com/questions/41151610/connecting-to-a-usb-peripheral