I understand that MTPDevice is used when I want to talk to a downstream device, while the local Android system operates as a host. But, I am trying to do the opposite. Are there any facilities to allow devices running on an android device to communicate to a host over MTP? I.e. with MTPEvents, etc.
Mostly, I am looking for a way to communicate data to a host PC (via libusb, etc.) while the Android device remains in MTP mode. I am trying to avoid reliance on USB Accessory mode because it is not supported on all Android devices, while MTP support is virtually universal.