问题
I work on a project where I need get data of keyboard and mouse on a service. I also have to be able to send data to my device hid. To do this, I want use the usb host mode. When I get list of device, I can see a mass storage but no mouse and keyboard. After search, I have seen that usbManager don't return mouse and keyboard device. I have tried to change permissions (on /system/etc/permissions) whitout success). I have run the application USB Device Info and I see mouse and keyboard on linux device and not on android devices.
I use android 4.2.2. Is it possible to get hid data of mouse (and keyboard) with usb host or I have to find an other way ?
Thank you for your help
回答1:
You can detect mouse/keyboard via InputManager:
if(Build.VERSION.SDK_INT > 15) {
InputManager inptmgr = (InputManager)getSystemService(INPUT_SERVICE);
int[] inputs = inptmgr.getInputDeviceIds();
for(int i = 0;i<inputs.length;i++) {
String devicename = inptmgr.getInputDevice(inputs[i]).getName();
if(devicename.toLowerCase().contains("mouse")) {
} else if(devicename.toLowerCase().contains("keyboard")) {
}
}
}
As for any other data you may want to collect, you can browse all the other methods under getInputDevice() such as getVendorId(), getProductId(), getMotionRange(), getKeyCharacterMap(), and others.
Hope this helps!
回答2:
If you can already use the HID device for input, it' working as a input device(keyboard or mouse) and you don't need to access it as a USB device. You can simply catch the input from the device via listeners such as OnKeyListener.
来源：https://stackoverflow.com/questions/26103246/cant-see-mouse-and-keyboard-device-with-usbmanager-android