Android设备读取不到键盘鼠标等usb设备

解决方法

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")) {

        }
    }
}

android - 使用usbManager android看不到鼠标和键盘设备 - IT工具网 (coder.work)

Can't see mouse and keyboard device with usbManager android - Stack Overflow