Android 获取 USB设备列表

获取usb列表
UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE);
        int size = usbManager.getDeviceList().size();
        HashMap<String, UsbDevice> deviceList = usbManager.getDeviceList();
        for (Map.Entry<String, UsbDevice> stringUsbDeviceEntry : deviceList.entrySet()) {
            Toast.makeText(this, stringUsbDeviceEntry.getValue().getProductName()+"            "+stringUsbDeviceEntry.getValue().getManufacturerName(), Toast.LENGTH_SHORT).show();
            Log.e("www",stringUsbDeviceEntry.getKey()+"           "+stringUsbDeviceEntry.getValue().getProductName()+"            "+stringUsbDeviceEntry.getValue().getManufacturerName());
        }

PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
            powerManager.reboot("");

Intent i = new Intent("android.intent.action.ACTION_REQUEST_SHUTDOWN");
i.putExtra("android.intent.extra.KEY_CONFIRM", false); //是否需要确认
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);

PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
Class clazz = pm.getClass();
try{
Method shutdown = clazz.getMethod("shutdown",boolean.class,String.class,boolean.class);
shutdown.invoke(pm,false,"shutdown",false);
}catch (Exception ex){
ex.printStackTrace();
}

android:sharedUserId=“android.uid.system”