Network Service Discovery (NSD) found nothing in local network.

[yf...@mobvoi.com]

Currently I'm using NsdManager to implement some feature. I the usual case, this works fine and I can search services in my local network, but there's still a big chance that NsdManager found nothing in my local network. I'm quite sure that there's a lot of services there(eg. printer, macbook bonjour service).

I'v checked the logcat and nothing interest is found.

And suggetions?