@Lance Nanek basically helped me solved this problem. In case you had the similar problem, these steps might be helpful.
-
run ‘adb devices’ , you should see two devices, one is your
emulator, the other is your device with Android Wear Preview app
installed. -
you might see your emulator offline, if so, kill the emulator. From avd, start it, carefully uncheck ‘launch from snapshot’ – this
is contrast to Android Wear Get started instruction: “Start the AVD
again, but select Launch from snapshot and deselect Save to
snapshot.” - run ‘adb devices’ again, make sure you do see two
devices online - run command ‘adb -d forward tcp:5601 tcp:5601’
- from the android wear preview app, tape connect, you should be ready
to go.