Is it possible to get the user's location without using the Mirror API?
The hacking glass Google I/O video mentioned several android apis currently work and listed gps as one of them, however I have not had luck so far. I know Glass does not have GPS itself and must use the paired phones GPS. Would be awesome if we could use existing android location manager or newer Google play services location apis!
Yes, you can - if you use the GDK examples as a base and follow the Location Strategies (http://developer.android.com/guide/topics/location/strategies.html).
For a specific example, I just posted a hack of the GDK Compass sample in answer to another question that adds location updates pulled from the GPS (with or without a paired phone):
Google Glass does NOT have a GPS chip in it. I don't see why you could not have an apk that uses the LocationManager and add a listener to it that would print out the latitude and longitude in Logcat or even on GLASS itself. Now, to get that location to a remote user, that would require more work than not using the Mirror API.
来源：https://stackoverflow.com/questions/18343373/location-on-google-glass