I've been reading the documentation and playing at https://glass-java-starter-demo.appspot.com/ but it seems there is no way to further investigate since when following the instructions from https://developers.google.com/glass/playground at my https://code.google.com/apis/console/ the Google Mirror switch is not showing up. Is there any workaround?
According to issue #2 on the tracker (https://code.google.com/p/google-glass-api/issues/detail?id=2) access is currently restricted to members of the Explorer program with Glass.
With the release of XE12, the Mirror API is open to all developers. However, it's still very important to test your Glassware on Glass before distributing it.
you can use this.
Have a look at https://github.com/scarygami/mirror-api
Yes you can use your Android phone as a Google Glass. Look at this guide Google Glass XE7 APKs
After installing those apks in your phone. Lounch Glass Home app. Then go to MyGlass application and configure your Glass.
Then register for Google Mirror API and follow this quick starter guide Quickstart
Hope this will help you.
It seems possible now: https://developers.google.com/glass/devprev. Similar answer as Jenny but updated.
来源：https://stackoverflow.com/questions/16028805/is-it-possible-to-play-with-google-mirror-api-without-having-the-device