Before you begin, you should familiarize yourself with the device. You can find a high level overview about Glass EE2 in our help center. To develop applications for Glass Enterprise, you need to be familiar with Android development, since the platform is based on Android Open Source Project (AOSP). You can also take a look at sample applications to learn more.
Glass Android OS
Glass EE2 runs on Android Oreo 8.1 (API level 27). The device is shipped without Google Mobile Services(GMS) Core, therefore Google Play services isn't available. This may impact your choice of Google APIs. To develop applications, you need Android Studio and Android SDK 8.1 (API 27).
Migrate from EE1 to EE2
The GDK (Glass Developer Kit) is deprecated on EE2 in favor of the standard Android API level 27 (Android Oreo 8.1) throughout. The first step to port your application from EE1 to EE2 is to remove all references to the GDK.