AndroidGlobalTime is a 3D world clock and may serve as an illustrative example of how to use the OpenGL ES APIs in an Android applications.
When you launch it, you will see a spinning globe showing day and night regions. Pressing the space bar will overlay an analog clock with the time corresponding to location you are currently examining. The arrow keys allow you to spin the Earth and traverse through different time-zones while the clock is displayed. Pressing the center key in the emulator toggles between a 3D and 2D view of the earth. Pressing the L key will turn the city lights on or off. To zoom-out press 2 and to zoom-in press 8.