After several hours of hard coding, your brand new Google Glass app is ready. It’s time for a demonstration! But wait… we’re talking about glasses, how is it possible?

Using Google Glass is a single-person experience. That is why a demonstration is a little bit tricky: you cannot see what the user wearing the glasses is doing and you can hardly help him.

But don’t worry! We have a solution for you.

Google Glass Screencast

In this article, we will show you how to duplicate the screen of your Google Glass onto your computer (or your Android device).

Note that you can use the exact same procedure for any other Android device.

Installation

Start by downloading the required tools.

• Install the JDK and add it to your PATH variable.

• Install the SDK Android and add the tools and platform-tools folders to your PATH variable.

• Download Droid@Screen or Android Screen Monitor.

We recommend Droid@Screen which is more user-friendly and provides a lot of useful tools: zoom, rotation…

Demo time

To start the screencast you have to:

• Turn on debug mode on your Google Glass. The option can be found in the Device Info sub-menu in the Settings of your glasses.

• Connect the glasses to your computer through USB. A popup may appear asking you whether you want to trust the computer or not. “Allow” is the right answer!

• If you are using Droid@Screen, simply double-clic on the .jar file. If you are using Android Screen Monitor, open a terminal and enter the following command: java -jar asm.jar.

Wireless!

If you want to be classy and get rid of the USB cable, it is possible! But you will need a few more terminal operations and the latency will probably be higher…

You need ADB (Android Debug Bridge) which you actually already have since it was shipped with the Android SDK. You can find ADB in the platform-tools directory.

• Open a new terminal.

• Plug the glasses to your computer through USB and use the adb devices command to check the connection.

• Find the Google Glass’ IP address by typing adb shell netcfg in the terminal. The IP address (for example 10.0.0.12) should be accessible in the wlan0 section.

• Start TCP mode using the adb tcpip 5555 instruction.

• Launch connection using adb connect [Google Glass IP] (for example adb connect 10.0.0.12)

• Unplug the Google Glass.

If you need to go back to USB mode, enter adb usb.

Using an Android device

If you want to screencast your Google Glass on an other Android device, typically a tablet, Google provides a very useful application : MyGlass.

Download the app, log in using the Google account associated with the glasses and follow the instructions to pair the Android device and the Google Glass. Then, launch the Screencast mode.

One more thing…

The app allows you to control the glasses from the tablet!

Ok Glass… demo time!