Android app idea

Imagine, a soundboard type app where you can select an HTTP status code and it displays in great big letters on your Android device.

Someone walks up to you while you're busy with something. You select the 404 code and show the offender the 404: Not Found. Someone asks you a stupid question. You flash them a big 400: Bad Request.

What a brilliant communication tool!

I need to learn how to write Android apps now.