Introduction
Starting with Android 2.1. (API Level 7), developers can create live wallpapers - richer, animated, interactive backgrounds - on their home screens. A live wallpaper is very similar to a normal Android application: you can create menu with settings, use SGL and OpenGL for drawing, accelerometer, etc.
In this article, I want to demonstrate how to create live wallpaper from scratch. Step-by-step, we will create live wallpaper that would output TV test pattern on out home screen. Just like on real TV during night hours!