In this tutorial I show how you can make an overlay or second activity which overlays your main activity with a transparent overlay which you can use to show an instruction in the screen. This is often used to show the user key features of your app when they use your app the first time.
Note that this tutorial is part of a set of tutorials to develop an app to store locally your clothing sizes. Yeah Yeah, pretty useful ;)
If your wondering how to make the background gradient or the used action bar please see the following two tutorials.