SL4A allows to run scripts in android using most APIs that are available to native apps except that the process is simpler. It can be used to build anything from home automation systems to high altitude ballooning projects.
on Android. Has access to the most commonly used APIs that normal Java based applications use. Very simple and easy to code. Helpful in situations when you need to quickly script your phone for something*. Scripting Layer For Android(SL4A)
beach on a fine evening and you happen to see a dramatic sunset. You would like to get a timelapse shot. But, wait. You don’t have a timelapse app installed in your phone.