This is a gradle-based project for Android Studio, tested in Version 3.0.1. It builds an App "YellowRectangle" providing an activity "DrawYellowRectangle".
The app, when launched, clears the display and draws a yellow rectangle on a black backdrop.
This project depends on the Allegro game development library (http://liballeg.org); the dependency is automatically resolved by Android Studio using the Maven AAR distribution at JFrog Bintray (https://bintray.com/liballeg/maven).
Credits
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Elias Pschernig's step-by-step tutorial on using Allegro with Android Studio (https://github.com/liballeg/android).