Travis O'Brien has written 2 articles for SitePoint.
Handling Player Input in Cross-Platform Games with LibGDX
Interactivity is crucial in cross-platform games and in this tutorial Travis O'Brien covers handling player input with LibGDX.
Cross-Platform Games and Applications with libGDX – Setup
Travis O'Brien starts a series on using libGDX to create high powered cross-platform applications and games.