I want to implement Unity ads into Android game which is created with Libgdx engine.
I searched for solutions on net but i didn't find anything useful, so every help is welcome: Code samples, links with explanations...
Unity provides instructions on integrating Unity ads into any Android application built in the Eclipse IDE here.
Unity ads are not specific to a specific graphics/application framework, so they should work with the provided instructions for any Android app. You might have to wrap your LibGDX in a bit of native Android UI, using the second answer here.