I'm playing around with GameMaker Studio and plan to use it for my next Android project. Yet I am not sure, how can I add java libraries ( jar files ) into it?
For example, if I want to implement LeadBolt's SDK into it... or if I have my own library for recording sounds coming into the microphone... can I add such libraries into GameMaker Studio?
You can't - at least yet.
For the mobile system exports GM:Studio doesn't support extensions.
In the roadmap, you can see that extensions are planned to be supported from version 1.3. The current version line is "1.1", so this feature is still quite some months away.