.. So basically you can't draw anything. You should try to draw SOMETHING on the screen first instead of drawing the whole map.
Your code isn't helping either. It has nothing to do with rendering. Unless those are classes provided with libgdx.. In which case I would suggest you to use LWJGL.
LWJGL FOR LIFE.
Alright... I can't tell if this comment is living up to your name or not.
What do you mean by "So basically you can't draw anything"?
I clearly stated that this code had been used in the past to draw a map, nothing needs to be drawn before this, also, this is the exact code you can find throughout dermetfans tutorial videos. He draws the map before anything else, aswell. I'm not asking you to 'critique' my code or anything, I displayed it so people wouldn't be asking if I was missing something. They can see it on the main post.
I'm simply asking why this is happening, regardless as to if it's a problem with TSX loading, or what.
EDIT: To answer your first question(or statement?) yes, TiledMap, OrthographicCamera, and OrthogonalTiledMapRenderer are all classes in LibGDX.