How to create only Android UI elements?

I want to make a cross-platform game (PC + Android).
How can i create “only android” UI elements (like pause button, move left and move right button, jump button, etc…) without commenting UI codes when i build the project for PC.

(Sorry for my English.)

Edit:
I found a thread for this: How to tell if the device is android or ios - Questions & Answers - Unity Discussions

I see that you already found your solution. Just for future visits, use this line:androidUIGameObject.setActive(Application.platform == RuntimePlatform.Android);

It might be easier to use preprocessor directives if you have a lot of objects. See Unity - Manual: Conditional compilation