I want to to make an Android game with libGDX but most of the resources that I found on the internet are using Android Studio (I don't know will it help, if I learn libGDX faster and better?), but I like using Netbeans and don't like developing the Android apps so... Can I learn libGDX without spending times for Android Studio? That's all, thanks!
LibGDX is cross-platform game development framework. Either you're developing an Android app or not, you should use Android Studio/ IntellijIDEA*. It's the only recommendation.
LibGDX using gradle for artifact management but you can also skip gradle and manually inject dependent jar in your project but I think It's totally wastage of time. Don't waste your time in project setup or further project management, in fact of you should focus on game logic.
You can also use any other IDE with gradle management, but I think Android Studio is good and easy to use. Android Studio doesn't have any rocket science logic, it's quite easy. Only you've spent some times with it, that's all.
*Both Android Studio or IntellJIDEA has almost same functions, so you can stick with any one.