Android Studio or Xamarin? Which is better?

Yes

One is a service (framework?) for visual studio using c#, used to develop cross platform apps

The other is a java ide used to develop android apps

So yes.

@RazorSh4rk so I believe both is good to use?

Depends on what you want to do.

Complex Android app using dank Java/Android libraries? Android Studio.

Simple app that can be used on Android and iOS (crossplatform)? Xamarin. There are also other platforms. For example devRant app is made with Appcelerator. It allows you to create your apps with JavaScript.

@xios I see. Thanks for the insight. Much appreciated.

Xamarin :D I may be biased though

7

Android Studio is based on IntelliJ. So Android Studio. :D

I use both. It depends on the project...

@lukegv eclipse, angular, qt

Xamarin is user friendly so if you're new it's nice but Java is the way to go for complex apps... It's a tough question