What technologies to be learned to create a Android App

Question

In the market so many languages for the mobile development. I am confused to select which one suit to develop an anroid app

 

I am from Microsoft web technologies background. i worked on angularjs, ASP.MVC, Entityframework and sql server. To develop a android app which language to choose for the development?

 

i would appreciate if you provide the input.

 

Thanks

jai