to develop android social apps what is essential to know????? and where i should to start??

Question

I want to be build a network to communication my circle... for educational purpose. help me out.

Answer 1

php is what Facebook was written in

Answer 2

you can develop Android app with pure java code or with C# code using Xamarin.
Android Studio is an IDE providing by Google Android to develop that kind of app.
Or you can use MS Visual Studio with Xamarin to build solid social app.
You will find good tutorials on the web to achieve this.

Answer 3

thank u you both are. for your meaning ful answer