How to install applications with same package name in android?

Question

Is it possible to install two different applications with same package name in my real device or Android Emulator

Answer 1

The short answer is, "no". That's also the long answer.

Answer 2

No, no two applications with the same package name can exist in any device. The package name identifies your application, and is one of the things that Can Never Change:

http://android-developers.blogspot.com/2011/06/things-that-cannot-change.html

Naturally, you can have different applications with "sibling" package names, so they share a common root. For instance, you could have one application with the package name com.example.foo and another application with the package name com.example.bar.