Android Create an app which already exist but without delete it

Question

For the context I work on AndroidStudio 1.2 and I don't use the androidMarket.

The problem is that I'm trying to install an app (which I improve) on some phone where there is an version of the app(some student have already work on it).

I have this message "App not installed, an existing package by the same name with a conflicting signature is already installed."

I know that this question has already been asked but the answer don't match with my problem. Because I don't want to uninstall the previous app but have the two versions on the phone.

Also, I have tried to change the package name, the name of the app and the signed but nothing seems to work...

I would like to thank you in advance for your help.

Answer 1

This is not the right way to do that. You should import your project as module.