Publishing the same app with different versions

I'm working on an app and I want to have three versions for sale. Basically an economy, standard, and advanced version. I have a switch where you change a variable and that sets what version is compiled.

When I try to publish the app, it says that an app with the package name already exists.

Do I need to sign each package with a unique key, or do I need to change the whole package name for each version? If I need to change the package name, what is the easiest way 开发者_JAVA百科to do it?

Thanks.

You should convert your project to Android Library. And then create three application projects, each of which would have different package names with different "variable".

1. com.you.package.economy, -> sets variable to economy
2. com.you.package.standard -> sets variable to standard
3. com.you.package.advanced, -> sets variable to advanced

For more information about Android Libraries see documentation. If you need more in-depth information how Android Libraries work see my post.