Android app how to test Development vs Live version

We will be Beta Testing our app soon and was wondering how you guys test your Android app development versions before pushing to the live version?

Would like to have strictly an app version for development and one live version.

Would you suggest to just copy the entire project and rename the package name? This seems like a hacky way to do it as I would have to copy the altered code back to the live version when ready?

The purpose I ask is would like to be able to have other team members test the development versions too before we decide to push to live.