How Android studio modifies package names and ApplicationID

Background:

If the new project is very similar to a previous project, then a simple way is to copy the original project, and then modify the code, but the package name is still the original project package name, and if you want to install the new app on the same phone and the original app will find that the new will overwrite the old, This is because their applicationid are the same, and ApplicationID is the identity of an app.

1. Modify the package name

2, modify the method of ApplicationID

How Android studio modifies package names and ApplicationID