For example, if you want to change to, then:

In your Project pane, click on the little gear icon (Gears icon)8df64537-0541-47c3-b517-2095c30740a9-image.png

Uncheck the Compact Empty Middle Packages option

Your package directory will now be broken up into individual directories

Individually select each directory you want to rename, and:

Right-click it Select Refactor Click on Rename In the pop-up dialog, click on Rename Package instead of Rename Directory Enter the new name and hit Refactor Click Do Refactor in the bottom Allow a minute to let Android Studio update all changes

Note: When renaming com in Android Studio, it might give a warning. In such case, select Rename All

Now open your Gradle Build File (build.gradle - Usually app or mobile). Update the applicationId in the defaultConfig to your new Package Name and Sync Gradle, if it hasn’t already been updated automatically:

You may need to change the package= attribute in your manifest.
Clean and Rebuild.
Done! Anyway, Android Studio needs to make this process a little simpler.