In Android Studio, you can do this:

For example, if you want to change com.example.app to my.awesome.game, then:

1. In your Project pane, click on the little gear icon ( )

2. Uncheck / De-select the Compact Empty Middle Packages option

1. Your package directory will now be broken up in individual directories

2. 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
• 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

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

1. Done! Anyways, Android Studio needs to make this process a little simpler.