android studio change package name

In Android Studio, you can do this:
For example, if you want to change com.example.app to my.awesome.game, then:

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

Uncheck the Compact Empty Middle Packages option

Compact Empty Middle Packages

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

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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:

Refactor Directories

You may need to change the package= attribute in your manifest.

Clean and Rebuild.

Clean and Rebuild

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