Understanding the Importance of Aligning Folder Structure with ApplicationId When Modifying the Android Bundle ID in Ionic Capacitor

[matzar]

When modifying the applicationId in capacitor.config.ts, say from io.ionic.starter to my.own.id, and subsequently running cap sync android, the Android project's corresponding package in MainActivity.java and namespace in app/build.gradle should be updated.

However, using Ionic's VS Code extension to change your Android Bundle Id ensures not only the proper update of these aspects but also alters the folder structure where MainActivity.java is located. For instance, the file path would shift from android/app/src/main/java/io/ionic/starter/MainActivity.java to android/app/src/main/java/my/own/id/MainActivity.java. Such a change doesn't occur when simply running cap sync android.

The crux of the issue lies in understanding the significance of having a folder structure in MainActivity.java closely aligned with the applicationId. In other words, how crucial is it for an Android app, with applicationId set as my.own.id, to position its MainActivity.java in the corresponding folder structure, i.e., android/app/src/main/java/my/own/id/MainActivity.java ?