To make Android apps, Java and Kotlin are not enough. You'll also need to get to grips with the XML markup language - a powerful script for organizing data and creating layouts. Here's everything ...

Android developers can use Java and XML code to define the layouts for each Activity in an application. The application resources folder holds the XML layout files as well as graphics for the GUI.

Since XML files comprise a very large portion of an average Android project (the whole app layout is XML based), keeping XML files tidy becomes a very important, but mundane task.