AndroidManifest.xml is one of the most important files in your entire project, providing essential information to the Android build tools, the Android operating system and the Google Play store.

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 ...

Another thing to note is the way sizes are defined in Android XML files. In this case, the circle is given a diameter of 20dp. This can also be written as 20dip, as Android will accept either one.