Java and Android Studio have a steep learning curve, however. Kotlin – Kotlin is another official Android language. It is similar to Java in many ways but is a little easier to get your head around.

This is what libraries in Android Studio are for. They simply extend the capabilities of Java/Kotlin/the Android SDK by letting you use classes and methods built by other users.

Kotlin offers big advantages over Java for JVM and Android development, and plays nicely with Java in the same projects.

Here's what Meta's developers have learned from moving their code base from the Java programming language over to Kotlin.