Firstly Java was the official language for Android App Development (but now it was replaced by Kotlin) and consequently, it is the most used language as well. Many of the apps in the Play Store are built with Java, and it is also the most supported language by Google.

Why are Android apps written in Java?

When you compile the code that your wrote for an Android app, it is converted into byte code that is suitable for the Android VM (Dalvik) but not for Java’s own JVM. This provides and advantage to the Android platform that a developer does not have to learn a whole new language to develop apps for Android.

Are Android apps made with Java?

Android software development is the process by which applications are created for devices running the Android operating system. Google states that “Android apps can be written using Kotlin, Java, and C++ languages” using the Android software development kit (SDK), while using other languages is also possible.