Is your Android mobile user-friendly? It is Java Swing that creates graphical user interfaces on Java-based mobile devices. You have most likely used Java-powered apps on your Android tablet or smartphone without realizing it. Java is the main language used to write Android applications; hence, it plays a major role in Android app development. But it’s important to remember that Java’s hegemony may eventually shift with the introduction of Kotlin, an official Android programming language.
Java for Android Development