This is the Java code for an activity with Floating Action Button (FAB).

And you are right!! There is no performance upgrade if you switch from Java to Kotlin, it will only make your app 800 KB heavier due to its libraries, but just have a look at the code below: Kotlin eventually compiles down to Java Bytecode, so Kotlin people get all the language sugar and the benefits of Kotlin and Java people are none the wiser.īut even now that Kotlin is officially supported to write android apps, you might wonder why do you need to make the switch if there is no performance upgrade. You can write android apps in any language that can compile and run on the Java Virtual Machine (JVM). Kotlin had been stable since 2011, but it was really in 2017 that it took off after Google IO. It’s true that most of the Android Apps today use java, but it’s not your only option.Īt Google I/O 2017, Kotlin was introduced as an alternative to Java for android development. When you look at the pre-requisites of learning Android Development, chances are that Java would be mentioned as the language you must know.

Android studio java kotlin