The preferred Android language.
WHY IT MATTERS HERE
It is the preferred language for Android, and tooling and documentation assume it.
WHAT IT PROVIDES FOR THIS PLATFORM
Null safety, eliminating the commonest crash Coroutines, for asynchronous work Concise syntax, reducing boilerplate substantially Full interoperability with existing Java code
WHY INTEROPERABILITY MATTERS
Existing applications adopt it gradually, file by file, rather than by rewrite.
WHAT COROUTINES PROVIDE ON ANDROID
Asynchronous work written sequentially, cancelled automatically when a screen is destroyed.
WHY THAT CANCELLATION MATTERS
Work continuing after a screen is gone wastes battery and can crash.
WHAT TO SCOPE COROUTINES TO
The lifecycle of the component that started them.
WHAT KOTLIN MULTIPLATFORM PROVIDES
Sharing business logic across Android, iOS and other targets, with native interfaces on each.
WHAT IT DOES NOT SHARE
The interface, by design.
WHAT THAT DISTINGUISHES IT FROM
Frameworks rendering one interface everywhere.
WHAT TO WEIGH
Whether sharing logic justifies the additional build complexity.
WHAT TO LEARN ALONGSIDE
The platform's architecture guidance, which assumes Kotlin throughout.
