Three years ago, Android introduced Kotlin as an officially supported language. Today, 70% of top 1k Android apps now use Kotlin. Kotlin 1.4 will soon be released, with a new backend compiler and support for Android’s new UI toolkit, Jetpack Compose. In this talk, we review what’s new in Kotlin on Android, including coroutine-first Jetpack libraries like Paging 3.0, review JetBrains and Google’s joint work on moving the language and tooling forward, and discuss how we decided to make coroutines the recommended approach for async work on Android.

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