Question 247522 in Android Studio Question posted in
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Android Studio – How to upgrade my new Android project to Kotlin 1.9?

Kotlin is now version 1.9

When I created a new project in Android Studio (Giraffe), it was still targeting Kotlin 1.8.

I change the build.gradle below to 1.9

    kotlinOptions {
        jvmTarget = "1.9"
    }

But it error out stating Unknown Kotlin JVM target: 1.9

I check https://blog.jetbrains.com/kotlin/2023/07/kotlin-1-9-0-released/, and it mentions

For Android Studio Giraffe (223) and Hedgehog (231), the Kotlin 1.9.0
plugin will be included in upcoming Android Studios updates.

How would I know if I got the plugin already? How to install it if I don’t have the plugin yet?

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3

Answers


  1. Chosen as BEST ANSWER
    0

    Looks like I can set it in the project's build.gradle.kts, i.e. setting it to 1.9.10

    plugins {
    id("com.android.application") version "8.1.0" apply false
    id("org.jetbrains.kotlin.android") version "1.9.10" apply false
}

  2. 0

    In Android Studio:

    Settings -> Languages & Frameworks -> Kotlin

    And you can check your Kotlin version from there.

    EDIT:
    (See this also)

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  3. 0

    I think the problem comes from the typo in a documentation somewhere.
    Like here:
    enter image description here

    Just use jvmTarget = "19" instead. As the documentation says this option meaning is "Target version of the generated JVM bytecode". So "1.9" is impossible as Java 1.9 doesn’t exist.

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