Required Kotlin version
Summary
To build a Flutter app for Android, Kotlin 1.5.31 or greater is required.
If your app uses a lower version, you will receive the following error message:
┌─ Flutter Fix ────────────────────────────────────────────────────────────┐
│ │
│ [!] Your project requires a newer version of the Kotlin Gradle plugin. │
│ Find the latest version on │
│ https://kotlinlang.org/docs/gradle.html#plugin-and-versions, then update │
│ <path-to-app>/android/build.gradle: │
│ ext.kotlin_version = '<latest-version>' │
│ │
└──────────────────────────────────────────────────────────────────────────┘
Context
Flutter added support for foldable devices on Android. This required adding an AndroidX dependency to the Flutter embedding that requires apps to use Kotlin 1.5.31 or greater.
Description of change
A Flutter app compiled for Android now includes the Gradle dependency
androidx.window:window-java.
Migration guide
Open <app-src>/android/build.gradle, and change ext.kotlin_version:
buildscript {
- ext.kotlin_version = '1.3.50'
+ ext.kotlin_version = '1.5.31'
Timeline
Landed in version: v2.9.0 beta
In stable release: 2.10
References
Relevant PR: