To build a Flutter app for Android, Kotlin 1.5.31 or greater is required.
Original behavior
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.
New behavior
A Flutter app compiled for Android now includes the Gradle dependency `androidx.window:window-java`.
- Who is affected
- Applications and packages relying on the previous behaviour or signature.
- Practical impact
- Behaviour or API differences that can break builds or change runtime behaviour.
- What action should I take?
- Follow the official migration guide below, update affected call sites, run `dart fix --apply` where a fix is available, then run your tests.
Official migration guide (excerpt, © The Flutter Authors, CC BY 3.0)
Open <app-src>/android/build.gradle, and change ext.kotlin_version:
buildscript {
- ext.kotlin_version = '1.3.50'
+ ext.kotlin_version = '1.5.31'AI_PROVIDER (for example to openai-compatible with a local Ollama or LM Studio endpoint) to enable grounded explanations. Everything else on this page works without an AI provider.Listed in the official breaking-changes index (docs.flutter.dev/release/breaking-changes).
An official announcement or migration guide documents an intended behaviour or API change. A verified source change (git diff) shows code changed but does not by itself prove a public API is breaking. AI interpretations are labelled and never used to classify a change.
- Source commit
- b3045439b7c0
- Source last updated
- Oct 21, 2026
- Last synchronized
- Oct 21, 2026
- Publication status
- published
Publication history
- Oct 21, 2026, 8:31 PM: new → published (ingestion) — Backed by an official breaking-change/migration guide.
AI_PROVIDER (for example to openai-compatible with a local Ollama or LM Studio endpoint) to enable grounded explanations. Everything else on this page works without an AI provider.