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kotlin

4 posts

2026-10-31 migration flutter android

Migrate a Flutter Android project's Gradle scripts from Groovy to Kotlin DSL (build.gradle to build.gradle.kts)

A tested, file-by-file conversion of a Flutter app's settings.gradle, build.gradle and app/build.gradle to Kotlin DSL on Flutter 3.44.8, AGP 9.0.1 and Gradle 9.1.0, with the real compiler errors each naive rename produces and the exact fix for signing configs, flavors, minifyEnabled and kotlinOptions.

2026-10-21 errors flutter android

Fix: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is X, expected version is Y (Flutter Android)

A dependency was built with a Kotlin at least two minor versions newer than your build's compiler. Raise the org.jetbrains.kotlin.android version in settings.gradle.kts to X minus one or later, or pin the dependency back.

2026-09-25 errors flutter android

Fix: e: Daemon compilation failed: null in a Flutter Android Gradle build

On Windows, Kotlin incremental compilation fails when the Flutter project and the pub cache sit on different drives. Move PUB_CACHE to the project's drive or turn off IC for pub-cache plugins.

2026-09-18 migration flutter android

Migrate a Flutter Android project to AGP 9 with built-in Kotlin

The full path from an AGP 8 Flutter app that applies kotlin-android to AGP 9.1 with android.builtInKotlin=true on Flutter 3.47. Every step was built and measured, including the two edits that look optional and are not: kotlinOptions is a compile error under KGP 2.2+, and the KGP line in settings.gradle.kts has to stay.