From f87ca556628e78fde35891dac0a05c7807d31cd1 Mon Sep 17 00:00:00 2001 From: Gabriel Donadel Dall'Agnol Date: Fri, 4 Sep 2026 08:24:06 -0700 Subject: [PATCH] fix(android): skip explicit Kotlin plugin when AGP registers the kotlin extension AGP 9 ships built-in Kotlin support and registers the kotlin extension itself. Applying the Kotlin plugin again fails configuration with "Cannot add extension with name 'kotlin'". Check for the extension directly, which needs no AGP version table and covers AGP 10, where the android.builtInKotlin opt-out is removed. --- package/expo-package/android/build.gradle | 8 +++++++- package/native-package/android/build.gradle | 8 +++++++- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/package/expo-package/android/build.gradle b/package/expo-package/android/build.gradle index e5d534cfc2..e517fc9dfa 100644 --- a/package/expo-package/android/build.gradle +++ b/package/expo-package/android/build.gradle @@ -20,7 +20,13 @@ def isNewArchitectureEnabled() { } apply plugin: "com.android.library" -apply plugin: "kotlin-android" +// AGP 9 ships built-in Kotlin support and registers the `kotlin` extension +// itself. Applying the Kotlin plugin on top of it fails configuration with +// "Cannot add extension with name 'kotlin'". Only apply it when nothing has +// registered that extension yet. +if (project.extensions.findByName('kotlin') == null) { + apply plugin: "kotlin-android" +} if (isNewArchitectureEnabled()) { apply plugin: "com.facebook.react" diff --git a/package/native-package/android/build.gradle b/package/native-package/android/build.gradle index 0d699c4ebf..be804ad0f3 100644 --- a/package/native-package/android/build.gradle +++ b/package/native-package/android/build.gradle @@ -20,7 +20,13 @@ def isNewArchitectureEnabled() { } apply plugin: "com.android.library" -apply plugin: "kotlin-android" +// AGP 9 ships built-in Kotlin support and registers the `kotlin` extension +// itself. Applying the Kotlin plugin on top of it fails configuration with +// "Cannot add extension with name 'kotlin'". Only apply it when nothing has +// registered that extension yet. +if (project.extensions.findByName('kotlin') == null) { + apply plugin: "kotlin-android" +} def appProject = rootProject.allprojects.find { it.plugins.hasPlugin('com.android.application') }