From 9feb790a30002b6c17c4a1b4238bd43640697047 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:08:13 +0200
Subject: [PATCH 01/11] chore: migrate example to AGP 9

---
 example/android/app/build.gradle                | 17 ++++-------------
 example/android/build.gradle                    |  9 ++++++---
 example/android/gradle.properties               |  3 +++
 .../gradle/wrapper/gradle-wrapper.properties    |  2 +-
 example/android/settings.gradle                 |  3 +--
 example/pubspec.yaml                            |  4 ++--
 posthog_flutter/android/build.gradle            | 17 +++++++++++------
 pubspec.lock                                    | 12 ++++++------
 8 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index 172242af..20de43d7 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -1,6 +1,5 @@
 plugins {
     id "com.android.application"
-    id "kotlin-android"
     id "dev.flutter.flutter-gradle-plugin"
     // uncomment to upload mapping files to PostHog
     // id "com.posthog.android" version "1.0.3"
@@ -26,7 +25,7 @@ if (flutterVersionName == null) {
 
 android {
     namespace "com.example.flutter"
-    compileSdkVersion flutter.compileSdkVersion
+    compileSdk = flutter.compileSdkVersion
     ndkVersion flutter.ndkVersion
 
     compileOptions {
@@ -34,20 +33,12 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    kotlinOptions {
-        jvmTarget = '1.8'
-    }
-
-    sourceSets {
-        main.java.srcDirs += 'src/main/kotlin'
-    }
-
     defaultConfig {
         applicationId "com.example.flutter"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion flutter.minSdkVersion
-        targetSdkVersion flutter.targetSdkVersion
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
@@ -55,7 +46,7 @@ android {
     buildTypes {
         release {
             minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
             shrinkResources true
             // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig signingConfigs.debug
diff --git a/example/android/build.gradle b/example/android/build.gradle
index bc157bd1..60e4ffd0 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -5,14 +5,17 @@ allprojects {
     }
 }
 
-rootProject.buildDir = '../build'
+def newBuildDir = rootProject.layout.buildDirectory.dir('../build').get()
+rootProject.layout.buildDirectory.value(newBuildDir)
+
 subprojects {
-    project.buildDir = "${rootProject.buildDir}/${project.name}"
+    def newSubprojectBuildDir = newBuildDir.dir(project.name)
+    project.layout.buildDirectory.value(newSubprojectBuildDir)
 }
 subprojects {
     project.evaluationDependsOn(':app')
 }
 
 tasks.register("clean", Delete) {
-    delete rootProject.buildDir
+    delete rootProject.layout.buildDirectory
 }
diff --git a/example/android/gradle.properties b/example/android/gradle.properties
index fbee1d8c..1f6ec9b8 100644
--- a/example/android/gradle.properties
+++ b/example/android/gradle.properties
@@ -1,2 +1,5 @@
 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
+# Flutter's Gradle plugin still uses AGP's legacy variant API.
+# Remove this when Flutter migrates to the new AGP DSL.
+android.newDsl=false
diff --git a/example/android/gradle/wrapper/gradle-wrapper.properties b/example/android/gradle/wrapper/gradle-wrapper.properties
index ca025c83..c61a118f 100644
--- a/example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/example/android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/example/android/settings.gradle b/example/android/settings.gradle
index 0e4b3622..0ef862aa 100644
--- a/example/android/settings.gradle
+++ b/example/android/settings.gradle
@@ -23,8 +23,7 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "8.11.1" apply false
-    id "org.jetbrains.kotlin.android" version "2.2.20" apply false
+    id "com.android.application" version "9.2.1" apply false
 }
 
 include ":app"
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index c5bfc7c4..9cb45065 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -8,8 +8,8 @@ version: 1.0.0+1
 resolution: workspace
 
 environment:
-  sdk: '>=3.11.0 <4.0.0'
-  flutter: '>=3.41.0'
+  sdk: '>=3.12.0 <4.0.0'
+  flutter: '>=3.44.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index 707a544e..c93a9b33 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -22,7 +22,11 @@ allprojects {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+
+def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0] as int
+if (agpMajor < 9) {
+    apply plugin: 'kotlin-android'
+}
 
 android {
     if (project.android.hasProperty("namespace")) {
@@ -36,11 +40,6 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    kotlinOptions {
-        jvmTarget = '1.8'
-        // no need to set languageVersion and apiVersion since we want 2.0 compatibility, but we are compiling using kotlin 2.0 already
-    }
-
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
         test.java.srcDirs += 'src/test/kotlin'
@@ -69,3 +68,9 @@ android {
         }
     }
 }
+
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_1_8
+    }
+}
diff --git a/pubspec.lock b/pubspec.lock
index d191b149..ca8fb347 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -132,10 +132,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
+      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.0"
+    version: "1.18.0"
   path:
     dependency: transitive
     description:
@@ -201,10 +201,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
+      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.10"
+    version: "0.7.11"
   vector_math:
     dependency: transitive
     description:
@@ -230,5 +230,5 @@ packages:
     source: hosted
     version: "1.1.1"
 sdks:
-  dart: ">=3.11.0 <4.0.0"
-  flutter: ">=3.41.0"
+  dart: ">=3.12.0 <4.0.0"
+  flutter: ">=3.44.0"

From 978c89718c0ed6485185264a258874ec4d7e0557 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:19:11 +0200
Subject: [PATCH 02/11] address pr review feedback

---
 posthog_flutter/android/build.gradle |  4 +++-
 pubspec.lock                         | 12 ++++++------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index c93a9b33..efa60006 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 group 'com.posthog.flutter'
 version '1.0-SNAPSHOT'
 
@@ -71,6 +73,6 @@ android {
 
 kotlin {
     compilerOptions {
-        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_1_8
+        jvmTarget = JvmTarget.JVM_1_8
     }
 }
diff --git a/pubspec.lock b/pubspec.lock
index ca8fb347..d191b149 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -132,10 +132,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
+      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
       url: "https://pub.dev"
     source: hosted
-    version: "1.18.0"
+    version: "1.17.0"
   path:
     dependency: transitive
     description:
@@ -201,10 +201,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
+      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.11"
+    version: "0.7.10"
   vector_math:
     dependency: transitive
     description:
@@ -230,5 +230,5 @@ packages:
     source: hosted
     version: "1.1.1"
 sdks:
-  dart: ">=3.12.0 <4.0.0"
-  flutter: ">=3.44.0"
+  dart: ">=3.11.0 <4.0.0"
+  flutter: ">=3.41.0"

From d5c264f14f332602448858dbb3ef5ac6e2af0a6e Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:21:36 +0200
Subject: [PATCH 03/11] fix: guard kotlin compiler options for AGP 9

---
 posthog_flutter/android/build.gradle | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index efa60006..6f0b0ec3 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -28,6 +28,12 @@ apply plugin: 'com.android.library'
 def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0] as int
 if (agpMajor < 9) {
     apply plugin: 'kotlin-android'
+
+    kotlin {
+        compilerOptions {
+            jvmTarget = JvmTarget.JVM_1_8
+        }
+    }
 }
 
 android {
@@ -70,9 +76,3 @@ android {
         }
     }
 }
-
-kotlin {
-    compilerOptions {
-        jvmTarget = JvmTarget.JVM_1_8
-    }
-}

From 79fdc59b27466a9e99dd6de028e42ed5dd700a68 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:25:34 +0200
Subject: [PATCH 04/11] fix: align Kotlin JVM target for AGP 9

---
 example/android/app/build.gradle       |  9 +++++++++
 example/android/app/proguard-rules.pro |  1 +
 posthog_flutter/android/build.gradle   | 13 +++++++------
 3 files changed, 17 insertions(+), 6 deletions(-)
 create mode 100644 example/android/app/proguard-rules.pro

diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index 20de43d7..896006b3 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -1,3 +1,6 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
 plugins {
     id "com.android.application"
     id "dev.flutter.flutter-gradle-plugin"
@@ -58,4 +61,10 @@ flutter {
     source '../..'
 }
 
+tasks.withType(KotlinCompile).configureEach {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_1_8
+    }
+}
+
 dependencies {}
diff --git a/example/android/app/proguard-rules.pro b/example/android/app/proguard-rules.pro
new file mode 100644
index 00000000..a4779c4f
--- /dev/null
+++ b/example/android/app/proguard-rules.pro
@@ -0,0 +1 @@
+# Add project-specific ProGuard/R8 rules here.
diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index 6f0b0ec3..78787a1d 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -1,4 +1,5 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 group 'com.posthog.flutter'
 version '1.0-SNAPSHOT'
@@ -28,12 +29,6 @@ apply plugin: 'com.android.library'
 def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0] as int
 if (agpMajor < 9) {
     apply plugin: 'kotlin-android'
-
-    kotlin {
-        compilerOptions {
-            jvmTarget = JvmTarget.JVM_1_8
-        }
-    }
 }
 
 android {
@@ -76,3 +71,9 @@ android {
         }
     }
 }
+
+tasks.withType(KotlinCompile).configureEach {
+    compilerOptions {
+        jvmTarget = JvmTarget.JVM_1_8
+    }
+}

From f94acbaca4d50b5e6e115b61315d35719fb10e13 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:31:53 +0200
Subject: [PATCH 05/11] fix: enable built-in Kotlin for example

---
 example/android/gradle.properties | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/example/android/gradle.properties b/example/android/gradle.properties
index 1f6ec9b8..a5af03f4 100644
--- a/example/android/gradle.properties
+++ b/example/android/gradle.properties
@@ -3,3 +3,5 @@ android.useAndroidX=true
 # Flutter's Gradle plugin still uses AGP's legacy variant API.
 # Remove this when Flutter migrates to the new AGP DSL.
 android.newDsl=false
+# Enable AGP built-in Kotlin for the migrated example app.
+android.builtInKotlin=true

From 8f7acfb50bfc95f40ba4bba727bad541514af335 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:34:47 +0200
Subject: [PATCH 06/11] fix: restore Flutter APK output path

---
 example/android/build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/example/android/build.gradle b/example/android/build.gradle
index 60e4ffd0..5c986425 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -5,7 +5,7 @@ allprojects {
     }
 }
 
-def newBuildDir = rootProject.layout.buildDirectory.dir('../build').get()
+def newBuildDir = rootProject.layout.buildDirectory.dir('../../build').get()
 rootProject.layout.buildDirectory.value(newBuildDir)
 
 subprojects {

From 0f66c006c62df1e3df0fb63a4e7f654437deb32d Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 13:43:07 +0200
Subject: [PATCH 07/11] chore: add changeset for AGP 9 support

---
 .changeset/quiet-ducks-build.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/quiet-ducks-build.md

diff --git a/.changeset/quiet-ducks-build.md b/.changeset/quiet-ducks-build.md
new file mode 100644
index 00000000..fea6b23c
--- /dev/null
+++ b/.changeset/quiet-ducks-build.md
@@ -0,0 +1,5 @@
+---
+'posthog_flutter': patch
+---
+
+Support Android builds with AGP 9 built-in Kotlin while preserving compatibility with AGP 8 and earlier.

From 2f9661b5b6f7e902f70071c3e994185fc6738b38 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 14:24:49 +0200
Subject: [PATCH 08/11] chore: align example with Flutter Android template

---
 example/android/app/build.gradle       | 70 --------------------------
 example/android/app/build.gradle.kts   | 45 +++++++++++++++++
 example/android/app/proguard-rules.pro |  1 -
 example/android/build.gradle           | 21 --------
 example/android/build.gradle.kts       | 24 +++++++++
 example/android/gradle.properties      |  7 ++-
 example/android/settings.gradle        | 29 -----------
 example/android/settings.gradle.kts    | 26 ++++++++++
 posthog_flutter/android/build.gradle   |  7 +++
 9 files changed, 105 insertions(+), 125 deletions(-)
 delete mode 100644 example/android/app/build.gradle
 create mode 100644 example/android/app/build.gradle.kts
 delete mode 100644 example/android/app/proguard-rules.pro
 delete mode 100644 example/android/build.gradle
 create mode 100644 example/android/build.gradle.kts
 delete mode 100644 example/android/settings.gradle
 create mode 100644 example/android/settings.gradle.kts

diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
deleted file mode 100644
index 896006b3..00000000
--- a/example/android/app/build.gradle
+++ /dev/null
@@ -1,70 +0,0 @@
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
-plugins {
-    id "com.android.application"
-    id "dev.flutter.flutter-gradle-plugin"
-    // uncomment to upload mapping files to PostHog
-    // id "com.posthog.android" version "1.0.3"
-}
-
-def localProperties = new Properties()
-def localPropertiesFile = rootProject.file('local.properties')
-if (localPropertiesFile.exists()) {
-    localPropertiesFile.withReader('UTF-8') { reader ->
-        localProperties.load(reader)
-    }
-}
-
-def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
-if (flutterVersionCode == null) {
-    flutterVersionCode = '1'
-}
-
-def flutterVersionName = localProperties.getProperty('flutter.versionName')
-if (flutterVersionName == null) {
-    flutterVersionName = '1.0'
-}
-
-android {
-    namespace "com.example.flutter"
-    compileSdk = flutter.compileSdkVersion
-    ndkVersion flutter.ndkVersion
-
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
-    defaultConfig {
-        applicationId "com.example.flutter"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdk = flutter.minSdkVersion
-        targetSdk = flutter.targetSdkVersion
-        versionCode flutterVersionCode.toInteger()
-        versionName flutterVersionName
-    }
-
-    buildTypes {
-        release {
-            minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
-            shrinkResources true
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig signingConfigs.debug
-        }
-    }
-}
-
-flutter {
-    source '../..'
-}
-
-tasks.withType(KotlinCompile).configureEach {
-    compilerOptions {
-        jvmTarget = JvmTarget.JVM_1_8
-    }
-}
-
-dependencies {}
diff --git a/example/android/app/build.gradle.kts b/example/android/app/build.gradle.kts
new file mode 100644
index 00000000..e2819edc
--- /dev/null
+++ b/example/android/app/build.gradle.kts
@@ -0,0 +1,45 @@
+plugins {
+    id("com.android.application")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+    // uncomment to upload mapping files to PostHog
+    // id("com.posthog.android") version "1.0.3"
+}
+
+android {
+    namespace = "com.example.flutter"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    defaultConfig {
+        applicationId = "com.example.flutter"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutter.versionCode
+        versionName = flutter.versionName
+    }
+
+    buildTypes {
+        release {
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.getByName("debug")
+        }
+    }
+}
+
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}
+
+flutter {
+    source = "../.."
+}
diff --git a/example/android/app/proguard-rules.pro b/example/android/app/proguard-rules.pro
deleted file mode 100644
index a4779c4f..00000000
--- a/example/android/app/proguard-rules.pro
+++ /dev/null
@@ -1 +0,0 @@
-# Add project-specific ProGuard/R8 rules here.
diff --git a/example/android/build.gradle b/example/android/build.gradle
deleted file mode 100644
index 5c986425..00000000
--- a/example/android/build.gradle
+++ /dev/null
@@ -1,21 +0,0 @@
-allprojects {
-    repositories {
-        google()
-        mavenCentral()
-    }
-}
-
-def newBuildDir = rootProject.layout.buildDirectory.dir('../../build').get()
-rootProject.layout.buildDirectory.value(newBuildDir)
-
-subprojects {
-    def newSubprojectBuildDir = newBuildDir.dir(project.name)
-    project.layout.buildDirectory.value(newSubprojectBuildDir)
-}
-subprojects {
-    project.evaluationDependsOn(':app')
-}
-
-tasks.register("clean", Delete) {
-    delete rootProject.layout.buildDirectory
-}
diff --git a/example/android/build.gradle.kts b/example/android/build.gradle.kts
new file mode 100644
index 00000000..dbee657b
--- /dev/null
+++ b/example/android/build.gradle.kts
@@ -0,0 +1,24 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+val newBuildDir: Directory =
+    rootProject.layout.buildDirectory
+        .dir("../../build")
+        .get()
+rootProject.layout.buildDirectory.value(newBuildDir)
+
+subprojects {
+    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
+    project.layout.buildDirectory.value(newSubprojectBuildDir)
+}
+subprojects {
+    project.evaluationDependsOn(":app")
+}
+
+tasks.register<Delete>("clean") {
+    delete(rootProject.layout.buildDirectory)
+}
diff --git a/example/android/gradle.properties b/example/android/gradle.properties
index a5af03f4..e96108cf 100644
--- a/example/android/gradle.properties
+++ b/example/android/gradle.properties
@@ -1,7 +1,6 @@
 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
-# Flutter's Gradle plugin still uses AGP's legacy variant API.
-# Remove this when Flutter migrates to the new AGP DSL.
+# This newDsl flag was added by the Flutter template
 android.newDsl=false
-# Enable AGP built-in Kotlin for the migrated example app.
-android.builtInKotlin=true
+# This builtInKotlin flag was added by the Flutter template
+android.builtInKotlin=false
diff --git a/example/android/settings.gradle b/example/android/settings.gradle
deleted file mode 100644
index 0ef862aa..00000000
--- a/example/android/settings.gradle
+++ /dev/null
@@ -1,29 +0,0 @@
-pluginManagement {
-    def flutterSdkPath = {
-        def properties = new Properties()
-        file("local.properties").withInputStream { properties.load(it) }
-        def flutterSdkPath = properties.getProperty("flutter.sdk")
-        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
-        return flutterSdkPath
-    }
-    settings.ext.flutterSdkPath = flutterSdkPath()
-
-    includeBuild("${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle")
-
-    repositories {
-        google()
-        mavenCentral()
-        gradlePluginPortal()
-    }
-
-    plugins {
-        id "dev.flutter.flutter-gradle-plugin" version "1.0.0" apply false
-    }
-}
-
-plugins {
-    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "9.2.1" apply false
-}
-
-include ":app"
diff --git a/example/android/settings.gradle.kts b/example/android/settings.gradle.kts
new file mode 100644
index 00000000..f6198875
--- /dev/null
+++ b/example/android/settings.gradle.kts
@@ -0,0 +1,26 @@
+pluginManagement {
+    val flutterSdkPath =
+        run {
+            val properties = java.util.Properties()
+            file("local.properties").inputStream().use { properties.load(it) }
+            val flutterSdkPath = properties.getProperty("flutter.sdk")
+            require(flutterSdkPath != null) { "flutter.sdk not set in local.properties" }
+            flutterSdkPath
+        }
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id("dev.flutter.flutter-plugin-loader") version "1.0.0"
+    id("com.android.application") version "9.2.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.3.20" apply false
+}
+
+include(":app")
diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index 78787a1d..2f51dcbf 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -29,6 +29,13 @@ apply plugin: 'com.android.library'
 def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0] as int
 if (agpMajor < 9) {
     apply plugin: 'kotlin-android'
+} else {
+    def builtInKotlin = providers.gradleProperty('android.builtInKotlin')
+        .map { it.toBoolean() }
+        .getOrElse(true)
+    if (!builtInKotlin) {
+        apply plugin: 'kotlin-android'
+    }
 }
 
 android {

From 796a26c715f6f3a5b6a0a59fa4798047124d8fc7 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 14:31:55 +0200
Subject: [PATCH 09/11] chore: require AGP 8 for Android plugin

---
 .changeset/quiet-ducks-build.md      | 4 ++--
 posthog_flutter/android/build.gradle | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.changeset/quiet-ducks-build.md b/.changeset/quiet-ducks-build.md
index fea6b23c..f8c63c8e 100644
--- a/.changeset/quiet-ducks-build.md
+++ b/.changeset/quiet-ducks-build.md
@@ -1,5 +1,5 @@
 ---
-'posthog_flutter': patch
+'posthog_flutter': minor
 ---
 
-Support Android builds with AGP 9 built-in Kotlin while preserving compatibility with AGP 8 and earlier.
+Support Android builds with AGP 9 built-in Kotlin while preserving compatibility with AGP 8 and earlier. This release requires Android Gradle Plugin 8.0 or newer.
diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index 2f51dcbf..fa89ef04 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -12,7 +12,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.2'
+        classpath 'com.android.tools.build:gradle:8.11.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }

From b1b199bb1f56da829e0105d33ce74747f1e73b49 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Fri, 22 May 2026 14:33:44 +0200
Subject: [PATCH 10/11] docs: clarify built-in Kotlin default

---
 posthog_flutter/android/build.gradle | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/posthog_flutter/android/build.gradle b/posthog_flutter/android/build.gradle
index fa89ef04..1a005c89 100644
--- a/posthog_flutter/android/build.gradle
+++ b/posthog_flutter/android/build.gradle
@@ -30,6 +30,8 @@ def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0
 if (agpMajor < 9) {
     apply plugin: 'kotlin-android'
 } else {
+    // AGP 9 enables built-in Kotlin by default. Flutter templates can explicitly opt out
+    // with android.builtInKotlin=false, in which case we still apply kotlin-android.
     def builtInKotlin = providers.gradleProperty('android.builtInKotlin')
         .map { it.toBoolean() }
         .getOrElse(true)

From 54dfd2a6710bde1d4b192c2eb9fdef513e034074 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <5731772+marandaneto@users.noreply.github.com>
Date: Fri, 22 May 2026 14:49:32 +0200
Subject: [PATCH 11/11] Apply suggestions from code review

Co-authored-by: Manoel Aranda Neto <5731772+marandaneto@users.noreply.github.com>
---
 .changeset/quiet-ducks-build.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.changeset/quiet-ducks-build.md b/.changeset/quiet-ducks-build.md
index f8c63c8e..3e827313 100644
--- a/.changeset/quiet-ducks-build.md
+++ b/.changeset/quiet-ducks-build.md
@@ -2,4 +2,4 @@
 'posthog_flutter': minor
 ---
 
-Support Android builds with AGP 9 built-in Kotlin while preserving compatibility with AGP 8 and earlier. This release requires Android Gradle Plugin 8.0 or newer.
+Support Android builds with AGP 9 built-in Kotlin while preserving compatibility with AGP 8. This release requires Android Gradle Plugin 8.0 or newer.