Migrate Android to built-in Kotlin (min Flutter 3.44)

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 6.1.0
+- Updates minimum supported SDK version to Flutter 3.44 / Dart 3.12
+- [Android] Migrates to built-in Kotlin (applies the Kotlin Gradle Plugin only on AGP < 9)
+
 ## 6.0.4
 - [Android] Updated compileSdkVersion to 36, Gradle to 8.14 and Java/Kotlin compatibility to version 17
 

android/build.gradle

@@ -23,7 +23,12 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+
+// AGP 9+ has built-in Kotlin support; older versions need the plugin explicitly.
+def agpMajor = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')[0] as int
+if (agpMajor < 9) {
+    apply plugin: 'kotlin-android'
+}
 
 android {
     // Conditional for compatibility with AGP <4.2.
@@ -38,10 +43,6 @@ android {
         targetCompatibility JavaVersion.VERSION_17
     }
 
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17.toString()
-    }
-
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
@@ -54,6 +55,12 @@ android {
     }
 }
 
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}
+
 dependencies {
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$coroutinesVersion"

pubspec.yaml

@@ -1,12 +1,12 @@
 name: flutter_archive
 description: Create and extract ZIP archive files in Android, iOS and macOS. Zip all files in a directory recursively or a given list of files.
-version: 6.0.4
+version: 6.1.0
 homepage: https://github.com/kineapps/flutter_archive
 repository: https://github.com/kineapps/flutter_archive
 
 environment:
-  sdk: '>=2.15.0 <4.0.0'
-  flutter: ">=2.8.0"
+  sdk: ^3.12.0
+  flutter: ">=3.44.0"
 
 dependencies:
   flutter: