chore: migrate Android module to Flutter's built-in Kotlin and update version to 13.1.0

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 13.1.0
+- **CHORE**(android): Migrate the Android module to Flutter's built-in Kotlin (drop the manual Kotlin Gradle Plugin apply) so the plugin no longer triggers the KGP deprecation warning and stays AGP 9+ compatible. Now requires Flutter 3.44+.
+
 ## 13.0.0
 - **FEAT**(tune): Replace the `luminance` control (which only desaturated) with a real `tint` green–magenta adjustment, the natural complement to `temperature`.
 - **FIX**(filter): Fix `colorOverlay` tinting towards the complementary color instead of the overlay color (inverted sign), and rebuild `fade` as a proper fade (lower contrast + lifted black point) instead of a desaturation.

android/build.gradle

@@ -2,15 +2,13 @@ group = "ch.waio.pro_image_editor"
 version = "1.0-SNAPSHOT"
 
 buildscript {
-    ext.kotlin_version = "2.1.0"
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
         classpath("com.android.tools.build:gradle:8.13.0")
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version")
     }
 }
 
@@ -22,7 +20,6 @@ allprojects {
 }
 
 apply plugin: "com.android.library"
-apply plugin: "kotlin-android"
 
 android {
     namespace = "ch.waio.pro_image_editor"
@@ -34,10 +31,6 @@ android {
         targetCompatibility = JavaVersion.VERSION_17
     }
 
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_17
-    }
-
     sourceSets {
         main.java.srcDirs += "src/main/kotlin"
         test.java.srcDirs += "src/test/kotlin"
@@ -64,3 +57,9 @@ android {
         }
     }
 }
+
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}

example/android/app/build.gradle

@@ -1,6 +1,5 @@
 plugins {
     id "com.android.application"
-    id "kotlin-android"
     id "dev.flutter.flutter-gradle-plugin"
 }
 
@@ -31,10 +30,6 @@ android {
         targetCompatibility JavaVersion.VERSION_17
     }
 
-    kotlinOptions {
-        jvmTarget = '17'
-    }
-
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
@@ -59,6 +54,12 @@ android {
     }
 }
 
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}
+
 flutter {
     source '../..'
 }

example/android/gradle.properties

@@ -1,3 +1,7 @@
 org.gradle.jvmargs=-Xmx4G
 android.useAndroidX=true
 android.enableJetifier=true
+# This builtInKotlin flag was added automatically by Flutter migrator
+android.builtInKotlin=false
+# This newDsl flag was added automatically by Flutter migrator
+android.newDsl=false

example/android/settings.gradle

@@ -20,7 +20,9 @@ pluginManagement {
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
     id "com.android.application" version "8.12.2" apply false
-    id "org.jetbrains.kotlin.android" version "2.2.10" apply false
+    // Kept for third-party plugins that still apply KGP (device_info_plus, audioplayers_android, ...).
+    // The example app itself uses Flutter's built-in Kotlin (no kotlin-android in app/build.gradle).
+    id "org.jetbrains.kotlin.android" version "2.2.20" apply false
 }
 
 include ":app"

lib/features/crop_rotate_editor/widgets/outside_gestures/outside_render_semantics_gesture_handler.dart

@@ -12,16 +12,13 @@ class OutsideRenderSemanticsGestureHandler
   /// Creates a render object that listens for specific semantic gestures.
   OutsideRenderSemanticsGestureHandler({
     super.child,
-    GestureTapCallback? onTap,
-    GestureLongPressCallback? onLongPress,
-    GestureDragUpdateCallback? onHorizontalDragUpdate,
-    GestureDragUpdateCallback? onVerticalDragUpdate,
+    this._onTap,
+    this._onLongPress,
+    this._onHorizontalDragUpdate,
+    this._onVerticalDragUpdate,
     this.scrollFactor = 0.8,
     super.behavior,
-  }) : _onTap = onTap,
-       _onLongPress = onLongPress,
-       _onHorizontalDragUpdate = onHorizontalDragUpdate,
-       _onVerticalDragUpdate = onVerticalDragUpdate;
+  });
 
   /// If non-null, the set of actions to allow. Other actions will be omitted,
   /// even if their callback is provided.

lib/shared/services/content_recorder/controllers/content_recorder_controller.dart

@@ -29,11 +29,11 @@ class ContentRecorderController {
   /// Initializes the controller with the specified configuration.
   /// Optionally enables thumbnail generation and skips initialization.
   ContentRecorderController({
-    required ImageGenerationConfigs configs,
+    required this._configs,
     required this.isVideoEditor,
     this.enableThumbnailGeneration = false,
     bool ignoreGeneration = false,
-  }) : _configs = configs {
+  }) {
     containerKey = GlobalKey();
     recorderKey = GlobalKey();
     recorderStream = StreamController();

lib/shared/services/import_export/export_state_history.dart

@@ -28,20 +28,14 @@ import 'utils/key_minifier.dart';
 class ExportStateHistory {
   /// Constructs an [ExportStateHistory] object with the given parameters.
   ExportStateHistory({
-    required ProImageEditorConfigs editorConfigs,
-    required List<EditorStateHistory> stateHistory,
-    required ImageInfos imageInfos,
-    required int editorPosition,
-    required ContentRecorderController contentRecorderCtrl,
-    required BuildContext context,
-    ExportEditorConfigs configs = const ExportEditorConfigs(),
-  }) : _configs = configs,
-       _editorConfigs = editorConfigs,
-       _stateHistory = stateHistory,
-       _imageInfos = imageInfos,
-       _contentRecorderCtrl = contentRecorderCtrl,
-       _context = context,
-       _editorPosition = editorPosition;
+    required this._editorConfigs,
+    required this._stateHistory,
+    required this._imageInfos,
+    required this._editorPosition,
+    required this._contentRecorderCtrl,
+    required this._context,
+    this._configs = const ExportEditorConfigs(),
+  });
 
   /// The current position of the editor in the state history.
   ///

pubspec.yaml

@@ -1,6 +1,6 @@
 name: pro_image_editor
 description: "A Flutter image editor: Seamlessly enhance your images with user-friendly editing features."
-version: 13.0.0
+version: 13.1.0
 homepage: https://github.com/hm21/pro_image_editor/
 repository: https://github.com/hm21/pro_image_editor/
 documentation: https://github.com/hm21/pro_image_editor/
@@ -31,8 +31,8 @@ platforms:
   windows:
 
 environment:
-  sdk: '>=3.11.0 <4.0.0'
-  flutter: ">=3.41.0"
+  sdk: '>=3.12.0 <4.0.0'
+  flutter: ">=3.44.0"
 
 dependencies:
   flutter: