Migrate Android build scripts to Kotlin DSL (#58)

Replaces Groovy-based Gradle files with Kotlin DSL equivalents for build.gradle, settings.gradle, and app/build.gradle. Updates AndroidManifest.xml to add taskAffinity and queries for PROCESS_TEXT intent. Refactors MainActivity.kt for cleaner syntax. Increases Gradle JVM memory settings and updates Gradle wrapper and plugin versions for improved build performance and compatibility.

{{cookiecutter.out_dir}}/android/app/build.gradle

@@ -1,105 +0,0 @@
-plugins {
-    id "com.android.application"
-    id "org.jetbrains.kotlin.android"
-    id "dev.flutter.flutter-gradle-plugin"
-}
-
-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 "{{ cookiecutter.org_name_2 }}.{{ cookiecutter.package_name }}"
-    compileSdkVersion flutter.compileSdkVersion
-
-    packagingOptions {
-        jniLibs {
-            useLegacyPackaging true
-        }
-        doNotStrip "*/arm64-v8a/libpython*.so"
-        doNotStrip "*/armeabi-v7a/libpython*.so"
-        doNotStrip "*/x86/libpython*.so"
-        doNotStrip "*/x86_64/libpython*.so"
-    }
-    
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
-    }
-
-    kotlinOptions {
-        jvmTarget = '17'
-    }
-
-    sourceSets {
-        main.java.srcDirs += 'src/main/kotlin'
-    }
-
-    {% set min_sdk_version = get_pyproject("tool.flet.android.min_sdk_version") %}
-    {% set target_sdk_version = get_pyproject("tool.flet.android.target_sdk_version") %}
-
-    defaultConfig {        
-        applicationId "{{ cookiecutter.org_name_2 }}.{{ cookiecutter.package_name }}"
-        minSdkVersion {{ min_sdk_version if min_sdk_version else "flutter.minSdkVersion" }}
-        targetSdkVersion {{ target_sdk_version if target_sdk_version else "flutter.targetSdkVersion" }}
-        versionCode flutterVersionCode.toInteger()
-        versionName flutterVersionName
-
-        println("Gradle build config:")
-        println("  minSdkVersion: {{ min_sdk_version if min_sdk_version else "$flutter.minSdkVersion" }}")
-        println("  targetSdkVersion: {{ target_sdk_version if target_sdk_version else "$flutter.targetSdkVersion" }}")
-        println("  versionCode: $flutter.versionCode")
-        println("  versionName: $flutter.versionName")
-
-// flet: split_per_abi {% if not cookiecutter.split_per_abi %}
-        ndk {
-            {% if cookiecutter.options.target_arch %}
-            abiFilters {% for arch in cookiecutter.options.target_arch %}'{{ arch }}'{% if not loop.last %}, {% endif %}{% endfor %}
-            {% else %}
-            abiFilters 'arm64-v8a', 'armeabi-v7a', 'x86_64'
-            {% endif %}
-        }
-// flet: end of split_per_abi {% endif %}
-    }
-
-// flet: android_signing {% if cookiecutter.options.android_signing %}
-    signingConfigs {
-        release {
-            keyAlias System.getenv('FLET_ANDROID_SIGNING_KEY_ALIAS')
-            keyPassword System.getenv('FLET_ANDROID_SIGNING_KEY_PASSWORD')
-            storeFile System.getenv('FLET_ANDROID_SIGNING_KEY_STORE') ? file(System.getenv('FLET_ANDROID_SIGNING_KEY_STORE')) : null
-            storePassword System.getenv('FLET_ANDROID_SIGNING_KEY_STORE_PASSWORD')
-        }
-    }
-// flet: end of android_signing {% endif %}
-
-    buildTypes {
-        release {
-// flet: android_signing {% if cookiecutter.options.android_signing %}
-            signingConfig signingConfigs.release
-// {% else %}
-            signingConfig signingConfigs.debug
-// flet: end of android_signing {% endif %}
-        }
-    }
-}
-
-flutter {
-    source '../..'
-}
-
-dependencies {}

{{cookiecutter.out_dir}}/android/app/build.gradle.kts

@@ -0,0 +1,103 @@
+import java.util.Properties
+
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+}
+
+val localProperties = Properties().apply {
+    val localPropertiesFile = rootProject.file("local.properties")
+    if (localPropertiesFile.exists()) {
+        localPropertiesFile.inputStream().use { load(it) }
+    }
+}
+
+val flutterVersionCode = localProperties.getProperty("flutter.versionCode")?.toIntOrNull() ?: 1
+val flutterVersionName = localProperties.getProperty("flutter.versionName") ?: "1.0"
+
+android {
+    namespace = "{{ cookiecutter.org_name_2 }}.{{ cookiecutter.package_name }}"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    packaging {
+        jniLibs {
+            useLegacyPackaging = true
+            keepDebugSymbols += listOf(
+                "*/arm64-v8a/libpython*.so",
+                "*/armeabi-v7a/libpython*.so",
+                "*/x86/libpython*.so",
+                "*/x86_64/libpython*.so",
+            )
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_17.toString()
+    }
+
+    sourceSets["main"].java.srcDir("src/main/kotlin")
+
+    {% set min_sdk_version = get_pyproject("tool.flet.android.min_sdk_version") %}
+    {% set target_sdk_version = get_pyproject("tool.flet.android.target_sdk_version") %}
+
+    defaultConfig {
+        applicationId = "{{ cookiecutter.org_name_2 }}.{{ cookiecutter.package_name }}"
+        val resolvedMinSdk = {{ min_sdk_version if min_sdk_version else "flutter.minSdkVersion" }}
+        minSdk = resolvedMinSdk
+        val resolvedTargetSdk = {{ target_sdk_version if target_sdk_version else "flutter.targetSdkVersion" }}
+        targetSdk = resolvedTargetSdk
+        versionCode = flutterVersionCode
+        versionName = flutterVersionName
+
+        println("Gradle build config:")
+        println("  minSdkVersion: $resolvedMinSdk")
+        println("  targetSdkVersion: $resolvedTargetSdk")
+        println("  versionCode: $flutterVersionCode")
+        println("  versionName: $flutterVersionName")
+
+// flet: split_per_abi {% if not cookiecutter.split_per_abi %}
+        ndk {
+            {% if cookiecutter.options.target_arch %}
+            abiFilters += listOf({% for arch in cookiecutter.options.target_arch %}"{{ arch }}"{% if not loop.last %}, {% endif %}{% endfor %})
+            {% else %}
+            abiFilters += listOf("arm64-v8a", "armeabi-v7a", "x86_64")
+            {% endif %}
+        }
+// flet: end of split_per_abi {% endif %}
+    }
+
+// flet: android_signing {% if cookiecutter.options.android_signing %}
+    signingConfigs {
+        create("release") {
+            keyAlias = System.getenv("FLET_ANDROID_SIGNING_KEY_ALIAS")
+            keyPassword = System.getenv("FLET_ANDROID_SIGNING_KEY_PASSWORD")
+            storeFile = System.getenv("FLET_ANDROID_SIGNING_KEY_STORE")?.let { file(it) }
+            storePassword = System.getenv("FLET_ANDROID_SIGNING_KEY_STORE_PASSWORD")
+        }
+    }
+// flet: end of android_signing {% endif %}
+
+    buildTypes {
+        release {
+// flet: android_signing {% if cookiecutter.options.android_signing %}
+            signingConfig = signingConfigs.getByName("release")
+// {% else %}
+            signingConfig = signingConfigs.getByName("debug")
+// flet: end of android_signing {% endif %}
+        }
+    }
+}
+
+flutter {
+    source = "../.."
+}
+
+dependencies {}

{{cookiecutter.out_dir}}/android/app/src/main/AndroidManifest.xml

@@ -23,6 +23,7 @@
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
+            android:taskAffinity=""
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
@@ -57,4 +58,15 @@
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT" />
+            <data android:mimeType="text/plain" />
+        </intent>
+    </queries>
 </manifest>

{{cookiecutter.out_dir}}/android/app/src/main/kotlin/{{ cookiecutter.kotlin_dir }}/MainActivity.kt

@@ -2,5 +2,4 @@ package {{ cookiecutter.org_name_2 }}.{{ cookiecutter.package_name }}
 
 import io.flutter.embedding.android.FlutterActivity
 
-class MainActivity: FlutterActivity() {
+class MainActivity : FlutterActivity()
-}

{{cookiecutter.out_dir}}/android/build.gradle

@@ -1,18 +0,0 @@
-allprojects {
-    repositories {
-        google()
-        mavenCentral()
-    }
-}
-
-rootProject.buildDir = '../build'
-subprojects {
-    project.buildDir = "${rootProject.buildDir}/${project.name}"
-}
-subprojects {
-    project.evaluationDependsOn(':app')
-}
-
-tasks.register("clean", Delete) {
-    delete rootProject.buildDir
-}

{{cookiecutter.out_dir}}/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)
+}

{{cookiecutter.out_dir}}/android/gradle.properties

@@ -1,3 +1,2 @@
-org.gradle.jvmargs=-Xmx4G -XX:MaxMetaspaceSize=2G -XX:+HeapDumpOnOutOfMemoryError
+org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
-android.enableJetifier=true

{{cookiecutter.out_dir}}/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-all.zip

{{cookiecutter.out_dir}}/android/settings.gradle

@@ -1,30 +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 "8.6.1" apply false
-    id "org.jetbrains.kotlin.android" version "2.1.0" apply false
-}
-
-include ":app"

{{cookiecutter.out_dir}}/android/settings.gradle.kts

@@ -0,0 +1,27 @@
+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
+        }
+    settings.extra["flutterSdkPath"] = 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 "8.11.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.2.20" apply false
+}
+
+include(":app")