gradle, update versions for Kotlin, AGP, and Gradle.

Reviewed-on: #3

.gitignore

@@ -47,3 +47,7 @@ app.*.map.json
 
 # Ignore the releases folder.
 releases/*
+
+# Ignore build files from Android.
+android/build/*
+android/app/build/*

android/app/build.gradle

@@ -1,44 +0,0 @@
-plugins {
-    id "com.android.application"
-    id "kotlin-android"
-    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
-    id "dev.flutter.flutter-gradle-plugin"
-}
-
-android {
-    namespace = "com.hyperling.expense_tracker"
-    compileSdk = flutter.compileSdkVersion
-    ndkVersion = flutter.ndkVersion
-
-    compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
-    }
-
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_1_8
-    }
-
-    defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.hyperling.expense_tracker"
-        // 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 {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig = signingConfigs.debug
-        }
-    }
-}
-
-flutter {
-    source = "../.."
-}

android/app/build.gradle.kts

@@ -1,7 +1,8 @@
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+
 plugins {
     id("com.android.application")
-    id("kotlin-android")
-    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    // AGP 9 bundles Kotlin natively - no explicit plugin needed here
     id("dev.flutter.flutter-gradle-plugin")
 }
 
@@ -11,19 +12,19 @@ android {
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_11
-        targetCompatibility = JavaVersion.VERSION_11
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
 
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_11.toString()
+    // AGP 9's bundled Kotlin - use the native DSL
+    kotlin {
+        compilerOptions {
+            jvmTarget.set(JvmTarget.JVM_17)
+        }
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId = "com.hyperling.expense_tracker"
-        // 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
@@ -32,8 +33,6 @@ android {
 
     buildTypes {
         release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig = signingConfigs.getByName("debug")
         }
     }

android/app/src/main/AndroidManifest.xml

@@ -2,8 +2,7 @@
     <application
         android:label="Expenses"
         android:name="${applicationName}"
-        android:icon="@mipmap/icon_v003"
-        android:roundIcon="@mipmap/icon_v003_round">
+        android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
             android:exported="true"

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+    <monochrome android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/ic_launcher_background"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+    <monochrome android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

android/app/src/main/res/values/ic_launcher_background.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#FFFFFF</color>
+</resources>

android/build.gradle

@@ -1,18 +1,2 @@
-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
-}
+// Expose Kotlin version for Flutter's plugin validation (AGP 9 bundles Kotlin natively)
+ext.kotlin_version = "2.4.20"

android/gradle.properties

@@ -1,3 +1,9 @@
 org.gradle.jvmargs=-Xmx4G -XX:MaxMetaspaceSize=2G -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true
+# This builtInKotlin flag was added automatically by Flutter migrator
+android.builtInKotlin=true
+# This newDsl flag was added automatically by Flutter migrator
+android.newDsl=false
+# Force the Kotlin version resolver in AGP 9 to use our target version
+kotlin.version=2.4.20

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-8.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.8.2-bin.zip

android/settings.gradle

@@ -1,25 +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
-    }()
-
-    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 "8.1.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
-}
-
-include ":app"

android/settings.gradle.kts

@@ -18,8 +18,12 @@ pluginManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.7.0" apply false
-    id("org.jetbrains.kotlin.android") version "1.8.22" apply false
+
+    id("com.android.application") version "9.5.0" apply false
+
+    // This must exist to satisfy Flutter's Gradle plugin validation for AGP 9 bundled Kotlin:
+    // "Error: Your project's Kotlin version (2.2.10) is lower than Flutter's minimum supported version of 2.2.20."
+    id("org.jetbrains.kotlin.android") version "2.4.21" apply false
 }
 
 include(":app")

pubspec.yaml

@@ -2,7 +2,7 @@ name: expense_tracker
 homepage: https://git.hyperling.com/me/flutter-expense-tracker
 description: Track recurring expenses against income and liquid assets.
 publish_to: 'none'
-version: 0.1.3
+version: 0.1.4
 
 environment:
   sdk: ^3.6.1