todotxt_reminder/android/app/build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    //compileSdkVersion flutter.compileSdkVersion
    compileSdkVersion 33 //default: 31, flutter_local_notification needs min 33
    ndkVersion flutter.ndkVersion

    compileOptions {
        //coreLibraryDesugaringEnabled true //flutter_local_notification

        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        applicationId "cloud.dresselhaus.todotxt_reminder"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
        //minSdkVersion flutter.minSdkVersion
        minSdkVersion 20
        //targetSdkVersion flutter.targetSdkVersion
        targetSdkVersion 33 //flutter.targetSdkVersion //33 = Android 13 = needed for request of notification-permissions.
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName

        //flutter_local_notification
        multiDexEnabled true
    }

    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 '../..'
}

dependencies {
    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.0' //1.1.5
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
    implementation 'androidx.window:window:1.0.0'      //flutter_local_notification for Android 12L
    implementation 'androidx.window:window-java:1.0.0' //flutter_local_notification for Android 12L
}