halkyon/apps/train/halkyon_train_flutter/android/app/build.gradle.kts

plugins {
    id("com.android.application")
    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
    id("dev.flutter.flutter-gradle-plugin")
}

android {
    namespace = "app.halkyon.train"
    compileSdk = flutter.compileSdkVersion
    ndkVersion = flutter.ndkVersion

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_17
        targetCompatibility = JavaVersion.VERSION_17
    }

    defaultConfig {
        applicationId = "app.halkyon.train"
        // You can update the following values to match your application needs.
        // For more information, see: https://flutter.dev/to/review-gradle-config.
        // Android 8: Health Connect's client needs it (ADR 0030, D31).
        minSdk = 26
        targetSdk = flutter.targetSdkVersion
        // Uses the version code from pubspec.yaml. When using split APKs, 1000 * ABI_VERSION
        // is added automatically by Flutter. (https://developer.android.com/studio/build/configure-apk-splits#configure-APK-versions)
        // You can force using the value of versionCode by specifying the `-P force-version-code-ignoring-abi=true`
        // flag during build.
        versionCode = flutter.versionCode
        versionName = flutter.versionName
    }

    // The app's own key signs release builds when tool/release.dart hands it over
    // through the environment, as Learn's does: the keystore's path and the key's
    // alias, and the password asked for at each release, never written down. Other
    // release builds are signed with the debug key, so `flutter run --release` works
    // anywhere; the release tool releases no APK signed otherwise.
    val releaseKeystore = System.getenv("HALKYON_ANDROID_KEYSTORE")
    signingConfigs {
        if (releaseKeystore != null) {
            create("release") {
                storeFile = file(releaseKeystore)
                keyAlias = System.getenv("HALKYON_ANDROID_KEY_ALIAS")
                // A PKCS #12 keystore has one password, for the store and its key.
                storePassword = System.getenv("HALKYON_ANDROID_KEYSTORE_PASSWORD")
                keyPassword = System.getenv("HALKYON_ANDROID_KEYSTORE_PASSWORD")
            }
        }
    }

    buildTypes {
        release {
            signingConfig =
                signingConfigs.findByName("release") ?: signingConfigs.getByName("debug")
            // Train's keep rules for R8, beside the libraries' and Flutter's.
            proguardFiles("proguard-rules.pro")
        }
    }

    // The native libraries go into the APK compressed, as Learn's: one APK serves
    // every phone, holding them for three architectures, and Android unpacks the
    // phone's own as it installs the app.
    packaging {
        jniLibs {
            useLegacyPackaging = true
        }
    }

    // Leaves out the list of dependencies Gradle would otherwise add to the APK,
    // encrypted for Google Play alone; F-Droid's and others' scanners flag it.
    dependenciesInfo {
        includeInApk = false
        includeInBundle = false
    }
}

kotlin {
    compilerOptions {
        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
    }
}

flutter {
    source = "../.."
}

dependencies {
    // NotificationCompat and ServiceCompat for the recording's foreground service,
    // the version Learn's build uses.
    implementation("androidx.core:core:1.18.0")
    // Health Connect (ADR 0030, D30, D31): AndroidX's client, no Play services.
    implementation("androidx.health.connect:connect-client:1.1.0")
    // The Polar Loop (ADR 0030, D32, D34): Polar's BLE SDK, under Polar's licence.
    implementation("com.github.polarofficial:polar-ble-sdk:8.3.0")
    // The protobuf runtime the SDK brings at run time, at its version, to read
    // the training sessions it gives as Polar's messages (ADR 0030, D39).
    compileOnly("com.google.protobuf:protobuf-javalite:3.20.0")
    testImplementation("com.google.protobuf:protobuf-javalite:3.20.0")
    // The Loop read every few hours while Train is closed (ADR 0030, D37).
    implementation("androidx.work:work-runtime-ktx:2.10.1")
    // Music by cadence in the recording service (ADR 0030, D47, D48): Media3's
    // ExoPlayer, its speed changed with the pitch kept; pinned by its checksums
    // in gradle/verification-metadata.xml.
    implementation("androidx.media3:media3-exoplayer:1.10.1")
    // The recorder's pure Kotlin parts (auto-pause) tested on the JVM.
    testImplementation("junit:junit:4.13.2")
}