Update Android-side Gradle stuff + dependencies + upgrade all Flutter packages to latest

android/app/build.gradle

@@ -1,105 +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"
-}
-
-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'
-}
-
-def keystoreProperties = new Properties()
-def keystorePropertiesFile = rootProject.file('key.properties')
-if (keystorePropertiesFile.exists()) {
-    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
-}
-
-android {
-    namespace = "dev.imranr.obtainium"
-    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 = "dev.imranr.obtainium"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://flutter.dev/to/review-gradle-config.
-        minSdk = 24
-        targetSdk = flutter.targetSdkVersion
-        versionCode = flutter.versionCode
-        versionName = flutter.versionName
-    }
-
-    flavorDimensions "flavor"
-
-    productFlavors {
-        normal {
-            dimension "flavor"
-            applicationIdSuffix ""
-        }
-        fdroid {
-            dimension "flavor"
-            applicationIdSuffix ".fdroid"
-        }
-    }
-    
-    signingConfigs {
-        release {
-            keyAlias keystoreProperties['keyAlias']
-            keyPassword keystoreProperties['keyPassword']
-            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
-            storePassword keystoreProperties['storePassword']
-        }
-    }
-
-    buildTypes {
-        release {
-            signingConfig signingConfigs.release
-        }
-        debug {
-            applicationIdSuffix = ".debug"
-            versionNameSuffix = "-debug"
-        }
-    }
-}
-
-flutter {
-    source = "../.."
-}
-
-ext.abiCodes = ["x86_64": 1, "armeabi-v7a": 2, "arm64-v8a": 3]
-import com.android.build.OutputFile
-android.applicationVariants.all { variant ->
-    variant.outputs.each { output ->
-        def abiVersionCode = project.ext.abiCodes.get(output.getFilter(OutputFile.ABI))
-        if (abiVersionCode != null) {
-            output.versionCodeOverride = variant.versionCode * 10 + abiVersionCode
-        } else {
-            output.versionCodeOverride = variant.versionCode * 10
-        }
-    }
-}

android/app/build.gradle.kts

@@ -0,0 +1,107 @@
+import java.io.FileInputStream
+import java.util.Properties
+import com.android.build.api.variant.FilterConfiguration.FilterType.*
+
+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")
+}
+
+val localProperties = Properties()
+val localPropertiesFile = rootProject.file("local.properties")
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.reader(Charsets.UTF_8).use { reader ->
+        localProperties.load(reader)
+    }
+}
+
+var flutterVersionCode = localProperties.getProperty("flutter.versionCode") ?: "1"
+var flutterVersionName = localProperties.getProperty("flutter.versionName") ?: "1.0"
+
+val keystoreProperties = Properties()
+val keystorePropertiesFile = rootProject.file("key.properties")
+if (keystorePropertiesFile.exists()) {
+    keystoreProperties.load(FileInputStream(keystorePropertiesFile))
+}
+
+android {
+    namespace = "dev.imranr.obtainium"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        isCoreLibraryDesugaringEnabled = true
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+
+    defaultConfig {
+        applicationId = "dev.imranr.obtainium"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = 24
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutterVersionCode.toInt()
+        versionName = flutterVersionName
+    }
+
+    flavorDimensions("flavor")
+
+    productFlavors {
+        create("normal") {
+            dimension = "flavor"
+            applicationIdSuffix = ""
+        }
+        create("fdroid") {
+            dimension = "flavor"
+            applicationIdSuffix = ".fdroid"
+        }
+    }
+
+    signingConfigs {
+        create("release") {
+            keyAlias = keystoreProperties["keyAlias"].toString()
+            keyPassword = keystoreProperties["keyPassword"].toString()
+            storeFile = keystoreProperties["storeFile"]?.let { file(it) }
+            storePassword = keystoreProperties["storePassword"].toString()
+        }
+    }
+
+    buildTypes {
+        getByName("release") {
+            signingConfig = signingConfigs.getByName("release")
+        }
+        getByName("debug") {
+            applicationIdSuffix = ".debug"
+            versionNameSuffix = "-debug"
+        }
+    }
+}
+
+val abiCodes = mapOf("x86_64" to 1, "armeabi-v7a" to 2, "arm64-v8a" to 3)
+
+androidComponents {
+    onVariants { variant ->
+        variant.outputs.forEach { output ->
+            val name = output.filters.find { it.filterType == ABI }?.identifier
+            val baseAbiCode = abiCodes[name]
+            if (baseAbiCode != null) {
+                output.versionCode.set(baseAbiCode + ((output.versionCode.get() ?: 0) * 10))
+            }
+        }
+    }
+}
+
+dependencies {
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.5")
+}
+
+flutter {
+    source = "../.."
+}

android/app/src/main/kotlin/dev/imranr/obtainium/MainActivity.kt

@@ -2,4 +2,4 @@ package dev.imranr.obtainium
 
 import io.flutter.embedding.android.FlutterActivity
 
-class MainActivity: FlutterActivity()
+class MainActivity : FlutterActivity()