Bump Java to 17 (#42)

* raise Android SDK to 35
* raise min Android SDK to 21 as required by the Flutter 3.22 constraint
* raise Dart SDK constraint to match Flutter 3.22 constraint
* bump Gradle/Kotlin/AGP to match

Author: kuhnroyal

.github/workflows/test.yml

@@ -17,11 +17,12 @@ jobs:
          - ubuntu-latest
          - macos-latest
     steps:
-      - uses: actions/checkout@v1
-      - uses: actions/setup-java@v1
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
         with:
-          java-version: '12.x'
-      - uses: subosito/flutter-action@v1
+          distribution: 'temurin'
+          java-version: '17'
+      - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
       - run: dart --version

android/build.gradle

@@ -2,14 +2,14 @@ group 'net.wolverinebeach.flutter_timezone'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.6.21'
+    ext.kotlin_version = '1.7.10'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.2'
+        classpath 'com.android.tools.build:gradle:7.3.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -26,30 +26,28 @@ apply plugin: 'kotlin-android'
 
 android {
     namespace 'net.wolverinebeach.flutter_timezone'
-    compileSdkVersion 34
+    compileSdkVersion 35
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_17
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
     defaultConfig {
-        targetSdkVersion 34
-        minSdkVersion 16
+        minSdkVersion 21
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
     }
     lintOptions {
         disable 'InvalidPackage'
     }
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_1_8
+        jvmTarget = JavaVersion.VERSION_17
     }
 }
-
-dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-
-}
-
-java {
-    sourceCompatibility = JavaVersion.VERSION_1_8
-    targetCompatibility = JavaVersion.VERSION_1_8
-}

android/gradle/wrapper/gradle-wrapper.properties

@@ -24,16 +24,16 @@ if (flutterVersionName == null) {
 
 android {
     namespace "net.wolverinebeach.flutter_timezone_example"
-    compileSdk flutter.compileSdkVersion
+    compileSdk 35
     ndkVersion flutter.ndkVersion
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
 
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = JavaVersion.VERSION_17
     }
 
     sourceSets {
@@ -46,7 +46,7 @@ android {
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
         minSdkVersion flutter.minSdkVersion
-        targetSdkVersion flutter.targetSdkVersion
+        targetSdkVersion 35
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

example/android/app/build.gradle

@@ -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-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -19,7 +19,7 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
+    id "com.android.application" version "8.1.0" apply false
     id "org.jetbrains.kotlin.android" version "1.7.10" apply false
 }
 

example/android/settings.gradle

@@ -5,7 +5,7 @@ description: "Demonstrates how to use the flutter_timezone plugin."
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 
 environment:
-  sdk: '>=3.3.0 <4.0.0'
+  sdk: '>=3.4.0 <4.0.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

example/pubspec.yaml

@@ -4,7 +4,7 @@ version: 3.0.1
 homepage: https://github.com/tjarvstrand/flutter_timezone
 
 environment:
-  sdk: '>=2.12.0 <4.0.0'
+  sdk: '>=3.4.0 <4.0.0'
   flutter: ">=3.22.0"
 
 dependencies: