Update gradle files to match Gradle, Java and Kotlin versions used in the Unity 6000.0.8 export.

Author: timbotimbo

android/build.gradle

@@ -33,7 +33,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 34
 
     // backwards compatible for old gradle versions without namespace
     if (project.android.hasProperty("namespace")) {
@@ -44,15 +44,15 @@ android {
         main.java.srcDirs += 'src/main/kotlin'
     }
     defaultConfig {
-        minSdkVersion 19
+        minSdkVersion 23
     }
     lintOptions {
         disable 'InvalidPackage'
     }
 
     compileOptions {
-        sourceCompatibility 1.8
-        targetCompatibility 1.8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
     }
 }
 

example/android/app/build.gradle

@@ -30,6 +30,11 @@ android {
 
     namespace 'com.xraph.plugin.flutter_unity_widget_example'
 
+     compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

example/android/build.gradle

@@ -1,13 +1,13 @@
 buildscript {
-    ext.kotlin_version = '1.8.22'
+    ext.kotlin_version = '1.9.10'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
         // Unity recommended gradle version https://docs.unity3d.com/Manual/android-gradle-overview.html (higher versions do often work)
-        classpath 'com.android.tools.build:gradle:7.1.2'
+        classpath 'com.android.tools.build:gradle:8.3.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }

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

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip