Add namespace for Android gradle plugin (AGP) 8 compatibility.

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## Pending (master branch only)
 * [Android] Fix touch detection when using Unity's New Input System. [#938](https://github.com/juicycleff/flutter-unity-view-widget/pull/938)
 * [Android] Workaround for mUnityplayer error in Unity plugins using the AndroidJavaProxy. [#908](https://github.com/juicycleff/flutter-unity-view-widget/pull/908)
+* [Android] Add namespace for Android gradle plugin (AGP) 8 compatibility.
 
 ## 2022.2.1
 

android/build.gradle

@@ -5,7 +5,7 @@ buildscript {
     ext.kotlin_version = '1.6.20'
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
@@ -17,7 +17,7 @@ buildscript {
 rootProject.allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
 
         // DO NOT MODIFY
         // BUILD_ADD_UNITY_LIBS
@@ -35,6 +35,11 @@ apply plugin: 'kotlin-android'
 android {
     compileSdkVersion 29
 
+    // backwards compatible for old gradle versions without namespace
+    if (project.android.hasProperty("namespace")) {
+        namespace 'com.xraph.plugin.flutter_unity_widget'
+    }
+
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

example/android/app/build.gradle

@@ -27,6 +27,8 @@ apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
     compileSdkVersion 34
+
+    namespace 'com.xraph.plugin.flutter_unity_widget_example'
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'