chore: update ui-mobile-base android script to support Java 21 and gradle 8+ (#10907)

Also allows fallbacks per detection.

packages/ui-mobile-base/android/build.gradle

@@ -6,7 +6,8 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.1.0'
+        // Updated for Java 21 compatibility via Gradle 8.4
+        classpath 'com.android.tools.build:gradle:8.3.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

packages/ui-mobile-base/android/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

packages/ui-mobile-base/android/widgets/build.gradle

@@ -6,7 +6,7 @@ def isWinOs = System.properties['os.name'].toLowerCase().contains('windows')
 
 apply plugin: 'com.android.library'
 
-def computeCompileSdkVersion () {
+def computeCompileSdkValue () {
     if(project.hasProperty("compileSdk")) {
         return compileSdk
     }
@@ -15,15 +15,6 @@ def computeCompileSdkVersion () {
     }
 }
 
-def computeBuildToolsVersion() {
-    if(project.hasProperty("buildToolsVersion")) {
-        return buildToolsVersion
-    }
-    else {
-        return "32.0.0"
-    }
-}
-
 def computeTargetSdkVersion() {
     if(project.hasProperty("targetSdk")) {
         return targetSdk
@@ -34,12 +25,13 @@ def computeTargetSdkVersion() {
 }
 
 android {
-    compileSdkVersion computeCompileSdkVersion()
+    // AGP 8 DSL: use 'compileSdk' and specify namespace
-    buildToolsVersion computeBuildToolsVersion()
+    compileSdk computeCompileSdkValue()
+    namespace "org.nativescript.widgets"
 
     defaultConfig {
-        minSdkVersion 17
+        minSdk 17
-        targetSdkVersion computeTargetSdkVersion()
+        targetSdk computeTargetSdkVersion()
         versionCode 1
         versionName "1.0"
     }

packages/ui-mobile-base/build.android.sh

@@ -6,6 +6,33 @@ set -e
 echo "Use dumb gradle terminal"
 export TERM=dumb
 
+# Prefer running with JDK 21 for Gradle 8.4+/AGP 8.3+
+if [ "$(uname)" = "Darwin" ]; then
+  # On macOS, prefer JDK 21, fall back to JDK 17
+  if /usr/libexec/java_home -v 21 >/dev/null 2>&1; then
+    export JAVA_HOME=$(/usr/libexec/java_home -v 21)
+    export PATH="$JAVA_HOME/bin:$PATH"
+    echo "Using Java (21) at $JAVA_HOME"
+    java -version 2>&1 | head -n 1
+  elif /usr/libexec/java_home -v 17 >/dev/null 2>&1; then
+    export JAVA_HOME=$(/usr/libexec/java_home -v 17)
+    export PATH="$JAVA_HOME/bin:$PATH"
+    echo "Using Java (17) at $JAVA_HOME"
+    java -version 2>&1 | head -n 1
+  else
+    echo "Warning: JDK 21 or 17 not found via /usr/libexec/java_home. Using current JAVA_HOME: ${JAVA_HOME:-unset}"
+    java -version 2>&1 || true
+    echo "Install JDK 21 (preferred) or JDK 17."
+  fi
+else
+  # Non-macOS: print Java version for visibility
+  if command -v java >/dev/null 2>&1; then
+    echo "Detected Java runtime: $(java -version 2>&1 | head -n 1)"
+  else
+    echo "Warning: 'java' not found on PATH. Build will likely fail."
+  fi
+fi
+
 rm -rf dist/package/platforms/android || true
 mkdir -p dist/package/platforms/android