Build maui.aar on CI

eng/cake/dotnet.cake

@@ -95,8 +95,29 @@ Task("dotnet-buildtasks")
         throw exception;
     });
 
+Task("android-aar")
+    .Does(() =>
+    {
+        var root = "./src/Core/AndroidNative/";
+
+        var gradlew = root + "gradlew";
+        if (IsRunningOnWindows())
+            gradlew += ".bat";
+
+        var exitCode = StartProcess(
+            MakeAbsolute((FilePath)gradlew),
+            new ProcessSettings
+            {
+                Arguments = $"createAar --rerun-tasks",
+                WorkingDirectory = root
+            });
+        if (exitCode != 0)
+            throw new Exception("Gradle failed to build maui.aar: " + exitCode);
+    });
+
 Task("dotnet-build")
     .IsDependentOn("dotnet")
+    .IsDependentOn("android-aar")
     .Description("Build the solutions")
     .Does(() =>
     {
@@ -270,6 +291,7 @@ Task("dotnet-test")
     });
 
 Task("dotnet-pack-maui")
+    .IsDependentOn("android-aar")
     .WithCriteria(RunPackTarget())
     .Does(() =>
     {

eng/pipelines/common/provision.yml

@@ -53,6 +53,7 @@ steps:
     # Setup JDK Paths
     - bash: |
         echo "##vso[task.setvariable variable=JI_JAVA_HOME]$(JAVA_HOME_11_X64)"
+        echo "##vso[task.setvariable variable=JAVA_HOME]$(JAVA_HOME_11_X64)"
       displayName: 'Setup JDK Paths'
     # Configure VS Mac for Xcode
     - bash: |
@@ -121,6 +122,39 @@ steps:
         env:
           PROVISIONATOR_CHANNEL: ${{ parameters.provisionatorChannel }}
 
+    - pwsh: |
+        if ($env:JAVA_HOME_11_X64) {
+          $env:JAVA_HOME = $env:JAVA_HOME_11_X64
+        } else {
+          $path = (Get-ChildItem $env:ProgramFiles\Microsoft\jdk-11.*\bin\java.exe) | Select-Object -First 1
+          if ($path -and (Test-Path $path)) {
+            $env:JAVA_HOME = $path.Directory.Parent.FullName
+          }
+        }
+        if ($env:JAVA_HOME) {
+          echo "##vso[task.setvariable variable=JAVA_HOME]$env:JAVA_HOME"
+          echo "JAVA_HOME set to '$env:JAVA_HOME'"
+        } else {
+          echo "Unable to set JAVA_HOME"
+        }
+      displayName: 'Setup JDK Paths'
+
+    - pwsh: |
+        if ($env:ANDROID_SDK_ROOT) {
+          echo "ANDROID_SDK_ROOT already set to '$env:ANDROID_SDK_ROOT'"
+        } else {
+          if ((Test-Path "${env:ProgramFiles(x86)}\Android\android-sdk")) {
+            $env:ANDROID_SDK_ROOT = "${env:ProgramFiles(x86)}\Android\android-sdk"
+          }
+          if ($env:ANDROID_SDK_ROOT) {
+            echo "##vso[task.setvariable variable=ANDROID_SDK_ROOT]$env:ANDROID_SDK_ROOT"
+            echo "ANDROID_SDK_ROOT set to '$env:ANDROID_SDK_ROOT'"
+          } else {
+            echo "Unable to set ANDROID_SDK_ROOT"
+          }
+        }
+      displayName: 'Setup ANDROID_SDK_ROOT Paths'
+
   # Prepare Both
   - task: UseDotNet@2                 # https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/tool/dotnet-core-tool-installer?view=azure-devops
     displayName: 'Use .NET SDK 7'