try

.github/workflows/flutter-example.yml

@@ -15,9 +15,9 @@ on:
       - 'example/**'
       - '!example/README.md'
 
-# defaults:
-#   run:
-#     working-directory: example
+defaults:
+  run:
+    working-directory: example
 
 jobs:
   build-android:
@@ -26,6 +26,7 @@ jobs:
     strategy:
       matrix:
         flutter-version: ['2.8.1', '3.0.4']
+        gradle-version: ['7.5', '8.2']
 
     steps:
     - uses: actions/checkout@v3
@@ -43,19 +44,17 @@ jobs:
 
     - uses: gradle/actions/setup-gradle@v3
       with:
-        gradle-version: 8.2
+        gradle-version: ${{ matrix.gradle-version }}
 
     - name: Install dependencies
       run: flutter pub get
-      working-directory: example
 
-    - name: Install dependencies
-      run: ./gradlew --version
-      working-directory: android
+    - name: Generate gradle wrapper
+      run: gradle wrapper --gradle-version ${{ matrix.gradle-version }} --distribution-type all
+      working-directory: example/android
 
     - name: Build
       run: flutter build apk
-      working-directory: example
 
   # build-ios:
   #   name: Build iOS demo