Simplified build workflow

.github/workflows/gradle.yml

@@ -1,7 +1,7 @@
 # This workflow will build a Java project with Gradle
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
 
-name: Java CI with Gradle
+name: Android CI
 
 on:
   push:
@@ -15,36 +15,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - name: Checkout source code
+      uses: actions/checkout@v2
 
     - name: Set up JDK 11
       uses: actions/setup-java@v2
       with:
         java-version: '11'
-        distribution: 'adopt' # Adopt OpenJDK
-
-    - name: Validate Gradle wrapper    
-      uses: gradle/wrapper-validation-action@v1
-
-    - name: Cache Gradle packages
-      uses: actions/cache@v2
-      with:
-        path: |
-          ~/.gradle/caches
-          ~/.gradle/wrapper
-        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-        restore-keys: |
-          ${{ runner.os }}-gradle-
+        distribution: 'adopt'
+        cache: gradle
 
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
 
     - name: Build with Gradle
       run: ./gradlew build
-
-    - name: Cleanup Gradle Cache
-      # Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
-      # Restoring these files from a GitHub Actions cache might cause problems for future builds.
-      run: |
-        rm -f ~/.gradle/caches/modules-2/modules-2.lock
-        rm -f ~/.gradle/caches/modules-2/gc.properties