Use gradle-managed devices for testing

.github/workflows/test-dev.yml

@@ -27,9 +27,6 @@ jobs:
   test_on_emulator:
     name: Tests with emulator
     runs-on: ubuntu-latest-4-cores
-    strategy:
-      matrix:
-        api-level: [ 31 ]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4
@@ -44,35 +41,16 @@ jobs:
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
 
-      - name: Cache AVD and APKs
+      - name: Cache AVD
         uses: actions/cache@v4
-        id: avd-cache
         with:
           path: |
-            ~/.android/avd/*
+            ~/.android/avd
             ~/.android/adb*
-          key: avd-${{ matrix.api-level }}
+          key: avd-${{ hashFiles('lib/build.gradle.kts') }}   # gradle-managed devices are defined there
 
-      - name: Create AVD and generate snapshot for caching
-        if: steps.avd-cache.outputs.cache-hit != 'true'
-        uses: reactivecircus/android-emulator-runner@v2
-        with:
-          api-level: ${{ matrix.api-level }}
-          arch: x86_64
-          force-avd-creation: false
-          emulator-options: -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
-          disable-animations: false
-          script: echo "Generated AVD snapshot for caching."
-
-      - name: Run tests
-        uses: reactivecircus/android-emulator-runner@v2
-        with:
-          api-level: ${{ matrix.api-level }}
-          arch: x86_64
-          force-avd-creation: false
-          emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
-          disable-animations: true
-          script: ./gradlew --no-daemon connectedCheck
+      - name: Run device tests
+        run: ./gradlew --no-daemon virtualCheck
 
       - name: Archive results
         uses: actions/upload-artifact@v4

lib/build.gradle.kts

@@ -53,6 +53,19 @@ android {
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    @Suppress("UnstableApiUsage")
+    testOptions {
+        managedDevices {
+            localDevices {
+                create("virtual") {
+                    device = "Pixel 3"
+                    apiLevel = 33
+                    systemImageSource = "aosp-atd"
+                }
+            }
+        }
+    }
+
     publishing {
         // Configure publish variant
         singleVariant("release") {