ci: add Android build workflow for debug APK and release AAB

.gitea/workflows/android-build.yml

@@ -0,0 +1,50 @@
+name: Android build
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Java 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '17'
+          cache: gradle
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Make Gradle wrapper executable
+        run: chmod +x gradlew
+
+      - name: Build debug APK
+        run: ./gradlew --no-daemon clean assembleDebug
+
+      - name: Build release AAB
+        run: ./gradlew --no-daemon bundleRelease
+
+      - name: Upload debug APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: debug-apk
+          path: app/build/outputs/apk/debug/*.apk
+          if-no-files-found: error
+
+      - name: Upload release AAB
+        uses: actions/upload-artifact@v4
+        with:
+          name: release-aab
+          path: app/build/outputs/bundle/release/*.aab
+          if-no-files-found: error