diff --git a/.github/workflows/android-build.yml b/.github/workflows/android-build.yml
new file mode 100644
index 000000000..9730e2e81
--- /dev/null
+++ b/.github/workflows/android-build.yml
@@ -0,0 +1,46 @@
+name: Build Android APK
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+    paths:
+      - 'android/**'
+      - '.github/workflows/android-build.yml'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Write google-services.json
+        run: |
+          echo '${{ secrets.GOOGLE_SERVICES_JSON }}' > android/app/google-services.json
+          echo "google-services.json written:"
+          head -5 android/app/google-services.json
+
+      - name: Grant execute permission for gradlew
+        working-directory: android
+        run: chmod +x gradlew
+
+      - name: Build Debug APK
+        working-directory: android
+        run: ./gradlew assembleDebug --no-daemon
+
+      - name: Upload APK artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: httpsms-debug-apk
+          path: android/app/build/outputs/apk/debug/*.apk
+          retention-days: 30