Add CI/CD

.github/workflows/gradle_build.yml

@@ -0,0 +1,49 @@
+name: Build APK
+
+on:
+  push:
+    branches: [ master, dev ]
+  pull_request:
+    branches: [ master, dev ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Configure SSH for private submodules
+        uses: webfactory/ssh-agent@v0.9.0
+        with:
+          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          repository: Botts-Innovative-Research/osh-android
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'zulu'
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Build APK
+        run: |
+          chmod +x ./gradlew
+          ./gradlew build -x test -x osgi -x lintDebug
+
+      - name: Upload APK artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: osh-android-APK
+          path: sensorhub-android-app/build/outputs/apk/debug/sensorhub-android-app-debug.apk
+
+      - name: Create GitHub Release
+        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: app/build/outputs/apk/basic/release/*.apk
+          generate_release_notes: true