ci: add Android Build github action

.github/workflows/android_build.yml

@@ -0,0 +1,79 @@
+name: Android Build ## name of the workflow
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  android-build:
+    name: Android Build
+    runs-on: ubuntu-latest # using ubuntu latest version / or you can use a specific version
+
+    steps:
+      - name: Check out Git repository # clone the repo to local ci workspace
+        uses: actions/checkout@v2
+
+      - name: Set up our JDK environment # setup JDK environment: mandatory as we need to build  android project
+        uses: actions/[email protected]
+        with:
+          java-version: 1.8
+
+      - name: Install dependencies 
+        run: npm ci 
+
+      # configure cash for gradle : will help to reduce build time
+      - name: Cache Gradle Wrapper
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
+
+      - name: Cache Gradle Dependencies
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-caches-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-caches-
+      - name: Make Gradlew Executable
+        run: cd android && chmod +x ./gradlew
+
+      - name: Generate App APK
+        run: |
+          cd android && ./gradlew assembleRelease --no-daemon
+
+      ## sign generated apk
+      - name: Sign APK
+        id: sign_app
+        uses: r0adkll/sign-android-release@v1
+        with:
+          releaseDirectory: android/app/build/outputs/apk/release
+          signingKeyBase64: ${{ secrets.MYAPP_UPLOAD_STORE_FILE_BASE64 }}
+          alias: ${{ secrets.MYAPP_UPLOAD_KEY_ALIAS }}
+          keyStorePassword: ${{ secrets.MYAPP_UPLOAD_STORE_PASSWORD }}
+          keyPassword: ${{ secrets.MYAPP_UPLOAD_KEY_PASSWORD }}
+
+      - name: Changelog
+        run: |          
+          git config --local user.email "[email protected]"
+          git config --local user.name "xianshenglu"
+          npm run changelog
+          git push --follow-tags 
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: ${{steps.sign_app.outputs.signedReleaseFile}}
+
+
+
+      ## Distribute app to Firebase App Distribution for testing / use google play internal track if you have a google play account
+      # - name: upload artifact to Firebase App Distribution
+      #   uses: wzieba/Firebase-Distribution-Github-Action@v1
+      #   with:
+      #     appId: ${{secrets.ANDROID_FIREBASE_APP_ID}}
+      #     token: ${{secrets.ANDROID_FIREBASE_TOKEN}}
+      #     groups: testers
+      #     file: ${{steps.sign_app.outputs.signedReleaseFile}}