ci: init ci

.github/workflows/android_ci.yml

@@ -0,0 +1,49 @@
+name: Android CI
+
+on:
+  push:
+    branches: 
+      - *
+  pull_request:
+    branches:
+      - *
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Get current time
+      uses: 1466587594/get-current-time@v2
+      id: current-time
+      with:
+        format: YYYYMMDD-HH
+        utcOffset: "+08:00"
+    - uses: actions/checkout@v3
+    - name: set up JDK 11
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+        distribution: 'adopt'
+        cache: gradle
+    
+    - uses: dart-lang/setup-dart@9a04e6d73cca37bd455e0608d7e5092f881fd603
+      name: Install dart depenedncies
+      run: flutter pub get
+
+    - name: Decode Keystore
+      env:
+        ENCODED_STRING: ${{ secrets.SIGNING_STORE_BASE64 }}
+      run: echo $ENCODED_STRING | base64 -di > app/keystore.jks
+    
+    - name: Build apk
+      run: flutter build android release
+      env:
+          SIGNING_KEY_ALIAS: ${{ secrets.SIGNING_KEY_ALIAS }}
+          SIGNING_KEY_PASSWORD: ${{ secrets.SIGNING_KEY_PASSWORD }}
+          SIGNING_STORE_PASSWORD: ${{ secrets.SIGNING_STORE_PASSWORD }}
+    - name: Upload artifact
+      with: 
+        name: app-release.${{ steps.current-time.outputs.formattedTime }}
+        path: android/app/release/*.apk