android demo action (#44)

.github/workflows/android-demos.yml

@@ -0,0 +1,35 @@
+name: Android Demos
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+    paths:
+      - '.github/workflows/android-demos.yml'
+      - 'demo/android/**'
+      - '!demo/android/EagleDemo/README.md'
+  pull_request:
+    branches: [ main, 'v[0-9]+.[0-9]+' ]
+    paths:
+      - '.github/workflows/android-demos.yml'
+      - 'demo/android/**'
+      - '!demo/android/EagleDemo/README.md'
+
+jobs:
+  build-eagle-demo:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: demo/android/EagleDemo
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: set up JDK 11
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+
+    - name: Build
+      run: ./gradlew assembleDebug