Create flutter.yml

Author: hoc081098

.github/workflows/flutter.yml

@@ -0,0 +1,26 @@
+name: Flutter
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-java@v1
+        with:
+          java-version: '12.x'
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: 'beta'
+      - run: dart --version
+      - run: flutter --version
+      - run: flutter pub get
+      - run: flutter packages pub run build_runner build --delete-conflicting-outputs
+      - run: flutter build apk
+