Build and Upload generated apk as artifact with GitHub Actions

flutter_build.yml

name: Flutter Build

on:
  push:
    branches: [ develop ]
  pull_request:
     branches: [ develop ]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - name: Setting up Flutter SDK
        uses: subosito/flutter-action@v1
        with:
          channel: stable

      - name: Fetch Packages
        run: flutter pub get
      
      - name: Generate files
        run: flutter packages pub run build_runner build --delete-conflicting-outputs

      - name: Build APK
        run: flutter build apk --debug -v

      - name: Upload APK
        uses: actions/upload-artifact@v2.2.0
        with:
          name: MyApp
          path: build/app/outputs/flutter-apk/app-debug.apk
          retention-days: 5