build_release_apk.yml

# This is a basic workflow to help you get started with Actions

name: Build Release APK

# Controls when the action will run. 
on:
  # Triggers the workflow on push or pull request events but only for the master branch
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2
      
      - name: Make Gradle executable
        run: chmod +x ./gradlew
      - name: Build Release APK
        run: ./gradlew assembleRelease

      - uses: r0adkll/sign-android-release@v1.0.4
        name: Sign app APK
        # ID used to access action output
        id: sign_app
        with:
          releaseDirectory: app/build/outputs/apk/release
          signingKeyBase64: ${{ secrets.SIGNING_KEY }}
          alias: ${{ secrets.ALIAS }}
          keyStorePassword: ${{ secrets.KEY_STORE_PASSWORD }}
          keyPassword: ${{ secrets.KEY_PASSWORD }}
        env:
          BUILD_TOOLS_VERSION: "30.0.2"
      
      # Example use of `signedReleaseFile` output -- not needed
      - uses: actions/upload-artifact@v2
        with:
          name: Upload signed app bundle
          path: ${{steps.sign_app.outputs.signedReleaseFile}}