Inspired by https://github.com/r0adkll/sign-android-release
This action will help you sign an Android .apk or .aab (Android App Bundle) file for release.

Required: The relative directory path in your project where your Android release file will be located, it can be an array.

Required: The base64 encoded signing key used to sign your app

This action will directly decode this input to a file to sign your release with. You can prepare your key by running this command on *nix systems.

openssl base64 < some_signing_key.jks | tr -d '\n' | tee some_signing_key.jks.base64.txt

Then copy the contents of the .txt file to your GH secrets

Required: The alias of your signing key

Required: The password to your signing keystore

Optional: The private key password for your signing keystore

Optional: The working directory for action, default to build

Optional: The output directory for sign, default to build/signed

Optional: You can manually specify a version of build-tools to use. We use 30.0.2 by default.

steps:
  # ...

  - uses: Tlaster/android-sign@v1
    name: Sign app APK
    with:
      releaseDirectory: |
        app/build/outputs/apk/release
        app/build/outputs/bundle/release
      signingKeyBase64: ${{ secrets.SIGNING_KEY }}
      output: build/release/signed
      alias: ${{ secrets.ALIAS }}
      keyStorePassword: ${{ secrets.KEY_STORE_PASSWORD }}
      keyPassword: ${{ secrets.KEY_PASSWORD }}
    env:
      BUILD_TOOLS_VERSION: "30.0.2"