Android .gitlab-ci.yml Gitlab CI/CD example file

.gitlab-ci.yml

image: openjdk:8-jdk

variables:
  ANDROID_COMPILE_SDK: "28"
  ANDROID_BUILD_TOOLS: "29.0.0-rc2"
  ANDROID_SDK_TOOLS: "26.1.1" # only to register, because since some version, the link to download does not follow a pattern with the desired SDK version
  APP_NAME: "MyProject"

before_script:
- apt-get --quiet update --yes
- apt-get --quiet install --yes wget tar unzip lib32stdc++6 lib32z1
- wget --output-document=android-sdk.tgz https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip
- mkdir android-sdk-linux && unzip android-sdk.tgz -d android-sdk-linux
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "platform-tools"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "platforms;android-${ANDROID_COMPILE_SDK}"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "build-tools;${ANDROID_BUILD_TOOLS}"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "tools"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "extras;android;m2repository"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "extras;google;google_play_services"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "extras;google;m2repository"
- echo y | ./android-sdk-linux/tools/bin/sdkmanager "ndk-bundle"
- export ANDROID_HOME=$PWD/android-sdk-linux
- export PATH=$PATH:$PWD/android-sdk-linux/platform-tools/
- chmod +x ./gradlew

stages:
- build
- lint
- test
- package

.build_template: &build
  stage: build
  artifacts:
    expire_in: 8 hours
    paths:
    - app/build/outputs/

build:release:
  <<: *build
  script:
  - ./gradlew assembleRelease -PversionCode=$VERSION_CODE -PversionName=$VERSION_NAME

lint:
  stage: lint
  script:
  - ./gradlew lint

########################################################################
# TESTS

.test_template: &test
  stage: test
  only:
  - master

test:unit:
  <<: *test
  script:
  - ./gradlew test

# TODO: add functional (Espresso) tests config in the future

########################################################################
# PACKAGE

.package_template: &package
  before_script:
  - mkdir -p exported

# TODO: explicit package:release:unsigned and package:release:signed in the future
package:release:
  <<: *package
  stage: package
  environment: Release
  script:
  - mv app/build/outputs/apk/release/app-release.apk ./exported/${APP_NAME}-$VERSION_NAME-release.apk
  dependencies:
  - build:release
  artifacts:
    paths:
    - exported

Thanks to this tutorial https://medium.com/@NickKaramoff/gitlab-ci-setup-for-an-android-app-3ba57b369b5f