.travis.yml

language: android

before_install:
 - chmod +x gradlew

install:
  - echo yes | sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2"
  - echo yes | sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout-solver;1.0.2"

 android:
  components:
    # Uncomment the lines below if you want to
    # use the latest revision of Android SDK Tools
    - tools
    - platform-tools

    # The BuildTools version used by your project
    - build-tools-28.0.0

    # The SDK version used to compile your project
    - android-28

    # Additional components
    # - extra-google-google_play_services
    # - extra-google-m2repository
    # - extra-android-m2repository
    # - addon-google_apis-google-26

    # Specify at least one system image,
    # if you need to run emulator(s) during your tests
    # - sys-img-armeabi-v7a-android-25
    # - sys-img-armeabi-v7a-android-17