Travis CI failed because cannot accept license Constrain Layout

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Updated response

is there any solution without workaround using export license?

Yes, you can use the new sdkmanager to install the constraint library and accept the license:

  - 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"

Otherwise, the missing component will be detected by gradle and downloaded without accept it:

  # Show version and download Gradle Wrapper if it's not already cached
  - cd ${TRAVIS_BUILD_DIR}/${DIR} && ./gradlew --version
  # Clean project and download missing dependencies and components
  - cd ${TRAVIS_BUILD_DIR}/${DIR} && ./gradlew clean build

In that case, as explained below, you need to accept the license the first time via the workaround.

Full working sample using constraint-layout codelab repository for Android API level 22 to 25:

language: android
jdk: oraclejdk8
sudo: required # false for Container-Based Infrastructure, required for Sudo-enabled Infrastructure

before_cache:
  - rm -f ${TRAVIS_BUILD_DIR}/gradle/caches/modules-2/modules-2.lock # Avoid to repack it due locks
  - rm -f ${TRAVIS_BUILD_DIR}/gradle/caches/3.3/classAnalysis/classAnalysis.lock
  - rm -f ${TRAVIS_BUILD_DIR}/gradle/caches/3.3/jarSnapshots/jarSnapshots.lock

cache:
  directories:
    - ${TRAVIS_BUILD_DIR}/gradle/caches/
    - ${TRAVIS_BUILD_DIR}/gradle/wrapper/dists/

notifications:
  email: false

android:
  components: # Cookbooks version: https://github.com/travis-ci/travis-cookbooks/tree/9c6cd11
    - tools # Update preinstalled tools from revision 24.0.2 to 24.4.1
    - build-tools-25.0.2 # Match build-tools version used in build.gradle
    - platform-tools # Update platform-tools to revision 25.0.3+
    - tools # Update tools from revision 24.4.1 to 25.2.5

env:
  global:
    - DIR=constraint-layout-start # Project directory
    - API=25 # Android API level 25 by default
    - TAG=google_apis # Google APIs by default, alternatively use default
    - ABI=armeabi-v7a # ARM ABI v7a by default
    - QEMU_AUDIO_DRV=none # Disable emulator audio to avoid warning
    - GRADLE_USER_HOME="${TRAVIS_BUILD_DIR}/gradle" # Change location for Gradle Wrapper and cache
    - ANDROID_HOME=/usr/local/android-sdk-24.0.2 # Depends on the cookbooks version used in the VM
    - TOOLS=${ANDROID_HOME}/tools # PATH order matters, exists more than one emulator script
    - PATH=${ANDROID_HOME}:${ANDROID_HOME}/emulator:${TOOLS}:${TOOLS}/bin:${ANDROID_HOME}/platform-tools:${PATH}
    - ADB_INSTALL_TIMEOUT=20 # minutes (2 minutes by default)

matrix:
  include: # More Emulator API levels to build in parallel
    - env: API=24
    - env: API=23
    - env: API=22
  allow_failures:
    - env: API=23
    - env: API=22
  fast_finish: false

before_install:
  - export EMULATOR="system-images;android-${API};${TAG};${ABI}" # Used to install/create emulator
  - echo 'count=0' > /home/travis/.android/repositories.cfg # Avoid warning

install:
  # List and delete unnecessary components to free space
  - sdkmanager --list || true
  - sdkmanager --uninstall "system-images;android-15;default;armeabi-v7a"
  - sdkmanager --uninstall "system-images;android-16;default;armeabi-v7a"
  - sdkmanager --uninstall "system-images;android-17;default;armeabi-v7a"
  - sdkmanager --uninstall "system-images;android-18;default;armeabi-v7a"
  - sdkmanager --uninstall "system-images;android-19;default;armeabi-v7a"
  - sdkmanager --uninstall "system-images;android-21;default;armeabi-v7a"
  - sdkmanager --uninstall "extras;google;google_play_services"
  - sdkmanager --uninstall "extras;android;support"
  - sdkmanager --uninstall "platforms;android-10"
  - sdkmanager --uninstall "platforms;android-15"
  - sdkmanager --uninstall "platforms;android-16"
  - sdkmanager --uninstall "platforms;android-17"
  - sdkmanager --uninstall "platforms;android-18"
  - sdkmanager --uninstall "platforms;android-19"
  - sdkmanager --uninstall "platforms;android-20"
  - sdkmanager --uninstall "platforms;android-21"
  - sdkmanager --uninstall "build-tools;21.1.2"
  # Update sdk tools to latest version and install/update components
  - echo yes | sdkmanager "tools"
  - echo yes | sdkmanager "platforms;android-25" # Latest platform required by SDK tools
  - echo yes | sdkmanager "platforms;android-${API}" # Android platform required by emulator
  - echo yes | sdkmanager "extras;android;m2repository"
  - echo yes | sdkmanager "extras;google;m2repository"
  - echo yes | sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2"
  - echo yes | sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout-solver;1.0.2"
  - echo yes | sdkmanager "$EMULATOR" # Install emulator system image
  # Create and start emulator
  - echo no | avdmanager create avd -n acib -k "$EMULATOR" -f --abi "$ABI" --tag "$TAG"
  - emulator -avd acib -engine classic -no-window -camera-back none -camera-front none -verbose -qemu -m 512 &
  # Start adbd, wait for device connected and show android serial
  - adb wait-for-device get-serialno
  # Show version and download Gradle Wrapper if it's not already cached
  - cd ${TRAVIS_BUILD_DIR}/${DIR} && ./gradlew --version
  # Clean project and download missing dependencies and components
  - cd ${TRAVIS_BUILD_DIR}/${DIR} && ./gradlew clean build
  # Check components status
  - sdkmanager --list || true

before_script:
  # Wait for emulator fully-booted and disable animations
  - android-wait-for-emulator
  - adb shell settings put global window_animation_scale 0 &
  - adb shell settings put global transition_animation_scale 0 &
  - adb shell settings put global animator_duration_scale 0 &
  - sleep 30
  - adb shell input keyevent 82 &

script:
  # Run all device checks
  - cd ${TRAVIS_BUILD_DIR}/${DIR} && ./gradlew connectedCheck

after_script:
  # Show tests and lint results
  - cat ${TRAVIS_BUILD_DIR}/${DIR}/*/build/outputs/androidTest-results/connected/*
  - cat ${TRAVIS_BUILD_DIR}/${DIR}/*/build/reports/lint-results.xml

Two more samples using sdkmanager and avdmanager without ${DIR} workaround:

References

Official documentation related to Auto-download missing packages with Gradle

The new Emulator options are explained in Start the Emulator from the Command Line

avdmanager explained here replaces android avd since SDK tools version 25.3.0

sdkmanager explained here also enhanced to view and accept all licenses from the command line

Previous response: Since sdkmanager replaces android script

I’m a little outdated about Travis-ci and seems extra work is required now, so it’s better you check:

In your .travis.yml file add:

before_install:
  - mkdir "$ANDROID_HOME/licenses" || true
  - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55" > "$ANDROID_HOME/licenses/android-sdk-license"
  - echo -e "\n84831b9409646a918e30573bab4c9c91346d8abd" > "$ANDROID_HOME/licenses/android-sdk-preview-license"

Do not forgot to accept all the licences on the main android object:

android:
  components:
    # ...
  licenses:
    - android-sdk-license-.+
    - '.+'

If you are getting “Please install the missing components using the
SDK manager in Android Studio.” error you can just install the missing
component with the sdkmanager command line tool:

echo y | sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.0-beta4"
echo y | sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout-solver;1.0.0-beta"

  • This article explaining contraint-layout problem for Circle-ci and Travis-ci

  • Documentation about sdkmanager provided in the Android SDK Tools package (25.2.3+)

Outdated solution: Before android script deprecation

I don’t use the default Travis-ci script to install Android components and accept licenses, from here:

# Install and update SDK
function install-and-update-sdk {
    # Keep SDK packages up-to-date (only missing suggested updates are installed).
    ( sleep 5 && while [ 1 ]; do sleep 1; echo y; done ) | android update sdk -u -t \
        ${UPDATE_PKGS:-'platform-tools,tools,extra-android-m2repository,extra-google-m2repository'}
    # Install or reinstall SDK packages (if empty, all packages are installed).
    ( sleep 5 && while [ 1 ]; do sleep 1; echo y; done ) | android update sdk -a -u -t \
        ${INSTALL_PKGS:-'build-tools-23.0.3,android-23'},${TARGET_PKGS:-}
}

You can accept all the licenses at the same time if you do it like this:

# THE SETUP STAGE
# ---------------
# If you comment out this section, Travis CI will install for you the components you define here.
# Check your project requirements and the components included by default on Travis-ci VM images.
# Check required: https://github.com/google/iosched/blob/master/doc/BUILDING.md
# Check defaults: http://docs.travis-ci.com/user/languages/android/#Pre-installed-components

android:
  components:
    # Check Android SDK tools: http://developer.android.com/tools/sdk/tools-notes.html
    # Check Android SDK Platform-tools: http://developer.android.com/tools/revisions/platforms.html
    # Comment the lines below if the latest revisions of Android SDK Tools are included by default.
    # - tools
    # - platform-tools
    # ...
  licenses:
    # Check licenses: http://docs.travis-ci.com/user/languages/android/#Dealing-with-Licenses
    # By default Travis will accept all the licenses, but it's also possible to define a white list:
    # White list current android-sdk-license revision.
    # - 'android-sdk-license-5be876d5'
    # White list all android-sdk-license revisions.
    # - 'android-sdk-license-.+'
    # White list all the licenses.
    - '.+'

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