NDK, CMake, and Android in TravisCI

Question

I\'m trying to set up my CI for a Android project that uses some C++ code. As such I need the NDK that doesn\'t come pre-installed on Travis Android images. I\'m currently

Answer 1

This is currently working for me:

install:
  - echo y | sdkmanager 'ndk-bundle'
  - echo y | sdkmanager 'cmake;3.6.4111459'
  - echo y | sdkmanager 'lldb;3.0'

My .travis.yml is available here.

Answer 2

I didn't try it but perhaps it's similar to the constraint library related issue.

As explained here and here, use a workaround to solve license issues or directly download it:

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"

In your case, check the correct version for cmake like here and here, cmake;3.6.4111459:

  - sdkmanager --list || true

  - echo yes | sdkmanager "cmake;3.6.4111459"

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
  - ./gradlew --version
  # Clean project and download missing dependencies and components
  - ./gradlew clean build

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

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-.+
    - '.+'

Before android script deprecation, you can accept all the licenses at the same time 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.
    - '.+'

I think that if you remove licenses section, 'white list all the licenses' - '.+' is applied by default.

Answer 3

Looks like the NDK samples use travis, maybe look there to see what's missing from your build: https://github.com/googlesamples/android-ndk/blob/master/.travis.yml