How should I configure Travis-CI for an Android library?

Question

I am developing an Android library (RateMyApp, which you can find on GitHub) but I can't see how I should setup Travis CI to build it every time I push new code.

The .travis.yml file I am using is the following:

language: java
script:
    - gradle bundleRelease

but it seems to be ignored because gradle bundleRelease is never invoked. Instead I get the following output that suggests me that gradle assemble is invoked instead.

Using worker: worker-linux-8-1.bb.travis-ci.org:travis-linux-5

travis_fold:start:git.1
$ git clone --depth=50 --branch=master git://github.com/mariosangiorgio/RateMyApp.git
[...]
mariosangiorgio/RateMyApp
Cloning into 'mariosangiorgio/RateMyApp'...
done.
travis_fold:end:git.1    
$ cd mariosangiorgio/RateMyApp
travis_fold:start:git.3
$ git checkout -qf 90faf4539c835136895ea92dd2bcc7da12ad1145
travis_fold:end:git.3
$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
$ javac -version
javac 1.7.0_45
travis_fold:start:install
$ gradle assemble
[...]
The command "gradle assemble" failed and exited with 1 during install.

Your build has been stopped.

I read the page linked in the documentation but unfortunately it wasn't much helpful to me.

Answer 1

Here is mine yaml file which is building apk. But it should work also for library.

language: java
jdk: oraclejdk7
branches:
  only:
    - master
before_install:
  - chmod +x gradlew
  # Install base Android SDK
  - sudo apt-get update -qq
  - if [ `uname -m` = x86_64 ]; then sudo apt-get install -qq --force-yes libgd2-xpm ia32-libs ia32-libs-multiarch > /dev/null; fi
  - wget http://dl.google.com/android/android-sdk_r22.0.5-linux.tgz
  - tar xzf android-sdk_r22.0.5-linux.tgz
  - export ANDROID_HOME=$PWD/android-sdk-linux
  - export PATH=${PATH}:${ANDROID_HOME}/tools:${ANDROID_HOME}/platform-tools
  # install android build tools
  - wget https://dl-ssl.google.com/android/repository/build-tools_r19.0.1-linux.zip
  - unzip build-tools_r19.0.1-linux.zip -d $ANDROID_HOME
  - mkdir -p $ANDROID_HOME/build-tools/
  - mv $ANDROID_HOME/android-4.4.2 $ANDROID_HOME/build-tools/19.0.1
  # Install required components.
  - echo yes | android update sdk --filter platform-tools --no-ui --force > /dev/null
  - echo yes | android update sdk --filter android-19 --no-ui --force > /dev/null
  - echo yes | android update sdk --filter extra-android-support --no-ui --force > /dev/null
  - echo yes | android update sdk --filter extra-android-m2repository --no-ui --force > /dev/null
install:
  - true
script:
  - TERM=dumb ./gradlew test assembleDebug

But be careful since this script doesn't push built artefact anywhere

Answer 2

I use an SDK installer script in the .travis.yml for Hilt.

language: java
jdk: oraclejdk7
before_install:
    # Install base Android SDK and components
    - sudo apt-get update -qq
    - sudo apt-get install -qq libstdc++6:i386 lib32z1 expect
    - export COMPONENTS=build-tools-19.0.3,android-19,extra-android-support,extra-android-m2repository,extra-google-m2repository
    - export LICENSES=android-sdk-license-bcbbd656
    - curl -3L https://raw.github.com/embarkmobile/android-sdk-installer/version-2/android-sdk-installer | bash /dev/stdin --install=$COMPONENTS --accept=$LICENSES
    - source ~/.android-sdk-installer/env

install:
    # Without TERM=dumb, we get mangled output in the Travis console
    - TERM=dumb ./gradlew clean assemble -PdisablePreDex

script:
    - TERM=dumb ./gradlew check -PdisablePreDex

EDIT: Travis-CI has implemented Android as a first class citizen - http://blog.travis-ci.com/2014-05-07-android-build-support-now-in-beta/