Travis CI build doesn't work with Android Constraint Layout

Question

I am trying to make Travis build my Android project. It fails when it tries to download the library for ConstraintLayout. Do you know what I have to do to make it work?

My .travis.yml is this:

language: android
jdk:
  - oraclejdk8
android:
  components:
    - platform-tools
    - tools
    - build-tools-23.0.2
    - android-23
    - extra-android-support
    - extra-android-m2repository
    - extra-google-m2repository

My build.gradle is:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    defaultConfig {
        applicationId "my.example.bdd"
        minSdkVersion 9
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha2'
    testCompile 'junit:junit:4.12'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
    androidTestCompile 'com.android.support.test:runner:0.5'
    androidTestCompile 'com.android.support:support-annotations:23.4.0'
}

And the error I get on Travis is:

FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_debugApk'.
   > Could not find com.android.support.constraint:constraint-layout:1.0.0-alpha2.
     Searched in the following locations:
         https://jcenter.bintray.com/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.pom
         https://jcenter.bintray.com/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.jar
         file:/usr/local/android-sdk/extras/android/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.pom
         file:/usr/local/android-sdk/extras/android/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.jar
         file:/usr/local/android-sdk/extras/google/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.pom
         file:/usr/local/android-sdk/extras/google/m2repository/com/android/support/constraint/constraint-layout/1.0.0-alpha2/constraint-layout-1.0.0-alpha2.jar

Any idea how to fix this? Is it even possible to build ConstraintLayout with Travis?

Answer 1

After the new release of the Support Library version 25.0.0, the Constraint Layout Alpha1 library apparently doesn't work anymore on TravisCI. Using that version was the only workaround at the moment.

Now I found a new workaround to use the new Alpha9 version. 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:

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