Android travis

Summary: Closes https://github.com/facebook/Sonar/pull/136

Reviewed By: danielbuechele

Differential Revision: D8735101

Pulled By: priteshrnandgaonkar

fbshipit-source-id: 648756cf67f07abb6e0c80b677fa01bf5c5085b7

.travis.yml

@@ -60,3 +60,38 @@ matrix:
         - cd iOS/Sample
         - xcodebuild -showsdks
         - xcodebuild clean build -workspace Sample.xcworkspace -scheme Pods-Sample -sdk iphonesimulator11.4
+
+    - language: android
+      os: linux
+      android:
+        components:
+          - tools
+          - platform-tools
+          - build-tools-27.0.3
+          - android-27
+          - extra-google-google_play_services
+          - extra-google-m2repository
+          - extra-android-m2repository
+          - addon-google_apis-google-27
+
+        licenses:
+          - android-sdk-preview-license-.+
+          - android-sdk-license-.+
+          - google-gdk-license-.+
+      before_install:
+        - yes | sdkmanager "platforms;android-27"
+        - echo "y" | sdkmanager "cmake;3.6.4111459"
+        - wget https://dl.google.com/android/repository/android-ndk-r17b-linux-x86_64.zip
+        - mkdir -p temp-android-ndk
+        - mv ./android-ndk-r17b-linux-x86_64.zip temp-android-ndk
+        - cd temp-android-ndk
+        - unzip android-ndk-r17b-linux-x86_64.zip
+        - export ANDROID_NDK_HOME=`pwd`/android-ndk-r17b
+        - export PATH=${PATH}:${ANDROID_NDK_HOME}
+        - cd ../
+      script:
+        - ./gradlew :sample:build
+      after_success:
+        - rm -rf temp-android-ndk
+      after_failure:
+        - rm -rf temp-android-ndk