Integrate Travis CI

.travis.yml

@@ -0,0 +1,52 @@
+language: android
+
+sudo: false
+
+jdk:
+  - oraclejdk8
+
+env:
+  global:
+    - ANDROID_API=28
+    - ANDROID_BUILD_TOOLS=28.0.3
+    - EMULATOR_API_LEVEL=24
+
+before_cache:
+  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+
+cache:
+  directories:
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/
+    - $HOME/.android/build-cache
+
+android:
+  components:
+    - android-$ANDROID_API
+    - android-$EMULATOR_API_LEVEL
+    - build-tools-$ANDROID_BUILD_TOOLS
+    - tools
+    - platform-tools
+    - extra-google-m2repository
+    - extra-google-google_play_services
+    - extra-android-m2repository
+    - sys-img-armeabi-v7a-android-$EMULATOR_API_LEVEL
+
+before_script:
+  - echo no | android create avd --force -n test --target android-$EMULATOR_API_LEVEL --abi armeabi-v7a
+  - emulator -avd test -noskin -no-boot-anim -no-window &
+  - android-wait-for-emulator
+  - adb shell input keyevent 82
+
+script:
+  - ./gradlew check connectedCheck --stacktrace
+  - ./gradlew ktlint
+
+deploy:
+  provider: script
+  script: ./gradlew imageclassification:clean :imageclassification:assembleRelease :imageclassification:bintrayUpload
+  skip_cleanup: true
+  dry-run: false
+  on:
+    branch: release