Updated CI configurations.

.gitlab-ci.yml

@@ -0,0 +1,31 @@
+image: gradle:alpine
+
+variables:
+  GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+
+before_script:
+  - export GRADLE_USER_HOME=`pwd`/.gradle
+
+stages:
+  - build
+  - test
+
+build:
+  stage: build
+  script: ./gradlew --build-cache assemble
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: push
+    paths:
+      - build
+      - .gradle
+
+test:
+  stage: test
+  script: ./gradlew check
+  cache:
+    key: "$CI_COMMIT_REF_NAME"
+    policy: pull
+    paths:
+      - build
+      - .gradle

.travis.yml

@@ -1,10 +1,6 @@
 language: java
 dist: trusty
 
-env:
-  global:
-    - CI=true
-
 jdk:
   - oraclejdk8
 

bitbucket-pipelines.yml

@@ -0,0 +1,9 @@
+image: openjdk:8
+
+pipelines:
+  default:
+    - step:
+        caches:
+          - gradle
+        script:
+          - bash ./gradlew check