travis

.travis.yml

 language: android
-#### use android since there are android components####
-jdk:
-  - openjdk11
-os: linux
-dist: trusty
+sudo: required
+jdk: oraclejdk8
 
+env:
+  global:
+    - ANDROID_API_LEVEL=28
+    - ANDROID_BUILD_TOOLS_VERSION=28.0.3
+    - ANDROID_ABI=armeabi-v7a
 
 android:
   components:
@@ -13,21 +15,28 @@ android:
     - tools
     - extra-android-m2repository
   licenses:
-    - '.+'
     - 'android-sdk-preview-license-52d11cd2'
     - 'android-sdk-license-.+'
     - 'google-gdk-license-.+'
 
-
-before_script:
-  - chmod +x gradlew
-
-
 before_install:
   - touch $HOME/.android/repositories.cfg
   - yes | sdkmanager "platforms;android-28"
   - yes | sdkmanager "build-tools;28.0.3"
 
-script:
-  - ./gradlew clean build -i --continue
+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
+
+before_script:
+  - chmod +x gradlew
+
+script:
+  - ./gradlew clean build
+  - ./gradlew test
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