trying with java env

.travis.yml

@@ -1,10 +1,13 @@
-language: node_js
-node_js:
-  - "node"
+language: java
 
 jdk:
   - oraclejdk8
 
+env:
+  - NODE_VERSION=stable
+  - ANDROID_HOME=$HOME/android-sdk-linux
+  - PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
+
 git:
   depth: 3
 
@@ -18,7 +21,7 @@ cache:
     - $HOME/.gradle/caches/
     - $HOME/.gradle/wrapper/
     - $HOME/.m2
-    - $HOME/android-sdk-linux/licenses/
+    - $ANDROID_HOME/licenses/
 
 before_cache:
   - rm -rf $HOME/.gradle/caches/modules-2/modules-2.lock
@@ -26,10 +29,13 @@ before_cache:
 
 before_install:
   - set -e
-  - export ANDROID_HOME=$HOME/android-sdk-linux
-  - export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
   - ./scripts/clean.sh
 
+install:
+  - nvm install $NODE_VERSION
+  - npm i -g yarn
+  - yarn
+
 script:
   - yarn run lint
   - yarn run test:js