More poking at Travis

.travis.yml

@@ -1,11 +1,16 @@
 language: android
 jdk: oraclejdk8
-sudo: required
+sudo: false
 
 cache:
   directories:
     - ${TRAVIS_BUILD_DIR}/gradle/caches/
     - ${TRAVIS_BUILD_DIR}/gradle/wrapper/dists/
+    - $HOME/.gradle/caches/3.5
+    - $HOME/.gradle/caches/jars-1
+    - $HOME/.gradle/daemon
+    - $HOME/.gradle/native
+    - $HOME/.gradle/wrapper
 
 env:
   matrix:
@@ -30,13 +35,15 @@ android:
     - extra-google-m2repository
 
 before_script:
-  - echo no | android create avd --force -n test -t android-$EMULATOR_SDK_LEVEL --abi $ABI
-  - emulator -avd test -no-audio -no-window &
+  - echo no | android create avd --force --name test --target $EMULATOR_SDK_LEVEL --abi $ABI
+  - emulator -avd test -no-audio -no-window &
+  - ./gradlew check -PdisablePreDex --continue --stacktrace
   - android-wait-for-emulator
-  - adb shell input keyevent 82 &
+  - adb devices
+  - adb shell input keyevent 82 &
 
 script:
-  - travis_wait 60 ./gradlew clean jacocoDebugTestReport --stacktrace
+  - travis_wait 60 ./gradlew clean jacocoDebugTestReport -PdisablePreDex --stacktrace
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)