Yet another attempt

.travis.yml

@@ -1,13 +1,36 @@
 language: android
-jdk:
-  - oraclejdk8
+sudo: required
+jdk: oraclejdk8
+
+cache:
+  directories:
+    - ${TRAVIS_BUILD_DIR}/gradle/caches/
+    - ${TRAVIS_BUILD_DIR}/gradle/wrapper/dists/
+
+env:
+  global:
+    - ANDROID_API_LEVEL=24
+    - ANDROID_BUILD_TOOLS_VERSION=24.0.3
+    - ANDROID_ABI=armeabi-v7a
+    - ANDROID_TAG=google_apis
+    - ADB_INSTALL_TIMEOUT=20 # minutes (2 minutes by default)
+
 android:
   components:
     - tools # to get the new `repository-11.xml`
     - tools # see https://github.com/travis-ci/travis-ci/issues/6040#issuecomment-219367943)
     - platform-tools
-    - build-tools-24.0.2
-    - android-24
+    - build-tools-$ANDROID_BUILD_TOOLS_VERSION
+    - android-$ANDROID_API_LEVEL
     - extra-google-m2repository
+    - sys-img-armeabi-v7a-google_apis-$ANDROID_API_LEVEL
+
+before_script:
+  # Create and start emulator
+  - echo no | android create avd --force -n test -t "android-"$ANDROID_API_LEVEL --abi $ANDROID_ABI --tag $ANDROID_TAG
+  - emulator -avd test -no-skin -no-window &
+  - android-wait-for-emulator
+  - adb shell input keyevent 82 &
+
 script:
-   - ./gradlew build connectedCheck
+   - ./gradlew clean jacocoDebugTestReport