Update travis.yml

.travis.yml

@@ -1,31 +1,45 @@
+language: android
+jdk: oraclejdk8
+# Use the Travis Container-Based Infrastructure
+sudo: false
+
+cache:
+  directories:
+    - ${TRAVIS_BUILD_DIR}/gradle/caches/
+    - ${TRAVIS_BUILD_DIR}/gradle/wrapper/dists/
+
 env:
   global:
     - ANDROID_API_LEVEL=24
     - ANDROID_BUILD_TOOLS_VERSION=24.0.3
     - ANDROID_ABI=armeabi-v7a
     - ANDROID_TAG=google_apis
-language: android
-jdk:
-  - oraclejdk8
+    - ADB_INSTALL_TIMEOUT=20 # minutes (2 minutes by default)
+
 android:
   components:
     - tools # to get the new `repository-11.xml`
-    - tools # see https://github.com/travis-ci/travis-ci/issues/6040#issuecomment-219367943)
-    - platform-tool
+    - platform-tools
+    - tools # to install Android SDK tools 25.1.x
     - build-tools-$ANDROID_BUILD_TOOLS_VERSION
     - android-$ANDROID_API_LEVEL
+    # For Google APIs
+    - addon-google_apis-google-$ANDROID_API_LEVEL
+    # Google Play Services
+    - extra-google-google_play_services
+    # Support library
+    - extra-android-support
+    # Latest artifacts in local repository
+    - extra-google-m2repository
     - extra-android-m2repository
+    # Specify at least one system image
     - sys-img-armeabi-v7a-google_apis-$ANDROID_API_LEVEL
 
-before_install:
-  - export JAVA8_HOME=/usr/lib/jvm/java-8-oracle
-  - export JAVA_HOME=$JAVA8_HOME
-
-script:
-  - ./gradlew clean jacocoDebugTestReport
-
 before_script:
-  - echo no | android create avd --force -n test -t android-$ANDROID_API_LEVEL --abi $ANDROID_ABI --tag $ANDROID_TAG
-  - emulator -avd test -no-skin -no-audio -no-window &
+  # Create and start emulator
+  - echo no | android create avd --force -n test -t "android-"$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 clean jacocoDebugTestReport