Update .travis.yml

Author: aminyazdanpanah

.travis.yml

@@ -1,47 +1,34 @@
 language: android
 jdk: oraclejdk8
-cache: false
+# 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=25
-    - ANDROID_BUILD_TOOLS_VERSION=25.0.2
-    - ANDROID_ABI=armeabi-v7a
-    - ANDROID_TAG=google_apis
-    - EMULATOR_API_LEVEL=25
-    - ADB_INSTALL_TIMEOUT=20
+    - ANDROID_BUILD_TOOLS_VERSION=25.0.1
 
 android:
   components:
+    - tools # to get the new `repository-11.xml`
     - platform-tools
-    - 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-$ANDROID_API_LEVEL
+    # Google Play Services
     - extra-google-google_play_services
+    # Support library
     - extra-android-support
+    # Latest artifacts in local repository
     - extra-google-m2repository
     - extra-android-m2repository
-    - android-$EMULATOR_API_LEVEL
-    - addon-google_apis-google-$ANDROID_API_LEVEL
-    - addon-google_apis-google-$EMULATOR_API_LEVEL
-    - sys-img-armeabi-v7a-google_apis-$ANDROID_API_LEVEL
-    - sys-img-armeabi-v7a-google_apis-$EMULATOR_API_LEVEL
-
-
-  licenses:
-    - android-sdk-license-.+
-    - '.+'
-
-  before_install:
-    - chmod +x gradlew
-    - mkdir "$ANDROID_HOME/licenses" || true
-    - echo -e "\n8933bad161af4178b1185d1a37fbf41ea5269c55" > "$ANDROID_HOME/licenses/android-sdk-license"
-    - echo -e "\n84831b9409646a918e30573bab4c9c91346d8abd" > "$ANDROID_HOME/licenses/android-sdk-preview-license"
-
-before_script:
-  - echo no | android create avd --force -n test -t "android-"$EMULATOR_API_LEVEL --abi $ANDROID_ABI --tag $ANDROID_TAG
-  - emulator -avd test -no-skin -no-audio -no-window &
-  - android-wait-for-emulator
 
 script:
   - ./gradlew connectedAndroidTest coveralls