test emulator

.travis.yml

@@ -4,14 +4,26 @@ android:
   components:
     - platform-tools
     - tools
+    - extra-android-support
+    - extra-google-google_play_services
+    - extra-android-m2repository
+    - extra-google-m2repository
     - build-tools-28.0.3
     - android-28
+    - android-27
+    - android-22
+    - sys-img-armeabi-v7a-android-22
 before_install:
- - yes | ${ANDROID_HOME}/tools/bin/sdkmanager "platforms;android-28"
+ - yes | ${ANDROID_HOME}/tools/bin/sdkmanager "platforms;android-27"
 before_script:
+ - echo no | android create avd --force -n test -t android-22 --abi armeabi-v7a
+ - emulator -avd test -no-audio -no-window &
+ - android-wait-for-emulator
  - chmod +x gradlew
  - chmod +x generate-apks.sh
+ - adb shell input keyevent 82 &
 script:
  - ./gradlew build
+ - ./gradlew clean build connectedAndroidTest --stacktrace
 after_success:
  - ./generate-apks.sh