Ajuste para voltar com docker e não shell.

.gitlab-ci.yml

+image: openjdk:8-jdk-alpine
+
 variables:
   ANDROID_COMPILE_SDK: "25"
   ANDROID_BUILD_TOOLS: "25.0.3"
   ANDROID_SDK_TOOLS_REV: "3859397"  # "26.0.1"
-  ANDROID_CMAKE_REV: "3.6.3155560"
+
+before_script:
+  - mkdir $HOME/.android # For sdkmanager configs
+  - echo 'count=0' > $HOME/.android/repositories.cfg # Avoid warning
+  - wget --quiet --output-document=android-sdk.zip https://dl.google.com/android/repository/sdk-tools-linux-${ANDROID_SDK_TOOLS_REV}.zip
+  - mkdir $PWD/android-sdk-linux
+  - unzip -qq android-sdk.zip -d $PWD/android-sdk-linux
+  - export ANDROID_HOME=$PWD/android-sdk-linux
+  - export PATH=$PATH:$ANDROID_HOME/platform-tools/:$ANDROID_NDK_HOME
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager --update
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'tools'
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'platform-tools'
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'build-tools;'$ANDROID_BUILD_TOOLS
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'platforms;android-'$ANDROID_COMPILE_SDK
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'extras;android;m2repository'
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'extras;google;google_play_services'
+  - echo y | $ANDROID_HOME/tools/bin/sdkmanager 'extras;google;m2repository'
+  - chmod +x ./gradlew
+
 
 stages:
   - build
@@ -15,14 +35,20 @@ build:
     - master
   stage: build
   script:
-    - export ANDROID_HOME=$PWD/sdk
-    - export PATH=$PATH:$PWD/sdk/platform-tools/
-    - chmod +x ./gradlew
     - ./gradlew assembleDebug
   artifacts:
     paths:
     - app/build/outputs/
 
+unitTests:
+  tags:
+    - android
+  only:
+    - master
+  stage: test
+  script:
+    - ./gradlew test
+
 functionalTests:
   tags:
     - android
@@ -32,9 +58,9 @@ functionalTests:
   script:
     - wget --quiet --output-document=android-wait-for-emulator https://raw.githubusercontent.com/travis-ci/travis-cookbooks/0f497eb71291b52a703143c5cd63a217c8766dc9/community-cookbooks/android-sdk/files/default/android-wait-for-emulator
     - chmod +x android-wait-for-emulator
-    - echo y | $ANDROID_HOME/tools/bin/avdmanager --silent update sdk --no-ui --all --filter sys-img-x86-google_apis-${ANDROID_COMPILE_SDK}
-    - echo no | $ANDROID_HOME/tools/bin/avdmanager create avd -n test -t android-${ANDROID_COMPILE_SDK} --abi google_apis/x86
-    - $ANDROID_HOME/tools/bin/avdmanager/emulator64-x86 -avd test -no-window -no-audio &
+    - echo y | android-sdk-linux/tools/android --silent update sdk --no-ui --all --filter sys-img-x86-google_apis-${ANDROID_COMPILE_SDK}
+    - echo no | android-sdk-linux/tools/android create avd -n test -t android-${ANDROID_COMPILE_SDK} --abi google_apis/x86
+    - android-sdk-linux/tools/emulator64-x86 -avd test -no-window -no-audio &
     - ./android-wait-for-emulator
     - adb shell input keyevent 82
     - ./gradlew cAT

docker-compose.yml

-version: "2"
-
-services:
-  androidsdk:
-    image: thyrlian/android-sdk:latest
-    restart: always
-    container_name: androidsdk
-    volumes:
-      - /home/ci/sdk:/opt/android-sdk