Using Android Images with the Machine Executor

# .circleci/config.yaml
version: 2.1
orbs:
  android: circleci/android@1.0.3
workflows:
  test:
    jobs:
      # This job uses the Android machine image by default
      - android/run-ui-tests:
          # Use pre-steps and post-steps if necessary
          # to execute custom steps before and afer any of the built-in steps
          system-image: system-images;android-29;default;x86

# .circleci/config.yml
version: 2.1
orbs:
  android: circleci/android@1.0
jobs:
  test:
    executor:
      name: android/android-machine
      resource-class: large
    steps:
      - checkout
      # Create an AVD named "myavd"
      - android/create-avd:
          avd-name: myavd
          system-image: system-images;android-29;default;x86
          install: true
      # By default, after starting up the emulator, a cache will be restored,
      # "./gradlew assembleDebugAndroidTest" will be run and then a script
      # will be run to wait for the emulator to start up.
      # Specify the "post-emulator-launch-assemble-command" command to override
      # the gradle command run, or set "wait-for-emulator" to false to disable
      # waiting for the emulator altogether.
      - android/start-emulator:
          avd-name: myavd
          no-window: true
          restore-gradle-cache-prefix: v1a
      # Runs "./gradlew connectedDebugAndroidTest" by default.
      # Specify the "test-command" parameter to customize the command run.
      - android/run-tests
      - android/save-gradle-cache:
          cache-prefix: v1a
workflows:
  test:
    jobs:
      - test

# .circleci/config.yml
version: 2.1
jobs:
  build:
    machine:
      image: android:202102-01
    # To optimize build times, we recommend "large" and above for Android-related jobs
    resource_class: large
    steps:
      - checkout
      - run:
          name: Create avd
          command: |
            SYSTEM_IMAGES="system-images;android-29;default;x86"
            sdkmanager "$SYSTEM_IMAGES"
            echo "no" | avdmanager --verbose create avd -n test -k "$SYSTEM_IMAGES"
      - run:
          name: Launch emulator
          command: |
            emulator -avd test -delay-adb -verbose -no-window -gpu swiftshader_indirect -no-snapshot -noaudio -no-boot-anim
          background: true
      - run:
          name: Generate cache key
          command: |
            find . -name 'build.gradle' | sort | xargs cat |
            shasum | awk '{print $1}' > /tmp/gradle_cache_seed
      - restore_cache:
          key: gradle-v1-{{ arch }}-{{ checksum "/tmp/gradle_cache_seed" }}
      - run:
          # run in parallel with the emulator starting up, to optimize build time
          name: Run assembleDebugAndroidTest task
          command: |
            ./gradlew assembleDebugAndroidTest
      - run:
          name: Wait for emulator to start
          command: |
            circle-android wait-for-boot
      - run:
          name: Disable emulator animations
          command: |
            adb shell settings put global window_animation_scale 0.0
            adb shell settings put global transition_animation_scale 0.0
            adb shell settings put global animator_duration_scale 0.0
      - run:
          name: Run UI tests (with retry)
          command: |
            MAX_TRIES=2
            run_with_retry() {
               n=1
               until [ $n -gt $MAX_TRIES ]
               do
                  echo "Starting test attempt $n"
                  ./gradlew connectedDebugAndroidTest && break
                  n=$[$n+1]
                  sleep 5
               done
               if [ $n -gt $MAX_TRIES ]; then
                 echo "Max tries reached ($MAX_TRIES)"
                 exit 1
               fi
            }
            run_with_retry
      - save_cache:
          key: gradle-v1-{{ arch }}-{{ checksum "/tmp/gradle_cache_seed" }}
          paths:
            - ~/.gradle/caches
            - ~/.gradle/wrapper
workflows:
  build:
    jobs:
      - build