也许我来晚了，但是我们的.gitlab-ci.yml格式错误。您错过了几行。 例如，在assembleRelease之后的stage: release中需要换行，script:应该换行

1. .yaml文件中的标识很重要。您混合了2个空格和4个缩进空格。您应该使它们相同。通常应该是2个空格。
2. 阶段，脚本和工件应该在新行中，而不是在同一行中。

这是一个可能的解决方法

image: openjdk:8-jdk

variables:
  ANDROID_COMPILE_SDK: "28"
  ANDROID_BUILD_TOOLS: "28.0.3"
  ANDROID_SDK_TOOLS:   "6609375_latest"

before_script:
  - echo ANDROID_COMPILE_SDK ${ANDROID_COMPILE_SDK}
  - echo ANDROID_BUILD_TOOLS ${ANDROID_BUILD_TOOLS}
  - echo ANDROID_SDK_TOOLS ${ANDROID_SDK_TOOLS}
  - apt-get --quiet update --yes
  - apt-get --quiet install --yes wget tar unzip lib32stdc++6 lib32z1
  - wget --quiet --output-document=android-sdk.zip https://dl.google.com/android/repository/commandlinetools-linux-${ANDROID_SDK_TOOLS}.zip
  - unzip -d android-sdk-linux android-sdk.zip
  - export ANDROID_SDK_ROOT=$PWD/android-sdk-linux
  - export SDK_MANAGER="${ANDROID_SDK_ROOT}/tools/bin/sdkmanager --sdk_root=${ANDROID_SDK_ROOT}"
  - echo y | ${SDK_MANAGER} "platforms;android-${ANDROID_COMPILE_SDK}" >/dev/null
  - echo y | ${SDK_MANAGER} "platform-tools" >/dev/null
  - echo y | ${SDK_MANAGER} "build-tools;${ANDROID_BUILD_TOOLS}" >/dev/null
  - export PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools/
  - chmod +x ./gradlew
  # temporarily disable checking for EPIPE error and use yes to accept all licenses
  - set +o pipefail
  - echo y | ${SDK_MANAGER} --licenses
  - set -o pipefail

stages:
  - build
  - test
  - release

lintDebug:
  stage: build
  script:
    - ./gradlew -Pci --console=plain :app:lintDebug -PbuildDir=lint

assembleDebug:
  stage: build
  script:
    - ./gradlew assembleDebug
  artifacts:
    paths:
      - app/build/outputs/

debugTests:
  stage: test
  script:
    - ./gradlew -Pci --console=plain :app:testDebug

assembleRelease:
  stage: release
  script:
    - echo $KEYSTORE_FILE | base64 -d > my.keystore
    - ./gradlew assembleRelease
      -Pandroid.injected.signing.store.file=$(pwd)/my.keystore
      -Pandroid.injected.signing.store.password=$KEYSTORE_PASSWORD
      -Pandroid.injected.signing.key.alias=$KEY_ALIAS
      -Pandroid.injected.signing.key.password=$KEY_PASSWORD
  artifacts:
    paths:
      - app/build/outputs/apk/release
      - CHANGELOG