Bitbucket Pipeline android upload apk to slack

bitbucket-pipelines.yml

image: mingc/android-build-box:1.12.0

pipelines:
  branches:
    master:
      - step:
          caches:
            - gradle
            - gradlewrapper
            - androidavd
          script:
            - bash ./gradlew assemble
            # FETCH LAST COMMIT MESSAGE
            - export LAST_COMMIT_MESSAGE=`git log -1 --pretty=%B`
            - export BUILD_DATE=`date "+%Y/%m/%d@%H:%M:%S"`
            # CHANNEL_TOKEN - From here: https://api.slack.com/custom-integrations/legacy-tokens
            # CHANNEL - Your slack channel name to upload the apk 
            - mv "./app/build/outputs/apk/debug/app-debug.apk" "./app-${BITBUCKET_BRANCH}-${BITBUCKET_BUILD_NUMBER}.apk"
            - curl -F file=@"app-${BITBUCKET_BRANCH}-${BITBUCKET_BUILD_NUMBER}.apk" -F channels=$CHANNEL -F "initial_comment=Pipeline Build on $BUILD_DATE -- $LAST_COMMIT_MESSAGE" -F token=$CHANNEL_TOKEN https://slack.com/api/files.upload
            
definitions:
  caches:
    gradlewrapper: ~/.gradle/wrapper
    androidavd: $ANDROID_HOME/.android/avd

This allows you to push your latest apk build to a slack channel alongside a message( usually the commit message)