(Intro)

• Publishing format != APK
• structure of bundle
  • *.pb : protocol buffer format extension
• File targeting
  • res/drawable-<hdmi> etc
• Assets targeting
  • assets/<name>#<lang/tcf/opengl/vulkan>_<value>/…

    Serving

• Post L: Split APKs
  • Bundle → Base + resource + architecture + language
• Pre L : Standalone APKs
  • split to 4 ABIs * 6 Densities
  • all languages are included

    (Facts)

• 10PB saved per day
• Twitter 20%
• textPlus 26%

  Building the Android App Bundle

• Android Studio 3.2
• Build → Build Bundle(s) / APK(s) → Bundle(s)
• ./gradlew modulename:bundleVariant
• modulename/build/outputs/bundleVariant/bundle.aab

  Signed and ready for publishing

• bundle block?
• Enroll in App Signing by Google Play

  Bundle Explorer

  Publishing API

  How to test an Android App Bundle

• Bundletool
  • $ bundletool build-apks --bundle=myapp.aab --output=myapp.apks --device-spec=pixel2.json
  • $ bundletool install-apks --apks=my-recipe-app.apks
  • github.com/google/bundletool

    Modularization

• When to Modularize?
• Creating a dynamic Feature
  • Android Studio 3.2 New Module
    • manifest
    • build.gradle
• Play Core Library
  • SplitInstallManager
• Installing Modules
  • SplitCompat on L/M, no need to restart
• Updating Modules
  • versions are always in sync