Diving into Android App Bundles

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Diving Into Android App Bundles DROIDCON KENYA 2019 AUGUST 8TH-9TH, 2019

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DROIDCON KENYA 2019 AUGUST 8TH-9TH, 2019 @_larikraun Omolara Adejuwon Android Engineer at Kudi Inc.

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Storage Space Many phones have storage less than 1GB available space Your app + Photos +Videos + Chats + Other apps =

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Time Large Apps Slower downloads Frustrated Users

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Cost Many users live on capped data. The larger the app, the less willing people are to download

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Key Insights 1% 3MB =

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ANALYZING APK classes.dex classes2.dex assets/ res/ AndroidManifest.xml

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Screen density xxxhdpi xxhdpi xhdpi hdpi mdpi ldpi Architecture arm64 x86 arm x86_64 Locale en xh db ja ... ...

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Android App Bundles

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Replaces the traditional monolithic apk

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Single artifact with all of your app's code and resources

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Play generates the apk optimized for specific devices. Therefore, AABs are not installable directly.

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20% average size saving vs universal APK 11% increase in installs due to size savings

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7.2% saved in App Size At Kudi

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ANALYZING AAB base/ dex/ classes.dex classes2.dex assets/ res/ manifest/ AndroidManifest.xml

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Dynamic Feature Modules

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AndroidManifest.xml

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droidconke/ dex/ classes.dex assets/ res/ manifest/ AndroidManifest.xml base/ dex/ classes.dex classes2.dex assets/ res/ manifest/ AndroidManifest.xml Base Module Dynamic Feature Module - droidconke

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Dynamic Delivery

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The smaller APKs are achieved by delivering only the resources the specific devices need.

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It works with Split APKs as the underlying principle

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Split APKs Base APK: contains all common code and resources Configuration APKs: contains resources based on device’s config i.e locale, architecture, screen density Dynamic Feature APKs: contains codes that can be downloaded at a later time. This will be discussed later in the presentation. - Introduced in Lollipop

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Screen density xxxhdpi xxhdpi xhdpi hdpi mdpi ldpi Architecture arm64 x86 arm x86_64 Locale en xh db ja fr ...

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Screen density xxhdpi xhdpi hdpi mdpi ldpi Architecture arm64 x86 arm x86_64 Locale en xh db ja fr ... xxxhdpi

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Screen density xxhdpi xhdpi hdpi mdpi ldpi Architecture x86 arm x86_64 Locale en xh db ja fr ... arm64 xxxhdpi

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Screen density xxhdpi xhdpi hdpi mdpi ldpi Architecture x86 arm x86_64 Locale xh db ja ... fr arm64 xxxhdpi

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In-App Updates

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Play Core library feature that introduces a new request flow to prompt active users to update your app

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Works only with devices running Android 5.0 (API level 21) or higher,

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A user experience that provides background download and installation with graceful state monitoring. This UX is appropriate when it’s acceptable for the user to use the app while downloading the update. Flexible In-App Updates

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A full screen user experience that requires the user to update and restart the app in order to continue using the app. Immediate In-App Updates

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This UX is best for cases where an update is critical for continued use of the app. After a user accepts an immediate update, Google Play handles the update installation and app restart. Immediate In-App Updates

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Is update available?

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Start the update

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Start the update

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For flexible updates, you need to handle the app installation yourself after the download is complete. Flexible Vs. Immediate In-App Updates For immediate updates, play handles the download and installation for you.

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Install the downloaded updated

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Conditional Delivery

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Let's you control which part of your app is served to which users

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You can specify conditions under which a feature would be delivered as part of the app installation or otherwise left out.

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Types of Conditions Country MinSdk Version Device Feature

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On-Demand Delivery

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Let's you install and uninstall specific features in on-demand

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AndroidManifest.xml

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To be able to maximize all the cool features of Android App Bundles as explained so far, your app needs to be well modularized. Moyinoluwa Adeyemi just delivered a great talk on App Modularization: From Zero to Hero

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Testing Android App Bundles

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Unlike APKs, AABs are not installable directly because play generates the apk optimized for specific devices

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Internal App Sharing

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Internal App Sharing gives you a quick and easy way to share Android App Bundle and Apk Internally

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It lets you upload app bundle or APK and share the link with your team.

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No signed APK or App bundle is required for Internal app sharing.

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No Unique Version code enforcement. So multiple APK or App bundles can be upload independently, to the play console.

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You can also debug the APK or App bundles once they’re installed to the tester’s device by uploading Debuggable artifacts.

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There are APIs available for Internal App sharing so you can automate some of the processes

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Image Credit: https://medium.com/mindorks/internal-app-sharing-in-android-f80c7751bf37

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A Challenge we faced at Kudi

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https://developer.android.com/studio/projects/dynamic-delivery https://developer.android.com/studio/command-line/bundletool https://events.google.com/io/schedule/?section=may-8&sid=b9eabde0-be05- 492c-bf9e-c3f772f1db7e https://codelabs.developers.google.com/codelabs/your-first-dynamic- app/index.html Useful Links

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Thank you for listening @_larikraun Omolara Adejuwon