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Android Instant apps An introduction @fmendes6

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Instant apps are a… Modularization and Optimization
 Problem Plus configurations

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“It can take less than 
 a day of work to 
 get set up”

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“Depending on
 how your app 
 is built”

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I went on a mission to try it…

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…but it didn’t work.

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Still didn’t work.

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First it did.

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Then it didn’t anymore.

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So I tried outside the browser.

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And it worked always.

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What is an instant app?

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“…enables native Android applications to run in response to launching a URL, without installing the app.”

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Support ? 2016 2018 (?) 2017

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Why do we need an instant app?

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Vimeo increased session 
 duration by 130% Jet increased conversion
 rate by 27% NY Crosswords 2x number of sessions
 per user

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dotloop 62% increase in users
 who sign a document Onefootball # users who read news 
 and share content 
 increased 55% realtor.com 2x number of leads 
 per property listing 
 details pageview.

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How does it work?

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feature.apk

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“nope”

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“nope” Broadcast
 Intent
 Handle URL

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How do we implement an instant app?

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“Depending on
 how your app 
 is built”

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I - Android Project Topeka App Phone & Tablet Module

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II - Splitting App & Base Topeka APP Phone & Tablet Topeka-Base Feature

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II - Adding Instant App Topeka APP Phone & Tablet Topeka-Base Feature Topeka-InstantApp Instant App

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III - Defining App Links

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III - Defining App Links

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III - Defining App Links

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III - Defining App Links myshoppingapp://products/600613 https://.com/products/600613

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Build & Run

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II - Adding Instant App Topeka APP Phone & Tablet Topeka-Base Feature Topeka-InstantApp Instant App

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IV - Multi-Feature Topeka APP Phone & Tablet Topeka-Base Feature Topeka-InstantApp Instant App Feature #1 Feature #2

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IV - Multi-Feature Topeka APP Phone & Tablet Topeka-Base Feature Topeka-InstantApp Instant App Feature #1 Feature #2

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IV - Multi-Feature Topeka APP Phone & Tablet Topeka-Base Feature Topeka-InstantApp Instant App Feature #1 Feature #2

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Recap

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Application Module .aar .aar .apk .aar

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Instant App Module .apk .apk .zip .apk

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What use cases should an instant app cover?

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Use Cases “Instant Apps are driven by actions and should be available to users right when they are needed.”

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Use Cases

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Use Cases 
 “Instant Apps should focus primarily on helping users complete whatever task they set out to do with as little friction as possible, not drive full app installs.”

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However…

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Unsupported Features • Long-running background services • Manifest-registered broadcast receivers • Externally accessible content providers • Re-engagement notifications

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Security?

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Security • During development you need to prove that you own the domain through some .json configuration files. • The Instant App has limited access to handheld device-spec info, fe. MMI, Mac address, etc. • Access is denied automatically, so even as a developer, you cannot get access to this data. • However, you will have full access to Android ID and Ad ID.

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What about 
 UI/UX?

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Before and After

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No additional Splash Screens

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Allow task completion

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Publishing?

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Publishing • Code signing • Well formatted Intent Filters for proper deep linking • Each feature module plus the base module needs to be below 4mb.

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APK size

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APK Size Reduction • Refactor the codebase • Remove unused resources • Use more efficient file formats like WebP. • Download assets at runtime, if it makes sense and if possible. • Review internal/external libraries

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But there is more…

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Other concerns • The user state should be kept after the app gets installed. • Proguard may need to be reconfigured. • Injected dependencies may need some adjustments. • It can be challenging to move from a custom layered architecture to an Instant App ready architecture.

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User Story

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“Reserve time for developing the instant app and stop developing features during this time. This makes refactoring and moving code a lot easier. It took us about 4–5 weeks for a first releasable version.”

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“It can take less than 
 a day of work to 
 get set up”

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Let’s discuss some possible conversions

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It’s not on Google Play :(

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Instant apps are a… Modularization and Optimization
 Problem Plus configurations

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Thank you! Questions? @fmendes6

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References General • https://developer.android.com/topic/instant-apps/guides/index.html • https://medium.com/inloop/android-instant-apps-part-2-7bebb74fa7bb • https://techbeacon.com/how-deploy-android-instant-apps-web-apps-take- native-apps • https://speakerdeck.com/cyrilmottier/introduction-to-android-instant-apps • https://developer.android.com/topic/instant-apps/overview.html • https://www.youtube.com/watch?v=cosqlfqrpFA • https://developer.android.com/stories/index.html • https://developer.android.com/topic/instant-apps/ux-best-practices.html Reducing APK size • https://android-developers.googleblog.com/2017/08/android-instant-apps- best-practices-for.html • https://speakerdeck.com/pareshmayani/generating-efficient-apk-by-reducing- size-and-improving-performance • https://developer.android.com/topic/instant-apps/prepare.html • https://developer.android.com/topic/performance/reduce-apk-size.html

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References Developer Stories • http://rea.tech/building-the-realestate-com-au-android-instant-app/ • https://willowtreeapps.com/ideas/an-introduction-to-android-instant-apps • https://medium.com/jet-stories/make-your-app-instant-33855ab5d02b • https://medium.com/vimeo-engineering-blog/vimeo-android-instant- apps-2f8b1e94760c • https://tech.ticketmaster.com/2017/05/18/ticketmaster-demonstrates-cutting- edge-android-instant-apps-technology-at-google-io/ • https://medium.com/nos-digital/some-useful-insights-on-instant- apps-67cc7d177695 • http://tech.domain.com.au/2017/06/making-the-domain-android-app-instant- ⚡/ • https://tech.buzzfeed.com/from-westinghouse-to-android-instant- apps-60fbfaca4ebe Codelab • codelabs.developers.google.com/codelabs/android-instant-apps
 Cover • https://goo.gl/m4ovQ4