Try to modularize a not so legacy Android App

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Customer: "I want an App and a SDK"

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The obvious solution someProject/android someProject/sdk

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The obvious solution someProject/android someProject/sdk consumes

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The obvious solution - requirements someProject/android someProject/sdk consumes artifactory CI/CD

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The modularization solution someProject/android /app /sdk Benefits: ● No headache with artifactory and CI/CD ● Development of the SDK is "on the fly" ● … more?!

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Customer: "The SDK should contain feature A,B,C and X,Y,Z"

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The obvious solution someProject/android Packages: awesome/feature/a awesome/feature/b awesome/feature/c awesome/feature/x awesome/feature/y awesome/feature/z /sdk

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The modularization solution someProject/android /y /c /b /a /z /x /sdk Benefits: ● Each is decoupled of others ● Could be published independently ● Wrapper SDK provide still the full SDK ● app modules could pick only features which they require ● … more?!

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Customer: "We use Scandit for scanning barcodes. Here are the licenses. Uh - and maybe we will replace it later with XYZ"

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The obvious solution - Try to abstract it away someProject/android /app /build.gradle add licenses Implementation: awesome/scaninng/ abstract.kt scanditImpl.kt

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The modularization solution someProject/android /app /build.gradle add licenses Implementation: awesome/scaninng/ abstract.kt internal/scanditImpl.kt /scanning Benefits: ● Clear separation in our build files ● scanning module can be changed without touching /app ● … more?!

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Developer: "Our onboarding is so heavily. Let's extract it"

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The obvious solution someProject/android /onboarding /app

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The obvious solution someProject/android /onboarding /app HELP! I need some files* from /app * files like `layouts` or utility classes

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The obvious solution someProject/android /onboarding /app /resources /utils

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The obvious solution someProject/android /onboarding /app /resources /utils HELP! I need some files from /sdk

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The obvious solution someProject/android /onboarding /app /resources /a /sdk

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The obvious (and correct) solution someProject/android /onboarding /app /resources /a /sdk

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Audience: "Well, that looks weird and complicated"

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Speaker: "No it's not. It's like playing lego and pick only the correct bricks together"

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Q'nd A