Migrate remaining Java sources to Kotlin

[markmur]

Summary

• convert remaining Android and React Native Java production and test sources to Kotlin
• preserve React Native static and module compatibility, including preload observability and allowed message origins
• leave zero tracked Java source files

[github-actions]

React Native — Coverage Report

Lines	Statements	Branches	Functions
	91.64% (307/335)	88.88% (176/198)	100% (81/81)

[github-actions]

Package Size

Platform	Artifact	Base	Head	Delta
React Native	npm tarball	107.3 KiB	106.2 KiB	-1.1 KiB
Android	release AAR	279.8 KiB	279.8 KiB	0 B

React Native file breakdown

File	Base	Head	Delta
node_modules/@shopify/checkout-kit-protocol/src/generated/Models.ts	85.4 KiB	85.4 KiB	0 B
node_modules/@shopify/checkout-kit-protocol/src/generated/Models.d.ts	53.0 KiB	53.0 KiB	0 B
ios/ShopifyCheckoutKit.swift	15.9 KiB	15.9 KiB	0 B
android/src/main/java/com/shopify/reactnative/checkoutkit/ShopifyCheckoutKitModule.java	15.9 KiB	—	-15.9 KiB
ios/AcceleratedCheckoutButtons.swift	14.1 KiB	14.1 KiB	0 B
android/src/main/java/com/shopify/reactnative/checkoutkit/ShopifyCheckoutKitModule.kt	—	13.9 KiB	+13.9 KiB
src/components/AcceleratedCheckoutButtons.tsx	13.0 KiB	13.0 KiB	0 B
src/index.ts	12.7 KiB	12.7 KiB	0 B
lib/commonjs/index.js	12.4 KiB	12.4 KiB	0 B
lib/commonjs/components/AcceleratedCheckoutButtons.js	11.4 KiB	11.4 KiB	0 B
src/index.d.ts	11.2 KiB	11.2 KiB	0 B
lib/commonjs/components/AcceleratedCheckoutButtons.js.map	10.4 KiB	10.4 KiB	0 B
lib/module/index.js	10.4 KiB	10.4 KiB	0 B
lib/module/components/AcceleratedCheckoutButtons.js	10.2 KiB	10.2 KiB	0 B
node_modules/@shopify/checkout-kit-protocol/src/generated/ProtocolNotifications.ts	9.5 KiB	9.5 KiB	0 B
lib/module/components/AcceleratedCheckoutButtons.js.map	9.1 KiB	9.1 KiB	0 B
lib/module/index.js.map	8.1 KiB	8.1 KiB	0 B
src/present-dispatcher.ts	8.0 KiB	8.0 KiB	0 B
lib/commonjs/index.js.map	7.9 KiB	7.9 KiB	0 B
node_modules/@shopify/checkout-kit-protocol/src/generated/ProtocolNotifications.d.ts	7.6 KiB	7.6 KiB	0 B
…and 122 smaller files

Android file breakdown

File	Base	Head	Delta
classes.jar	295.6 KiB	295.6 KiB	0 B
res/layout/checkout_view_content.xml	2.6 KiB	2.6 KiB	0 B
res/layout/checkout_sheet_content.xml	2.0 KiB	2.0 KiB	0 B
res/values/values.xml	1.3 KiB	1.3 KiB	0 B
R.txt	1.2 KiB	1.2 KiB	0 B
AndroidManifest.xml	922 B	922 B	0 B
proguard.txt	798 B	798 B	0 B
res/drawable/close.xml	431 B	431 B	0 B
res/menu/checkout_menu.xml	354 B	354 B	0 B
META-INF/com/android/build/gradle/aar-metadata.properties	157 B	157 B	0 B

Measured from the PR base SHA and PR head SHA. The file breakdown shows uncompressed sizes within each package artifact, so individual files do not sum to the compressed artifact total. This comment reports package artifact sizes only; it is not a final app binary-size report.

[bitrise]

Checkout Kit E2E results

Caution

E2E runs were skipped — 1 pipeline stage failed:

• e2e-build-react-native-ios — build log

None of the 3 planned runs executed:

• react-native-ios (ios)
• react-native-android (android)
• kotlin-android (android)

Pipeline build