fix: draw text decorations animated by Reanimated on Android

[MatiPl01]

Note

This pull request was authored by AI on behalf of @MatiPl01.

Summary

On Android with React Native 0.87+, a CSS animation or transition of textDecorationLine, textDecorationColor or textDecorationStyle never shows the decoration. Since react/react-native#56768 ReactTextView.onDraw paints underline and strikethrough itself, but only while the TextView has a Layout. setText drops it and Fabric measures the view again only when its frame changed, so every UI-thread commit that changes just the text attributes leaves the next draw without decorations (iOS is unaffected). Found by @tshmieldev.

This is a React Native bug, fixed upstream in react/react-native#58579. Until that ships, after a successful commit on Android Reanimated asks the mounted Paragraph views that lost their Layout to measure themselves at their current size, which happens after the mount and before the frame is drawn. It is a no-op for views whose frame changed (Fabric already measured them) and for text updated from React commits.

Test plan

CSS Animations > Animated Properties > Base Properties > Text Decoration > Text Decoration Line on an Android emulator or device.

before-after-reanimated-fix-android-textDecorationLine.mp4

Changelog

Entry added under Unpublished in packages/react-native-reanimated/CHANGELOG.md.

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Reviewing files that changed from the base of the PR and between 3960f51 and e81e72e.

📒 Files selected for processing (1)

• packages/react-native-reanimated/Common/cpp/reanimated/NativeModules/ReanimatedModuleProxy.cpp

🚧 Files skipped from review as they are similar to previous changes (1)

• packages/react-native-reanimated/Common/cpp/reanimated/NativeModules/ReanimatedModuleProxy.cpp

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📝 Walkthrough

Walkthrough

Android commit handling now collects committed paragraph view tags and requests their relayout through a platform callback. The JNI bridge forwards these tags to Kotlin. Kotlin resolves ReactTextView instances and measures eligible views with exact dimensions when their layout is missing. The changelog documents the fix for animated text decorations on Android with React Native 0.87+.

Priority: ⬇️ Low

Change: Bug fix

Merge Risk: ⚪ Minimal · up to e81e7

The Android relayout callback runs on the required UI thread, with no concrete unresolved issue identified in the changed flow.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the primary change: fixing Android text decorations animated by Reanimated.
Description check	✅ Passed	The description directly explains the Android React Native 0.87+ bug, the implemented relayout behavior, affected properties, test plan, and changelog update.

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