[Android] Accept percentage-based border radius

[j-piasecki]

Description

ViewGroupManager which is a base for RNGestureHandlerButtonViewManager doesn't support borderRadius values other than Double. This causes Touchable to crash when setting a percentage-based border radius. This PR changes those values to use Dynamic and go through RNGestureHandlerButtonViewManager instead of falling back to ViewGroupManager.

iOS continues to work as before.

Test plan

import React from 'react';
import { Touchable } from 'react-native-gesture-handler';

export default function EmptyExample() {
  return (
    <Touchable
      style={{
        marginTop: 200,
        width: 300,
        height: 40,
        backgroundColor: '#ddd',
        borderRadius: '50%',
      }}
      underlayColor="black"
      animationDuration={{ in: 0, out: 2000 }}
    />
  );
}

Before: crash, after: no crash

[Copilot]

Pull request overview

Enables percentage-based borderRadius values (e.g. '50%') for Touchable/RNGestureHandlerButton on Android by preventing ViewGroupManager from coercing radius props to Double, and instead forwarding raw values to RNGestureHandlerButtonViewManager for parsing.

Changes:

• Updates the Button native component spec to declare border radius props as UnsafeMixed so raw values (number or percentage string) are forwarded.
• Updates Android RNGestureHandlerButtonViewManager border radius setters to accept Dynamic and parse via LengthPercentage.setFromDynamic(...).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/react-native-gesture-handler/src/specs/RNGestureHandlerButtonNativeComponent.ts	Switches border radius props to UnsafeMixed and explicitly declares non-logical radii so they route through this component’s delegate.
packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/RNGestureHandlerButtonViewManager.kt	Parses border radius props from Dynamic using LengthPercentage.setFromDynamic to support percentage strings and avoid Double casting crashes.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.