Android FlatList with borderRadius applied does not respect border to clip list items on Android

[CalNicklin]

Description

When applying border radius to a FlatList on Android, FlatList style is not respected when clipping child views in the list. Works on iOS, screen recording for comparison.

Applying 'overflow':'hidden' does not fix.

Steps to reproduce

Render this FlatList:
<View style={{ justifyContent: 'center', alignItems: 'center' }}> <FlatList style={{ width: 150, height: 100, backgroundColor: 'gray', borderBottomLeftRadius:95, borderBottomRightRadius:100, borderTopLeftRadius:180, borderTopRightRadius:165, }} data={['1', '2', '3']} contentContainerStyle={{ justifyContent: 'center', alignItems: 'center', }} renderItem={({ item, index }) => { return ( <View key={index} style={{width: 150, height: 50, backgroundColor: 'red'}}> <Text style={{textAlign: 'center'}}>{item}</Text> </View> ) }} numColumns={1} horizontal={true} pagingEnabled={true} decelerationRate={'fast'} showsHorizontalScrollIndicator={false} /> </View>

React Native Version

0.73.8, also tested on 0.74.1

Affected Platforms

Runtime - Android

Output of npx react-native info

System:
  OS: macOS 14.5
  CPU: (16) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  Memory: 166.17 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.11.1
    path: ~/.volta/tools/image/node/20.11.1/bin/node
  Yarn:
    version: 3.6.4
    path: ~/.volta/tools/image/yarn/3.8.0/bin/yarn
  npm:
    version: 10.2.4
    path: ~/.volta/tools/image/node/20.11.1/bin/npm
  Watchman:
    version: 2024.03.18.00
    path: /usr/local/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.5
      - iOS 17.5
      - macOS 14.5
      - tvOS 17.5
      - visionOS 1.2
      - watchOS 10.5
  Android SDK:
    API Levels:
      - "30"
      - "31"
      - "33"
      - "33"
      - "34"
    Build Tools:
      - 30.0.2
      - 30.0.3
      - 31.0.0
      - 33.0.0
      - 33.0.1
      - 33.0.2
      - 34.0.0
      - 34.0.0
    System Images:
      - android-30 | Google APIs Intel x86 Atom
      - android-30 | Google Play Intel x86 Atom
      - android-31 | Google APIs Intel x86_64 Atom
      - android-33 | Android TV Intel x86 Atom
      - android-33 | Google APIs Intel x86_64 Atom
      - android-34 | Google APIs Intel x86_64 Atom
      - android-34 | Google Play Intel x86_64 Atom
    Android NDK: Not Found
IDEs:
  Android Studio: 2023.1 AI-231.9392.1.2311.11076708
  Xcode:
    version: 15.4/15F31d
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.9
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.74.1
    wanted: 0.74.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

Stacktrace or Logs

No stack trace required

Reproducer

https://github.com/CalNicklin/flatlist-bug-android

Screenshots and Videos

Screen.Recording.2024-05-24.at.15.17.57.mov

[NickGerleman]

This is known bug where Android only does border clipping to child for View component currently. This will likely be fixed in future version, but workaround could be to wrap list in view, and apply radius to that.

[CalNicklin]

Thanks for the thoughts - that does in fact work if I add 'overflow': 'hidden' to the parent view, and can then remove the style prop from the FlatList.

[CalNicklin]

@NickGerleman is it also a known Android bug where borderWidth applied to only one side doesn't render correctly? i.e. should be inset and adhere to borderRadius, instead it's offset.