react / react/react-native

【Android】Touch event misbehavior with multiple touch points

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Issue: Author Provided Repro Platform: Android
Dominant language
C++
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Forks
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Avg merge
1d 23h
Merged PRs (30d)
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Description

Description

When I have multiple touch points on Android, events are mistakenly triggered.

In my case, when I place my finger on view A, which is bound to touch events, if I do not release my finger and place another finger on view B, the touch event for view A is triggered again, even though the second finger is on a different view.

I tested the behavior on iOS, and with the same operation, if my other finger is on view B, the touch event for view A is not triggered. Only if the other finger is also placed on view A will the touch event for view A be triggered again.

I also tried using TouchableWithoutFeedback, Pressable, and encountered the same issue on Android.

Steps to reproduce
  1. Install the app
  2. Place one finger on a view that is bound to an event and keep it there, then place another finger on a view that is not bound to any event to reproduce the issue
React Native Version

0.80.1

Affected Platforms

Runtime - Android

Output of npx @react-native-community/cli info
System:
  OS: macOS 14.2.1
  CPU: (8) arm64 Apple M3
  Memory: 135.97 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 23.10.0
    path: ~/.nvm/versions/node/v23.10.0/bin/node
  Yarn:
    version: 1.22.22
    path: /usr/local/bin/yarn
  npm:
    version: 10.9.2
    path: ~/.nvm/versions/node/v23.10.0/bin/npm
  Watchman:
    version: 2024.10.21.00
    path: /usr/local/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.4
      - iOS 17.4
      - macOS 14.4
      - tvOS 17.4
      - visionOS 1.1
      - watchOS 10.4
  Android SDK: Not Found
IDEs:
  Android Studio: 2023.3 AI-233.14808.21.2331.11709847
  Xcode:
    version: 15.3/15E204a
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.11
    path: /usr/bin/javac
  Ruby:
    version: 3.1.0
    path: /Users/didi/.rbenv/shims/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 19.0.0
    wanted: 19.0.0
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.80.1
    wanted: 0.80.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true
Stacktrace or Logs
no logs
MANDATORY Reproducer

https://github.com/yandadaFreedom/reproducer-react-native-0.80.1/tree/bug-android-multi-point-event

Screenshots and Videos

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the mandatory reproducer at yandadaFreedom/reproducer-react-native-0.80.1, install the app, and reproduce the multi-touch sequence on Android. Trace the touch-event handling involved in TouchableWithoutFeedback and Pressable, then verify that a second finger on an unrelated view does not retrigger the first view while a second finger on the same view does.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, react-native
Domain
mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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