react / react/react-native

List jumping when sliding using maintainVisibleContentPosition on Android

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Issue: Author Provided Repro Needs: Triage :mag: Platform: Android
Dominant language
C++
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Forks
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Avg merge
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Merged PRs (30d)
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Description

Description

I use maintainVisibleContentPosition in the chat list. When sliding to view older chat messages, if a new message (Especially very long messages, exceeding the height of the screen) is inserted into the list, the (android) list will jump, but iOS will not.

I can reproduce it using the latest RN 0.72.6 and wrote a demo.

https://github.com/Rays15/flatlist-demo

https://github.com/facebook/react-native/assets/17613135/d8872f9c-489e-4b83-bcbf-4205191504b7

@janicduplessis Can this be fixed?

React Native Version

0.72.6

Output of npx react-native info

System:
OS: macOS 14.0
CPU: (12) arm64 Apple M2 Max
Memory: 1.95 GB / 32.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 16.15.1
path: ~/.nvm/versions/node/v16.15.1/bin/node
Yarn:
version: 1.22.19
path: ~/.nvm/versions/node/v16.15.1/bin/yarn
npm:
version: 8.11.0
path: ~/.nvm/versions/node/v16.15.1/bin/npm
Watchman:
version: 2023.08.14.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.12.1
path: /opt/homebrew/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 22.4
- iOS 16.4
- macOS 13.3
- tvOS 16.4
- watchOS 9.4
Android SDK: Not Found
IDEs:
Android Studio: 2022.3 AI-223.8836.35.2231.10406996
Xcode:
version: 14.3.1/14E300c
path: /usr/bin/xcodebuild
Languages:
Java:
version: 11.0.20
path: /Users/rays/.sdkman/candidates/java/current/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: 0.72.6
wanted: 0.72.6
react-native-macos: Not Found
npmGlobalPackages:
"react-native": Not Found
Android:
hermesEnabled: true
newArchEnabled: false
iOS:
hermesEnabled: Not found
newArchEnabled: Not found

Steps to reproduce

https://github.com/Rays15/flatlist-demo

Snack, screenshot, or link to a repository

https://github.com/Rays15/flatlist-demo

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 by running the linked flatlist-demo with React Native 0.72.6 and reproducing the Android jump while sliding through older messages. Trace the Android handling of maintainVisibleContentPosition and compare it with iOS behavior. Done means inserting a very long message no longer changes the visible position unexpectedly on Android.

Written by the indexing model from the issue text.

Assessment

Tech stack
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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