meliorence / meliorence/react-native-snap-carousel

Snap to next does not animate on Android

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#721 6 comments 0 reactions 0 assignees View on GitHub

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Dominant language
JavaScript
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Description

Is this a bug report, a feature request, or a question?

Bug report.

Have you followed the required steps before opening a bug report?

(Check the step you've followed - put an x character between the square brackets ([]).)

Have you made sure that it wasn't a React Native bug?

Yes

Is the bug specific to iOS or Android? Or can it be reproduced on both platforms?

Android

Is the bug reproductible in a production environment (not a debug one)?

Yes.

Environment
info Fetching system and libraries information...
System:
    OS: macOS 10.15.5
    CPU: (16) x64 AMD Ryzen 7 1700X Eight-Core Processor         
    Memory: 166.43 MB / 16.00 GB
    Shell: 5.7.1 - /bin/zsh
  Binaries:
    Node: 12.18.0 - ~/.nvm/versions/node/v12.18.0/bin/node
    Yarn: 1.22.4 - ~/.nvm/versions/node/v12.18.0/bin/yarn
    npm: 6.14.4 - ~/.nvm/versions/node/v12.18.0/bin/npm
  SDKs:
    iOS SDK:
      Platforms: iOS 13.5, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
  IDEs:
    Xcode: 11.5/11E608c - /usr/bin/xcodebuild
  npmPackages:
    react: 16.13.1 => 16.13.1 
    react-native: https://github.com/expo/react-native/archive/sdk-37.0.0.tar.gz => 0.61.4
Expected Behavior

When calling carouselRef.current.snapToItem(lastItemIndex) the carousel will animate to the position.

Actual Behavior

When calling carouselRef.current.snapToItem(lastItemIndex) the carousel does not animate to the position, it just snaps there. On iOS it does animate.

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 at the carouselRef.current.snapToItem(lastItemIndex) entry point and reproduce the behavior on Android in a production build. Compare the Android and iOS paths to determine why Android snaps without animating; done means snapToItem animates to the target position on Android as it does on iOS.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, react-native
Domain
mobile
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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