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AccessibilityBridge in Android needs to use BreakIterator instead of relying on regex for predicting cursor movements #175623

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AccessibilityBridge in Android needs to use BreakIterator instead of relying on regex for predicting cursor movements#175623
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P2Important issues not at the top of the work listc: tech-debtTechnical debt, code quality, testing, etc.engineflutter/engine related. See also e: labels.platform-androidAndroid applications specificallyteam-androidOwned by Android platform teamtriaged-androidTriaged by Android platform team

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@ash2moon
ash2moon
opened on Sep 18, 2025

Currently in the AccessibilityBridge we have some fragile hardcoded regexes that try to predict where the cursor should land next (see example).

Instead of relying on regex we should use BreakIterator so we do not have to maintain this code. For example, from JDK 19, a breaking change was introduced that resulted in having to skip the itCanPredictCursorMovementsWithGranularityWordUnicode test due to a change in how unicode characters were handled in word breaks.

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  1. ash2moon
    added the
    Bug
    issue type on Sep 18, 2025
  2. ash2moon
    added
    fyi-androidFor the attention of Android platform team
    fyi-accessibilityFor the attention of Framework Accessibility team
    P2Important issues not at the top of the work list
    on Sep 18, 2025
  3. tirth-patel-nc
    added
    in triagePresently being triaged by the triage team
    platform-androidAndroid applications specifically
    engineflutter/engine related. See also e: labels.
    team-androidOwned by Android platform team
    and removed
    in triagePresently being triaged by the triage team
    on Sep 19, 2025

  4. flutter-triage-bot commented on Sep 19, 2025

    @flutter-triage-bot
    flutter-triage-botbot
    on Sep 19, 2025

    The fyi-android label is redundant with the team-android label.

  5. flutter-triage-bot
    removed
    fyi-androidFor the attention of Android platform team
    on Sep 19, 2025
  6. stuartmorgan-g
    removed the
    Bug
    issue type on Sep 19, 2025
  7. stuartmorgan-g
    added the
    Bug
    issue type on Sep 19, 2025
  8. github-merge-queue
    added a commit that references this issue on Sep 22, 2025

    bump robolectric and java to 21 (#175550)

    d5592e4
  9. reidbaker
    added
    triaged-androidTriaged by Android platform team
    c: tech-debtTechnical debt, code quality, testing, etc.
    on Sep 23, 2025
  10. Jaineel-Mamtora
    added a commit that references this issue on Sep 24, 2025

    bump robolectric and java to 21 (flutter#175550)

    b9b5634
  11. chunhtai
    added
    triaged-accessibilityTriaged by Framework Accessibility team
    on Sep 24, 2025

  12. chunhtai commented on Sep 24, 2025

    @chunhtai
    chunhtai
    on Sep 24, 2025
    Contributor

    This part of the code was added to support voice access text editing. I agree we should use a more standard library for text parsing

  13. flutter-triage-bot
    removed
    fyi-accessibilityFor the attention of Framework Accessibility team
    triaged-accessibilityTriaged by Framework Accessibility team
    on Sep 24, 2025
  14. lucaantonelli
    added a commit that references this issue on Nov 21, 2025

    bump robolectric and java to 21 (flutter#175550)

    9637753
  15. reidbaker
    added a commit that references this issue on Dec 10, 2025

    bump robolectric and java to 21 (flutter#175550)

    153b3fd
  16. Nakiha
    added a commit that references this issue on Sep 28, 2026

    bump robolectric and java to 21 (#175550)

    5bb5750
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