material-components / material-components/material-components-android

[TopAppBar] CollapsingToolbarLayout with scrollable view makes title shake

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bug Widget: TopAppBar
Dominant language
Java
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Description

**Description:** CollapsingToolbarLayout with scrollable view makes title shake. This also affects AOSP Settings and all other places, except the Settings in the Google app.

https://github.com/user-attachments/assets/b599d969-706d-4466-a803-6dbbd44f1cc8

**Expected behavior:** The title shouldn't have a weird position at the start of fling

**Source code:** The code snippet which is causing this issue

**Minimal sample app repro:** M3 Catalog

**Android API version:** 34

**Material Library version:** 1.13.0-alpha08

**Device:** All devices

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First steps

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  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

Reproduce the issue in the M3 Catalog minimal sample on Android API 34 with Material Library 1.13.0-alpha08, using a CollapsingToolbarLayout and a scrollable view. Start by observing the title during the start of a fling; done means the title no longer shifts or shakes at that point.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, java
Domain
mobile
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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