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

[HideBottomViewOnScrollBehavior] Support for recycler view with reversed linear layout manager

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feature request Widget: BottomAppBar
Dominant language
Java
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Description

BottomAppBar has uncoordinated behavior because of target RecyclerView's LinearLayoutManager has reversed layout.
```kotlin
linearLayoutManager.reverseLayout = true
```

Current behavior with non-reversed layout:

Current behavior with reversed layout:

Desired behavior with reversed layout:

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 HideBottomViewOnScrollBehavior and inspect how it responds to the target RecyclerView's LinearLayoutManager when reverseLayout is true. Reproduce the reversed-layout example, compare it with the desired behavior shown in the linked image, and verify that the BottomAppBar remains coordinated in both layout directions.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, kotlin
Domain
mobile
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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