material-components / material-components/material-components-android
[MaterialCardView] Large MaterialCardView with cornerSizeTopRight=24dp is not rendered on small screens
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- Dominant language
- Java
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Description
Description: We're using large MaterialCardView with rounded top corners inside a NestedScrollView. When testing on emulator representing an old phone (API 21, Nexus S, 480*800) we discovered that MaterialCardView just isn't rendered on the screen. Further investigation showed this only happens with certain values for cornerSizeTopRight attribute (24dp, 48dp).
Expected behavior:
Sample project: https://github.com/gmk57/TestCardView
Android API version: 21 (not reproduced on API 23, 25, 29)
Material Library version: 1.2.1, 1.3.0-alpha02
Device: Android Emulator representing Nexus S
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked TestCardView sample project and reproduce the issue on an API 21 Nexus S emulator using a large MaterialCardView inside a NestedScrollView. Compare cornerSizeTopRight values such as 24dp and 48dp with newer API levels, then trace the MaterialCardView rendering path. Done means the card renders correctly on the reported small screen without regressing newer APIs.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, java
- Domain
- mobile-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 32/100