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Duplicate cached thumbnails based on grid column width

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Evaluación

Dificultad
3/5
Tiempo estimado
1-2 días
Aptitud para principiantes
55/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Estancado
Stack tecnológico
android, kotlin
Área
mobile, performance

Línea de trabajo

Start in app/src/main/kotlin/org/fossify/gallery/extensions/Context.kt, the location the issue identifies for overriding thumbnail request options. Reproduce with a clean cache, a grid column count that does not divide the screen width, then reverse the sort and compare cached thumbnail sizes. Done means the same grid size no longer creates duplicate cache entries differing by 1px; consider whether folder thumbnails show the same behavior.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

bug needs triage
Checklist
  • I can reproduce the bug with the latest version given here.
  • I made sure that there are no existing issues - open or closed - to which I could contribute my information.
  • I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
  • I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
  • I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
  • This issue contains only one bug.
  • I have read and understood the contribution guidelines.
Affected app version

1.13.1

Affected Android/Custom ROM version

Android 16

Affected device model

Pixel 10 (emulated)

How did you install the app?

Built from source

Steps to reproduce the bug
  1. Start with a clean cache.
  2. In the media grid use a column count that is not divisible by screen width.
  3. Take note of the current cached thumbnails and their resolution.
  4. Sort the media grid in the opposite direction.
  5. Look at the cache again, new entries have been created that have a 1px difference in resolution.
Expected behavior

App does not cache thumbnails twice for the same grid size.

Actual behavior

When tiles move in the media grid from one column to another there is a chance it creates a new cache entry that has a 1px size difference. This depends on if the screen width is divisible by the column count.
For example a screen with a width of 1080px and a column count of 7 creates cached thumbnails with sizes 152px and 153px. If a tile then moves to a column with a different width a new thumbnail is created.

The problem can be more or less noticeable depending on the screen resolution.
By estimation, not actually tested each resolution:

Resolution (vertical) Appears with column count
1080x2424 (Pixel 10) 7...
1440x3120 (S25 Ultra) 7...
1220×2656 (Xiaomi 17) 3, 6, 7...
Screenshots/Screen recordings

No response

Additional information

The problem likely appears for folder thumbnails too.

Potential fix could be to calculate what the thumbnail resolution should be when columns change and round the result. Then pass that as an override to RequestOptions in app/src/main/kotlin/org/fossify/gallery/extensions/Context.kt

Tested with square thumbnails, no rounded corners, thumbnail spacing 1px.
Grid and tile padding affect thumbnail size too.

Lenguaje dominante
Kotlin
Estrellas
3.8k
Forks
270
Merge medio
1 d 7 h
PR fusionados (30 d)
13

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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