ankidroid/Anki-Android

Deck deletion causes Default deck to appear in right window when DeckPicker is fragmented

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#21,087 opened on May 19, 2026

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 (2 comments) (0 reactions) (1 assignee)Kotlin (2,789 forks)batch import
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Description

Checked for duplicates?

  • This issue is not a duplicate

Does it also happen in the desktop version?

  • This bug does not occur in the latest version of Anki Desktop

What are the steps to reproduce this bug?

  1. On a tablet or other wide screen, open the DeckPicker.
  2. Ensure the collection is non-empty. The screen should be fragmented with the StudyOptionsFragment open on the right.
  3. Ensure the Default deck is deleted and not present in the left-hand deck list.
  4. Select a deck, then delete it (the collection should still be non-empty).
  5. The StudyOptionsFragment displays the Default deck!

https://github.com/user-attachments/assets/3d66a18b-7213-4f6f-939d-864ed7bcf6c6

cc @Haz3-jolt

Expected behaviour

The StudyOptionsFragment should show the next available deck.

Debug info

AnkiDroid Version = 2.24.0 (ebcf8e0e34921628b9b8a496c66ffd4adbb3705f)  Backend Version = 0.1.64-anki25.09.2 (25.09.2 3890e12c9e48c028c3f12aa58cb64bd9f8895e30)  Android Version = 16 (SDK 36)  ProductFlavor = play  Device Info = samsung | samsung | dm1q | dm1qcsx | SM-S911W | qcom  WebView Info = [com.google.android.webview | 772713703]: Mozilla/5.0 (Linux; Android 16; SM-S911W Build/BP2A.250605.031.A3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/147.0.7727.137 Mobile Safari/537.36  ACRA UUID = 4b66439e-1695-436a-854a-be601b87b058  FSRS = 5.1.0 (Enabled: true)  Crash Reports Enabled = true

(Optional) Anything else you want to share?

No response

Research

  • I have checked the manual and the FAQ and could not find a solution to my issue
  • (Optional) I have confirmed the issue is not resolved in the latest alpha release (instructions)

Contributor guide

Research direction
Inspect the StudyOptionsFragment update logic after deck deletion. Trace how the DeckPicker fragment communicates the deletion and how the right fragment selects the next deck. Look for cases where the Default deck is incorrectly set when no deck is selected.
Tech stack
kotlinjava
Domain
mobilefrontend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Android developmentFragment lifecycle
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70