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Stopwatch continues running after stopped

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#70 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
android, kotlin, rust
Domain
backend, mobile

Research direction

Start by tracing the Stopwatch feature's stop event from the Android view lifecycle to the rust-backend, focusing on what happens when the view is closed or another app is opened. Reproduce the reported start, stop, close, and reopen sequence, then verify that a stopped stopwatch remains stopped after app termination, reopening ActivityWatch, and switching apps.

Written by the indexing model from the issue text.

Description

I have encountered a bug in the "Stopwatch" feature. It sometimes restarts a stopwatch, after I already stopped it.

I assume that this happens when the view is closed/terminated, before the "stop event" (or whatever the correct term is) is sent to the rust-backend. The best method I found to reproduce is:

  • Start a stopwatch
  • Let the stopwatch run for some time
  • Stop the stopwatch
  • Close the view manually, by using the "overview" button of the phone and closing the app
  • Re-open activitywatch
  • The stopwatch runs again

This does not trigger the bug 100%, so I would assume that there is some racing condition or the operation takes some time. My assumptions would have been that after pressing stop, the termination is directly "committed", but this does not seem to be the case.
The bug also happens, when I don't close the view manually, just by switching to another app.

ActivityWatch: v.0.10.0 (rust) (Installed over Google playstore)
Android: 8.0.0 (Samsung Galaxy S7)

Dominant language
Kotlin
Stars
270
Forks
57
Avg merge
20h 32m
Merged PRs (30d)
38

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