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AttachmentMediaActivity crashes in onStart when the url extra is null

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
76/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Active
Tech stack
android, kotlin
Domain
mobile-dev

Research direction

Start in AttachmentMediaActivity.kt at the onStart call shown in the stack trace, then trace how the url extra is read and how onCreate handles a missing value. Reproduce the case with the provided adb shell am start command. Done means starting the activity without a url extra no longer crashes and still shows the playback error.

Written by the indexing model from the issue text.

Description

Describe the bug
AttachmentMediaActivity crashes with a NullPointerException when it's started without a url extra. onCreate catches the null url, logs "This file can't be displayed", and shows the playback error, but binding is already initialized by then. So onStart gets past its ::binding.isInitialized check and calls Uri.parse(url) with null.

java.lang.NullPointerException: uriString
    at android.net.Uri$StringUri.<init>(Uri.java:496)
    at android.net.Uri$StringUri.<init>(Uri.java:486)
    at android.net.Uri.parse(Uri.java:458)
    at io.getstream.chat.android.ui.feature.gallery.AttachmentMediaActivity.onStart(AttachmentMediaActivity.kt:95)
    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1674)
    at android.app.Activity.performStart(Activity.java:8018)
    at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3469)

The same code is still in 7.13.0 and on develop.

SDK version

  • 7.3.0 (also present in 7.13.0)

To Reproduce
We don't know the exact user steps that end up with a null url, since AttachmentDestination passes assetUrl ?: "". You can hit the crash directly by starting the activity without the extra:

  1. On an emulator: adb root, then
    adb shell am start -n <your.app.id>/io.getstream.chat.android.ui.feature.gallery.AttachmentMediaActivity --es type video
  2. See the crash in onStart

Expected behavior
The activity doesn't crash when the url extra is null.

Device:

  • Vendor and model: Honor HRY-LX1T, OnePlus 8 Pro, OnePlus A0001
  • Android version: 11

Screenshots
N/A

Dominant language
Kotlin
Stars
1.7k
Forks
319
Avg merge
1d 19h
Merged PRs (30d)
73

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