Automattic / Automattic/simplenote-android
Application not responding (ANR) when creating the app
- Dominant language
- Java
- Stars
- 1.9k
- Forks
- 318
- Avg merge
- 15h 23m
- Merged PRs (30d)
- 5
Description
We are getting ANR reports when the app is being created. The reports point to the callback `Simplenote.onCreate(...)` and specifically to `Simplenote.getAccountInfo()`. This is due to database queries done in the main thread.
A possible fix would be to make these calls in a different thread than the main thread:
```java
class Simplenote {
void onCreate(...) {
...
AppLog.add(Type.DEVICE, getDeviceInfo());
AppLog.add(Type.ACCOUNT, getAccountInfo());
AppLog.add(Type.LAYOUT, DisplayUtils.getDisplaySizeAndOrientation(Simplenote.this));
}
```
### Expected
The app starts without ANR problems.
### Observed
The app crashes after 5 seconds.
### Reproduced
**Note: ** to reproduce this issue, we have to have slow queries. This is hard to do but has been observed in Sentry reports.
1. Be sure the app is not running in the background
2. Open the app
Device Make: Nokia
Device Model: Nokia 7 plus
Android Version: 10.0.0
Simplenote Version: 2.23.0
Contributor guide
Research direction
Start by locating Simplenote.onCreate(...) and the getAccountInfo() implementation, then inspect the database queries reached during app creation. Reproduce with slow queries if possible and verify that startup no longer performs those calls on the main thread and completes without an ANR.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- databases, mobile
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100