Force execution in main thread in Dart

Question

In my Dart program I am using the camera:

...    
final File imageProduct =  await ImagePicker.pickImage(source: ImageSource.camera, maxHeight: 1024, maxWidth: 1024);
...

In previous version it worked well, now after a Flutter upgrade (v1.7.8+hotfix.3) the camera interface is displayed, I can take the photo, after that I get error:

W/Binder  ( 7331): Caught a RuntimeException from the binder stub implementation.
W/Binder  ( 7331): java.lang.RuntimeException: Methods marked with @UiThread must be executed on the main thread. Current thread: Binder:7331_4

In Flutter asynchronous functions are executed in main thread so I really don't understand what could be the problem. I couldn't find an explicit way to force execution in main thread.

What could be the solution.

Thanks.

See github.com/flutter/flutter/issues/34774

jamesdlin
– jamesdlin

2019-07-19 18:29:31 +00:00
Commented Jul 19, 2019 at 18:29 — jamesdlin
– jamesdlin, Commented Jul 19, 2019 at 18:29
Thanks, it was only a version issue...

IMozes
– IMozes

2019-07-31 07:57:30 +00:00
Commented Jul 31, 2019 at 7:57 — IMozes
– IMozes, Commented Jul 31, 2019 at 7:57

Israel Debrah · Accepted Answer · 2020-01-22 17:24:43Z

2

Change flutter channel to dev (flutter channel dev). (U can omit this step)
run flutter upgrade
Change version of ImagePicker to latest one 0.6.3+1.
Run project

Issue is solved.

edited Jan 22, 2020 at 17:24

answered Jan 20, 2020 at 9:04

Israel Debrah

215 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

DaReal Over a year ago

This solution works, version upgrade of imagepicker solves the issue. For me, it only required step 3 and reloading the project though. No flutter upgrade required.

Collectives™ on Stack Overflow

Force execution in main thread in Dart

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related