Flutter won't return boolean in async await method

Question

I need to check my file reading was successful and return true or false. I need to use async and await function because it needs to return true otherwise no point continuing.

I get a run time error from my snapshot: format.Exception:Invalid boolean false

Offending line is: bool result = await fb.readFile();

More detail image:

can you provide a working example? for example the definition of fb nor Rung.myList is not part of your example code. otherwise the code looks fine on a first glance. — scrimau
– scrimau, Commented Sep 24, 2023 at 14:16
try with FutureBuilder, & try to upload code-snippet instead of code-image. More about Why should I not upload images of code/data/errors? — Md. Yeasin Sheikh
– Md. Yeasin Sheikh, Commented Sep 24, 2023 at 14:43
your IDE should mark this code as invalid, already before compiling: bool result = await fb.readFile(); Reason being, that fb is not accesible in an initializer, since fb is initialized at the same time as result is (that being on creation of an A instance). also async code is prolly invalid as an initializer. — scrimau
– scrimau, Commented Sep 24, 2023 at 14:55

CURRO · Accepted Answer · 2023-09-25 15:41:03Z

0

You dont have a return, maybe something like this:

Future<bool> boolFuture()async{
await Future.delayed(Duration(seconds: 1));
return false;
}

Good luck

answered Sep 25, 2023 at 15:41

CURRO

791 silver badge4 bronze badges

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

Collectives™ on Stack Overflow

Flutter won't return boolean in async await method

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related