previously scanned barcode is "scanned" on next start

[lukepighetti]

1. create controller
2. scan a barcode "foo"
3. dispose controller
4. create new controller

result:

the new controller emits a scan even for barcode "foo" even though that barcode is not in front of the camera

expected result:

it waits until the next barcode is visible to scan it

things I tried:

• disposing the controller
• stopping the camera

ideas:

It seems like the last used frame is being read on new scanning sessions. If so, all frames in memory should be cleared when a new scanning session is started

[navaronbracke]

Just to be clear, do you mean the pixel buffer / texture? Or the barcodes list on the Dart-side?

(We did have an old bug where the pixel buffer was not cleared, so an old frame was still shown on the texture view. That bug was fixed though)

[navaronbracke]

I tried to reproduce this on version 3.5.6 on Android, but was unable to do so.

Things I did:

• flutter run the example app on an Android device
• go to the basic with Controller sample
• scan a QR code with foo as content
• exit the page to trigger disposal of the controller
• go back to the with Controller sample
• scan the foo barcode again

When returning to the page, it correctly started with "Scan a barcode" instead of the old value "foo"

Do you have more information on what version of the plugin you are using, and on what platform this is happening?

[navaronbracke]

@lukepighetti Is this still an issue on the latest beta? (mobile_scanner 5.0.0-beta.1)