2 Replies Latest reply on Sep 26, 2016 9:14 AM by Richard Hill

Disable scanning while processing barcode scanned.

Richard Hill Sep 20, 2016 8:22 AM

My application needs to scan a single barcode, then act upon that barcode which involves an API call to our application server, wait for a response, possibly show an alert if necessary, otherwise allow scanning of the next barcode.

What I'm currently doing on our TC8000 is calling scanner.Disable() in the event listener for a barcode scan, then after I'm done processing the barcode, calling scanner.Enable(). I don't want users to be able to scan while the app is processing the last scanned barcode.

I'm running into an issue with rapid scanning, that I sometimes get an exception that the scanner is disabled. I would speculate that scanner.Enable() and scanner.Disable() are expensive calls and I'm running into an issue where the scanner hasn't completed its Enable() function and I'm trying to access it.

What is the best practice for preventing additional scans while the scanner is processing the current scan?

Re: Disable scanning while processing barcode scanned.

Glenn Sayer Sep 23, 2016 1:17 PM (in response to Richard Hill)

I would be faster to change disable and re-enable the barcode types allowed. the only issue with this is the scanner will come on but will not decode and this could confuse some users. Another option is to scan the barcode but give the user a different sound until it is ready.
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- Re: Disable scanning while processing barcode scanned.
  
  Richard Hill Sep 26, 2016 9:14 AM (in response to Glenn Sayer)
  
  Glenn, thanks for your response. I found another thread that had an answer that is working for me (Why does TC55 (imager) not return from scanning? ). The solution that worked for me was putting a Thread.sleep(200) in the status listener when the scanner is Idle, before calling the scanner.read().
  
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