How to scan barcodes from the mobile screen itself?
Edit on Mar 10, 2020: I am also looking to do the same for QR codes.
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You could possibly try the solutions in App that reads images of QR codes? I'm not sure if they work on other barcodes as well. – eldarerathis Dec 05 '12 at 15:05
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1The recent suggested edit is being discussed on the meta. – beeshyams Mar 10 '20 at 11:22
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As already described in the above comments, this would require taking a screenshot and saving it as an image file. Having done that, there are several barcode scanners available in the Play Store supporting "loading" of barcodes from image files, as e.g. QR BARCODE SCANNER. QR Droid also seems to be capable of what you're looking for:
Scan QR codes from your camera, browser, SD card, or saved image
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This is another one QR Scanner. https://play.google.com/store/apps/details?id=com.teacapps.barcodescanner – Mark Jun 28 '20 at 11:28
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I'm frequently using Manatee Works 'Barcode Scanners' app for such a purpose. Here's the Google Play Store link to the demonstration application.
The app supports a wide variety of 1D/2D codes, scans very fast, and is free. The only downside is that the option to manipulate the results is few, namely either copy or email, because it's a mere demonstration.
Andrew T.
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