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DavBfr / dart_barcode

Barcode generation library
https://pub.dev/packages/barcode
Apache License 2.0
134 stars 39 forks source link

Can't scan QR #15

Closed purushottamyadavbattula closed 4 years ago

purushottamyadavbattula commented 4 years ago

can't scan QR when kept into a card with background color ?? (Flutter) Screenshot 2020-06-25 at 5 32 43 AM

DavBfr commented 4 years ago

You need a white or light color margin around the QRCode in order to make it readable. Otherwise the reader can't find the beginning of the matrix.

purushottamyadavbattula commented 4 years ago

Still not working I added the margin Screenshot 2020-06-25 at 5 52 04 AM Screenshot 2020-06-25 at 5 55 27 AM

DavBfr commented 4 years ago

You inversed the colors? The readers expect the small squares in the 3 corners to be filled black. You can't change the colors. https://en.wikipedia.org/wiki/QR_code

purushottamyadavbattula commented 4 years ago

No, I am not inversing any colors, Container( color: Colors.black, Container( decoration: BoxDecoration( border: Border.all(color: Colors.white), ), child: BarcodeWidget( color: Colors.white, height: 100, width: 100, barcode: Barcode.qrCode(), data: 'https"//csedata-cdb17.firebaseapp.com', ), ), ),

purushottamyadavbattula commented 4 years ago

Wow working now, I think I have to inverse and nullify the background colors, Thank for the article and quick response (appreciated) Screenshot 2020-06-25 at 7 39 34 AM Container( color:black,Container( decoration: BoxDecoration( border: Border.all(color: Colors.white), ), child: Container( color: Colors.white, child: BarcodeWidget( color: Colors.black, height: 100, width: 100, barcode: Barcode.qrCode(), data: link, //'https"//csedata-cdb17.firebaseapp.com', ), ), ),),

Leoudayan commented 3 years ago

Can you post the code for the scan? I can only see the code for generation but not scanning :(

DavBfr commented 3 years ago

@Leoudayan This plugin can only create barcodes, not scan them.