There is support for Code39 check digit validation.
The Reader needs to be created with the appropriate flags, or if
using the MultiFormatOneDReader there is a Hint
DecodeHintType.ASSUME_CODE_39_CHECK_DIGIT that can be supplied to
instruct the Multi-Format reader to use a Code39 reader with
check-digit validation.
Depending on the way you use the ZXing scanner the method of
supplying that hint would be different.
* Intent integration: just add an Extra to the Intent with the name
of "ASSUME_CODE_39_CHECK_DIGIT"
* Web Page integration: add an "ASSUME_CODE_39_CHECK_DIGIT" query
parameter to the zxing://scan/ or
http://zxing.appspot.com/scan URL
* Apparently there is no way to send intent extras when using
IntentIntegrator from the android-integration project, but you can
sub-class it, override the startActivityForResult(Intent intent, int
code) method and add an Intent Extra with the
"ASSUME_CODE_39_CHECK_DIGIT" and any value.
HTH
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