Change the length of barcodes to decode


By default the Scandit Barcode Scanner scans barcodes with a fixed symbol count range. Under certain conditions it is helpful to modify the length of the barcode to be decoded, for example if

  • you want to scan longer codes which cannot be decoded with the default settings.
  • to optimize decoder performance for codes of certain lengths when the application only requires scanning particular barcode lengths.

The active symbol count setting is ignored for fixed-size barcodes (EAN and UPC barcodes) as well as 2d codes.

Change the barcode length

To know the symbol count of a barcode, you can either:

Changing the length of the barcodes is done through the property SymbologySettings.ActiveSymbolCounts. Following an example of changing for Code 128 barcodes the symbol count range (7-20).

ScanSettings settings = ScanSettings.DefaultSettings ();
NSMutableSet codeLengths = new NSMutableSet();
int i = 7;
for (i= 7; i <= 20; i++) {
codeLengths.Add (new NSNumber (i));
settings.SettingsForSymbology (Symbology.Code128).ActiveSymbolCounts = codeLengths;

Available since SDK version 4.12.0.