Change the length of barcodes to decode
Motivation
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:
- scan it with the "Any Code" mode of the Scandit demo app, available on the App Store and Google Play Store.
- have a look at Calculating symbol counts for variable-length symbologies.
Changing the length of the barcodes is done through setActiveSymbolCounts() on the symbology settings object. Following an example of changing for Code 128 barcodes the symbol count range (7-20).
SymbologySettings symSettings = settings.getSymbologySettings(Barcode.SYMBOLOGY_CODE128);
short[] activeSymbolCounts = new short[] {
7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
};
symSettings.setActiveSymbolCounts(activeSymbolCounts);
Available since SDK version 4.9.0.