ERROR_WRONG_LABEL when trying to print wireless using Android Brother Sdk for label printer

Question

I have trying to print using labels from my android app which using wifi commands Brother QL-720NW label printer. Since I performed factory

Answer 1

I resolved this by creating a LabelInfo object, since you have a Label Printer. It's not clear at all in the documentation. You need to set the label info after the printer info.

PrinterInfo info = myPrinter.getPrinterInfo();
info.paperSize = PrinterInfo.PaperSize.CUSTOM;

LabelInfo mLabelInfo = new LabelInfo();
mLabelInfo.labelNameIndex = 5;
mLabelInfo.isAutoCut = true;
mLabelInfo.isEndCut = true;
mLabelInfo.isHalfCut = false;
mLabelInfo.isSpecialTape = false;

myPrinter.setPrinterInfo(info);
myPrinter.setLabelInfo(mLabelInfo);

The ERROR_WRONG_LABEL means that you have a wrong value in paperSize or labelNameIndex. I have a P750W label printer with a 24'' paper. I found that value 5 is the good one for this size, but I don't know for your printer.