getPrinter method

@override Future<void> getPrinter(PrinterListener listener)

Implementation

@override
Future<void> getPrinter(PrinterListener listener) async {
  var printerStr = await _methodChannel
      .invokeMethod<String>(Constants.METHOD_PRINT_GET_PRINTER);
  if (printerStr == null || printerStr.isEmpty) return;
  var printer = Printer.fromJson(jsonDecode(printerStr));
  listener.onDefPrinter(printer);
}