jpos.JposException：无法声明此设备具有独占访问权限。 Android Studio 错误

Question

我正在尝试开发一个应用程序，让我可以用热敏打印打印门票。

我使用 bixolon 打印机，SRP-350III 型号，但每次我尝试连接它时，都会遇到相同的错误，这是堆栈跟踪：

2023-12-13 12:37:42.409  7762-7858  System.err              com.gesplanet.gestion.TPVComercial   W  jpos.JposException: This device cannot be claimed for exclusive access.
2023-12-13 12:37:42.409  7762-7858  System.err              com.gesplanet.gestion.TPVComercial   W      at com.bxl.services.posprinter.POSPrinterBaseService.claim(POSPrinterBaseService.java:158)
2023-12-13 12:37:42.409  7762-7858  System.err              com.gesplanet.gestion.TPVComercial   W      at jpos.BaseJposControl.claim(BaseJposControl.java:284)
2023-12-13 12:37:42.409  7762-7858  System.err              com.gesplanet.gestion.TPVComercial   W      at com.gesplanet.gestion.TPVComercial.Bixolon.BixolonPrinter.printerOpen(BixolonPrinter.java:187)
2023-12-13 12:37:42.409  7762-7858  System.err              com.gesplanet.gestion.TPVComercial   W      at com.gesplanet.gestion.TPVComercial.PrinterConnectActivity

我正在遵循 bixolon 包含在 SDK 中的示例，但同样的情况正在发生。

有什么想法吗？

这是我用来连接的代码：

public boolean printerOpen(int portType, String logicalName, String address, boolean isAsyncMode) {
        if (setTargetDevice(portType, logicalName, BXLConfigLoader.DEVICE_CATEGORY_POS_PRINTER, address)) {
            int retry = 1;
            if (portType == BXLConfigLoader.DEVICE_BUS_BLUETOOTH_LE) {
                retry = 5;
            }
            //address = "/dev/bus/usb/001/004";
            address = logicalName;

            try {
                for (JposEntry entry: bxlConfigLoader.getEntries()) {
                    bxlConfigLoader.removeEntry(entry.getLogicalName());
                }

                Log.i("BixolonPrinter 163", "Iniciando datos: \n LogicalName: "+logicalName+" \n " +
                        "DeviceCategory: " + BXLConfigLoader.DEVICE_CATEGORY_POS_PRINTER+" \n" +
                        "ProductName: "  + BXLConfigLoader.PRODUCT_NAME_SRP_350III+" \n" +
                        "DeviceBus: "  + portType+" \n" +
                        "Address: " + address);

                bxlConfigLoader.addEntry(logicalName, BXLConfigLoader.DEVICE_CATEGORY_POS_PRINTER, BXLConfigLoader.PRODUCT_NAME_SRP_350III, portType, address);
                bxlConfigLoader.saveFile();
            } catch (Exception e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            }

            for (int i = 0; i < retry; i++) {
                try {
                    posPrinter.open(logicalName);
                    posPrinter.claim(5000 * 2);
                    posPrinter.setDeviceEnabled(true);
                    posPrinter.setAsyncMode(isAsyncMode);

                    mPortType = portType;
                    mAddress = address;
                    return true;
                } catch (JposException e) {
                    e.printStackTrace();
                    try {
                        posPrinter.close();
                    } catch (JposException e1) {
                        e1.printStackTrace();
                    }
                }
            }
        }
        return false;
    }

Answer 1

这个问题你解决了吗？我对于 Android 12 及以上设备也有同样的问题。打印机型号 SPP-R410