【问题标题】:A socket operation wasattempted to an unreachable network, using bluetooth尝试使用蓝牙对无法访问的网络进行套接字操作
【发布时间】:2013-01-15 13:19:58
【问题描述】:

我关注了一篇博客文章,该文章介绍了如何创建一个应用程序来查找蓝牙设备并通过选择一个文件将其上传到手机。

网络文章链接:http://www.substanceofcode.com/2008/06/20/sending-files-to-mobile-phone-using-bluetooth-and-obex/

private void uploadButtonActionPerformed(java.awt.event.ActionEvent evt) {
    //GEN-FIRST:event_uploadButtonActionPerformed
    try {
        // Get selected item from list
        ListItem selectedItem = (ListItem) deviceList.getSelectedValue();
        RemoteDevice device = selectedItem.getDevice();

        // Build URL for the bluetooth device, note the port 9
        String url = "btgoep://" + device.getBluetoothAddress() + ":9";

        // Get file as bytes
        FileInputStream stream = new FileInputStream(fileTextField.getText());
        File f = new File(fileTextField.getText());
        int size = (int) f.length();
        byte[] file = new byte[size];
        stream.read(file);

        // Filename
        String filename = f.getName();

        // Trigger the task in a different thread so it won't block the UI
        SendFileTask task = new SendFileTask(url, file, filename);
        Thread thread = new Thread(task);
        task.run();
    } catch(Exception ex) {
        System.err.println("Ex: " + ex.getMessage());
        ex.printStackTrace();
    }

现在在运行应用程序时,我可以看到可用设备列表,我可以选择设备并选择要上传的文件,但是当我单击发送时会引发错误,其内容是:

A socket operation was attempted to an unreachable network.
javax.bluetooth.BluetoothConnectionException: Failed to connect; [10051] A socket     operation was attempted to an unreachable network.
at com.intel.bluetooth.BluetoothStackMicrosoft.connect(Native Method)
at com.intel.bluetooth.BluetoothStackMicrosoft.access$700(BluetoothStackMicrosoft.java:44)
at com.intel.bluetooth.BluetoothStackMicrosoft$ConnectThread.run(BluetoothStackMicrosoft.java:651) 

【问题讨论】:

  • 运行 netstat 以确定服务器套接字是否在该端口监听
  • 同上@TechExchange 所说的,以及通常的做法:防火墙?同一个子网?代理?
  • 哪个端口用于蓝牙?

标签: java bluetooth bluecove


【解决方案1】:

我在 64 位 Windows 7 上遇到了同样的问题,在我从蓝牙设备列表中删除设备然后再次配对后,问题就消失了。

【讨论】:

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