javax.bluetooth.BluetoothStateException : BlueCove com. intel.bluetooth.BluetoothStackBlueZ 不可用

Question

我正在处理 Java 和 BlueCove 以找到蓝牙设备。

我创建了一个 Maven 项目并添加了 BlueCove 依赖项:

<dependency>
    <groupId>net.sf.bluecove</groupId>
    <artifactId>bluecove</artifactId>
    <version>2.1.0</version>
</dependency>

我在 Ubuntu 上工作，我安装了以下软件包:

sudo apt-get install bluez libbluetooth-dev
sudo apt-get build-dep bluez-tools

我复制并粘贴了一个示例 from here ，基本上如下:

import java.util.Vector;

import javax.bluetooth.DeviceClass;
import javax.bluetooth.DiscoveryAgent;
import javax.bluetooth.DiscoveryListener;
import javax.bluetooth.LocalDevice;
import javax.bluetooth.RemoteDevice;
import javax.bluetooth.ServiceRecord;

public class RemoteDeviceDiscovery {

    public Vector getDevices() {
    /* Create Vector variable */
    final Vector devicesDiscovered = new Vector();
    try {
        final Object inquiryCompletedEvent = new Object();
        /* Clear Vector variable */
        devicesDiscovered.clear();

        /* Create an object of DiscoveryListener */
        DiscoveryListener listener = new DiscoveryListener() {

            public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
                /* Get devices paired with system or in range(Without Pair) */
                devicesDiscovered.addElement(btDevice);
            }

            public void inquiryCompleted(int discType) {
                /* Notify thread when inquiry completed */
                synchronized (inquiryCompletedEvent) {
                    inquiryCompletedEvent.notifyAll();
                }
            }

            /* To find service on bluetooth */
            public void serviceSearchCompleted(int transID, int respCode) {
            }

            /* To find service on bluetooth */
            public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
            }
        };

        synchronized (inquiryCompletedEvent) {
            /* Start device discovery */
            boolean started = LocalDevice.getLocalDevice().getDiscoveryAgent().startInquiry(DiscoveryAgent.GIAC, listener);
            if (started) {
                System.out.println("wait for device inquiry to complete...");
                inquiryCompletedEvent.wait();
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    /* Return list of devices */
    return devicesDiscovered;
    }
}

但是当我运行我的程序时出现错误:

javax.bluetooth.BluetoothStateException: BlueCove com.intel.bluetooth.BluetoothStackBlueZ not available

在这一行:

boolean started = LocalDevice.getLocalDevice().getDiscoveryAgent().startInquiry(DiscoveryAgent.GIAC, listener);

我已经看到了 similar question 的其他答案没有成功。

有什么想法吗？

Answer 1

好吧，我知道我来晚了，但我在谷歌上搜索了同样的问题。这在 ubuntu 18.04 上对我有用:

sudo apt install blueman libbluetooth* bluez*
sudo systemctl start bluetooth

可以查看蓝牙状态后:

sudo systemctl status bluetooth

希望你能看到这个，如果你看到了，这对你有帮助:)