我是蓝牙初学者。我正在尝试使用Bluecove和Java。我想与已经连接/配对到我的计算机的设备进行通信（例如检索设备电池电量）。问题是我找不到连接的设备。
我知道我可以拥有本地设备，检索设备等，但我无法连接设备。我正在使用代码found here。
如果需要，我准备尝试另一个图书馆。
在BluetoothDevices.java中：
import javax.swing.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class BluetoothDevices extends javax.swing.JFrame {
/* DefaultListModel to attach it with JList */
private DefaultListModel defaultModel;
/* Map to get device details list */
private Map<String, List<String>> mapReturnResult = new HashMap<String, List<String>>();
/* Map to identify device on user click of JList */
private Map<Integer, List<String>> mapDevicePosition = new HashMap<Integer, List<String>>();
public BluetoothDevices() {
initComponents();
defaultModel = new DefaultListModel();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
JListBluetoothDevices = new javax.swing.JList();
lblDeviceName = new javax.swing.JLabel();
lblRuntimeDeviceName = new javax.swing.JLabel();
lblDeviceAddress = new javax.swing.JLabel();
lblRuntimeDeviceAddress = new javax.swing.JLabel();
lblServiceDetails = new javax.swing.JLabel();
jScrollPane2 = new javax.swing.JScrollPane();
JTextAreaServiceDetails = new javax.swing.JTextArea();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Bluecove Bluetooth Discovery");
setResizable(false);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowOpened(java.awt.event.WindowEvent evt) {
formWindowOpened(evt);
}
});
JListBluetoothDevices.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
JListBluetoothDevicesMouseClicked(evt);
}
});
jScrollPane1.setViewportView(JListBluetoothDevices);
lblDeviceName.setText("Bluetooth Device Name");
lblDeviceAddress.setText("Bluetooth Device Address");
lblServiceDetails.setText("Service Details");
JTextAreaServiceDetails.setColumns(20);
JTextAreaServiceDetails.setRows(5);
jScrollPane2.setViewportView(JTextAreaServiceDetails);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 158, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(lblDeviceName)
.addComponent(lblDeviceAddress))
.addGap(73, 73, 73)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(lblRuntimeDeviceAddress)
.addComponent(lblRuntimeDeviceName, javax.swing.GroupLayout.PREFERRED_SIZE, 144, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(lblServiceDetails)
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 475, Short.MAX_VALUE))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 185, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(lblDeviceName)
.addComponent(lblRuntimeDeviceName))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(lblDeviceAddress)
.addComponent(lblRuntimeDeviceAddress))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(lblServiceDetails)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, 0, 0, Short.MAX_VALUE)))
.addContainerGap())
);
pack();
}// </editor-fold>//GEN-END:initComponents
/* Search for bluetooth device when window opened */
private void formWindowOpened(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowOpened
int intDevicePosition = 0;
JListBluetoothDevices.setModel(defaultModel);
/* Create an object of ServicesSearch */
ServicesSearch ss = new ServicesSearch();
/* Get bluetooth device details */
mapReturnResult = ss.getBluetoothDevices();
/* Add devices in JList */
for (Map.Entry<String, List<String>> entry : mapReturnResult.entrySet()) {
defaultModel.addElement(entry.getValue().get(0));
mapDevicePosition.put(intDevicePosition, entry.getValue());
intDevicePosition++;
}
}//GEN-LAST:event_formWindowOpened
/* On click of any item in List Box */
private void JListBluetoothDevicesMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_JListBluetoothDevicesMouseClicked
/* Get bluetooth device details from temporary list */
List<String> tmpDeviceDetails = mapDevicePosition.get(JListBluetoothDevices.getSelectedIndex());
/* Set bluetooth device name */
lblRuntimeDeviceName.setText(tmpDeviceDetails.get(0));
/* Set bluetooth device Address */
lblRuntimeDeviceAddress.setText(tmpDeviceDetails.get(1));
if (tmpDeviceDetails.size() > 2 && tmpDeviceDetails.get(2) != null) {
/* Set bluetooth device service name and URL */
JTextAreaServiceDetails.setText(tmpDeviceDetails.get(2));
} else {
JTextAreaServiceDetails.setText("Service not found");
}
}//GEN-LAST:event_JListBluetoothDevicesMouseClicked
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
/* To set new look and feel */
JFrame.setDefaultLookAndFeelDecorated(true);
try {
/**
* Change look and feel of JFrame to Nimbus
* For other look and feel check
* http://www.javaquery.com/2013/06/how-to-applyset-up-swing-look-and-feel.html
*/
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception ex) {
ex.printStackTrace();
}
/* Create an object of BluetoothDevices */
BluetoothDevices bluetoothDevicesFrame = new BluetoothDevices();
/* make BluetoothDevices visible */
bluetoothDevicesFrame.setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JList JListBluetoothDevices;
private javax.swing.JTextArea JTextAreaServiceDetails;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JLabel lblDeviceAddress;
private javax.swing.JLabel lblDeviceName;
private javax.swing.JLabel lblRuntimeDeviceAddress;
private javax.swing.JLabel lblRuntimeDeviceName;
private javax.swing.JLabel lblServiceDetails;
// End of variables declaration//GEN-END:variables
}
在ServicesSearch.java中：
import javax.bluetooth.*;
import javax.bluetooth.UUID;
import java.util.*;
public class ServicesSearch {
/**
* UUID used to find specific service supported by bluetooth device
* https://www.bluetooth.org/en-us/specification/assigned-numbers/service-discovery
* Find UUIDs for all types of bluetooth services.
*/
/* To find push object service */
private UUID OBEX_OBJECT_PUSH_PROFILE = new UUID(0x1105);
/* To find file transfer service */
private UUID OBEX_FILE_TRANSFER_PROFILE = new UUID(0x1106);
/* To find hands free service */
private UUID HANDS_FREE = new UUID(0x111E);
/* Get URL attribute from bluetooth service */
private int URL_ATTRIBUTE = 0X0100;
public Map<String, List<String>> getBluetoothDevices() {
/**
* Find service on bluetooth device
* Note: In following line you can use one service at a time. I'm new to bluetooth programming it might me wrong perception.
* UUID[] searchUuidSet = new UUID[]{OBEX_FILE_TRANSGER_PROFILE};
*
* CORRECT: UUID[] searchUuidSet = new UUID[]{OBEX_FILE_TRANSGER_PROFILE};
* WRONG: UUID[] searchUuidSet = new UUID[]{OBEX_FILE_TRANSGER_PROFILE, OBEX_OBJECT_PUSH_PROFILE};
*/
/* Initialize UUID Array */
UUID[] searchUuidSet = new UUID[]{HANDS_FREE};
final Object serviceSearchCompletedEvent = new Object();
int[] attrIDs = new int[]{URL_ATTRIBUTE};
/* Create an object to get list of devices in range or paired */
RemoteDeviceDiscovery remoteDeviceDiscovery = new RemoteDeviceDiscovery();
/* Create map to return Bluetooth device address, name and URL */
final Map<String, List<String>> mapReturnResult = new HashMap<String, List<String>>();
try {
/* Create an object of DiscoveryListener */
DiscoveryListener listener = new DiscoveryListener() {
/* To find bluetooth devices */
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
}
/* To find bluetooth devices */
public void inquiryCompleted(int discType) {
}
/* Find service URL of bluetooth device */
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
for (int i = 0; i < servRecord.length; i++) {
/* Find URL of bluetooth device */
String url = servRecord[i].getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
if (url == null) {
continue;
}
String temporaryString = "";
/* Get object of bluetooth device */
RemoteDevice rd = servRecord[i].getHostDevice();
/* Get attribute from ServiceRecord */
DataElement serviceName = servRecord[i].getAttributeValue(URL_ATTRIBUTE);
if (serviceName != null) {
temporaryString = serviceName.getValue() + "\n" + url;
/* Put it in map */
mapReturnResult.get(rd.getBluetoothAddress()).add(temporaryString);
} else {
temporaryString = "Uknown service \n" + url;
/* Put it in map */
mapReturnResult.get(rd.getBluetoothAddress()).add(temporaryString);
}
}
}
public void serviceSearchCompleted(int transID, int respCode) {
/* Notify thread when search completed */
synchronized (serviceSearchCompletedEvent) {
serviceSearchCompletedEvent.notifyAll();
}
}
};
/* Get list of bluetooth device from class RemoteDeviceDiscovery */
for (Enumeration en = remoteDeviceDiscovery.getDevices().elements(); en.hasMoreElements();) {
/* Get RemoteDevice object */
RemoteDevice btDevice = (RemoteDevice) en.nextElement();
/* Create list to return details */
List<String> listDeviceDetails = new ArrayList<String>();
try {
/* Add bluetooth device name and address in list */
listDeviceDetails.add(btDevice.getFriendlyName(false));
listDeviceDetails.add(btDevice.getBluetoothAddress());
} catch (Exception e) {
}
/* Put bluetooth device details in map */
mapReturnResult.put(btDevice.getBluetoothAddress(), listDeviceDetails);
synchronized (serviceSearchCompletedEvent) {
LocalDevice.getLocalDevice().getDiscoveryAgent().searchServices(attrIDs, searchUuidSet, btDevice, listener);
serviceSearchCompletedEvent.wait();
}
}
} catch (Exception e) {
e.printStackTrace();
}
/* Return bluetooth devices detail */
return mapReturnResult;
}
}
在RemoteDeviceDiscovery.java中：
import javax.bluetooth.*;
import java.io.IOException;
import java.util.Vector;
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();
LocalDevice device = LocalDevice.getLocalDevice();
System.out.println("Address : " + device.getBluetoothAddress());
System.out.println("Name : " + device.getFriendlyName());
System.out.println("Powered : " + device.isPowerOn());
RemoteDevice[] devices = device.getDiscoveryAgent().retrieveDevices(DiscoveryAgent.PREKNOWN);
for (RemoteDevice d : devices) {
System.out.println("Adress : " + d.getBluetoothAddress());
System.out.println("Name : " + d.getFriendlyName(false));
System.out.println("Authenticated : " + d.isAuthenticated());
System.out.println("Trusted : " + d.isTrustedDevice());
System.out.println();
}
/* 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) */
System.out.println("Address : " + btDevice.getBluetoothAddress());
try {
System.out.println("Name : " + btDevice.getFriendlyName(false));
} catch (IOException e) {
}
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;
}
}
如您所见，我尝试为LocalDevice获取所有PREKNOWN设备。在这里，我可以找到我已连接到计算机的所有蓝牙设备，但我不知道它是否已连接。
这是输出：
Address : 000000000003
Name : M
Powered : true
Adress : ACD1B8925628
Name : BLU-RAY HOME THEATRE SYSTEM
Authenticated : false
Trusted : false
Adress : A0143D6B170A
Name : Parrot ZIK 2.0 V2.05
Authenticated : false
Trusted : false
Adress : DC415F7780BB
Name : iPhone de Benjamin
Authenticated : false
Trusted : false
Adress : B0B28FD3668D
Name : LaBox6687
Authenticated : false
Trusted : false
wait for device inquiry to complete...
Address : 4D08B6DE2FDE
Name : LaBox6687
Address : A5362CC20702
我想使用的设备是 Parrot ZIK 2.0 V2.05 。
答案 0 :(得分：3)
在链接库文档中，他们声称如下：
SmartGattLib是一个简化蓝牙工作的Java库 SMART设备（例如蓝牙4.0中的蓝牙低功耗）。它 提供所采用的GATT规范的所有UUID并且方便 解释特征的方法（例如Heart Rate，BatteryLevel）。
Implemented and tested characteristics
- BatteryLevel
- BodySensorLocation
- HeartRateMeasurement
- ManufacturerNameString
希望测试类中的这两个例子也会有所帮助。