用java写一个简易的蓝牙数据抓取接口
时间: 2023-03-04 13:15:20 浏览: 91
好的,以下是一个简单的Java蓝牙数据抓取接口的示例代码:
```java
import java.io.*;
import javax.bluetooth.*;
import javax.microedition.io.*;
public class BluetoothDataGrabber implements DiscoveryListener {
private static final UUID SERIAL_PORT_PROFILE_UUID = new UUID(0x1101);
private Object lock;
private boolean deviceFound;
private String deviceAddress;
private RemoteDevice device;
private InputStream inputStream;
private OutputStream outputStream;
public BluetoothDataGrabber() {
lock = new Object();
}
public boolean findDevice(String deviceName) throws IOException, InterruptedException {
deviceFound = false;
deviceAddress = null;
LocalDevice localDevice = LocalDevice.getLocalDevice();
DiscoveryAgent discoveryAgent = localDevice.getDiscoveryAgent();
discoveryAgent.startInquiry(DiscoveryAgent.GIAC, this);
synchronized (lock) {
lock.wait();
}
if (deviceAddress == null) {
return false;
}
device = RemoteDevice.getRemoteDevice(deviceAddress);
UUID[] uuidSet = { SERIAL_PORT_PROFILE_UUID };
int[] attrIDs = { 0x0100 }; // service name
ServiceRecord[] records = discoveryAgent.searchServices(attrIDs, uuidSet, device, this);
if (records == null || records.length == 0) {
return false;
}
String connectionURL = records[0].getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
StreamConnection streamConnection = (StreamConnection) Connector.open(connectionURL);
inputStream = streamConnection.openInputStream();
outputStream = streamConnection.openOutputStream();
return true;
}
public void disconnect() throws IOException {
if (inputStream != null) {
inputStream.close();
}
if (outputStream != null) {
outputStream.close();
}
}
public void send(String data) throws IOException {
outputStream.write(data.getBytes());
}
public String receive() throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int ch;
while ((ch = inputStream.read()) != -1) {
buffer.write(ch);
if (ch == '\n') {
break;
}
}
return buffer.toString();
}
@Override
public void deviceDiscovered(RemoteDevice device, DeviceClass deviceClass) {
try {
String name = device.getFriendlyName(false);
if (name.equals(deviceName)) {
deviceFound = true;
deviceAddress = device.getBluetoothAddress();
}
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void inquiryCompleted(int discType) {
synchronized (lock) {
lock.notify();
}
}
@Override
public void serviceSearchCompleted(int transID, int respCode) {
}
@Override
public void servicesDiscovered(int transID, ServiceRecord[] records) {
}
}
```
这个类包含了一个蓝牙设备搜索和连接的逻辑。在`findDevice`方法中,首先使用本地蓝牙设备的发现代理对象开始设备搜索,然后在`deviceDiscovered`方法中找到设备后记录其地址。接着使用发现代理对象搜索串行端口服务,并获取连接 URL。最后使用连接 URL 连接到设备,打开输入输出流进行数据传输。
你可以使用`send`方法发送数据,使用`receive`方法接收数据。如果想断开连接,可以使用`disconnect`方法。