Question

我正在为我的MSc开发 Bluetooth 应用程序。结束项目。它包括在JAVA ME中实现的服务器，以及用Android编写的客户端。

问题是Android SDP似乎无法识别我的JAVA ME服务器的ServiceRecord。

如果我在我的客户端中使用方法BluetoothDevice.getUuids()和BluetoothDevice.fetchUuidsWithSdp()，则会返回一组UUIDs，但我的服务UUID中没有其他地方，因此我无法连接到它。

这是JAVAME服务器示例的代码：

/*IMPORTS*/

public class StackOverFlowServer extends MIDlet {
    Display mDisplay;
    Form mForm;
    LocalDevice local;
    StreamConnectionNotifier server;
    ServiceRecord sr;
    String conURL;
    StreamConnection conn;
    public StackOverFlowServer() {
        mDisplay = Display.getDisplay(this);
        mDisplay.setCurrent(mForm);
        mForm = new Form(null);
        conURL = "btspp://localhost:68EE141812D211D78EED00B0D03D76EC;"
                + "authenticate=false;encrypt=false;name=MySampleApp";
    }

    protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
        // TODO Auto-generated method stub

    }

    protected void pauseApp() {
        // TODO Auto-generated method stub

    }

    protected void startApp() throws MIDletStateChangeException {
        try {
            local = LocalDevice.getLocalDevice();
        } catch (BluetoothStateException e) {
            // Error handling code here
        }
        /*
        * When creating a StreamConnectionNotifier a service record
        * will automatically be created for us, describing the new
        * service. The service will have the Serial Port (0x1101)
        * value in the ServiceClassIDList (id 0x0001) attribute. The
        * service record will also have both the L2CAP (0x0100) and
        * RFCOMM (0x0003) values in the ProtocolDescriptorList (id
        * 0x0004) attribute. Other mandatory attributes will be set
        * automatically by the JABWT implementation. The optional
        * ServiceName (id 0x100) attribute will be set to the name
        * parameter, "BTDemoApp" in this case.
        */
        try {
            server = (StreamConnectionNotifier)
                    Connector.open(conURL);
        } catch (IOException e1) {
            // Error handling code here
        }
        /*
        * The automatically created service record can be obtained
        * from the LocalDevice object, using the reference to the
        * StreamConnectionNotifier.
        */
        try {
            sr = local.getRecord(server);
        }
        catch (IllegalArgumentException iae){
            // Error handling code here
        }
        /*
        * We create a new DataElement and set its content correctly.
        */
        DataElement elm = null;
        /*
        * Setting public browse root in the browsegrouplist
        * attribute. The BrowseGroupList (id 0x0005) attribute
        * contains a DataElement sequence, which in turn contains
        * DataElements with UUIDs. The DataElement sequence must be
        * created before we can add DataElements to it.
        */
        elm = new DataElement(DataElement.DATSEQ);
        elm.addElement(new DataElement(
        DataElement.UUID,new UUID(0x1002)));
        /*
        * The DataElement is now prepared. It must be added to the
        * appropriate attribute ID, in this case the
        * BrowseGroupList.
        */
        sr.setAttributeValue(0x0005,elm);
        /*
        * Finally, the service record must be updated in our
        * LocalDevice.
        */
        try {
            local.updateRecord(sr);
        } catch (ServiceRegistrationException e3) {
            // Error handling code here
        }
        try {
        conn = server.acceptAndOpen();
        } catch (ServiceRegistrationException sre){
            // Error handling code here
        } catch (IOException e2) {
            // Error handling code here
        }
        /*
        * At this point a client is connected. input and output
        * streams can be obtained from the conn object,
        * communication can begin.
        */
    }
}

这是Android客户端的一部分：

package com.exampleproyect.stackoverflowclient;

import java.lang.reflect.InvocationTargetException;
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.ParcelUuid;
import android.os.Parcelable;

public class StackOverFlowClientActivity extends Activity {
    BluetoothAdapter mBluetoothAdapter;
    BluetoothDevice C702;
    BroadcastReceiver mReceiver;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        C702 = mBluetoothAdapter.getRemoteDevice("00:23:F1:27:16:DA");
        C702.fetchUuidsWithSdp();
        mReceiver = new BroadcastReceiver() {
          @Override
          public void onReceive(Context arg0, Intent intent) {
              String action = intent.getAction();
              if (BluetoothDevice.ACTION_UUID.equals(action)){
                  Parcelable[] uuidExtra =                    intent.getParcelableArrayExtra("android.bluetooth.device.extra.UUID");
                  /*uuidExtra should contain my service's UUID among his files, but it doesn't!!*/
              }
          }
      };
      // Register the BroadcastReceiver
      IntentFilter filter1 = new IntentFilter(BluetoothDevice.ACTION_UUID);
      registerReceiver(mReceiver, filter1); // Don't forget to unregister during onDestroy
    }
}

最让我困扰的是，我的计算机可以正确地看到我的JAVAME服务器广告： enter image description here

我做错了什么？ :(为什么我的电脑的蓝牙在JAVAME中正确地宣传我的服务，但Android不能？Android可以通过蓝牙连接到{ {1}}服务器？

我在StackOverFlow中已经阅读了大量其他类似的问题，但我还没有找到一个可行的解决方案。：（

我正在使用索尼爱立信C702（Java平台8）作为测试服务器。和三星Galaxy S（ICS 4.0.3，团队ICSSGS RC4.2）

EDIT1

行。

我知道问题所在。

我希望JAVAME服务器使用UUID（例如）宣传我的服务：“68EE1418-12D2-11D7-8EED-00B0D03D76EC”，但似乎代码：

JAVAME

将默认串行端口服务UUID“00001101-0000-1000-8000-00805F9B34FB”添加为ServiceClassIDList属性：

enter image description here

现在，有趣的是Android方法BluetoothDevice.fetchUuidsWithSdp（）; 似乎取了默认的“00001101-0000-1000-8000-00805F9B34FB”UUID，而不是我的“68EE1418-12D2-11D7-8EED-00B0D03D76EC”UUID，将我的服务与手机的默认串口服务重叠。

类似中世纪蓝牙网络扫描仪，它识别我的服务，但广告为“00001101-0000-1000-8000-00805F9B34FB”：

enter image description here

如何删除conURL = "btspp://localhost:68EE141812D211D78EED00B0D03D76EC;" + "authenticate=false;encrypt=false;name=MySampleApp"; server = (StreamConnectionNotifier) Connector.open(conURL);自动添加到我的服务中的额外UUID？

请帮助，谢谢！

EDIT2

好的，问题出在索尼爱立信手机上。显然，他们会在我的自定义JAVAME之前插入标准串口UUID {0x1101}，而三星和诺基亚手机会在服务记录中插入此标准UUID。 Android似乎只获取服务记录中属性UUID的第一个值，因此，将我的服务与某些设备附带的默认串行端口混淆。

所以解决方案将是：

目前的Android API是否有办法获取除0x001以外的更多servicerecord个属性？

或

有没有办法在调用“acceptAndOpen”-JAVAME-后更新存储在服务发现数据库（SDDB）上的ServiceClassID (0x001)？ - 我在servicerecord上创建了服务之后使用了LocalDevice.updateRecord，它可以在模拟器上运行，但是它会在实际设备上执行异常并且不执行任何操作。

Android蓝牙SDP无法识别JAVAME中宣传的服务

0 个答案: