有沒有人遇到任何問題使用j2me連接到藍牙服務？

Question

我一直在嘗試使用J2ME連接到藍牙服務，但我得到一個空例外...

客戶能夠識別在附近地區的設備，但不能夠連接到他們的服務。我粘貼我的密碼，如果有人能告訴我原因，以及密碼是否正確，我將非常感激。

//服務器

public void startServer() { 

    System.out.println("server is running..."); 
      UUID uuid = new UUID("1101", true); 
      String connectionString = "btspp://localhost:" + uuid +";name=Server"; 
    try { 
     // create a server connection 
     StreamConnectionNotifier notifier =(StreamConnectionNotifier) Connector.open(connectionString); 
     // accept client connections 
     StreamConnection connection = notifier.acceptAndOpen(); 

       LocalDevice localDevice = LocalDevice.getLocalDevice(); 
       stringItem.setText(localDevice.getFriendlyName()+" : "+localDevice.getBluetoothAddress()); 
       System.out.println("Address: "+localDevice.getBluetoothAddress()); 

       System.out.println("Name: "+localDevice.getFriendlyName()); 

     // prepare to send/receive data 
     byte buffer[] = new byte[100]; 
     String msg = "hello there, client"; 
     InputStream is = connection.openInputStream(); 
     OutputStream os = connection.openOutputStream(); 
     // send data to the client 
     os.write(msg.getBytes()); 
     // read data from client 
     is.read(buffer); 
       int len = is.available(); 

       stringItem.setText(Integer.toString(len)); 
     connection.close(); 
    } catch(IOException e) { 
     e.printStackTrace(); 
    } 

} 

//客戶

private void deServiceSearch(RemoteDevice device) { 
    //int[] attr={10203040607040A1B1C1DE100}; 
System.out.println("TEst4.."); 
    setError("2"); 
    UUID[] uuids = new UUID[1]; 
    uuids[0] = new UUID(1101); 


    try { 

     System.out.println("TEst6.."); 

     UUID[] uuidSet = new UUID[1]; 

     uuidSet[0]=new UUID("1101",false); 

     System.out.println("\nSearching for service..."); 
     setError("3"); 
     agent.searchServices(null,uuidSet,device,this); 

    } catch (BluetoothStateException ex) { 
     setError("4"); 
    } 
} 

Answer 1

你要在其中獲取服務的屬性指定null。請設置屬性，如下所示。

//搜索服務

public void doServiceSearch(RemoteDevice device){ 
    //0x100 - Service name attribute 
    //0x101 - Service Description attribute 
    //0x102 - Provider Name attribute 
    //0x1002 - return all the services that are public browseable 
    int[] attributes = {0x100,0x101,0x102}; 
    UUID[] uuids = new UUID[1]; 
    uuids[0] = new UUID(0x1002); 
    try{ 
     agent.searchServices(attributes, uuids, device, this); 
    }catch(BluetoothStateException bse){ 
     bse.printStackTrace(); 
    } 
}