Sprawdź, czy numer SPP UUID 00001101-0000-1000-8000-00805F9B34FB istnieje na serwerze

Question

Używam komputera z systemem Windows 7 jako serwera. Kod:

public class PCSPPServer { 
    //start server 
    private void startServer() throws IOException{ 

     //Create a UUID for SPP 
     UUID uuid = new UUID("1101", true); 
     //Create the servicve url 
     String connectionString = "btspp://localhost:" + uuid +";name=Sample SPP Server"; 

     //open server url 
     StreamConnectionNotifier streamConnNotifier = (StreamConnectionNotifier)Connector.open(connectionString); 

     //Wait for client connection 
     System.out.println("\nServer Started. Waiting for clients to connect..."); 
     StreamConnection connection=streamConnNotifier.acceptAndOpen(); 

     RemoteDevice dev = RemoteDevice.getRemoteDevice(connection); 
     System.out.println("Remote device address: "+dev.getBluetoothAddress()); 
     System.out.println("Remote device name: "+dev.getFriendlyName(true)); 

     //read string from spp client 
     InputStream inStream=connection.openInputStream(); 
     BufferedReader bReader=new BufferedReader(new InputStreamReader(inStream)); 
     String lineRead=bReader.readLine(); 
     System.out.println(lineRead); 

     //send response to spp client 
     OutputStream outStream=connection.openOutputStream(); 
     PrintWriter pWriter=new PrintWriter(new OutputStreamWriter(outStream)); 
     pWriter.write("Response String from SPP Server\r\n"); 
     pWriter.flush(); 

     pWriter.close(); 
     streamConnNotifier.close(); 

    } 


    public static void main(String[] args) throws IOException { 

     //display local device address and name 
     LocalDevice localDevice = LocalDevice.getLocalDevice(); 
     System.out.println("Address: "+localDevice.getBluetoothAddress()); 
     System.out.println("Name: "+localDevice.getFriendlyName()); 

     PCSPPServer sampleSPPServer=new PCSPPServer(); 
     sampleSPPServer.startServer(); 

    } 
} 

I HTC Desire jako klienta. Kod:

public class MainActivity extends Activity { 

    TextView out; 
    private static final int REQUEST_ENABLE_BT = 1; 
    private BluetoothAdapter btAdapter = null; 
    private BluetoothSocket btSocket = null; 
    private OutputStream outStream = null; 

    // Well known SPP UUID 
    private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); 

    // Insert your server's MAC address 
    private static String address = "00:15:83:0C:BF:EB"; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     out = (TextView) findViewById(R.id.out); 

     out.append("\n...In onCreate()..."); 

     btAdapter = BluetoothAdapter.getDefaultAdapter(); 
     CheckBTState(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.activity_main, menu); 
     return true; 
    } 

    @Override 
     public void onStart() { 
     super.onStart(); 
     out.append("\n...In onStart()..."); 
     } 

     @Override 
     public void onResume() { 
     super.onResume(); 

     out.append("\n...In onResume...\n...Attempting client connect..."); 

     // Set up a pointer to the remote node using it's address. 
     BluetoothDevice device = btAdapter.getRemoteDevice(address); 

     // Two things are needed to make a connection: 
     // A MAC address, which we got above. 
     // A Service ID or UUID. In this case we are using the 
     //  UUID for SPP. 
     try { 
      btSocket = device.createRfcommSocketToServiceRecord(MY_UUID); 
     } catch (IOException e) { 
      AlertBox("Fatal Error", "In onResume() and socket create failed: " + e.getMessage() + "."); 
     } 

     // Discovery is resource intensive. Make sure it isn't going on 
     // when you attempt to connect and pass your message. 
     btAdapter.cancelDiscovery(); 

     // Establish the connection. This will block until it connects. 
     try { 
      btSocket.connect(); 
      out.append("\n...Connection established and data link opened..."); 
     } catch (IOException e) { 
      try { 
      btSocket.close(); 
      } catch (IOException e2) { 
      AlertBox("Fatal Error", "In onResume() and unable to close socket during connection failure" + e2.getMessage() + "."); 
      } 
     } 

     // Create a data stream so we can talk to server. 
     out.append("\n...Sending message to server..."); 

     try { 
      outStream = btSocket.getOutputStream(); 
     } catch (IOException e) { 
      AlertBox("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + "."); 
     } 

     String message = "Hello from Android.\n"; 
     byte[] msgBuffer = message.getBytes(); 
     try { 
      outStream.write(msgBuffer); 
     } catch (IOException e) { 
      String msg = "In onResume() and an exception occurred during write: " + e.getMessage(); 
      if (address.equals("00:00:00:00:00:00")) 
      msg = msg + ".\n\nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 37 in the java code"; 
      msg = msg + ".\n\nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server.\n\n"; 

      AlertBox("Fatal Error", msg);  
     } 
     } 

     @Override 
     public void onPause() { 
     super.onPause(); 

     out.append("\n...In onPause()..."); 

     if (outStream != null) { 
      try { 
      outStream.flush(); 
      } catch (IOException e) { 
      AlertBox("Fatal Error", "In onPause() and failed to flush output stream: " + e.getMessage() + "."); 
      } 
     } 

     try  { 
      btSocket.close(); 
     } catch (IOException e2) { 
      AlertBox("Fatal Error", "In onPause() and failed to close socket." + e2.getMessage() + "."); 
     } 
     } 

     @Override 
     public void onStop() { 
     super.onStop(); 
     out.append("\n...In onStop()..."); 
     } 

     @Override 
     public void onDestroy() { 
     super.onDestroy(); 
     out.append("\n...In onDestroy()..."); 
     } 

     private void CheckBTState() { 
     // Check for Bluetooth support and then check to make sure it is turned on 

     // Emulator doesn't support Bluetooth and will return null 
     if(btAdapter==null) { 
      AlertBox("Fatal Error", "Bluetooth Not supported. Aborting."); 
     } else { 
      if (btAdapter.isEnabled()) { 
      out.append("\n...Bluetooth is enabled..."); 
      } else { 
      //Prompt user to turn on Bluetooth 
      Intent enableBtIntent = new Intent(btAdapter.ACTION_REQUEST_ENABLE); 
      startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); 
      } 
     } 
     } 

     public void AlertBox(String title, String message){ 
     new AlertDialog.Builder(this) 
     .setTitle(title) 
     .setMessage(message + " Press OK to exit.") 
     .setPositiveButton("OK", new OnClickListener() { 
      public void onClick(DialogInterface arg0, int arg1) { 
       finish(); 
      } 
     }).show(); 
     } 
    } 

Próbowałem to zarówno Windows 7 32bit& 64bit. Używam telefonu HTC Desire Android v2.3.3.

Przy próbie podłączenia klienta do serwera i spróbować napisać dowolny tekst używając OutputStream, pojawia się błąd:

Check that the SPP UUID 00001101-0000-1000-8000-00805F9B34FB exists on server

---

również dodać nowe urządzenie Bluetooth na moim komputerze.

Bluetooth Device Info:

Manufacturer: Cambridge Silicon Radio Ltd Driver Provider: Microsoft

Zobacz informacje w tym obrazie:

Daj mi znać, jeśli ktoś ma pomysł!

Answer 1

użyć DataOutputStream do napisania. Spróbuj tego:

DataOutputStream dos; 
try { 
    //outStream = btSocket.getOutputStream(); 
    dos = new DataOutputStream(btSocket.getOutputStream()); 
} catch (IOException e) { 
    AlertBox("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + "."); 
} 

//String message = "Hello from Android.\n"; 
//byte[] msgBuffer = message.getBytes(); 
try { 
    //outStream.write(msgBuffer); 
    dos.writeChar('H'); 
    dos.writeChar('i'); 
} catch (IOException e) { 
    String msg = "In onResume() and an exception occurred during write: " + e.getMessage(); 
    if (address.equals("00:00:00:00:00:00")) 
     msg = msg + ".\n\nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 37 in the java code"; 

    msg = msg + ".\n\nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server.\n\n"; 

    AlertBox("Fatal Error", msg); 
}