how to send byte array through bluetooth???

[itskrishnaraj]

hi code tiger

i just want to know how to send a byte array through bluetooth connection , i m doing an application in that i have to send a byte array to the other mobile how the sending and recieving occuring ..i got a sample code, in that its sending a string . i jus want to send a byte array ,in example code they are using streamconnnection


-----------------------client send a string when connected-------------------

Code: Select all

StreamConnection conn = null;
         try {
                    string msg = "hello world";
                    conn = (StreamConnection)Connector.open(serviceUrl);
                    OutputStream output = conn.openOutputStream();         
                    output.write(msg);     
                    output.write(msg.getBytes());       
                    output.close();       
         
           System.out.println(readData(conn));   
          
          
         } catch (Exception ex) {
            System.out.println(ex);
         }


-----------------------server replaying for the msg "hello world" ------------

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// Pauses thread until Transmission occurs
      conn = notifier.acceptAndOpen();       
     

      // Read Data Transmission
      String msg = readData(conn);       
      System.out.println("Received Message from Client: " + msg);

      // Send Back a Message
      msg = "Hello Back from Server";       
      output = conn.openOutputStream();       
      output.write(msg.length()); // length is 1 byte     
     output.write(msg.getBytes());     
     //output.close();   


--------------read data()--------------

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public final static String readData(StreamConnection conn) {      //kris
         
          InputStream input = null;
          byte[] data = null;   
         
          try {                   
            input = conn.openInputStream();
           
            // Probably want to throw an exception if length is not greater then 0
            int length = input.read();       
            data= new byte[length];
            length = 0;

            // Assemble data
            while (length != data.length) {     
              int ch = input.read(data, length, data.length - length);
              if (ch == -1) {
                throw new IOException("Can't read data");
              }
              length += ch;
            }     

          } catch (IOException e) {
            System.err.println(e);
          } finally {       
             
            // close input stream   
            if (input != null) {
              try {
                input.close();
              } catch (IOException e) {}
            }
          }
          return new String(data);       
        }   


pls sort it out

thanks in advance

[itskrishnaraj]

got solution dear

data send to server

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public void sendToServer(byte[] movedata)
    {
       try
       {
          conn=null;
          conn = (StreamConnection)Connector.open(serviceUrl);
          OutputStream output = conn.openOutputStream();
          output.write(movedata);
        
          int moveLen = movedata.length;
          System.out.println("After Written2: moveLen: " + moveLen);
        
          for ( int i = 0; i < moveLen; i++ )
          {               
             System.out.println("send Data =" + movedata[i]);
          }
       }catch(IOException ioe){}
        
    }

read the data

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public byte[] readData(StreamConnection conn)
    {
       InputStream input = null;
       byte[] data = null; 
       StringBuffer bufferVal = new StringBuffer();
       int ch;
      
       try
       {                   
          input = conn.openInputStream();
          // Probably want to throw an exception if length is not greater then 0
          int length = 5;       
          data= new byte[length];
          length = 0;
         
          while ( ( ch = input.read() ) != -1 )
           {
             bufferVal.append((char) ch);
           }
          
           System.out.println(" not null");
          data = bufferVal.toString().getBytes();
       } catch (IOException e)
       {
          System.err.println(e);
       } finally
       {       
             
            // close input stream   
            if (input != null) {
              try {
                input.close();
              } catch (IOException e) {}
            }
          }
          return data;       
        }   


------------------------read the data --------------

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                                    byte[] receive=new byte[5];
         receive=readData(conn);
         int recieve_len=receive.length;
         
         for(int j=0;j<recieve_len;j++)
         {
            System.out.println("recieved data-----> "+receive[j]);
         }

[DevelopmentTeam]

Wow, Thanks for your update. Anyway... It might be useful for the others

[richermartyn]

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[robbinhood]

To send the byte array through the bluetooth . There should be have software to convert the file into the bytes. while sending all the at the same time instead of this send single. You are trying to send a complete screen shot every second? I guess the first thing to consider . Just sending difference frames but you would want to find a native method to do that presumably.