convert image into byte

[sbs]

hi all of u ,

in my project i want to transfer an image from one moblie to another mobile using bluetooth. i have written a code but giving null pointer exception at
int length = in.read(buff);

my code is :

public void imageTransfer()
    {
        System.err.println(" From image transfer ()");
        String imgName = "/Sunset.png";
        imgData = getImageData(imgName);
        sendImageData(imgData);
 
    }
 
     public byte[]  getImageData(String imgName)
    {
 
 
            in = getClass().getResourceAsStream(imgName);
 
            buff = new byte[1024];
            baos = new ByteArrayOutputStream(1024);
 
         try
        {   System.err.println(" From getImageData() try block :    ");
            int length = in.read(buff);
        }
        catch(Exception e)
        {
             e.printStackTrace();
        }
 
 
 
       try
       {
 
         while(true)
         {
 
             if(length == -1)
             {
                 break;
             }
 
             baos.write(buff,0,length);
         }
       }
        catch(Exception e)
        {
             e.printStackTrace();
        }
         return baos.toByteArray();
 
      }
 
     public void sendImageData(byte[] imgData)
      {
 
         System.err.println(" From sendImageData()");
        if(imgData == null)
        {
            return ;
        }
 
        OutputStream out = null;
 
        try
        {
            System.err.println(" From getImageData() try ");
            out = i.openOutputStream();
            out.write(imgData);
            out.flush();
 
        }
        catch(IOException e)
         {
             System.out.println(""+e.getMessage());
         }
 
         if (out != null)
         {
            try
            {
                out.close();
            }
            catch (IOException e)
            {
            }
         }
      }
 

[epots9]

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[JosAH]

hi all of u ,

in my project i want to transfer an image from one moblie to another mobile using bluetooth. i have written a code but giving null pointer exception at
int length = in.read(buff);

No need to look at the code any further: if you receive that exception on that
line of your code than 'in' equals null; no doubt about it.

kind regards,

Jos