java How to send a multiple images over socket

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Java

Mobile

Android

sockets

send multiple images over socket from java server to android client,trouble that you'll see just last image.
My big problem that i send multiple images from java server to android clent over socket and all the images sending fine, but the problem with receive them, i see just the last one .

Server java side :

//during the connecting
private void whileConnecting() throws IOException, AWTException, InterruptedException {  
    int i=0;
    while(i<5){
    System.out.println("i = " + i);
    capture = robot.createScreenCapture(screenRectangle);
    baos = new ByteArrayOutputStream();
    ImageIO.write(capture, "png", baos);
    baos.flush();
    System.out.println("Size of baos = " + baos.size());
    byte[] buffer = baos.toByteArray();
    baos.close();
    baos = null;
    output.writeObject(buffer);
    output.flush();
    i++;
    Thread.sleep(1000);
    }
}

Client android Side :

try {
       connection = new Socket(getIntent().getStringExtra("ip"), 8080);
       input = new ObjectInputStream(connection.getInputStream());
       int i = 0;
       while (i < 5) {
           i++;
           buffer = (byte[]) input.readObject();
           Toast.makeText(getApplicationContext(), "buffer length = " + buffer.length, Toast.LENGTH_LONG).show();
               //screenCapture.setImageBitmap(BitmapFactory.decodeByteArray(buffer, 0, buffer.length));
           }
         } catch (ClassNotFoundException e) {
           e.printStackTrace();
         } catch (IOException e) {
           e.printStackTrace();
         }finally {
         try {
             connection.close();
         } catch (IOException e) {
             Toast.makeText(getApplicationContext(), "Error with closing connection", Toast.LENGTH_LONG).show();
         }
     }  

all the images are sent successfuly , i saw the size of them on toast message and that truth, but the problem that i saw just the last image ! why, i think that should i use syncTask or something like that but i dont know how :(
can someone help pleas ?