實現Socket聊天其實質就是一個Socket的雙向通訊，分為服務端和客戶端，都是 需要得到一個socket物件,通過socket獲取流得到我們需要的資料。
標準的寫法都是開啟一個while（true）的執行緒不斷的去監聽接收訊息，另外啟一個執行緒去傳送訊息。為了方便演示效果這裡寫了一個Winform應用作為服務端。客戶端和服務端的程式碼基本上完全相同。下面給出
android收發資料主要程式碼。

接收資料:

    private class ReceiveThread extends Thread {
        private InputStream inStream = null
 
;
        private byte[] buffer;
        private String str = null;
        ReceiveThread(Socket socket) {
            try {
                inStream = socket.getInputStream();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        @Override
 

        public void run() {
            while (true) {
                buffer = new byte[512];
                try {
                    inStream.read(buffer);//讀流方式應該和傳送一致
                                        //（read、readUTF）,否則阻塞
                } catch (IOException e) {
                    // TODO Auto-generated catch block
 

                    e.printStackTrace();
                }
                try {
                    str = new String(buffer, "UTF-8").trim();
                } catch (UnsupportedEncodingException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                if (buffer.length > 0) {
                    Message msg = Message.obtain();
                    msg.obj = str;
                    msg.what = MSG_REC;
                    myHandler.sendMessage(msg);//將獲取的資料傳送出去
                }
            }
        }
    }

傳送資料：

    Runnable sendThread = new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            byte[] sendBuffer = null;
            try {
                sendBuffer = strMessage.getBytes("UTF-8");
            } catch (UnsupportedEncodingException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            try {
                outStream = socket.getOutputStream();
                Message msg = Message.obtain();
                msg.obj = strMessage;
                msg.what = MSG_SEND;
                myHandler.sendMessage(msg);

            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                outStream.write(sendBuffer);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    };

來看看效果吧：
android：