通过单击按钮将文本消息从 java 服务器发送到 android 客户端使用套接字

Question

I need to send a text message from core java server to android client by clicking on a button. However, it does not show an error, and the message is not sent to client side.

Server side button code:

private void msg_sendActionPerformed(java.awt.event.ActionEvent evt)   {                                         
// TODO add your handling code here:
    String msgout="";
    msgout=msg_text.getText().toString();
    try{
        dout.writeUTF(msgout);
        //printWriter.write(msgout + "\n");
        System.out.printf(msgout);
        //printWriter.flush();
    }catch(Exception e){

    }
} 

Client side code:

Thread r = new Thread(new Runnable() {
    @Override
    public void run() {
        try {
            s = new Socket("192.168.1.5", 1201);
            // din=new DataInputStream(s.getInputStream());
            inputStreamReader = new InputStreamReader(s.getInputStream());
            bufferedReader = new BufferedReader(inputStreamReader);

            dataout = new DataOutputStream(s.getOutputStream());
            String message = "";
            while (!message.equals("exit")) {
                //msgin=din.readUTF();
                message = bufferedReader.readLine();

                msg_area.setText(msg_area.getText().toString() + "\n       Server:\t" + message);
            }
        } catch (Exception e) {
            Toast.makeText(getApplicationContext(), "Exception-->" + e.getMessage(), Toast.LENGTH_SHORT).show();

        }
    }
});
r.start();

Answer 1

readLine() reads lines. You aren't sending a line. You're sending with writeUTF() , which uses a special format, documented in the Javadoc. Either send lines or use readUTF) .