套接字客户端android不显示收到的消息

Question

我的代码有问题 我创建了一个应用程序，通过单击

向/从服务器发送和接收消息

按钮

发送消息效果很好 但是当收到它并没有显示任何东西 我希望应用程序在与服务器发送和接收和显示消息的通信期间向我显示消息，因为我只是注意到在通信期间应用程序无法显示任何内容（吐司或更改 TextView/EditText 的文本或任何内容）期望只是接收不显示的变量数据 但我需要应用程序在与服务器通信期间做很多事情（显示吐司和打开对话框等）

点击代码：

EditText nom ; //nom= (EditText) findViewById(R.id.user); is in Oncreate methode

String name,check;
String check;
 public void click(View view) {


    name=nom.getText().toString();



    Thread t=new Thread(new Runnable() {
        @Override
        public void run() {

            Socket s;


            try {

                s = new Socket(ipadresse,Integer.parseInt(por)); 
//those 2 (ip,por) are in methode (oncreate)

                DataOutputStream dos=new DataOutputStream(s.getOutputStream());



                //emission just du nom (un exemple)
                dos.writeUTF(String.valueOf(name));
                //sending message

                //recieving a message :



                DataInputStream dis=new DataInputStream(s.getInputStream());
                check=dis.readUTF();


                //i've tried this command but not work :/ 
                //BufferedReader read=new BufferedReader(
                //new InputStreamReader(s.getInputStream()));

                //check= read.readLine();

                Log.i("message", "message recieved : "+check);

//logcat show me that the message recieved but toast doesn't 
//( in fact i didn't want toast i want to show a dialog box 
//but as a simple example i used toast)

                Toast.makeText(login.this, check, Toast.LENGTH_SHORT).show();



                dos.flush();

                //dis.close();
                dos.close();
                s.close();



            } catch (IOException e) {
                e.printStackTrace();
            }


        }
    });


    t.start();




}

这里是服务器代码：

public static void main(String[] args) {

    Thread t;


        t = new Thread(new Runnable() {
        @Override
        public void run() {
           try {
                    ServerSocket s = new ServerSocket(8080);
                    System.out.println("connecting  ... ");
                    System.out.println("-------------------");


                        while(true) 
                        {
                            Socket s1= s.accept(); 

                           DataInputStream dis=new DataInputStream(s1.getInputStream());

                           DataOutputStream dos=new DataOutputStream(s1.getOutputStream());


                            String message;





                              message=dis.readUTF();

                           System.out.println(message);   


                           //this message does't displayed in the app (i've edited the program just to simplify it)    
                           dos.writeUTF("hello");



                            dis.close();
                            s1.close();
                        }


                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        }
        });
    t.start();
}

Answer 1

可能来自您服务器的消息延迟返回（不是实时的）。 尝试制作循环：

boolean getmessage = false;
    while(!getmessage){
        try{
            check=dis.readUTF();
        }
        catch(Exception e){
            Log.d("dis", e.getMessage());
        }
        if(check != null){
            getmessage = true;
            makeToast("23");
        }
    }