Question

我对编码很新，特别是Java，所以如果我错过任何根本明显的东西，我道歉。以外行人的方式回答会有所帮助。

我正在尝试在使用android作为客户端的智能手机和使用Netbeans的笔记本电脑上的服务器之间设置客户端 - 服务器。我设法从电话到服务器进行通信，但是我需要服务器以某种形式的通信进行响应，这是我的问题所在。

我一直在使用一个给我的例子作为我的基础，双向通信适用于netbeans中的客户端和服务器（下面的代码）。我一直在尝试调整android的netbeans客户端代码以相同的方式运行，没有运气。任何帮助，将不胜感激。

这是笔记本电脑的工作服务器代码：

package myserver2;

import java.io.*;
import java.net.*;

public class MyServer2 {

int port = 8989;

public static void main(String[] args) throws Exception
{
    MyServer2 SERVER = new MyServer2();
    SERVER.run();
}


public void run() throws Exception
{
   ServerSocket SRVSOCK = new ServerSocket(port);
   SRVSOCK.setReuseAddress(true);
   Socket SOCK = SRVSOCK.accept();
   InputStreamReader IR = new InputStreamReader(SOCK.getInputStream());
   BufferedReader BR = new BufferedReader(IR);

   String MESSAGE = BR.readLine();
   System.out.println(MESSAGE);

   if(MESSAGE != null)
   {
       PrintStream PS = new PrintStream(SOCK.getOutputStream());
       PS.println("MESSAGE recieved!");
   }
}

}

这也是笔记本电脑上正在运行的客户端代码：

package myserver2;

import java.io.*;
import java.net.*;


public class MyClient2 {


public static void main(String[] args) throws Exception
{
    MyClient2 CLIENT = new MyClient2();

    CLIENT.run();
}

public void run() throws Exception
{
    Socket SOCK = new Socket("192.168.0.4", 8989);
    PrintStream PS = new PrintStream(SOCK.getOutputStream());
    PS.println("Hello to SERVER from CLIENT.\n");

    InputStreamReader IR = new InputStreamReader(SOCK.getInputStream());
    BufferedReader BR = new BufferedReader(IR);

    String MESSAGE = BR.readLine();
    System.out.println(MESSAGE);
}
}

最后这里是没有工作的android代码：

package com.example.sebastian.myserver3;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;


import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;



public class MainActivity extends Activity {

private Socket client;
private PrintWriter printwriter;
private EditText etMsg, etIP, etPort;
private Button button;
private String message;
int port = 0;
private TextView responseText;



private static final String TAG = "ResponseMessages";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

   Log.i(TAG,  "Just checking logs worked");


 //      etIP = (EditText) findViewById(R.id.editText1);
   //     etPort = (EditText) findViewById(R.id.editText2);
    etMsg = (EditText) findViewById(R.id.editText3);
    button = (Button) findViewById(R.id.button1);
    responseText = (TextView) findViewById(R.id.responseText);

    button.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            message = etMsg.getText().toString();
            etMsg.setText(" ");
            port = Integer.parseInt("8989");
            Toast.makeText(getApplicationContext(), "Message was sent",  Toast.LENGTH_LONG).show();

            new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        client = new Socket("192.168.0.4", port);

                        printwriter = new PrintWriter(client.getOutputStream());
                        Log.i(TAG, "The message sent was " + message);
                        printwriter.write(message);

                        printwriter.flush();
                        printwriter.close();


                        InputStreamReader IR = new InputStreamReader(client.getInputStream());
                        BufferedReader BR = new BufferedReader(IR);
                        StringBuilder total = new StringBuilder();
                        String line;

                        try{
                            while((line = BR.readLine()) != null){
                                total.append(line);
                                responseText.setText(total);
                            }
                        }catch (IOException e){
                            e.printStackTrace();
                        }




//                            String MESSAGE = BR.toString();
//                            Log.i(TAG,  "The message received was " + MESSAGE);
//                            Toast.makeText(getApplicationContext(), "This is also a toast!", Toast.LENGTH_LONG).show();
//                            responseText = (TextView) findViewById(R.id.responseText);
//                            responseText.setText(MESSAGE);


                        client.close();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                }
            }).start();
        }
    });

}


}

我试图在Logcat，totast和textview中显示图像，我似乎无法实现任何目标。我认为该消息未被正确接收，因此无法显示。因为我尝试了很多不同的东西而没有运气，所以android代码可能已经到处都是。我发布的代码就是我碰壁的地方，需要一些帮助。

感谢任何回复的人。

Android客户端（智能手机）和Netbeans服务器（笔记本电脑）之间的双向套接字通信

0 个答案: