Question

我正在编写简单的软件，PC是套接字服务器，android连接到它，然后我在PC上的键盘上写的任何东西，android得到它并只是记录。

Android代码： package com.example.socket;

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

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends Activity {


protected void onCreate(Bundle savedInstanceState) {


        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;

        try {
            echoSocket = new Socket("192.168.2.3", 4444);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(
                    echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            Log.e("j", "Don't know about host: JANIPC.");
            System.exit(1);
        } catch (IOException e) {
            Log.e("j", "Can't connect to Jani-PC");
            System.exit(1);
        }

        try {
        BufferedReader stdIn = new BufferedReader(new InputStreamReader(
                echoSocket.getInputStream()));
        String userInput;


            while ((userInput = stdIn.readLine()) != null) {
                //out.println(userInput);
                Log.e("j", "echo: " + in.readLine());
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }



    }


}

这是我的PC Java代码：

package jani.study.socketserver;


import java.io.*;
import java.net.*;
/**
 *
 * @author Jani
 */
public class Main {
public static void main(String[] args) throws IOException, InterruptedException {
   ServerSocket serverSocket = null;
    try {
        serverSocket = new ServerSocket(4444);
    } catch (IOException e) {
        System.err.println("Could not listen on port: 4444.");
        System.exit(1);
    }

    Socket clientSocket = null;
    try {
        clientSocket = serverSocket.accept();
    } catch (IOException e) {
        System.err.println("Accept failed.");
        System.exit(1);
    }

    PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
    BufferedReader in = new BufferedReader(
            new InputStreamReader(
            System.in));
    String inputLine;

    System.out.println("Connected!");
    /*while ((inputLine = in.readLine()) != null) {
         out.println(inputLine);

    }*/
    Thread.sleep(1000);
    out.println("1");
    Thread.sleep(1000);
    out.println("2");
    Thread.sleep(1000);
    out.println("3");
    Thread.sleep(1000);
    out.println("4");
    Thread.sleep(1000);
    out.println("5");
    Thread.sleep(1000);
    out.println("6");
    out.close();
    in.close();
    clientSocket.close();
    serverSocket.close();
}


}

在Android调试器中，我只收到每一秒请求，我的意思是，我只得到：回声：2 回声：4 回声：6

我做错了什么？请帮忙

Answer 1

您正在使用两个BufferedReader，一个in和一个stdIn都从套接字读取。您首先在while循环中使用当前行，然后使用Log语句中的下一行。

试试这个：

Log.e("j", "echo: " + userInput);

Answer 2

您在阅读器中拨打readLine两次，并仅将所有其他来电的结果打印到readLine。你可能想要：

        while ((userInput = stdIn.readLine()) != null) {
            //out.println(userInput);
            Log.e("j", "echo: " + userInput);
        }

在android上的socket，每一秒请求都会消失

2 个答案: