Android应用程序上的Java套接字异常，需要帮助吗？

Question

I am trying to develop an Android application but I am running into some problems trying to get my phone to connect to my server. Originally when trying to connect to my Server I got an IOException which I finally resolved by putting permissions in the manifest. Now I am getting an Socket Exception: "Connection Refused", I am completely sure that the Server is listening as I can run another program on my computer in just plain java that connects to the server and it works fine. I have run the client application on both the emulator and my actual phone (on my WiFi network) with both the IP address of my computer and "localhost". My question is if anyone has an idea as of why this is happening. This is some of the code:

Client:

package com.patyo.money4free;

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.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Tutorial_Accountname extends Activity{
    Button bSubmit;
    EditText Account,ConfirmAccount;
    TextView ErrorText;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tutorial_accountname);

    bSubmit = (Button) findViewById (R.id.AccountNameSubmitButton);
    Account = (EditText) findViewById (R.id.AccountName);
    ConfirmAccount = (EditText) findViewById (R.id.ConfirmAccountName);
    ErrorText = (TextView) findViewById (R.id.AccountNameErrorText);

    if(!TutorialGolbals.Username.equals(""))
    {
        Account.setText(TutorialGolbals.Username);
        ConfirmAccount.setText(TutorialGolbals.Username);
    }


    bSubmit.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            String username = Account.getText().toString();
            String confusername = ConfirmAccount.getText().toString();

            if(username.equals(confusername)){
                if(username.equals(""))
                {
                    ErrorText.setTextColor(Color.RED);
                    ErrorText.setText("Username Field is Empty!");
                }else{
                    ErrorText.setText("Testing Account...");
                    BufferedReader in = null;
                    PrintWriter out = null;
                    Socket connection = null;
                    try {
                        //This is where it throws exception
                        connection = new Socket(Server_Globals.address,Server_Globals.port_create);
                        in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                        out = new PrintWriter(connection.getOutputStream(), true);
                    } catch (UnknownHostException e) {
                        ErrorText.setTextColor(Color.RED);
                        ErrorText.setText("Sorry, Cannot Connect to Server");
                        return;
                    } catch (IOException e) {
                        ErrorText.setTextColor(Color.RED);
                        ErrorText.setText("Sorry, Cannot Connect to Server");
                        return;
                    }
                    String s = "";
                    s+="Try Account\r\n";
                    s+=username+"\r\n";
                    out.write(s);
                    out.flush();
                    boolean reading = true;
                    String response = null;
                    try {
                        while(reading){
                                if(in.ready())
                                {
                                    response = in.readLine();
                                    reading = false;
                                }
                        }
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                        reading = false;
                        ErrorText.setTextColor(Color.RED);
                        ErrorText.setText("Sorry, Cannot Connect to Server");
                    }

                    if(response.equals("TRUE")){
                        Intent nextArea = new Intent("com.patyo.money4free.TUTORIALEMAIL");
                        TutorialGolbals.Username = username;
                        startActivity(nextArea);
                    }
                    else if(response.equals("FALSE")){
                        ErrorText.setTextColor(Color.RED);
                        ErrorText.setText("Someone Already Has That Username!");
                    }
                }
            }else{
                ErrorText.setTextColor(Color.RED);
                ErrorText.setText("Usernames are Not the Same!");
            }
        }
    });
}
}

The Part of the Server that looks for connections:

package com.patyo.money4free.server;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class Lookout_CreateAccount {

private static final int port = 5222;
public static void main(String[] args) {
    ServerSocket server = null;
    Socket buffer = null;
    try {
        server = new ServerSocket(port);
        System.out.println("Server Started...");
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.exit(-1);
    }
    while(true)
    {
        try {
            buffer = server.accept();
            System.out.println("Server Accepted Client");
            Thread buff = new Thread(new CreateAccountHandler(buffer));
            buff.start();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}

}

Answer 1

连接被拒绝可能是由防火墙引起的，如果我是您，我将尝试在服务器上禁用防火墙，然后再试一次，直到我在开放的ipadress上运行服务器之前，我都遇到了同样的问题