我正在尝试开发一个 Android 应用程序，但在尝试让我的手机连接到我的服务器时遇到了一些问题。最初在尝试连接到我的服务器时，我得到了一个 IOException，我最终通过在清单中添加权限来解决。现在我得到一个套接字异常：“连接被拒绝”，我完全确定服务器正在侦听，因为我可以在我的计算机上运行另一个程序，只用连接到服务器的普通 java，它工作正常。我已经在模拟器和我的实际手机（在我的 WiFi 网络上）上运行了客户端应用程序，同时使用了我的计算机的 IP 地址和“localhost”。我的问题是，是否有人知道为什么会发生这种情况。这是一些代码：
客户：
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!");
}
}
});
}
}
寻找连接的服务器部分：
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();
}
}
}
}