尝试根据本教程进行android socket编程 http://examples.javacodegeeks.com/android/core/socket-core/android-socket-example/
我关闭了防火墙并禁用了防病毒软件。如果我将我的服务器地址设置为 127.0.0.1，我会得到标题中的错误。如果我将它作为我的本地 IP 地址，它就位于将要创建的套接字上。我已经尝试过不使用和使用端口转发并将其设置为相同的端口。
客户端
package com.bennatpjose.androidsocketclient;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private Socket socket;
private TextView text;
private static final int SERVERPORT = 5000;
private static final String SERVER_IP = "10.52.7.179";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
text = (TextView) findViewById(R.id.textView1);
new Thread(new ClientThread()).start();
text.setText(text.getText().toString()+"Client Thread should be fired");
}
public void onClick(View view) {
try {
EditText et = (EditText) findViewById(R.id.EditText01);
String str = et.getText().toString();
text.setText(text.getText().toString()+"\n"+"Click Event "+str);
PrintWriter out = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(socket.getOutputStream())),
true);
text.setText(text.getText().toString()+"\n"+"Next is out.println("+str+")");
out.println(str);
text.setText(text.getText().toString()+"\n"+"out.println("+str+")");
} catch (UnknownHostException e) {
text.setText(text.getText().toString()+"\nPrint Writer UnknownHostException "+e.toString());
} catch (IOException e) {
text.setText(text.getText().toString()+"\nPrint Writer IOException "+e.toString());
} catch (Exception e) {
text.setText(text.getText().toString()+"\nPrint Writer Exception "+e.toString());
}
}
class ClientThread implements Runnable {
@Override
public void run() {
text.setText(text.getText().toString()+"\nInside client thread run method ");
try {
InetAddress serverAddr = InetAddress.getByName(SERVER_IP);
//If I set address to my local ip it just sits here and doesn't show socket created.
text.setText(text.getText().toString()+"\n"+serverAddr +" Socket going to be Created");
socket = new Socket(serverAddr, SERVERPORT);
text.setText(text.getText().toString()+"\n"+socket.toString() +"Socket Created");
} catch (UnknownHostException e1) {
text.setText(text.getText().toString()+"\nClient Thread UnknownHostException "+e1.toString());
} catch (IOException e1) {
text.setText(text.getText().toString()+"\nClient Thread IOException "+e1.toString());
}catch (Exception e1) {
text.setText(text.getText().toString()+"\nClient Thread Exception "+e1.toString());
}
}
}
服务器
package com.bennatpjose.androidsocketserver;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;
public class MainActivity extends Activity {
private ServerSocket serverSocket;
Handler updateConversationHandler;
Thread serverThread = null;
private TextView text;
public static final int SERVERPORT = 6000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
text = (TextView) findViewById(R.id.text2);
text.setText(text.getText().toString()+"onCreate method started");
updateConversationHandler = new Handler();
this.serverThread = new Thread(new ServerThread());
this.serverThread.start();
text.setText(text.getText().toString()+"\n"+"serverThread started");
}
@Override
protected void onStop() {
super.onStop();
try {
serverSocket.close();
text.setText("!!Socket Stopped!!");
} catch (IOException e) {
e.printStackTrace();
}
}
class ServerThread implements Runnable {
public void run() {
Socket socket = null;
try {
serverSocket = new ServerSocket(SERVERPORT);
} catch (IOException e) {
e.printStackTrace();
}
while (!Thread.currentThread().isInterrupted()) {
try {
socket = serverSocket.accept();
text.setText(text.getText().toString()+socket+"\n");
CommunicationThread commThread = new CommunicationThread(socket);
new Thread(commThread).start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
class CommunicationThread implements Runnable {
private Socket clientSocket;
private BufferedReader input;
public CommunicationThread(Socket clientSocket) {
this.clientSocket = clientSocket;
try {
this.input = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));
} catch (IOException e) {
e.printStackTrace();
}
}
public void run() {
while (!Thread.currentThread().isInterrupted()) {
try {
String read = input.readLine();
updateConversationHandler.post(new updateUIThread(read));
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
class updateUIThread implements Runnable {
private String msg;
public updateUIThread(String str) {
this.msg = str;
}
@Override
public void run() {
text.setText(text.getText().toString()+"Client Says: "+ msg + "\n");
}
}
}
最佳答案
所以我想通了。我犯的一个错误是用我的本地 ip 替换 SERVER_IP，因为它是一个特殊的环回地址 android 模拟器，我应该把它留在 10.0.2.2。 10.0.2.2 主机环回接口(interface)的特殊别名(即开发机器上的 127.0.0.1)
您还必须先运行服务器，设置端口重定向，然后再运行客户端。
在 http://developer.android.com/tools/devices/emulator.html 查找模拟器网络部分
关于java - IOException java.net.ConnectException : failed to connect to/127. 0.0.1(端口 5000):连接失败:ECONNREFUSED(连接被拒绝)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28590366/