【发布时间】：2018-05-07 13:22:17
【问题描述】：
我在安卓设备上使用以下代码作为客户端
/*
* This is a simple Android mobile client
* This application read any string message typed on the text field and
* send it to the server when the Send button is pressed
*/
package lakj.comspace.simpleclient;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class SimpleClientActivity extends Activity {
private Socket client;
private PrintWriter printwriter;
private EditText textField;
private Button button;
private String messsage;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textField = (EditText) findViewById(R.id.editText1); //reference to the text field
button = (Button) findViewById(R.id.button1); //reference to the send button
// Button press event listener
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
messsage = textField.getText().toString(); //get the text message on the text field
textField.setText(""); //Reset the text field to blank
try {
client = new Socket("10.0.2.2", 4444); //connect to server
printwriter = new PrintWriter(client.getOutputStream(),true);
printwriter.write(messsage); //write the message to output stream
printwriter.flush();
printwriter.close();
client.close(); //closing the connection
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
并作为简单的java项目作为服务器端
/*
* This is a simple server application
* This server receive a string message from the Android mobile phone
* and show it on the console.
* Author by Lak J Comspace
*/
package simpleserver;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
public class Main {
private static ServerSocket serverSocket;
private static Socket clientSocket;
private static InputStreamReader inputStreamReader;
private static BufferedReader bufferedReader;
private static String message;
public static void main(String[] args) {
try {
serverSocket = new ServerSocket(4444); //Server socket
} catch (IOException e) {
System.out.println("Could not listen on port: 4444");
}
System.out.println("Server started. Listening to the port 4444");
while (true) {
try {
clientSocket = serverSocket.accept(); //accept the client connection
inputStreamReader = new InputStreamReader(clientSocket.getInputStream());
bufferedReader = new BufferedReader(inputStreamReader); //get client msg
message = bufferedReader.readLine();
System.out.println(message);
inputStreamReader.close();
clientSocket.close();
} catch (IOException ex) {
System.out.println("Problem in message reading");
}
}
}
}
我使用简单的按钮将字符串从 Android Emulator 发送到 java 应用程序，但它给出了连接错误。我应该使用哪个端口和 ip 而不是代码中提到的...以及如何获得它，请帮助我
如何修改此代码以将手机联系人从 android 发送到 PC？？
【问题讨论】：
-
联系开发机器的特殊10.0.2.2地址只能在模拟器上使用，不能在物理android设备上使用。此外，这个问题应该关闭，因为它与许多其他问题重复。
-
它给出了什么连接错误？