1
我是新来的android，java和套接字编程，所以当然我试图合并所有三个！套接字超时问题：Android客户端从PC服务器读取数据
我正在创建一个基于桌面的java服务器，它将简单地发送一个短的字符串到android应用程序（客户端）。
我有Android应用程序运行良好，它发送字符串到服务器读取没有问题。
我有服务器运行，它收到的字符串没有问题。
但是，每当我尝试读取从服务器返回的字符串时，应用程序（客户端）都会有套接字超时。我使用相同的代码，所以我不明白这个问题。
反正这里的代码：
//SERVER//
import java.io.*;
import java.net.*;
import java.util.*;
public class GpsServer {
ServerSocket serversocket = null;
Socket socket = null;
public GpsServer()
{
try
{
serversocket = new ServerSocket(8189);
}
catch (UnknownHostException unhe)
{
System.out.println("UnknownHostException: " + unhe.getMessage());
}
catch (InterruptedIOException intioe)
{
System.out.println("Timeout while attempting to establish socket connection.");
} catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
}
public void refreshServer() {
try
{
socket = serversocket.accept();
InputStreamReader inputstreamreader = new InputStreamReader(socket.getInputStream());
BufferedReader bufferedreader = new BufferedReader(inputstreamreader);
PrintWriter printwriter = new PrintWriter(socket.getOutputStream(),true);
System.out.println("socket read successful");
printwriter.println("Send Bye to disconnect.");
String lineread = "";
boolean done = false;
while (((lineread = bufferedreader.readLine()) != null) && (!done)){
System.out.println("Received from Client: " + lineread);
printwriter.println("You sent: " + lineread);
if (lineread.compareToIgnoreCase("Bye") == 0) done = true;
}
System.out.println("Closing connection");
socket.close();
bufferedreader.close();
inputstreamreader.close();
printwriter.close();
}
catch (UnknownHostException unhe)
{
System.out.println("UnknownHostException: " + unhe.getMessage());
}
catch (InterruptedIOException intioe)
{
System.out
.println("Timeout while attempting to establish socket connection.");
}
catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
}
public void nullify() {
try
{
socket.close();
serversocket.close();
}
catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
}
}
和客户端...提前
//CLIENT
import java.io.*;
import java.net.*;
import java.util.*;
public class GpsClient {
public String lastMessage;
Socket socket = null;
String serverurl;
int serverport;
public GpsClient() {
lastMessage = "";
serverport = 8189;
serverurl = "192.168.10.4";
try
{
socket = new Socket(serverurl, serverport);
socket.setSoTimeout(10000);
}
catch (UnknownHostException unhe)
{
System.out.println("UnknownHostException: " + unhe.getMessage());
}
catch (InterruptedIOException intioe)
{
System.out.println("Timeout while attempting to establish socket connection.");
}
catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
}
public void retrieveNew() {
try {
socket = new Socket(serverurl, serverport);
socket.setSoTimeout(10000);
lastMessage = "connected!";
InputStreamReader inputstreamreader = new InputStreamReader(socket.getInputStream());
BufferedReader bufferedreader = new BufferedReader(inputstreamreader);
PrintWriter printwriter = new PrintWriter(socket.getOutputStream(),true);
printwriter.println("Request");
lastMessage = "Request sent";
// Get error when I uncomment this block, i.e. try to read the response from the server
// "Timeout while attempting to establish socket connection."
// String lineread = "";
// while ((lineread = bufferedreader.readLine()) != null) {
// System.out.println("Received from Server: " + lineread);
// lastMessage = "Received from Server: " + lineread;
// }
lastMessage = "closing connection!";
bufferedreader.close();
inputstreamreader.close();
printwriter.close();
socket.close();
}
catch (UnknownHostException unhe)
{
System.out.println("UnknownHostException: " + unhe.getMessage());
}
catch (InterruptedIOException intioe)
{
System.out.println("Timeout while attempting to establish socket connection.");
}
catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
finally
{
try
{
socket.close();
}
catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
}
}
public void nullify() {
try
{
PrintWriter printwriter = new PrintWriter(socket.getOutputStream(),true);
printwriter.println("Bye");
printwriter.close();
socket.close();
}
catch (IOException ioe)
{
System.out.println("IOException: " + ioe.getMessage());
}
}
}
谢谢！
乔希
您的信息都是错误的。所有消息“尝试建立套接字连接时超时”都不正确。第一个甚至不可能发生;第二个是接受或从连接读取的超时;第三个是读取超时。一般来说，你不应该用你自己编写的文本来替代异常消息。事实上，你应该捕获'SocketTimeoutException，''不是'InterruptedIOException.'还要在完成任何读取之前打印'套接字读取成功'。尝试清理所有这些并重新测试。目前你的程序只是对你说谎。 – EJP