Android网络编程：IOExceptions和StackOverflowError

在我的Android应用程序中，我尝试连接到本地服务器上的端口以获取一些数据包。我一直包裹到代码中的一些尝试&赶上的，但下面的代码：Android网络编程：IOExceptions和StackOverflowError

address = "192.168.175.82"; 
public void run() { 
    try { 
    smtpSocket = new Socket(address, 60001); 

     os = new DataOutputStream(smtpSocket.getOutputStream()); 
     is = new DataInputStream(smtpSocket.getInputStream()); 
    } catch (UnknownHostException e) { 
     System.err.println("Don't know about host: " + address); 
     run(); 
    } catch (IOException e) { 
     System.err.println("Couldn't get I/O for the connection to: " + address); 
     run(); 
    } catch (Exception e) { 
    System.out.println("retry"); 
    run(); 
    }

如存在服务器不在，我明明得到了IOException异常几次（如几百次）之前，我收到了堆栈溢出错误和应用程序崩溃。

01-20 22:21:32.526: ERROR/AndroidRuntime(5678): java.lang.StackOverflowError 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.util.Hashtable.get(Hashtable.java:282) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.util.Properties.getProperty(Properties.java:177) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.lang.System.getProperty(System.java:440) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.lang.System.getProperty(System.java:412) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.lang.Boolean.getBoolean(Boolean.java:174) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at org.apache.harmony.luni.net.NetUtil$Action.run(NetUtil.java:89) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at org.apache.harmony.luni.net.NetUtil$Action.run(NetUtil.java:80) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.security.AccessController.doPrivilegedImpl(AccessController.java:264) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.security.AccessController.doPrivileged(AccessController.java:84) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at org.apache.harmony.luni.net.NetUtil.preferIPv6Addresses(NetUtil.java:51) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at org.apache.harmony.luni.net.PlainSocketImpl.bind(PlainSocketImpl.java:190) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.net.Socket.startupSocket(Socket.java:777) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.net.Socket.tryAllAddresses(Socket.java:192) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.net.Socket.<init>(Socket.java:256) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at java.net.Socket.<init>(Socket.java:220) 
01-20 22:21:32.526: ERROR/AndroidRuntime(5678):  at com.example.sockets.ReadSocket.run(ReadSocket.java:83)

任何人都可以请指出我正确的方向如何让这个工作？也许我应该先以某种方式测试连接（如果有的话，请说怎么样？）感谢

克里斯

来源

2010-08-09 Chris Robinson

对于初学者，请放弃递归调用。这将摆脱堆栈溢出。用循环代替它，并在每次不成功的迭代中睡眠

public void run() { 
    boolean connected = false; 
    while(!connected) 
    { 
    try { 
     smtpSocket = new Socket(address, 60001); 

      os = new DataOutputStream(smtpSocket.getOutputStream()); 
      is = new DataInputStream(smtpSocket.getInputStream()); 


     connected = true; 
    } catch (UnknownHostException e) { 
     System.err.println("Don't know about host: " + address); 

    } catch (IOException e) { 
     System.err.println("Couldn't get I/O for the connection to: " + address); 

     } catch (Exception e) { 
     System.out.println("retry"); 

     } 
     if (!connected) 
      Thread.sleep(1000) 
     } 
    }

来源

2010-08-09 11:50:19 hrstrand

非常感谢。刚发布时就明白了这一点！请原谅我的白痴= P。 – 2010-08-09 11:57:31

你可以尝试isConnected()和isBound()您的插座上请检查是否已连接或不试图获得一个前的InputStream。

来源

2010-08-09 11:38:39 Sephy

感谢您的回复！但是，这样做仍会导致溢出错误。我甚至尝试完全删除I/O流，但错误仍然存在。 – 2010-08-09 11:47:55

2方法返回true ??? ，因为如果他们不这样做，你可以改变你的处理方式，或者在重复尝试连接之前设置一个延迟时间？ – Sephy 2010-08-09 12:11:16

Android网络编程：IOExceptions和StackOverflowError

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