Android：連接拒絕錯誤

Question

連接到我的服務器時，出現「連接被拒絕」錯誤。 在瀏覽器中打開網址可以正常工作。我的應用程序具有互聯網許可。 這裏的堆棧跟蹤：

08-03 16:17:05.549 28233-28267/appname.myname.com.appname W/System: ClassLoader referenced unknown path: /data/data/appname.myname.com.appname/lib 
08-03 16:17:07.336 28233-28321/appname.myname.com.appname W/System.err: java.net.ConnectException: Connection refused 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.net.PlainSocketImpl.socketConnect(Native Method) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:334) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:196) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:356) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.net.Socket.connect(Socket.java:586) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.internal.Platform.connectSocket(Platform.java:113) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.Connection.connectSocket(Connection.java:196) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.Connection.connect(Connection.java:172) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:367) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:130) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:329) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:246) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:457) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:405) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:243) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at appname.myname.com.appname.Search$Async$override.doInBackground(Search.java:63) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at appname.myname.com.appname.Search$Async$override.access$dispatch(Search.java) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at appname.myname.com.appname.Search$Async.doInBackground(Search.java:0) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at appname.myname.com.appname.Search$Async.doInBackground(Search.java:50) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at android.os.AsyncTask$2.call(AsyncTask.java:304) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 
08-03 16:17:07.338 28233-28321/appname.myname.com.appname W/System.err:  at java.lang.Thread.run(Thread.java:761) 

這裏是我的類：

public static class Async extends AsyncTask<String, Integer, String> { 

    @Override 
    protected String doInBackground(String... params) { 
     URL url = null; 
     try { 
      url = new URL("http://localhost:80/mysql/php.php"); 
     }catch (MalformedURLException ex){ 
      ex.printStackTrace(); 
     } 
     try { 
      URLConnection conn = url.openConnection(); 
      conn.setDoOutput(true); 
      BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
      StringBuilder sb = new StringBuilder(); 
      String line; 
      while ((line = reader.readLine()) != null) { 
       sb.append(line); 
      } 
      Log.d("dd", "e" + line); 
     }catch(IOException ex){ 
      ex.printStackTrace(); 
     } 

     return ""; 
    } 


} 

是應用程序有問題，還是我的服務器？

Answer 1

修正了它。問題是我在我的電腦上使用了防火牆...

Answer 2

我想我有這個確切的問題。但是，我正在通過一個HttpClient，它似乎與您的代碼不同。我這樣做是爲了解決我的問題，它可能會給你提示做什麼：

public static void maybeCreateHttpClient() { 
    if (mHttpClient == null) { 
     mHttpClient = new DefaultHttpClient(); 
     final HttpParams params = mHttpClient.getParams(); 
     HttpConnectionParams.setConnectionTimeout(params, 
       REGISTRATION_TIMEOUT); 
     HttpConnectionParams.setSoTimeout(params, REGISTRATION_TIMEOUT); 
     ConnManagerParams.setTimeout(params, REGISTRATION_TIMEOUT); 
     HttpProtocolParams.setUserAgent(params, USER_AGENT); 
     HttpProtocolParams.setContentCharset(params, "UTF-8"); 

     // And the line that I addded to help me out: 
     HttpProtocolParams.setUseExpectContinue(params, false); 
    } 
}