我是android開(kāi)發(fā)的新手。我正在開(kāi)發(fā)一個(gè)android應(yīng)用程序，其中我向Web服務(wù)器發(fā)送請(qǐng)求并解析json對(duì)象。我經(jīng)常java.net.SocketTimeoutException: Connection timed out在與服務(wù)器通信時(shí)遇到異常。有時(shí)它會(huì)完美地工作而不會(huì)出現(xiàn)任何問(wèn)題。我知道這個(gè)問(wèn)題已經(jīng)問(wèn)過(guò)很多次了。但是我仍然沒(méi)有得到令人滿意的解決方案。我在下面發(fā)布了我的logcat和應(yīng)用程序服務(wù)器通信代碼。public JSONObject RequestWithHttpUrlConn(String _url, String param){    HttpURLConnection con = null;    URL url;    String response = "";    Scanner inStream = null;    PrintWriter out = null;    try {        url = new URL(_url);        con = (HttpURLConnection) url.openConnection();        con.setDoOutput(true);        con.setRequestMethod("POST");        if(param != null){            con.setFixedLengthStreamingMode(param.getBytes().length);        }        con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");        out = new PrintWriter(con.getOutputStream());        if(param != null){            out.print(param);        }        out.flush();        out.close();        inStream = new Scanner(con.getInputStream());        while(inStream.hasNextLine()){            response+=(inStream.nextLine());        }    } catch (MalformedURLException e) {        // TODO Auto-generated catch block        e.printStackTrace();    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    } finally{        if(con != null){            con.disconnect();        }if(inStream != null){            inStream.close();        }if(out != null){            out.flush();            out.close();        }    }}誰(shuí)能幫我找出解決方案？提前致謝....