Android，Android 4.0中的HttpPost方法有问题吗

几年前，我开发了一个应用程序。在每个活动中，我都使用HttpPost方法向服务器发送一些参数。它在所有低于Android v4.0的设备上都能很好地使用3G服务。我的代码是这样的：

private String postData() {
    HttpClient httpClient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(PropertyManager.getLoginURL());
    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4);
    nameValuePairs.add(new BasicNameValuePair("u", Uri.encode(PropertyManager.getUserId())));
    nameValuePairs.add(new BasicNameValuePair("p", Encryption.encrypt(PropertyManager.getPassword())));
    nameValuePairs.add(new BasicNameValuePair("v", PropertyManager.VER));
    nameValuePairs.add(new BasicNameValuePair("t", "0"));
    try {
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        Log.i("Requestd Connection", httppost.getURI().toString());

        HttpResponse response = httpClient.execute(httppost);
        String responseBody = EntityUtils.toString(response.getEntity());
        Log.i("Server Response: ", responseBody);
        if (response.containsHeader("Set-Cookie")) {
            String sessionId = extractSessionId(response.getHeaders("Set-Cookie")[0].getValue());
            PropertyManager.setSessionID(sessionId);
            Log.i("Session Id:", sessionId);
        }

    String str = responseBody.substring(0, 9);
    if(str.equalsIgnoreCase("<!DOCTYPE")) {
        Log.i("postData()", "HTML found instead of XML. Try to extract info...");
        str = responseBody.substring(responseBody.indexOf("<tr>")+4, responseBody.lastIndexOf("</tr>"));
        str = str.toUpperCase();
        Log.i("Extracted info", str);
        return str;
    } else              
        return responseBody;
    } catch(UnsupportedEncodingException usee) {
        usee.printStackTrace();
    } catch(ClientProtocolException cpe) {
        cpe.printStackTrace();
    } catch(IOException ioe) {
        ioe.printStackTrace();
    }
    return null;
}

logcat中的预期结果（我可以在v4.0以下的Android操作系统上获得）：

07-09 12:38:49.593: I/JupiterMPro(4273):                onCreate executes ...
07-09 12:38:49.601: I/MSBootUp(4273):                   inside onCreate();
07-09 12:38:49.694: I/MA_isOnline(4273):                Checking Internet Connection...
07-09 12:38:49.698: I/MA_isOnline(4273):                Internet Connection found.
07-09 12:38:49.730: I/JupiterMPro(4273):                onDestroy executes ...
07-09 12:39:40.675: I/MA_isOnline(4273):                Checking Internet Connection...
07-09 12:39:40.679: I/MA_isOnline(4273):                Internet Connection found.
07-09 12:39:40.820: I/Requestd Connection(4273):        http://demo.excelforce.com.my/mobiletraderjssb/dopwd.aspx?
07-09 12:39:44.609: I/Server Response:(4273):           <TD ID="LGFLAG">S</TD><TD ID="LGMSG"></TD><TD ID="CLNT_0">CLNTXXX,EF TEST,C,001,</TD>
07-09 12:39:44.613: I/Session Id:(4273):                ASPNETSESSIONID=zkuus2n304jnkubi4e1nqnuw
07-09 12:39:44.714: I/JupiterMPro(4273):                onCreate executes ...
07-09 12:39:45.140: I/MSMarket(4273):                   Creating activity...
07-09 12:39:45.202: I/JupiterMPro(4273):                onStart executes ...
07-09 12:39:45.202: I/JupiterMPro(4273):                onResume executes ...
07-09 12:39:45.241: I/MSMarket, Requested URL:(4273):   http://demo.excelforce.com.my/mobiletraderjssb/mtjvg.aspx?marketsummary&msg=1&brd=0
07-09 12:39:45.601: I/MSLogin(4273):                    onStop executes ...
07-09 12:39:46.702: I/MSMarket, Response code:(4273):   200
07-09 12:39:46.718: I/MSMarket, Server Response:(4273): 50,9/7/2012*12:39 PM#1619.61&-0.94&0&448.392m&399.033m&264&331&293&682&1&V
07-09 12:39:46.855: I/Timer(4273):                      Timer executes...
07-09 12:39:46.855: I/Timer(4273):                      seconds elapsed: 1
07-09 12:39:47.757: I/Timer(4273):                      Timer executes...
07-09 12:39:47.761: I/Timer(4273):                      seconds elapsed: 2
07-09 12:39:48.757: I/Timer(4273):                      Timer executes...
07-09 12:39:48.761: I/Timer(4273):                      seconds elapsed: 3

然而，就在我通过3G服务和Android 4.0.3和4.0.4版本连接到互联网时，我在logcat中的输出是这样的：

07-09 14:19:15.395: I/JupiterMPro(4750): onCreate executes ...
07-09 14:19:15.410: I/MSBootUp(4750): inside onCreate();
07-09 14:19:15.465: I/MA_isOnline(4750): Checking Internet Connection...
07-09 14:19:15.465: I/MA_isOnline(4750): Internet Connection found.
07-09 14:19:15.560: I/JupiterMPro(4750): onDestroy executes ...
07-09 14:19:43.765: I/MA_isOnline(4750): Checking Internet Connection...
07-09 14:19:43.765: I/MA_isOnline(4750): Internet Connection found.
07-09 14:19:44.015: I/Requestd Connection(4750): http://demo.excelforce.com.my/mobiletraderjssb/dopwd.aspx?
07-09 14:20:09.350: I/Server Response:(4750): <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
07-09 14:20:09.350: I/Server Response:(4750):     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
07-09 14:20:09.350: I/Server Response:(4750): <html xmlns="http://www.w3.org/1999/xhtml">
07-09 14:20:09.350: I/Server Response:(4750): <head>
07-09 14:20:09.350: I/Server Response:(4750): <title></title>
07-09 14:20:09.350: I/Server Response:(4750): </head>
07-09 14:20:09.350: I/Server Response:(4750): <body>
07-09 14:20:09.350: I/Server Response:(4750): <table>
07-09 14:20:09.350: I/Server Response:(4750): <tr>
07-09 14:20:09.350: I/Server Response:(4750): <td id="LGFLAG">S</td>
07-09 14:20:09.350: I/Server Response:(4750): <td id="LGMSG"></td>
07-09 14:20:09.350: I/Server Response:(4750): <td id="CLNT_0">CLNTXXX,EF TEST,C,001,</td>
07-09 14:20:09.350: I/Server Response:(4750): </tr>
07-09 14:20:09.350: I/Server Response:(4750): </table>
07-09 14:20:09.350: I/Server Response:(4750): </body>
07-09 14:20:09.350: I/Server Response:(4750): </html>
07-09 14:20:09.350: I/postData()(4750): HTML found instead of XML. Try to extract info...
07-09 14:20:09.365: I/Extracted info(4750): <TD ID="LGFLAG">S</TD>
07-09 14:20:09.365: I/Extracted info(4750): <TD ID="LGMSG"></TD>
07-09 14:20:09.365: I/Extracted info(4750): <TD ID="CLNT_0">CLNTXXX,EF TEST,C,001,</TD>
07-09 14:20:09.460: I/JupiterMPro(4750): onCreate executes ...
07-09 14:20:09.510: I/webclipboard(4750): clipservice: android.sec.clipboard.ClipboardExManager@41994c30
07-09 14:20:09.615: I/MSMarket(4750): Creating activity...
07-09 14:20:09.685: I/JupiterMPro(4750): onStart executes ...
07-09 14:20:09.685: I/JupiterMPro(4750): onResume executes ...
07-09 14:20:09.755: I/MSMarket, Requested URL:(4750): http://demo.excelforce.com.my/mobiletraderjssb/mtjvg.aspx?marketsummary&msg=1&brd=0
07-09 14:20:10.030: I/MSLogin(4750): onStop executes ...
07-09 14:20:11.350: I/MSMarket, Response code:(4750): 200
07-09 14:20:11.365: I/MSMarket, Server Response:(4750): 50,9/7/2012*2:20 PM#1619.61&-0.94&0&448.392m&399.033m&264&331&293&682&1&P

事实上，我不知道这个HTML代码是从哪里来的！因为为了连接3G，移动运营商会自动为手机设置代理。我们怀疑代理设置。有人说，在Java中，代理设置会影响接收到的数据吗？提到代理服务器可能会注入这些代码并包装我想要的数据。我认为这个想法是不正确的，因为在相同的情况下，当我使用一个sim卡（3G）为两个Android V2.0。V3.0和v4.0，虽然它们的代理设置都相同，但我在v4.0中收到了错误的数据。我想安卓v4.0的HttpPost库有问题！

这里发生了什么？此代码适用于4.0版以下的Android，而不适用于4.0及以上的Android！

你有这样的经历吗？你做了什么？如有任何建议，我们将不胜感激。感谢

您是否考虑过该问题是否与在主线程上运行网络操作有关？您不能在蜂窝（3.0）和转发的主线程上执行网络操作。

您必须使用AsycTask

http://developer.android.com/reference/android/os/AsyncTask.html

或者一个新的线程来管理http连接。不能使用主踏板进行呼叫。

AsyctTask和Thread基本相同，但AsycTask实现了4个基本方法。

onPreExecute（）、onPostExecute、onProgressUpdate和doInBackground。

试试它们，告诉我们它是否有效。

相关内容

最新更新

热门标签：