从Android向HTTP服务器连续发送HTTP请求

Question

我想从我的Android应用程序发送两个连续的HTTP请求到HTTP服务器，第一个请求是登录，第二个请求是在成功登录时检索XML数据。我尝试了下面的代码。

 public class XMLParser {
  public String getXmlFromUrl(String url) {
    String xml = null;
    // defaultHttpClient
    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost1 = new HttpPost(url);   //post for login
    HttpPost httpPost2 = new HttpPost(url);   //post for xml data
   // Building post parameters, key and value pair
    List<NameValuePair> nameValuePair1 = new ArrayList<NameValuePair>(3);
    nameValuePair1.add(new BasicNameValuePair("action", "login"));
    nameValuePair1.add(new BasicNameValuePair("username", "admin"));
    nameValuePair1.add(new BasicNameValuePair("secret", "admin"));
    // Building post parameters, key and value pair
    List<NameValuePair> nameValuePair2 = new ArrayList<NameValuePair>(1);
    nameValuePair2.add(new BasicNameValuePair("action", "sippeers"));
    try {
        httpPost1.setEntity(new UrlEncodedFormEntity(nameValuePair1));
        httpPost2.setEntity(new UrlEncodedFormEntity(nameValuePair2));
        } 
    catch (UnsupportedEncodingException e) {
        // writing error to Log
        e.printStackTrace();
        }
    try {
                //executing first http post
        HttpResponse httpResponse1 = httpClient.execute(httpPost1);
                //executing second http post
        HttpResponse httpResponse2 = httpClient.execute(httpPost2);
        HttpEntity httpEntity2 = httpResponse2.getEntity();
        xml = EntityUtils.toString(httpEntity2);
    } catch (ClientProtocolException e) {
        // writing exception to log
        e.printStackTrace();
    } catch (IOException e) {
        // writing exception to log
        e.printStackTrace();
    }
    return xml;
}

我想首先执行httpPost1，然后在连续登录时，我想从第二个HttpPost请求检索字符串xml。在执行上述代码时，我得到的错误说权限被拒绝。我认为我必须在发送两个HttpPost请求时保持某种会话，并且应该仅在成功执行第一个请求时发送第二个HttpPost请求。如果有人能指导我解决这个问题，我将不胜感激。

Answer 1

我的意见是，您将登录数据保存在cookie中。