Question

让我来描述我的申请，我从网站JSON url（Drupal网站）获取数据，数据是JSON格式。在我的应用程序登录功能完美。＆安培;用户在服务器上验证。我也从服务器＆amp;获取其他数据（JSON url）。在我的Android应用程序中显示 现在，问题是我无法访问需要登录的页面的JSON数据，因为我的登录不是在整个Android应用程序中维护。

我搜索了stackoverflow＆amp;谷歌我得到了这些链接＆amp;尝试但不知道如何在我的代码中使用它们： http://hc.apache.org/httpcomponents-client-ga/tutorial/html/statemgmt.html

Android session management

Http cookie store in Android

以下是来自drupal网站的空JSON，无需登录。

{
    "nodes": []
}

以下是来自drupal网站的JSON-登录后的（http://www.mywebsite.com/user/login）＆amp;在计算机webbrowser 中重新加载网站上的http://www.mywebsite.com/myaccount-page页面。表示计算机网络浏览器自动维护登录会话。

{
"nodes": [
    {
        "node": {
            "Uid": "51",
            "Username": "anand",
            "Name": "anand",
            "Address": "\n\tAt- vadodara Nr. Kareli Baugh",
            "Date of Birth": "1998-08-20",
            "Occupation": "student",
            "Member Since": "36 weeks 6 days"
        }
    }
 ]
}

但在Android应用程序中，它不会自动执行此操作。 所以我想在Android中维护这个会话，这样我就可以登录到android应用程序，登录后重定向到另一个页面活动＆amp;在那里获取JSON数据。 这是我的代码：

LoginActivity.java

     public void onClick(View v) {


            String uName = editUser.getText().toString();
            String Password = editPass.getText().toString();

            if(uName.equals("") | Password.equals(""))
            {
                Toast.makeText(getApplicationContext(), "Enter the Username and Password",Toast.LENGTH_SHORT).show();
            }
            else{


                                     String strResponse = util.makeWebCall(loginURL,uName,Password);
                 System.out.println("=========> Response from login page=> " + strResponse);


                try{
                    if (strResponse.substring(KEY_SUCCESS) != null) {
                        txterror.setText("");



                         Intent inlogin = new Intent(LoginActivity.this,
                                post_myprofile.class);
                        inlogin.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        startActivity(inlogin);

                        //finish();
                    }
                    else
                    {
                        txterror.setText("Username and Password Not valid !!!");
                    }
                }
                catch (Exception e) {
                    // TODO: handle exception
                }





            }


        }
    });

    btngotoregister.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            Intent intent1 = new Intent(getApplicationContext(),
                    RegisterActivity.class);
            // intent.setFlags (Intent.FLAG_ACTIVITY_CLEAR_TOP);
            startActivity(intent1);

        }
    });
 }
 }

util.java中的makeWebCall方法

util.java

 public static String makeWebCall(String url, String uname,String pass)
{
    DefaultHttpClient client = new DefaultHttpClient();

    HttpPost post = new HttpPost(url);

     List<NameValuePair> params = new ArrayList<NameValuePair>();

     params.add(new BasicNameValuePair("username",uname));
        params.add(new BasicNameValuePair("password",pass));

    UrlEncodedFormEntity formEntity = null;
    try {
        formEntity = new UrlEncodedFormEntity(params);
    } catch (UnsupportedEncodingException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    }

    post.setEntity(formEntity);

    try {
        //post.setEntity(new StringEntity(requestString));

        HttpResponse response = client.execute(post);
        System.out.println("=========> Responsehello => "+response);
        int statusCode = response.getStatusLine().getStatusCode();

        if (statusCode == HttpStatus.SC_OK)
        {
            HttpEntity entity = response.getEntity();
            InputStream is = entity.getContent();
            return iStream_to_String(is);
        }
        else
        {
            return "Hello This is status ==> :"+String.valueOf(statusCode);
        }
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return null;
}

现在使用此代码登录成功＆amp;我从服务器获得了详细的JSON响应。＆安培; page-activity重定向到用户个人资料的第2页。在第二页上，我没有得到userprofile JSON数据 - 如上所述，我得到了空白JSON，因为没有维护会话。

以下是第二页活动的代码。

post_myprofile.java

protected Void doInBackground(Void... params) {
        // TODO Auto-generated method stub

        String url = "http://www.cheerfoolz.com/myaccount-page";
        String strResponse = util.makeWebCall(url);

        try {
            JSONObject objResponse = new JSONObject(strResponse);

            JSONArray jsonnodes = objResponse
                        .getJSONArray(API.cheerfoolz_myprofile.NODES);

util.java中的配置文件的makewebcall方法

util.java

 public static String makeWebCall(String url) {

    DefaultHttpClient client = new DefaultHttpClient();

    HttpGet httpRequest = new HttpGet(url);
  //  HttpPost post = new HttpPost(url);

    try {

        HttpResponse httpResponse = client.execute(httpRequest);

         final int statusCode = httpResponse.getStatusLine().getStatusCode();

         if (statusCode != HttpStatus.SC_OK) {
          /*  Log.i(getClass().getSimpleName(),
                "Error => " + statusCode + " => for URL " + url);*/
            return null;
         }

         HttpEntity entity = httpResponse.getEntity();
            InputStream is = entity.getContent();
            return iStream_to_String(is);
    }
    catch (IOException e) {
        httpRequest.abort();
      // Log.w(getClass().getSimpleName(), "Error for URL =>" + url, e);
    }

    return null;

 }


public static String iStream_to_String(InputStream is1)
{
     BufferedReader rd = new BufferedReader(new InputStreamReader(is1), 4096);
     String line;
     StringBuilder sb =  new StringBuilder();
     try {
        while ((line = rd.readLine()) != null) {
                sb.append(line);
         }
         rd.close();

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
     String contentOfMyInputStream = sb.toString();
     return contentOfMyInputStream;
}


}

我在这个页面中得到了空白的JSON - 我在上面已经提到了。那么如何在此用户个人资料活动中维护会话＆amp;获取数据？

感谢收听。

Answer 1

终于为我工作了:)

而不是一直使用新的 DefaultHttpClient ，我已将其设为静态＆amp;只用过一次。

static DefaultHttpClient client = new DefaultHttpClient();

Answer 2

package com.velmurugan.vazbo_new.utility;
import android.webkit.CookieManager;
import android.webkit.CookieSyncManager;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.cookie.Cookie;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HttpContext;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/**
 * Created by velsans@gmail.com on 11/1/2015.
 */
public class SessionParser {
    public SessionParser(){
    }
    public static String makeWebCall(String url,List<NameValuePair> params  )
    {
        CommonClass.httpClient = new DefaultHttpClient();
        HttpPost post = new HttpPost(url);
        UrlEncodedFormEntity formEntity = null;
        try {
            formEntity = new UrlEncodedFormEntity(params);
        } catch (UnsupportedEncodingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        post.setEntity(formEntity);
        try {
            HttpResponse response = CommonClass.httpClient.execute(post);
            System.out.println("=========> Responsehello => "+response);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK)
            {
                HttpEntity entity = response.getEntity();
                InputStream is = entity.getContent();
                return iStream_to_String(is);
            }
            else
            {
                return "Hello This is status ==> :"+String.valueOf(statusCode);
            }
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
    public static String makeWebCall(String url) {
        System.out.println("=========> Response url => "+url);
        HttpGet httpRequest = new HttpGet(url);
        try {
            HttpResponse httpResponse = CommonClass.httpClient.execute(httpRequest);
            final int statusCode = httpResponse.getStatusLine().getStatusCode();
            if (statusCode != HttpStatus.SC_OK) {
          /*  Log.i(getClass().getSimpleName(),
                "Error => " + statusCode + " => for URL " + url);*/
                return null;
            }
            HttpEntity entity = httpResponse.getEntity();
            InputStream is = entity.getContent();
            return iStream_to_String(is);
        }
        catch (IOException e) {
            httpRequest.abort();
            // Log.w(getClass().getSimpleName(), "Error for URL =>" + url, e);
        }
        return null;
    }
    public static String iStream_to_String(InputStream is1)
    {
        BufferedReader rd = new BufferedReader(new InputStreamReader(is1), 4096);
        String line;
        StringBuilder sb =  new StringBuilder();
        try {
            while ((line = rd.readLine()) != null) {
                sb.append(line);
            }
            rd.close();

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        String contentOfMyInputStream = sb.toString();
        return contentOfMyInputStream;
    }
}

如何在整个Android原生应用程序中维护服务器登录？

2 个答案: