JSON Object get problem

Question

Hy!

I have a Json Object:

                            HttpResponse responsePOST = client.execute(post);  
                            HttpEntity resEntity = responsePOST.getEntity();
                            final JSONObject jObject = new JSONObject(EntityUtils.toString(resEntity));
                            Log.e("test", jObject.toString());

Log:

{"responseData":null,"responseStatus":200,"responseDetails":null}

Code:

Log.e("test", String.valueOf(jObject.getInt("responseStatus")))`;

Log:

Get Int from Json:

                                    if (jObject.getInt("responseStatus")== 200)
                                {
                                    Toast toast ;
                                    toast =     Toast.makeText(getApplicationContext(), "OK", 500);
                                toast.show();
                                    finish();
                                }
 else
                                {
                                    Log.e("else", "else");
                                    //dismissDialog(DIALOG_LOADING);
                                     if (jObject.getInt("responseStatus")== 500)
                                     {
                                         throw new Exception("Server Error");
                                     }
                                     else if (jObject.getInt("responseStatus")== 400)
                                     {
                                         throw new Exception("Wrong User/Password");
                                     }
                                     else
                                     {
                                         throw new Exception();
                                     }
                                }
                              //pd.dismiss(); 


                        } catch (Exception e) {
                            Log.e("catch", "catch");
                             Toast toast ;
                                toast =     Toast.makeText(getApplicationContext(), e.getMessage(), 500);
                            toast.show();

                        }

Log:

 catch
 Value null at responseData of type org.json.JSONObject$1 cannot be converted to JSONObject

The log says that the responeStatus is 200, but the toast and the finish was not executed

Please help

full code:

package com.android.skiptvad;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;


public class Registerusr extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.regusr);
        Button bt = (Button)findViewById(R.id.reguserreq);
        final EditText user = (EditText)findViewById(R.id.reguseruser);
        final EditText pw = (EditText)findViewById(R.id.reguserpw);
        final EditText email  = (EditText)findViewById(R.id.requseremail);
        bt.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (user.getText() != null && pw.getText()!= null && email.getText()!= null)
                {
                    download(user.getText().toString(), md5(pw.getText().toString()), email.getText().toString());
                }

            }
        });
    }
    public void download (final String usr, final String pw, final String email)
    {

            try{
                            HttpClient client = new DefaultHttpClient();  
                            String postURL = "http://surfkid.redio.de/register";
                            HttpPost post = new HttpPost(postURL); 
                                List<NameValuePair> params = new ArrayList<NameValuePair>();
                                params.add(new BasicNameValuePair("username", usr));
                                params.add(new BasicNameValuePair("password", pw));
                              params.add(new BasicNameValuePair("email", email));
                            params.add(new BasicNameValuePair("country_id", "1"));
                                UrlEncodedFormEntity ent = new UrlEncodedFormEntity(params,HTTP.UTF_8);
                                post.setEntity(ent);

                                HttpResponse responsePOST = client.execute(post);  
                                HttpEntity resEntity = responsePOST.getEntity();
                                final JSONObject jObject = new JSONObject(EntityUtils.toString(resEntity));
                                Log.e("test", jObject.toString());
                                Log.e("test", String.valueOf(jObject.getInt("responseStatus")));

                                //JSONObject menuObject = jObject.getJSONObject("responseData");

                                if (jObject.getInt("responseStatus")== 200)
                                {

                                    finish();
                                }


                                else
                                {
                                    Log.e("else", "else");
                                    //dismissDialog(DIALOG_LOADING);
                                     if (jObject.getInt("responseStatus")== 500)
                                     {
                                         throw new Exception("Server Error");
                                     }
                                     else if (jObject.getInt("responseStatus")== 400)
                                     {
                                         throw new Exception("Wrong User/Password");
                                     }
                                     else
                                     {
                                         throw new Exception();
                                     }
                                }
                              //pd.dismiss(); 


                        } catch (Exception e) {
                            Log.e("catch", "catch");
                             Toast toast ;
                                toast =     Toast.makeText(getApplicationContext(), e.getMessage(), 500);
                            toast.show();
                            Log.e("catch", e.getMessage());

                        }




    }
    private String md5(String in) {

        MessageDigest digest;

        try {

            digest = MessageDigest.getInstance("MD5");

            digest.reset();        

            digest.update(in.getBytes());

            byte[] a = digest.digest();

            int len = a.length;

            StringBuilder sb = new StringBuilder(len << 1);

            for (int i = 0; i < len; i++) {

                sb.append(Character.forDigit((a[i] & 0xf0) >> 4, 16));

                sb.append(Character.forDigit(a[i] & 0x0f, 16));

            }

            return sb.toString();

        } catch (NoSuchAlgorithmException e) { e.printStackTrace(); }

        return null;

    }
}

By putting the network calls in the main UI thread you risk getting Application Not Responding (ANR) errors and Android killing your app. You'll want to do all network communication in a thread, look into AsyncTask or Handler — Cody Caughlan
– Cody Caughlan, Commented Jan 8, 2011 at 22:55

Mdlc · Accepted Answer · 2016-07-02 15:18:46Z

12

In your code you had commented //JSONObject menuObject = jObject.getJSONObject("responseData");

after this did you get the catch log that you have mentioned " Value null at responseData of type org.json.JSONObject$1 cannot be converted to JSONObject "

because, doing a getJsonObject over a null value is not possible.

you would have to do it this way.

Object menuObject = jObject.get("responseData");

if(menuObject == JSONObject.NULL)
{
 // Skip processing the response Data
}

edited Jul 2, 2016 at 15:18

Mdlc

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answered May 20, 2011 at 1:04

Sethu

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1 Comment

YuDroid Over a year ago

What if I would like to parse the rest of the data instead of skipping the remaining part, which contains valuable information for me?

VMcPherron · Accepted Answer · 2015-06-18 19:26:32Z

1

I realize I'm a little late to the party but Sethu is correct. I knew I needed to test for null, but the following wouldn't work:

if(Object.get("responseData") != null)

But the following works fine:

if(Object.get("responseData") != JSONObject.NULL)

answered Jun 18, 2015 at 19:26

VMcPherron

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Comments

dave.c · Accepted Answer · 2011-01-08 19:22:28Z

0

This line is incorrect:

toast =     Toast.makeText(getApplicationContext(), "OK", 500);

According to the docs the int duration is:

duration How long to display the message. Either LENGTH_SHORT or LENGTH_LONG

Try changing the line to:

toast =     Toast.makeText(getApplicationContext(), "OK", Toast.LENGTH_SHORT);

answered Jan 8, 2011 at 19:22

dave.c

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7 Comments

user547995 Over a year ago

if i delete the toast the finish also won't be executed

dave.c Over a year ago

If you fix the toast (or replace it with a Log output) does the code block execute? The problem is either that the code block isn't getting executed, or that the finish() isn't doing as you expect.

user547995 Over a year ago

the problem is the last log post the code access the catch block because the parsing error

dave.c Over a year ago

Post the line of code that displays the single "200" entry in the log. Can't you store that result and test it rather than calling getInt in your if statement?

dave.c Over a year ago

So is the behaviour that even when the log prints "200" it then continues into the else statement and executes that code block? Or is it that it matches the 200 and executes the block with finish() but doesn't actually end your app? A concise description of the problem would help.

|

Cody Caughlan · Accepted Answer · 2011-01-08 19:05:37Z

-2

Try removing the Toast and the finish and just logging access into that IF statement - it might be a situation where Android doesnt display the Toast because its already in the process of finishing the Activity (although this seems unlikely since Android in other times seems happy to display Toasts for Activities that have already left the foreground)

answered Jan 8, 2011 at 19:05

Cody Caughlan

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