Unable to get JSONObject from a url

Unable to get JSONObject from a url - java

I am developing an android app which requires a "token" to login. This token is available along with some other details at https://demo.vtiger.com/webservice.php?operation=getchallenge&username=admin. I tried to fetch the data by JSON parsing but it is not working properly. Please help me. Thanks. This how I coded:-
//MainActivity.java
package com.example.login1;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity_old extends Activity {
//URL to get JSON Array
private static String url = "http://demo.vtiger.com/webservice.php?operation=getchallenge&username=admin";
//JSON Node Names
private static final String TAG_RESULT = "result";
private static final String TAG_TOKEN = "token";
String token = null;
EditText userid, accesskey;
Button login;
TextView gettoken;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
this.gettoken = (TextView)findViewById(R.id.lblToken);
new AsyncTask<Void, Void, Void>() {
JSONArray result;
#Override
protected Void doInBackground(Void... params) {
// Creating new JSON Parser
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting JSON Array
result = json.getJSONArray(TAG_RESULT);
JSONObject json_result = json.getJSONObject(TAG_RESULT);
// Storing JSON item in a Variable
token = json_result.getString(TAG_TOKEN);
//Importing TextView
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
//Set JSON Data in TextView
gettoken.setText(token);
}
}.execute();
userid = (EditText) findViewById(R.id.txtUserid);
accesskey = (EditText) findViewById(R.id.txtPassword);
Button login = (Button) findViewById(R.id.btnLogin);
login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
/* This code get the values from edittexts */
String useridvalue = userid.getText().toString();
String accesskeyvalue = accesskey.getText().toString();
/*To check values what user enters in Edittexts..just show in logcat */
Log.d("useridvalue",useridvalue);
Log.d("accesskeyvalue",accesskeyvalue);
String md=md5(accesskeyvalue + token);
System.out.println(md);
}
public String md5(String s)
{
MessageDigest digest;
try
{
digest = MessageDigest.getInstance("MD5");
digest.update(s.getBytes(),0,s.length());
String hash = new BigInteger(1, digest.digest()).toString(16);
return hash;
}
catch (NoSuchAlgorithmException e)
{
e.printStackTrace();
}
return "";
}
});
}
}

"result" is JSONObject instead of JSONArray. get token String from result JSONObject as:
JSONObject json_result = json.getJSONObject(TAG_RESULT);
// Storing JSON item in a Variable
token = json_result.getString(TAG_TOKEN);

Just make these two changes.
result = json.getJSONArray(TAG_RESULT);
to
result = json.getJSONObject(TAG_RESULT);
and
JSONArray result;
to
JSONObject result;

Related

JSON Issue - how to fix that?

This is my code for getting the data from JSON, it will contain only one row,
but it will give output for only "pro_name" for left of the values it will give just dots(......).
package com.example.sh_enterprises;
import android.app.ProgressDialog;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.CardView;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class Detailes extends AppCompatActivity {
//this is the JSON Data URL
//make sure you are using the correct ip else it will not work
public static String URL_PRODUCTS, pass1,pass2 ;
public static String ptopic,psubcode;
private static ProgressDialog progressDialog;
//a list to store all the products
List<pro_data> productList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detailes);
Intent i = getIntent();
pass1 = i.getStringExtra("pro_id");
//Toast.makeText(this,"HI THIS IS "+pass,Toast.LENGTH_SHORT).show();
//URL_PRODUCTS = "https://premnathindia.000webhostapp.com/Api.php?p1="+pass;
URL_PRODUCTS = "http://192.168.225.25/prem/Api.php?p1="+pass1+"&p2=det";
Toast.makeText(this, URL_PRODUCTS, Toast.LENGTH_SHORT).show();
productList = new ArrayList<>();
//this method will fetch and parse json
//to display it in recyclerview
loadProducts();
}
private void loadProducts() {
prefConfig product = new prefConfig(this);
String str = product.read_ret_id();
Toast.makeText(this,str,Toast.LENGTH_SHORT).show();
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Please wait...");
progressDialog.show();
/*
* Creating a String Request
* The request type is GET defined by first parameter
* The URL is defined in the second parameter
* Then we have a Response Listener and a Error Listener
* In response listener we will get the JSON response as a String
* */
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL_PRODUCTS,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
//converting the string to json array object
JSONArray array = new JSONArray(response);
//traversing through all the object
for (int i = 0; i < 1; i++) {
//getting product object from json array
JSONObject product = array.getJSONObject(i);
product.getString("pro_id");
String st;
TextView a = findViewById(R.id.pro_name);
TextView b = findViewById(R.id.weight);
TextView c = findViewById(R.id.base_amount);
TextView d = findViewById(R.id.mass_amonut);
TextView e = findViewById(R.id.brand);
TextView f = findViewById(R.id.catogery);
String st1 = product.getString("pro_name");
a.setText(st1);
st = product.getString("weight");
b.setText(st);
st = product.getString("total_amount");
d.setText(st);
//st = product.getString("pro_img_url");
st = product.getString("base_amount");
c.setText(st);
//st = product.getString("disc");
st = product.getString("brands");
e.setText(st);
st = product.getString("categories");
f.setText(st);
}
progressDialog.dismiss();
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
//adding our stringrequest to queue
Volley.newRequestQueue(this).add(stringRequest);
}
public void downme_ooi(View view) {
String pro_id = ((TextView) view).getText().toString();
Intent i = new Intent(this,Detailes.class);
i.putExtra("pro_id",pro_id);
startActivity(i);
}
public void go_back(View view) {
super.onBackPressed();
}
}

Sorry I made the Mistake that in TextView I put the text as password .

JSONObject isn't encoding like it should be?

This is server side code
<?php
require('connection.php');
require('functions.php');
$inputJSON = file_get_contents('php://input');
$aReuestData = json_decode( $inputJSON, TRUE ); //convert JSON into array
$user_email = $aReuestData['user_email'];
$user_password = $aReuestData['user_password'];
$user_uniq = $aReuestData['user_uniq_id'];
if((($user_password !='') && ($user_email !=''))|| ($user_uniq!=''))
{
$uname = $user_email;
$pword = $user_password;
$format ='json';
if(($user_password !='') && ($user_email !='')){
echo $checkUser = checkLogin($uname,$pword);
}
else{
$checkUser = checkLoginFacebook($user_uniq);
}
//print_r($checkUser);
if($checkUser['id'] > 0)
{
$result = $checkUser;
}else{
$result = "false";
}
}else{
$result = "Enter username and password";
}
$records = array("result"=> $result);
echo $_REQUEST['jsoncallback']. json_encode($records);
?>
and my code for login activity is
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.Cache;
import com.android.volley.Network;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.BasicNetwork;
import com.android.volley.toolbox.DiskBasedCache;
import com.android.volley.toolbox.HurlStack;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;
public class Login extends MainActivity {
//private Button button;
//private TextView welcome;
//private EditText username;
//private EditText password;
//private JSONObject jsonObject;
private RequestQueue requestQueue;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Cache cache = new DiskBasedCache(getCacheDir(),1024 * 1024);
Network network = new BasicNetwork(new HurlStack());
requestQueue= new RequestQueue(cache,network);
final TextView send = (TextView)findViewById(R.id.send);
final TextView hello = (TextView)findViewById(R.id.mess);
EditText username = (EditText)findViewById(R.id.edituser);
EditText password = (EditText)findViewById(R.id.editpass);
Button button = (Button)findViewById(R.id.signin);
final JSONObject jsonObject = new JSONObject();
try {
// jsonObject.put("Content-Type: ","application-json");
jsonObject.put("user_email",username.getText().toString().trim());
jsonObject.put("user_password",password.getText().toString().trim());
} catch (JSONException e) {
e.printStackTrace();
}
final HashMap<String,String> params = new HashMap<String, String>();
params.put("user_email",username.getText().toString().trim());
params.put("user_password",password.getText().toString().trim());
String json = "{\"user_email\":\"ankur#gmail.com\",\"user_password\":\"123456\"} ";
JSONObject json1 = new JSONObject();
try {
json1 = new JSONObject(json);
} catch (JSONException e) {
e.printStackTrace();
}
requestQueue.start();
final String url = "http://demo4u.org/leaveapp/ws/login.php";
send.setText(json1.toString());
final JSONObject finalJson = json1;
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(ApiMethods.login, finalJson,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Toast.makeText(Login.this,"Passed",Toast.LENGTH_LONG).show();
hello.setText(response.toString());
Toast.makeText(Login.this,jsonObject.toString(),Toast.LENGTH_LONG).show();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(Login.this,"Error",Toast.LENGTH_LONG).show();
}
}
){
#Override
public Map<String,String> getHeaders(){
HashMap<String,String> headers = new HashMap<>();
headers.put("Accept", "application/json");
headers.put("Content-Type","application/json");
return headers;
}
};
requestQueue.add(jsonObjectRequest);
}
});
}
}
and the only thing that I get returned is
$result = "Enter username and password";
what am I doing wrong?
am I to include JSON header or something ???
Please reply in detailed view cause I'm new to android.....
The input is
{"user_email":"ankur#gmail.com","user_password":"123456"}
and server response would be
Array{"result":{"id":"1","name":"ankur","email":"ankur#gmail.com","address":"b-block","designation":"devloper","department":"development","balanceleave":"5"}}
login php server is : http://demo4u.org/leaveapp/ws/login.php

Try setting the headers by overriding the getHeaders() method in JsonObjectRequest
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(...your arguments here) {
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> headerParameters = new HashMap<>();
headerParameters.put("Accept", "application/json");
headerParameters.put("Content-Type", "application/json");
return headerParameters;
}
};

while parsing data in json getting error java.lang.nullpointerexception & end of input character at 0

this is my service code. please help me to get rid from` this. i call this service on button click . but getting this error every time.thanks in advance. also check the link to webservices don't know is it correct or not
package com.ballerxtreme;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.util.Log;
public class Send_request_id extends AsyncTask<String, String, JSONObject> {
Activity activity;
String request_id;
JSONParser jp = new JSONParser();
public Send_request_id(Activity activity, String request_id) {
this.activity = activity;
this.request_id = request_id;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected JSONObject doInBackground(String... params) {
String url = "http://jstarfitness.com/service/saveuser.php";
// String url = "http://jstarfitness.com/service/index.php";
JSONParser parser = new JSONParser();
List<NameValuePair> param = new ArrayList<NameValuePair>();
param.add(new BasicNameValuePair("requestid", request_id));
String json_send = parser.makeHttpRequest(url, "post", param);
JSONObject jobj = null;
try {
Log.e("Request-Id-Send", json_send);
jobj = new JSONObject(json_send);
} catch (JSONException e) {
Log.e("Request-Id-Send", json_send);
e.printStackTrace();
String io = e.getMessage();
Log.e("error", io);
}
return jobj;
}
#Override
protected void onPostExecute(JSONObject result) {
// TODO Auto-generated method stub
Log.e("Id_Send", request_id);
super.onPostExecute(result);
}
}

I got solution from the above comments by make changes in the jsonparser class. changes in the post method now data is sent to link successfull... thanks

errors in extracting json object

I have to retrieve json object from json file from this url.
My code is throwing java.lang.RuntimeException in doInBackground() and string to jsonObject conversion exception.
Can anyone help me at this? I am new to Android programming.
package course.examples.networkingearthquake;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.os.AsyncTask;
import android.widget.Button;
import android.view.View;
import android.widget.TextView;
import android.widget.EditText;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import android.net.http.AndroidHttpClient;
public class HttpActivity extends ActionBarActivity {
TextView mTextView;
EditText etInput;
TextView input;
String number;//edited
int num;//edited
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_socket);
mTextView = (TextView)findViewById(R.id.text1);
input = (TextView)findViewById(R.id.input);
etInput = (EditText)findViewById(R.id.etInput);
input.setText("Input");
//number = etInput.getText().toS();
final Button btDisplay = (Button)findViewById(R.id.btDisplay);
btDisplay.setText("DISPLAY");
btDisplay.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
new HttpGetTask().execute();
}
});
}
private class HttpGetTask extends AsyncTask<Void, Void, String>{
private static final String TAG = "HttpGetTask";
private static final String URL = "http://earthquake.usgs.gov/earthquakes/feed/geojsonp/2.5/week";
AndroidHttpClient mClient = AndroidHttpClient.newInstance("");
#Override
protected String doInBackground(Void... params){
HttpGet request = new HttpGet(URL);
JSONResponseHandler responseHandler = new JSONResponseHandler();
// ResponseHandler<String> responseHandler = new BasicResponseHandler();
try{
return mClient.execute(request,responseHandler);
}catch(ClientProtocolException exception){
exception.printStackTrace();
}catch(IOException exception){
exception.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result){
if(null != mClient)
mClient.close();
mTextView.setText(result);
}
}
private class JSONResponseHandler implements ResponseHandler<String>{
#Override
public String handleResponse(HttpResponse response)
throws ClientProtocolException, IOException {
String result = null;
String JSONResponse = new BasicResponseHandler().handleResponse(response);
JSONResponse = JSONResponse.substring(17, JSONResponse.length()-3);
num = Integer.parseInt(number);// edited
try {
JSONObject responseObject = (JSONObject) new JSONTokener(
JSONResponse).nextValue();
JSONArray features = responseObject.getJSONArray("features");
JSONObject retObject = (JSONObject)features.get(num);//edited
// JSONObject geometry = (JSONObject)retObject.get("geometry");
result = retObject.toString();
} catch (JSONException e) {
e.printStackTrace();
}
return result;
}
}

The JSON returned by the URL you specify containts eqfeed_callback() which needs to be stripped in order to make it valid JSON.
It seems like you have done this in your response handler, but you are cutting off one character too much at both the start and the end.
Try this:
JSONResponse = JSONResponse.substring(16, JSONResponse.length()-2);

How do I pass parameter to webservice and get json datas in listview

Hi (fresher to andorid)
I'm developing an android application which will use the webservice which should accept 1 parameter from the user and based on that the value is fetched datas from DB(sql server 2008) and bind that to android:LISTVIEW.
Without using the parameter my android application is working fine.But when i altered my webserservice to accept parameter and call it in android it is not displaying the result based on the given value instead of that it displays all values.
Here is my webservice code;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Script.Serialization;
using System.Web.Script.Services;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.ComponentModel;
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class JService : System.Web.Services.WebService
{
public JService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
public void Cargonet(string jobno)
{
try
{
System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["NSConstr"].ToString());
SqlCommand cmd = new SqlCommand();
//cmd.CommandText = "SELECT id,name,salary,country,city FROM EMaster where age = '" + jobno + "'";
cmd.CommandText = "SELECT [Id] as Id,[Status] as status ,[DateTime] as DateTime FROM [Attendance].[dbo].[cargo] WHERE JobNo= '" + jobno + "' ";
DataSet ds = new DataSet();
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.SelectCommand.Connection = con;
da.Fill(dt);
con.Close();
List<Dictionary<string, object>> rows = new List<Dictionary<string, object>>();
Dictionary<string, object> row = null;
foreach (DataRow rs in dt.Rows)
{
row = new Dictionary<string, object>();
foreach (DataColumn col in dt.Columns)
{
row.Add(col.ColumnName, rs[col].ToString().Trim());
}
rows.Add(row);
}
this.Context.Response.ContentType = "application/json; charset=utf-8";
this.Context.Response.Write(serializer.Serialize(new { Cargo = rows }));
}
catch (Exception ex)
{
//return errmsg(ex);
}
}
}
Here is my android code(Main.java):
package com.example.cargotracking;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
ListView list;
TextView Id;
TextView Status;
TextView DateTime;
Button Btngetdata;
String JobNo;
EditText editText1;
ArrayList<HashMap<String, String>> CargoTracklist = new ArrayList<HashMap<String, String>>();
//URL to get JSON Array
private static String url = "http://ip/testing/TrackId.asmx/Cargonet";
//JSON Node Names
private static final String TAG_CargoTrack = "Cargo";
private static final String TAG_Id = "Id";
private static final String TAG_Status = "Status";
private static final String TAG_DateTime = "DateTime";
JSONArray Cargo = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
CargoTracklist = new ArrayList<HashMap<String, String>>();
Btngetdata = (Button)findViewById(R.id.button1);
Btngetdata.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new JSONParse().execute();
}
});
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
Status = (TextView)findViewById(R.id.textView2);
Id= (TextView)findViewById(R.id.textView1);
DateTime = (TextView)findViewById(R.id.textView3);
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
// List params = new ArrayList();
params.add(new BasicNameValuePair("JobNo","01"));
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url,params);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array from URL
Cargo = json.getJSONArray(TAG_CargoTrack);
for(int i = 0; i < Cargo.length(); i++){
JSONObject c = Cargo.getJSONObject(i);
// Storing JSON item in a Variable
String Status = c.getString(TAG_Status);
String Id = c.getString(TAG_Id);
String DateTime = c.getString(TAG_DateTime);
// Adding value HashMap key => value
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_Status, Status);
map.put(TAG_Id, Id);
map.put(TAG_DateTime, DateTime);
CargoTracklist.add(map);
list=(ListView)findViewById(R.id.listView1);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, CargoTracklist,
R.layout.listview,
new String[] { TAG_Status,TAG_Id, TAG_DateTime }, new int[] {
R.id.textView2,R.id.textView1, R.id.textView3});
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(MainActivity.this, "You Clicked at "+CargoTracklist.get(+position).get("Id"), Toast.LENGTH_SHORT).show();
}
});
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
Here is my json parser code:
package com.example.cargotracking;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
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.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
//public JSONObject getJSONFromUrl(String url, List params) {
public JSONObject getJSONFromUrl(String url, List<BasicNameValuePair> params) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
please help me to resolve this.
Thanks in advance

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Unable to get JSONObject from a url - java

"result" is JSONObject instead of JSONArray. get token String from result JSONObject as: JSONObject json_result = json.getJSONObject(TAG_RESULT); // Storing JSON item in a Variable token = json_result.getString(TAG_TOKEN);

Just make these two changes. result = json.getJSONArray(TAG_RESULT); to result = json.getJSONObject(TAG_RESULT); and JSONArray result; to JSONObject result;

Related

JSON Issue - how to fix that?

JSONObject isn't encoding like it should be?

while parsing data in json getting error java.lang.nullpointerexception & end of input character at 0

errors in extracting json object

How do I pass parameter to webservice and get json datas in listview

Categories

Resources