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unable get json from url

i have to create simple login page where after entering username and password we click to submit button. when we click on submit button then it goes to server and check the username and other information if the info matches then it moves to next activity otherwise nothing will happen . below is my code . i dont know how to do after getting response from the server.
package com.example.dev_1.myapplication;
import android.app.DownloadManager;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.net.Uri
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.lang.ref.ReferenceQueue;
import java.net.HttpURLConnection;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.sql.Connection;
public class MainActivity extends AppCompatActivity {
Button button;
String connectionString, params;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText username = (EditText) findViewById(R.id.editText);
final EditText password = (EditText) findViewById(R.id.editText2);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener((new View.OnClickListener() {
#Override
public void onClick(View v) {
if (v.getId() == R.id.button1) {
String userNameString = username.getText().toString();
String passwordString = password.getText().toString();
String url = "http://122.160.78.189:82/androidserver/LoginSalesPerson";
String params = null;
try {
params = "user=" + URLEncoder.encode(userNameString, "UTF-8") + "&password=" + URLEncoder.encode(passwordString, "UTF-8") + "&appVersion=1.26";
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
JSONArray dataJsonArr = null;
new Mytask().execute(url, params);
}
}
}));
}
private void checkLogin(String result) throws JSONException {
String url = "http://122.160.78.189:82/androidserver/LoginSalesPerson";
JSONArray user = null;
try{
// Creating new JSON Parser
///JSONParser jParser = new JSONParser();
// Getting JSON from URL
// JSONObject json = jParser.getJSONFromUrl(url);
if (result != null)
{
//JSONObject emp=(new JSONObject(url).getJSONObject("username"));
JSONObject emp = new JSONObject(result.toString());
String username=emp.getString("userName");
//String empspassword=emp.getString("password");
String str="username:"+username;
Intent intent = new Intent(MainActivity.this, Main2Activity.class);
intent.putExtra("username", str);
startActivity(intent);}
}catch (Exception e) {
e.printStackTrace();
}
}
// EditText usernameString = (EditText) findViewById(R.id.editText);
// String str = usernameString.getText().toString();
// if (sharedPreferences.equals(str)) {
// Intent intent = new Intent(MainActivity.this, Main2Activity.class);
// intent.putExtra("username", str);
//startActivity(intent);
// To retrieve value from shared preference in another activity
// sharedPreferences = getApplicationContext().getSharedPreferences(
// "sharedPrefName", 0);
// id = sharedPreferences.getString("key_name", "defaultvalue");
class Mytask extends AsyncTask<String, Void, String> {
// Runs in UI before background thread is called
#Override
protected void onPreExecute() {
setProgressBarVisibility(true);
// Do something like display a progress bar
}
// This is run in a background thread
#Override
protected String doInBackground(String... params) {
return getFromServer(params[0], params[1]);
}
// This runs in UI when background thread finishes
#Override
protected void onPostExecute(String result) {
try {
checkLogin(result);
} catch (JSONException e) {
e.printStackTrace();
}
}
public String getFromServer(String connectionString, String params) {
String response = "";
try {
// android.os.Debug.waitForDebugger();
URL url = new URL(connectionString);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setConnectTimeout(10 * 1000); //10 Seconds
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("Content-Length", "" + Integer.toString(params.getBytes().length));
con.setRequestProperty("Content-Language", "en-US");
con.setUseCaches(false);
con.setDoInput(true);
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(params);
wr.flush();
wr.close();
InputStream is = con.getInputStream();
response = read(is);
} catch (Exception e) {
e.printStackTrace();
} finally {
return response;
}
}
private String read(InputStream in) {
BufferedReader reader;
StringBuilder response = new StringBuilder();
try {
reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
response.append(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
return response.toString();
}
}
}
}

HTTP post request returns HTML code instead of JSON data

I am trying to develop a simple client-server application in Android. I have a problem while fetching a response from PHP code. It returns an HTML code instead of JSON. Is it a problem with the WAMP server I have used?
Here is the PHP code:
<?php
include_once './connect_db.php';
$db = new DBConnect();
$response = array();
$username = $_POST["username"];
$password = $_POST["password"];
if (empty($_POST['username']) || empty($_POST['password']))
{
$response["success"] = 0;
$response["message"] = "One or both of the fields are empty.";
die(json_encode($response));
}
$query = " SELECT * FROM account WHERE username = '$username'and password='$password'";
$sql1 = mysql_query($query);
$row = mysql_fetch_array($sql1);
if (!empty($row))
{
$response["success"] = 1;
$response["message"] = "You have been sucessfully login";
die(json_encode($response));
}
else
{
$response["success"] = 0;
$response["message"] = "invalid username or password ";
die(json_encode($response));
}
mysql_close();
?>
login.java:
package com.example.rossh.register;
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.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
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 login extends AppCompatActivity implements OnClickListener {
private EditText user, pass;
private Button login;
JSONObject jsonObject;
String response;
// Progress Dialog
private ProgressDialog pDialog;
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//setup input fields
user = (EditText) findViewById(R.id.username);
pass = (EditText) findViewById(R.id.password);
//setup buttons
login = (Button) findViewById(R.id.btnlogin);
//register listeners
login.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.btnlogin:
String username = user.getText().toString();
String password = pass.getText().toString();
boolean cancel =false;
View focusView = null;
if(TextUtils.isEmpty(username))
{
user.setError("This field is required!!");
cancel=true;
focusView=user;
}
if(TextUtils.isEmpty(password))
{
pass.setError("This field is requird!!!");
cancel=true;
focusView=pass;
}
if(cancel)
{
focusView.requestFocus();
} else {
new AttemptLogin().execute(username, password);
}
break;
default:
break;
}
}
class AttemptLogin extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
*/
boolean failure = false;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(login.this);
pDialog.setMessage("Attempting login...");
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
String username = args[0];
String password = args[1];
// Building Parameters
final int success;
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
Log.d("request!", "starting");
// getting product details by making HTTP request
JsonParser jsonParser = new JsonParser();
jsonObject = jsonParser.makeHttpRequest(AppConfig.LOGIN_URL, "POST", params);
if (jsonObject != null) {
try{
Log.d("Json data",">"+jsonObject);
success = jsonObject.getInt(TAG_SUCCESS);
if (success == 1) {
response = jsonObject.getString(TAG_MESSAGE);
} else {
Log.d("Login Failure!", jsonObject.getString(TAG_MESSAGE));
response = jsonObject.getString(TAG_MESSAGE);
}
} catch(JSONException e) {
e.printStackTrace();
}
}
return response;
}
/**
* After completing background task Dismiss the progress dialog
**/
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null) {
Toast.makeText(login.this, "ok", Toast.LENGTH_LONG).show();
}
}
}
}
}
jsonParser.java:
package com.example.rossh.register;
import android.util.Log;
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.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
import android.widget.Toast;
public class JsonParser {
InputStream is = null;
static String json = "";
static JSONObject jObj = null;
// constructor
public JsonParser() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method, List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
httpPost.setHeader("Content-Type","application/json");
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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, HTTP.UTF_8), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
Log.d("String",">"+json);
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
JSONArray jsonarray = new JSONArray(json);
jObj = jsonarray.getJSONObject(0);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing " + e.toString());
}
// return JSON String
return jObj;
}
}

It may be due to one or more errors in your HTML, or if your page returns non-text objects. Make sure your HTML webpage does not throw an error while running from browser.

For one thing I would suggest that your PHP script sets proper content type when returning json, see Returning JSON from a PHP Script. Also see Java HttpRequest JSON & Response Handling for how to do JSON requests in java.

Try changing die(json_encode($response)) to echo json_encode($response)

How to add a Parsed JSON image from URL to imageView Dynamically?

I have the following code and i like to add my parsed JSON image from URL to my ImageView I don't know how to do it and my code is the following (I get responce and the other data go the desired TextViews):
DisplaySearchResultsActivity.java
package com.cloudlionheart.museumsearchapplication;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class DisplaySearchResultsActivity extends ListActivity
{
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> museumItemsList;
// url to get all products list
private static String url_search_results = "http://10.0.3.2/android_connect/get_all_products.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_MUSEUM_ITEMS = "museumItems";
private static final String TAG_MUSEUM_ITEM_ID = "id";
private static final String TAG_MUSEUM_ITEM_NAME = "itemName";
private static final String TAG_MUSEUM_ITEM_ARTIST = "artistName";
private static final String TAG_MUSEUM_ITEM_LOCATION = "itemLocation";
private static final String TAG_MUSEUM_ITEM_HISTORICAL_PERIOD = "itemHistoricalPeriod";
private static final String TAG_MUSEUM_ITEM_IMAGE = "itemImage";
// products JSONArray
JSONArray museumItems = null;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_search_resaults);
// Hashmap for ListView
museumItemsList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
// Get listview
ListView lv = getListView();
}
/**
* Background Async Task to Load all product by making HTTP Request
*/
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
*/
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(DisplaySearchResultsActivity.this);
pDialog.setMessage("Loading Museum Items. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
*/
protected String doInBackground(String... args)
{
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_search_results, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Museum Items: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
museumItems = json.getJSONArray(TAG_MUSEUM_ITEMS);
// looping through All Products
for (int i = 0; i < museumItems.length(); i++)
{
JSONObject c = museumItems.getJSONObject(i);
// Storing each json item in variable
String item_id = c.getString(TAG_MUSEUM_ITEM_ID);
String item_name = c.getString(TAG_MUSEUM_ITEM_NAME);
String item_artist = c.getString(TAG_MUSEUM_ITEM_ARTIST);
String item_historic_period = c.getString(TAG_MUSEUM_ITEM_HISTORICAL_PERIOD);
String item_location = c.getString(TAG_MUSEUM_ITEM_LOCATION);
String list_image = c.getString(TAG_MUSEUM_ITEM_IMAGE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_MUSEUM_ITEM_ID, item_id);
map.put(TAG_MUSEUM_ITEM_NAME, item_name);
map.put(TAG_MUSEUM_ITEM_ARTIST, item_artist);
map.put(TAG_MUSEUM_ITEM_HISTORICAL_PERIOD, item_historic_period);
map.put(TAG_MUSEUM_ITEM_LOCATION, item_location);
map.put(TAG_MUSEUM_ITEM_IMAGE, list_image);
// adding HashList to ArrayList
museumItemsList.add(map);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* *
*/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
DisplaySearchResultsActivity.this, museumItemsList,
R.layout.list_item, new String[]{TAG_MUSEUM_ITEM_ID,
TAG_MUSEUM_ITEM_NAME, TAG_MUSEUM_ITEM_ARTIST,
TAG_MUSEUM_ITEM_HISTORICAL_PERIOD, TAG_MUSEUM_ITEM_LOCATION,
TAG_MUSEUM_ITEM_IMAGE},
new int[]{R.id.museum_item_id, R.id.museum_item_name,
R.id.museum_item_artist, R.id.museum_item_historic_period,
R.id.museum_item_location, R.id.museum_list_image});
// updating listview
setListAdapter(adapter);
}
});
}
}
}
and my other class
JSONParser.java
package com.cloudlionheart.museumsearchapplication;
/**
* Created by CloudLionHeart on 5/7/2015.
*/
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.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
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() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// 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();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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;
}
}

Using Picasso:
Picasso.with(context)
.load(imageUrl)
.into(imageView);

You can use image loader library to load image dynamically into imageview.
As it given easy documentation, just follow it. You have to pass url of image.

I Hope it will help you..!
public class LoadImageFromURL extends AsyncTask{
#Override
protected Bitmap doInBackground(String... params) {
try {
URL url = new URL("image-url");
InputStream is = url.openConnection().getInputStream();
Bitmap bitMap = BitmapFactory.decodeStream(is);
return bitMap;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Bitmap result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
yourImageview.setImageBitmap(result);
}
}
<uses-permission android:name="android.permission.INTERNET"/>
add Permission into you manifest.

Username to Appear on Screen based on details entered

I'm using the same topic as before just changed the title that way the codes already here. I've got my login screen working as I wanted it; turned out to be a stupid typo. Now what I need help with is displaying the currently logged in users username on the homescreen (after login)
I added this to my Login.java file to try and store the information:
if (success == 1) {
Log.d("Login Successful!", json.toString());
//Save Logged in User
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(Login.this);
Editor edit = sp.edit();
edit.putString("username", username);
edit.commit();
I just don't know how to re-call a value from the Shared Preferences from a different classfile... I want the current username to display on Home.java but I've called the shared preferences on Login.java, any help appreciated. I've posted the Login and Home files (P.S. My home layout file has a text view named storedUser if that helps.
Login.java
package com.example.accumuwinner;
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.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
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 Login extends Activity implements OnClickListener{
private EditText user, pass;
private Button mSubmit, mRegister;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//php login script location:
//localhost :
//testing on your device
//put your local ip instead, on windows, run CMD > ipconfig
//or in mac's terminal type ifconfig and look for the ip under en0 or en1
// private static final String LOGIN_URL = "http://xxx.xxx.x.x:1234/webservice/login.php";
//testing on Emulator:
private static final String LOGIN_URL = "http://192.168.0.7:8080/webservice/login.php";
//testing from a real server:
//private static final String LOGIN_URL = "http://www.yourdomain.com/webservice/login.php";
//JSON element ids from repsonse of php script:
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
//setup input fields
user = (EditText)findViewById(R.id.username);
pass = (EditText)findViewById(R.id.password);
//setup buttons
mSubmit = (Button)findViewById(R.id.login);
mRegister = (Button)findViewById(R.id.register);
//register listeners
mSubmit.setOnClickListener(this);
mRegister.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.login:
new AttemptLogin().execute();
break;
case R.id.register:
Intent i = new Intent(this, Register.class);
startActivity(i);
break;
default:
break;
}
}
class AttemptLogin extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
boolean failure = false;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Login.this);
pDialog.setMessage("Attempting login...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String username = user.getText().toString();
String password = pass.getText().toString();
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", username));
params.add(new BasicNameValuePair("password", password));
Log.d("request!", "starting");
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(
LOGIN_URL, "POST", params);
// check your log for json response
Log.d("Login attempt", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("Login Successful!", json.toString());
Intent i = new Intent(Login.this, Home.class);
finish();
startActivity(i);
return json.getString(TAG_MESSAGE);
}else{
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null){
Toast.makeText(Login.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
Home.java
package com.example.accumuwinnerbettingtips;
import android.app.Activity;
import android.os.Bundle;
public class Home extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
}
}

Can't Convert to JSONArray for showing in ListView

i'm try to convert json array from internet to listview. the php code in server work correctly and return the json string below.
the result json in logcat is :
11-09 20:47:04.170: I/AllNotes >> jSon >>(429): {"notes":{"3":{"note_subject":"dshjdsfjsdfsdhf","note_id":"4","note_date":"0000-00-00"},"2":{"note_subject":"dshjdsfjsdfsdhf","note_id":"3","note_date":"0000-00-00"},"1":{"note_subject":"dshjdsfjsdfsdhf","note_id":"2","note_date":"0000-00-00"},"0":{"note_subject":"dshjdsfjsdfsdhf","note_id":"1","note_date":"0000-00-00"},"7":{"note_subject":"dshjdsfjsdfsdhf","note_id":"8","note_date":"1391\/8\/19"},"6":{"note_subject":"dshjdsfjsdfsdhf","note_id":"7","note_date":""},"5":{"note_subject":"dshjdsfjsdfsdhf","note_id":"6","note_date":""},"4":{"note_subject":"dshjdsfjsdfsdhf","note_id":"5","note_date":""}},
"success":"1"}
my JSONParser class is :
package ir.mohammadi.android.nightly;
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.NameValuePair;
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.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = null;
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Make HTTP connection
try {
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();
Log.i("Input stream >> ", is.toString());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
Log.i("JSON string builder >> ", json.toString());
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
try {
jObj = new JSONObject(json.substring(1, json.length()));
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
return jObj;
}
}
error is : at notes of type org.json.JSONObject cannot be converted to JSONArray
the code that show json in list view is :
package ir.mohammadi.android.nightly;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class AllNotes extends ListActivity {
ProgressDialog pDialog;
ArrayList<HashMap<String, String>> noteList;
JSONArray notes = null;
JSONObject jSon = null;
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR_MSG = "error_message";
private static String KEY_NOTE_ID = "note_id";
private static String KEY_NOTE_SUBJECT = "note_subject";
private static String KEY_NOTE_DATE = "note_date";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.note_list);
noteList = new ArrayList<HashMap<String, String>>();
new LoadAllNotes().execute();
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String note_id = ((TextView) view
.findViewById(R.id.list_lbl_id)).getText().toString();
Intent i = new Intent(getApplicationContext(), NoteDetail.class);
i.putExtra("note_id", note_id);
startActivityForResult(i, 100);
}
});
}
public class LoadAllNotes extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllNotes.this);
pDialog.setMessage("لطفا صبر کنید...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
protected String doInBackground(String... args) {
UserFunctions userFunctions = new UserFunctions();
jSon = userFunctions.getAllNotes("12");
Log.i("AllNotes >> jSon >>", jSon.toString());
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
try {
if (jSon.has(KEY_SUCCESS)) {
String success = jSon.getString(KEY_SUCCESS);
if (success.equals("1")) {
notes = jSon.getJSONArray("notes");
for (int i = 0; i < notes.length(); i++) {
JSONObject c = notes.getJSONObject(i);
String id = c.getString(KEY_NOTE_ID);
String subject = c.getString(KEY_NOTE_SUBJECT);
String date = c.getString(KEY_NOTE_DATE);
HashMap<String, String> map = new HashMap<String, String>();
map.put(KEY_NOTE_ID, id);
map.put(KEY_NOTE_SUBJECT, subject);
map.put(KEY_NOTE_DATE, date);
noteList.add(map);
}
}
} else {
finish();
Toast.makeText(getApplicationContext(),
jSon.getString(KEY_ERROR_MSG), Toast.LENGTH_SHORT)
.show();
Log.i("AllNotes >> No nightly >>", "...");
Intent i = new Intent(getApplicationContext(), login.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
runOnUiThread(new Runnable() {
public void run() {
ListAdapter adapter = new SimpleAdapter(AllNotes.this,
noteList, R.layout.list_item, new String[] {
KEY_NOTE_ID, KEY_NOTE_SUBJECT,
KEY_NOTE_DATE }, new int[] {
R.id.list_lbl_id, R.id.list_lbl_subject,
R.id.list_lbl_date });
setListAdapter(adapter);
}
});
}
}
}
and the php code is :
public function getNotesList($user_id)
{
$result = mysql_query("SELECT `id`, `note_subject`, `note_date` FROM `tbl_notes` WHERE `user_id` = '$user_id'");
if (mysql_num_rows($result) > 0) {
$response = array();
$response["success"] = "1";
$response["notes"] = array();
while ($row = mysql_fetch_array($result)) {
$note = array();
$note["note_id"] = $row["id"];
$note["note_subject"] = $row["note_subject"];
$note["note_date"] = $row["note_date"];
array_push($response["notes"], $note);
}
return $response;
}
}
and
if ($tag == 'getNotesList') {
$user_id = $_POST['user_id'];
$result = $db->getNotesList($user_id);
if ($result) {
error_log("Index getNotesList Json >>" . json_encode($result) . "\r\n", 3,
"Log.log");
echo json_encode($result, JSON_FORCE_OBJECT);
} else {
$response["error"] = "1";
$response["error_message"] = "no row";
echo json_encode($response, JSON_FORCE_OBJECT);
}
}
how can i fix this? thanks.

use
JSONObject notes = jSon.getJSONObject("notes");
instead of
JSONArray notes = jSon.getJSONArray("notes");`
Because your json String is collection of JsonOject's it's not contains any JsonArray.
you can use following json checker site before parsing it to known the structure of Json String
http://jsonviewer.stack.hu/