Develop Reference

When we click on item in listview then how we get id of that item

I have a json in which i have product_id and product_name through the Json products are showing in listview now i want that when clicked on item then id of that product should be show in toast. I am new to android i am unable to do this
can anyone tell me how can i do this please
public class CityNameActivity extends ListActivity{
ListView list;
private ProgressDialog pDialog;
// URL to get Cities JSON
private static String url = "http://14.140.200.186/Hospital/get_city.php";
// JSON Node names
private static final String TAG_CITIES = "Cities";
//private static final String TAG_ID = "id";
private static final String TAG_NAME = "city_name";
// Cities JSONArray
JSONArray Cities = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> citylist;
//ArrayList<String> citylist;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cityname_activity_main);
ListView listView=getListView();
citylist = new ArrayList<HashMap<String, String>>();
// list.setOnClickListener(this);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent in = new Intent(getApplicationContext(),
Specialities_Activity.class);
startActivity(in);}
});
new GetCities().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetCities extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(CityNameActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
Cities = jsonObj.getJSONArray(TAG_CITIES);
// looping through All Cities
for (int i = 0; i < Cities.length(); i++) {
JSONObject c = Cities.getJSONObject(i);
//String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
HashMap<String, String> Cities = new HashMap<String, String>();
Cities.put(TAG_NAME, name);
// adding contact to Cities list
citylist.add(Cities);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**`enter code here`
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(CityNameActivity.this, citylist, R.layout.city_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
setListAdapter(adapter);
}
}
Code of Service Handlerclass:
public class ServiceHandler {
static String response = null;
public final static int GET = 1;
public final static int POST = 2;
public ServiceHandler() {
}
/*
* Making service call
* #url - url to make request
* #method - http request method
* */
public String makeServiceCall(String url, int method) {
return this.makeServiceCall(url, method, null);
}
/*
* Making service call
* #url - url to make request
* #method - http request method
* #params - http request params
* */
public String makeServiceCall(String url, int method,
List<NameValuePair> params) {
try {
// http client
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
// Checking http request method type
if (method == POST) {
HttpPost httpPost = new HttpPost(url);
// adding post params
if (params != null) {
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpResponse = httpClient.execute(httpPost);
} else if (method == GET) {
// appending params to url
if (params != null) {
String paramString = URLEncodedUtils
.format(params, "utf-8");
url += "?" + paramString;
}
HttpGet httpGet = new HttpGet(url);
httpResponse = httpClient.execute(httpGet);
}
httpEntity = httpResponse.getEntity();
response = EntityUtils.toString(httpEntity);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
code of Hospital Activity in which hospital is showing in listview i want that not all hospitals show only show hospital of specific city
public class HospitalList_Activity extends ListActivity {
private ProgressDialog pDialog;
// URL to get Hospitals JSON
private static String url = "http://14.140.200.186/hospital/get_hospital.php";
// JSON Node names
private static final String TAG_HOSPITAL = "Hospitals";
//private static final String TAG_ID = "id";
private static final String TAG_NAME = "hospital_name";
// Hospitals JSONArray
JSONArray Hospitals = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> hospitallist;
//ArrayList<String> citylist;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_hospital_list_);
ListView listView=getListView();
hospitallist = new ArrayList<HashMap<String, String>>();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent in = new Intent(getApplicationContext(), Specialities_Activity.class);
startActivity(in);
}
});
new GetHospitals().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetHospitals extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(HospitalList_Activity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
Hospitals = jsonObj.getJSONArray(TAG_HOSPITAL);
// looping through All Cities
for (int i = 0; i < Hospitals.length(); i++) {
JSONObject c = Hospitals.getJSONObject(i);
//String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
HashMap<String, String> Hospitals = new HashMap<String, String>();
Hospitals.put(TAG_NAME, name);
// adding contact to Cities list
hospitallist.add(Hospitals);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**`enter code here`
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(HospitalList_Activity.this, hospitallist, R.layout.hospital_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
setListAdapter(adapter);
}
}

public class CityNameActivity extends ListActivity {
ListView list;
Map <String, String> cityListWithId = new HashMap<String, String>();
private ProgressDialog pDialog;
// URL to get Cities JSON
private static String url = "http://14.140.200.186/Hospital/get_city.php";
// JSON Node names
private static final String TAG_CITIES = "Cities";
private static final String TAG_ID = "city_id";
private static final String TAG_NAME = "city_name";
// Cities JSONArray
JSONArray Cities = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> citylist;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cityname_activity_main);
ListView listView=getListView();
citylist = new ArrayList<HashMap<String, String>>();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//String tagname = ((TextView) findViewById(R.id.name)).getText().toString();
Map<String, String> tempHashmap = (Map<String, String>) parent.getItemAtPosition(position);
String tagName = tempHashmap.get(TAG_NAME);
System.out.println("tagname" + tagName);
String tagId = (String)cityListWithId.get(tagName);
System.out.println("tagId" + tagId);
Toast.makeText(CityNameActivity.this, tagId,Toast.LENGTH_SHORT).show();
}
});
new GetCities().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetCities extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(CityNameActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
Cities = jsonObj.getJSONArray(TAG_CITIES);
// looping through All Cities
for (int i = 0; i < Cities.length(); i++) {
JSONObject c = Cities.getJSONObject(i);
//String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
cityListWithId.put(c.getString(TAG_NAME), c.getString(TAG_ID));
HashMap<String, String> Cities = new HashMap<String, String>();
Cities.put(TAG_NAME, name);
// adding contact to Cities list
citylist.add(Cities);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**`enter code here`
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(CityNameActivity.this, citylist, R.layout.city_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
setListAdapter(adapter);
}
}
}

On ItemClick() method you can add this to get the id of the product.
HashMap<String,String> data = cityList.get(position);
//position is the paramater from ItemClick
String id = data.get("your key for Id");

why you every time hit the service . as per my opinion don't call service in onItemClick . when you start activity or app start Async task and pass data to list view .
please find below code . i am just refactor few thing so please let me if there some thing wrong
public class CityNameActivity extends ListActivity
{
private ProgressDialog pDialog;
// URL to get Cities JSON
private static String url = "http://14.140.200.186/Hospital/get_city.php";
// JSON Node names
private static final String TAG_CITIES = "Cities";
//private static final String TAG_ID = "id";
private static final String TAG_NAME = "city_name";
// Cities JSONArray
JSONArray Cities = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> citylist;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
new GetCities().execute();
ListView listView=getListView();
citylist = new ArrayList<HashMap<String, String>>();
// list.setOnClickListener(this);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(citylist!=null && !citylist.isEmpty())
{
Toast.makeText(CityNameActivity.this,""+citylist.get(position).get(TAG_NAME).toString(),Toast.LENGTH_SHORT).show();
}
}
});
new GetCities().execute();
}
private class GetCities extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(CityNameActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
Cities = jsonObj.getJSONArray(TAG_CITIES);
// looping through All Cities
for (int i = 0; i < Cities.length(); i++) {
JSONObject c = Cities.getJSONObject(i);
//String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
HashMap<String, String> Cities = new HashMap<String, String>();
Cities.put(TAG_NAME, name);
// adding contact to Cities list
citylist.add(Cities);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**`enter code here`
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(CityNameActivity.this, citylist, R.layout.city_list_item, new String[] { TAG_NAME}, new int[] { R.id.name});
setListAdapter(adapter);
}
}
}

json parsing in android working with kimono api

I am working with a parsing json and fetching my json data from kimono.I am fetching json from following url:
http://www.brankart.com/test/tra.json
My mainactivity goes as follows:
public class MainActivity extends ListActivity {
private ProgressDialog pDialog;
// URL to get contacts JSON
private static String url = "http://www.brankart.com/test/tra.json";
// JSON Node names
private static final String lnk = "href";
private static final String d1 = "text";
private static final String dt = "property2";
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(lnk, name);
in.putExtra(dt, cost);
in.putExtra(d1, description);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONObject nsb = jsonObj.getJSONObject("results");
// Getting JSON Array node
contacts = nsb.getJSONArray("collection1");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
JSONObject p1 = c.getJSONObject("property1");
String link = p1.getString(lnk);
String descp = p1.getString(d1);
String detail = p1.getString(dt);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(lnk, link);
contact.put(d1, descp);
contact.put(dt, detail);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { d1, dt,
lnk }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}
}
I am still not able to fetch my json in listview.Please help

Try change doInBackground like below
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONObject nsb = jsonObj.getJSONObject("results");
// Getting JSON Array node
contacts = nsb.getJSONArray("collection1");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
JSONObject c = contacts.getJSONObject(i);
JSONObject p1 = c.getJSONObject("property1");
String link = p1.getString(lnk);
String descp = p1.getString(d1);
//change here !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
String detail = c.getString(dt);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put(lnk, link);
contact.put(d1, descp);
contact.put(dt, detail);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}

Json String to Image

So I'm stuck on this... I need to display images in a listview which gets its data from a json file.
I've already setup the connection, parsed the json file and displayed what i need. But somehow I can't find much information about how to turn a string (which has the URL) into an image in a listview.
The string which has the url is called "ImageLink"
Below is my MainActivity.
public class MainActivity extends ListActivity {
private ProgressDialog pDialog;
// URL to get game info JSON
private static String url = "https://dl.dropboxusercontent.com/u/38379784/Upcoming%20Games/DataForUPG.js";
// JSON Node names
private static final String TAG_Games = "games";
private static final String TAG_Title = "Title";
private static final String TAG_Description = "Description";
private static final String TAG_Release = "Release";
private static final String TAG_ImageLink = "ImageLink";
// Gameinfo JSONArray
JSONArray games = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> GamesList;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GamesList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String Title = ((TextView) view.findViewById(R.id.Title))
.getText().toString();
String Description = ((TextView) view.findViewById(R.id.Description))
.getText().toString();
String Release = ((TextView) view.findViewById(R.id.Release))
.getText().toString();
String ImageLink = ((TextView) view.findViewById(R.id.ImageLink_label))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleListItem.class);
in.putExtra(TAG_Title, Title);
in.putExtra(TAG_Description, Description);
in.putExtra(TAG_Release, Release);
in.putExtra(TAG_ImageLink, ImageLink);
startActivity(in);
}
});
// Calling async task to get json
new GetGames().execute();
}
/**
* Async task class to get json by making HTTP call
* */
private class GetGames extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading Data...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
games = jsonObj.getJSONArray(TAG_Games);
// looping through All games
for (int i = 0; i < games.length(); i++) {
JSONObject c = games.getJSONObject(i);
String Title = c.getString(TAG_Title);
String Description = c.getString(TAG_Description);
String Release = c.getString(TAG_Release);
String ImageLink = c.getString(TAG_ImageLink);
// tmp hashmap for single game
HashMap<String, String> games = new HashMap<String, String>();
// adding each child node to HashMap key => value
games.put(TAG_Title, Title);
games.put(TAG_Description, Description);
games.put(TAG_Release, Release);
games.put(TAG_ImageLink, ImageLink);
// adding contact to gameinfo list
GamesList.add(games);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, GamesList,
R.layout.list_item, new String[] { TAG_Title, TAG_Release,
TAG_Description, TAG_ImageLink }, new int[] { R.id.Title,
R.id.Release, R.id.Description, R.id.ImageLink_label });
setListAdapter(adapter);
}
}
}
I would appreciate any help

Well, you could probably create another async task to handle downloading the image like this:
private class DownloadImg extends AsyncTask<String, Void, Bitmap>{
#Override
protected Bitmap doInBackground(String... params) {
// TODO Auto-generated method stub
String TAG_ImageLink = params[0];
Bitmap bm = null;
try {
InputStream in = new java.net.URL(TAG_ImageLink).openStream();
bm = BitmapFactory.decodeStream(in);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bm;
}
#Override
protected void onPostExecute(Bitmap result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
}
or you could use a 3rd party image loading library like picasso or volley's ImageRequest

can't create multiple choice listview

This is my code i can't create the multiple choice mode listview.
Data is fetched by jason and set in the listview.
I want to multiple selection choice mode on the list view
public class ExamView extends ListActivity{
private ProgressDialog pDialog;
Intent activity;
// URL to get contacts JSON
// JSON Node names
private static final String TAG_USERMST = "products";
private static final String TAG_QID = "que_id";
private static final String TAG_QUE = "question";
private static final String TAG_QANS = "ans";
JSONArray products = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.user_activity_lv);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
new GetContacts().execute();
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(ExamView.this);
pDialog.setMessage("Exam Paper is downloading...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
products = jsonObj.getJSONArray(TAG_USERMST);
// looping through All Contacts
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
String queid = c.getString(TAG_QID);
String que = c.getString(TAG_QUE);
String queans = c.getString(TAG_QANS);
// tmp hashmap for single contact
HashMap<String, String> product = new HashMap<String, String>();
// adding each child node to HashMap key => value
product.put(TAG_QID,queid);
product.put(TAG_QUE, que);
product.put(TAG_QANS, queans);
// adding contact to contact list
contactList.add(product);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
ExamView.this, contactList,
R.layout.user_list_item_lbl, new String[] { TAG_QID, TAG_QUE,
TAG_QANS }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}

getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
setListAdapter(new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_multiple_choice, array_sort));
Use this code its working for me.
Here array_sort is an arraylist i.e. list of all the items to be displayed.
Multiple items can be selected with this.

JSON to listView in android

I'm trying to put JSON to ListView. I am getting data from http://api.androidhive.info/contacts/ (only using the name field) I am able to get them to array, but im unable to put them into the list,
[NOTE]
however the ListView makes exactly 13 lines for 13 entries (number of names) but the lines are blank.
private class GetJidla extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(TableMenuActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
#Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
jidla = jsonObj.getJSONArray(TAG_CONTACTS);
// looping through All Contacts
for (int i = 0; i < jidla.length(); i++) {
JSONObject c = jidla.getJSONObject(i);
// String id = c.getString(TAG_ID);
String name = c.getString(TAG_NAME);
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
// contact.put(TAG_ID, id);
contact.put(TAG_NAME, name);
// adding contact to contact list
jidlaList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
TableMenuActivity.this, jidlaList,
android.R.layout.simple_list_item_1, new String[] {TAG_NAME}, new int[] {android.R.id.list,
});
menu = (ListView)findViewById(android.R.id.list);
menu.setAdapter(adapter);
}
and the list is here
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dip" >
</ListView>
i need it to be on one screen, in one activity here is the image, the brown lsit is where i need it

I have an exemple to do that:
public class MainActivity extends Activity {
//json string
private String jsonString = "{\"employee\":[{\"emp_name\":\"employee1\",\"emp_no\":\"101700\"},{\"emp_name\":\"employee2\",\"emp_no\":\"101701\"},{\"emp_name\":\"employee3\",\"emp_no\":\"101702\"},"+
"{\"emp_name\":\"employee4\",\"emp_no\":\"101703\"},{\"emp_name\":\"employee5\",\"emp_no\":\"101704\"},{\"emp_name\":\"employee6\",\"emp_no\":\"101705\"},"+
"{\"emp_name\":\"employee7\",\"emp_no\":\"101706\"},{\"emp_name\":\"employee8\",\"emp_no\":\"101707\"},{\"emp_name\":\"employee9\",\"emp_no\":\"101708\"},"+
"{\"emp_name\":\"employee10\",\"emp_no\":\"101709\"},{\"emp_name\":\"employee11\",\"emp_no\":\"101710\"},{\"emp_name\":\"employee12\",\"emp_no\":\"101711\"},"+
"{\"emp_name\":\"employee13\",\"emp_no\":\"101712\"},{\"emp_name\":\"employee14\",\"emp_no\":\"101713\"},{\"emp_name\":\"employee15\",\"emp_no\":\"101712\"}]}";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initList();
ListView listView = (ListView) findViewById(R.id.listView1);
SimpleAdapter simpleAdapter = new SimpleAdapter(this, employeeList, android.R.layout.simple_list_item_1, new String[] {"employees"}, new int[] {android.R.id.text1});
listView.setAdapter(simpleAdapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
List<Map<String,String>> employeeList = new ArrayList<Map<String,String>>();
private void initList(){
try{
JSONObject jsonResponse = new JSONObject(jsonString);
JSONArray jsonMainNode = jsonResponse.optJSONArray("employee");
for(int i = 0; i<jsonMainNode.length();i++){
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
String name = jsonChildNode.optString("emp_name");
String number = jsonChildNode.optString("emp_no");
String outPut = name + "-" +number;
employeeList.add(createEmployee("employees", outPut));
}
}
catch(JSONException e){
Toast.makeText(getApplicationContext(), "Error"+e.toString(), Toast.LENGTH_SHORT).show();
}
}
private HashMap<String, String>createEmployee(String name,String number){
HashMap<String, String> employeeNameNo = new HashMap<String, String>();
employeeNameNo.put(name, number);
return employeeNameNo;
}
}
I use this code and it works fine!
Code from JSON Exemple

Here is the very simple example for json to list view
http://www.androidhive.info/2012/01/android-json-parsing-tutorial/
download the project and use your own service in MainActivity.java
replace the service URl with your url and format your array accordingly thatz it
happy coding.