How do I populate an Android spinner using a JSON web service?

How do I populate an Android spinner using a JSON web service? - android

How do I parse a JSON file like the one below containing school names and IDs and use the values in the "Name" field to populate the spinner lables?
I want the spinner to output the selected SchoolID to the next activity. E.g. So you see "Hill View Elementary" and if you select this the value "HVE" is output to the next activity to act on.
{
"schools": [
{
"Name": "Hill View Elementary",
"SchoolID": "HVE"},
{
"Name": "Mill View",
"SchoolID": "MVE"},
{
"Name": "Big School",
"SchoolID": "BSC"},
]
}
Here is the onCreate I'm using to attempt to read the feed...
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String readFeed = readFeed();
try {
JSONArray jsonArray = new
JSONArray(readFeed);
Log.i(MainActivity.class.getName(),
"Number of entries " + jsonArray.length());
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
// Here instead of Logging I want to use each schools "Name" to
// be put into an array that I can use to populate the strings
// for the spinner
Log.i(MainActivity.class.getName(), jsonObject.getString("schools"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
I'm still coming up to speed on Android so clarity appreciated.
Here is readfeed:
public String readFeed() {
StringBuilder builder = new StringBuilder();
HttpClient client = new DefaultHttpClient();
// domain intentionally obfuscated for security reasons
HttpGet httpGet = new HttpGet("http://www.domain.com/schools.php");
try
{
HttpResponse response = client.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String
line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
} else {
Log.e(MainActivity.class.toString(), "Failed to download file");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
return builder.toString();
}

I would do something like this:
public class School {
private String name;
private String id;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
On create:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String readFeed = readFeed();
// you can use this array to find the school ID based on name
ArrayList<School> schools = new ArrayList<School>();
// you can use this array to populate your spinner
ArrayList<String> schoolNames = new ArrayList<String>();
try {
JSONObject json = new JSONObject(readFeed);
JSONArray jsonArray = new JSONArray(json.optString("schools"));
Log.i(MainActivity.class.getName(),
"Number of entries " + jsonArray.length());
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
School school = new School();
school.setName(jsonObject.optString("Name"));
school.setId(jsonObject.optString("SchoolID"));
schools.add(school);
schoolNames.add(jsonObject.optString("Name"));
}
} catch (Exception e) {
e.printStackTrace();
}
Spinner mySpinner = (Spinner)findViewById(R.id.my_spinner);
mySpinner.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, schoolNames));
}
In your main_activity.xml you need a Spinner. The code above would work with a Spinner named like below:
<Spinner
android:id="#+id/my_spinner"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>

Related

Nothing happens in the try

In this activity, i get places nearby and add them to a listview. I wanted also to add the place's phone number in an arrayList like the other datas, so i had to use place details request. So, i get all the place_id for all the places from the arrayList and launch the query to get the details (phone number). The problem is in class "readFromGooglePlaceDetailsAPI", it goes in the "try" and goes out with nothing happening, i don't know why!!! I only can see "IN TRY !!!" and then "----" from the println.
Is my sequence not right?
Where is the problem and what is the solution ?
public class ListActivity extends Activity implements OnItemClickListener {
public ArrayList<GetterSetter> myArrayList;
ArrayList<GetterSetter> detailsArrayList;
ListView myList;
ProgressDialog dialog;
TextView nodata;
CustomAdapter adapter;
GetterSetter addValues;
GetterSetter addDetails;
private LocationManager locMan;
#Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_view_activity);
if (!isNetworkAvailable()) {
Toast.makeText(getApplicationContext(), "Enable internet connection and RE-LAUNCH!!",
Toast.LENGTH_LONG).show();
return;
}
myList = (ListView) findViewById(R.id.placesList);
placeSearch();
}
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null;
}
public void placeSearch() {
//get location manager
locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
//get last location
Location lastLoc = locMan.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
double lat = lastLoc.getLatitude();
double lng = lastLoc.getLongitude();
dialog = ProgressDialog.show(this, "", "Please wait", true);
//build places query string
String placesSearchStr;
placesSearchStr = "https://maps.googleapis.com/maps/api/place/nearbysearch/" +
"json?location="+lat+","+lng+
"&radius=1000&sensor=true" +
"&types="+ ServicesListActivity.types+
"&key=My_KEY";
//execute query
new readFromGooglePlaceAPI().execute(placesSearchStr);
myList.setOnItemClickListener(this);
}
public void detailsSearch() {
String detailsSearchStr;
//build places query string
for(int i=0; i < myArrayList.size(); i++){
detailsSearchStr = "https://maps.googleapis.com/maps/api/place/details/json?" +
"placeid=" + myArrayList.get(i).getPlace_id() +
"&key=My_KEY";
Log.d("PlaceID:", myArrayList.get(i).getPlace_id());
//execute query
new readFromGooglePlaceDetailsAPI().execute(detailsSearchStr);
}
}
public class readFromGooglePlaceDetailsAPI extends AsyncTask<String, Void, String> {
#Override protected String doInBackground(String... param) {
return readJSON(param[0]);
}
protected void onPostExecute(String str) {
detailsArrayList = new ArrayList<GetterSetter>();
String phoneNumber =" -NA-";
try {
System.out.println("IN TRY !!!");
JSONObject root = new JSONObject(str);
JSONArray results = root.getJSONArray("result");
System.out.println("Before FOR !!!");
for (int i = 0; i < results.length(); i++) {
System.out.println("IN FOR LOOP !!!");
addDetails = new GetterSetter();
JSONObject arrayItems = results.getJSONObject(i);
if(!arrayItems.isNull("formatted_phone_number")){
phoneNumber = arrayItems.getString("formatted_phone_number");
Log.d("Phone Number ", phoneNumber);
}
addDetails.setPhoneNumber(phoneNumber);
System.out.println("ADDED !!!");
detailsArrayList.add(addDetails);
Log.d("Before", detailsArrayList.toString());
}
} catch (Exception e) {
}
System.out
.println("------------------------------------------------------------------");
Log.d("After:", detailsArrayList.toString());
// nodata = (TextView) findViewById(R.id.nodata);
//nodata.setVisibility(View.GONE);
// adapter = new CustomAdapter(ListActivity.this, R.layout.list_row, detailsArrayList);
// myList.setAdapter(adapter);
//adapter.notifyDataSetChanged();
// dialog.dismiss();
}
}
public class readFromGooglePlaceAPI extends AsyncTask<String, Void, String> {
#Override protected String doInBackground(String... param) {
return readJSON(param[0]);
}
protected void onPostExecute(String str) {
myArrayList = new ArrayList<GetterSetter>();
String rating=" -NA-";
try {
JSONObject root = new JSONObject(str);
JSONArray results = root.getJSONArray("results");
for (int i = 0; i < results.length(); i++) {
addValues = new GetterSetter();
JSONObject arrayItems = results.getJSONObject(i);
JSONObject geometry = arrayItems.getJSONObject("geometry");
JSONObject location = geometry.getJSONObject("location");
//place ID for place details later
String placeID = arrayItems.getString("place_id").toString();
if(!arrayItems.isNull("rating")){
rating = arrayItems.getString("rating");
}
addValues.setPlace_id(placeID);
addValues.setLat(location.getString("lat"));
addValues.setLon(location.getString("lng"));
addValues.setName(arrayItems.getString("name").toString());
addValues.setRating(rating);
addValues.setVicinity(arrayItems.getString("vicinity").toString());
myArrayList.add(addValues);
//Log.d("Before", myArrayList.toString());
}
} catch (Exception e) {
}
// System.out
// .println("############################################################################");
// Log.d("After:", myArrayList.toString());
nodata = (TextView) findViewById(R.id.nodata);
nodata.setVisibility(View.GONE);
adapter = new CustomAdapter(ListActivity.this, R.layout.list_row, myArrayList);
myList.setAdapter(adapter);
//adapter.notifyDataSetChanged();
dialog.dismiss();
detailsSearch();
}
}
public String readJSON(String URL) {
StringBuilder sb = new StringBuilder();
HttpGet httpGet = new HttpGet(URL);
HttpClient client = new DefaultHttpClient();
try {
HttpResponse response = client.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == 200) {
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} else {
Log.e("JSON", "Couldn't find JSON file");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
#Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
Intent details = new Intent(ListActivity.this, Details.class);
details.putExtra("name", myArrayList.get(arg2).getName());
details.putExtra("rating", myArrayList.get(arg2).getRating());
details.putExtra("vicinity", myArrayList.get(arg2).getVicinity());
details.putExtra("lat", myArrayList.get(arg2).getLat());
details.putExtra("lon", myArrayList.get(arg2).getLon());
details.putExtra("formatted_phone_number", detailsArrayList.get(arg2).getPhoneNumber());
startActivity(details);
}
}

try{
JSONObject jsonObject = new JSONObject(str);
if (jsonObject.has("results")) {
JSONArray jsonArray = jsonObject.getJSONArray("results");
for (int i = 0; i < jsonArray.length(); i++) {
//your logic here
}
}
} catch (JSONException e) {
e.printStackTrace();
}

Note that the getJSONArray() function throws an Exception if the mapping fails. For example I can't find a JSON Array which is called results.
The most important thing you have to do at first is:
change:
catch (Exception e) {
}
to
catch (Exception e) {
Log.e(YOUR_TAG, "Exception ..." , e);
}
Your try throws an Exception which you don't even Log. That might be the reason why you are confused.

JSON Get Value by Edittext

I'm trying to get JSON value by EditText.
At first I had a bunch of nullpointer exceptions, solved that. But now my function just isn't working. Been wrapping my brain over this...
I tried to create a EditText, get that value to a String, and get it over to the JSON Object. Don't know what I'm doing wrong... Or am I forgetting something?
public class MyActivity extends Activity {
TextView uid;
TextView name1;
TextView email1;
EditText edt;
Button Btngetdata;
//URL to get JSON Array
private static String url = "*";
//JSON Node Names
private static final String TAG_TAG = "tag";
private static final String TAG_ID = "id";
private static final String TAG_LAST_NAME = "last_name";
private static final String TAG_EMAIL = "country";
JSONArray user = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
Btngetdata = (Button)findViewById(R.id.getdata);
edt = (EditText)findViewById(R.id.edittext);
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();
uid = (TextView)findViewById(R.id.uid);
name1 = (TextView)findViewById(R.id.name);
email1 = (TextView)findViewById(R.id.email);
pDialog = new ProgressDialog(MyActivity.this);
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
pDialog.dismiss();
try {
// Getting JSON Array
user = json.getJSONArray(TAG_TAG);
JSONObject c = user.getJSONObject(0);
String xyz = edt.getText().toString();
// Storing JSON item in a Variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_LAST_NAME);
String email = c.getString(TAG_EMAIL);
//Set JSON Data in TextView
uid.setText(id);
name1.setText(name);
email1.setText(email);
edt.setText(xyz);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
{"tag":[{"id":"1","first_name":"Philip","last_name":"Porter","email":"pporter0#admin.ch","country":"China","ip_address":"26.83.255.206"},{"id":"2","first_name":"Nancy","last_name":"Martin","email":"nmartin1#google.ca","country":"Colombia","ip_address":"160.93.80.1"},{"id":"3","first_name":"Ann","last_name":"Peterson","email":"apeterson2#utexas.edu","country":"China","ip_address":"251.254.74.162"},{"id":"4","first_name":"Rachel","last_name":"Clark","email":"rclark3#mayoclinic.com","country":"Brazil","ip_address":"58.218.248.5"},{"id":"5","first_name":"Heather","last_name":"Burton","email":"hburton4#creativecommons.org","country":"Ethiopia","ip_address":"244.69.119.16"},{"id":"6","first_name":"Ruth","last_name":"Lane","email":"rlane5#va.gov","country":"Brazil","ip_address":"18.173.102.54"},{"id":"7","first_name":"Andrew","last_name":"Turner","email":"aturner6#devhub.com","country":"United States","ip_address":"13.119.240.234"},{"id":"8","first_name":"Wanda","last_name":"Medina","email":"wmedina7#pagesperso-orange.fr","country":"Netherlands","ip_address":"151.139.21.237"},{"id":"9","first_name":"Robert","last_name":"Elliott","email":"relliott8#joomla.org","country":"United States","ip_address":"34.200.249.109"},{"id":"10","first_name":"Kevin","last_name":"Harrison","email":"kharrison9#nih.gov","country":"Brazil","ip_address":"106.84.164.86"}]}
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
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;
}
}
EDIT
JSONObject c = user.getJSONObject(Integer.parseInt(xyz));
I Modified to this, im getting a response other than default 1 when base value was getJSONObject(0), but now im entering 1 and im getting 2, entering 4 getting 5..
Does anyone know how to solve this one?

If you are trying to parse the whole json array then use this.In you post execute
List<String> allid = new ArrayList<String>();
JSONArray obj= jsonResponse.getJSONArray("tag");
for (int i=0; i<obj.length(); i++) {
JSONObject actor = cast.getJSONObject(i);
String id= actor.getString("id");
allNames.add(id);
}
Then you can use a for loop to get the id in the list accordingly.
Otherwise you can do this parsing Using the Gson Library(you can download Gson library here
Just create a class in your package
public class DetailArray {
public boolean status;
public List<Detail_User> details;
public class Detail_User {
public String id;
public String first_name;
public String last_name;
public String email;
public String country;
}
}
In your post execute
Where response is the json response
DetailArray detail1 = (new Gson()).fromJson(response.toString(),
DetailArray.class);
Now Suppose , if you want to set the names in a list view then
//return a arraylist
private ArrayList<String> getName(DetailArray detail) {
ArrayList name = new ArrayList<String>();
for (int i=0;i< detail.details.size();i++) {
name.add(splitStr[i]);
}
return names;
}
Setting the array adapter and setting it to a list
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
this,
android.R.layout.simple_list_item_1,
getName(detail);
listview.setAdapter(arrayAdapter);

For a particular position try like this
int positionToShow = Integer.parseInt(edt.getText().toString()) - 1;
user = json.getJSONArray(TAG_TAG);
for(int i = 0; i < user.length(); i++) {
if(positionToShow == i) {
JSONObject c = user.getJSONObject(i);
// Storing JSON item in a Variable
String id = c.getString(TAG_ID);
String name = c.getString(TAG_LAST_NAME);
String email = c.getString(TAG_EMAIL);
uid.setText(id);
name1.setText(name);
email1.setText(email);
}
}

i've parse your json ...acc to number entered ..and it shows exact result....refer this....
final EditText no=(EditText)findViewById(R.id.editText1);
final Button click=(Button)findViewById(R.id.button1);
click.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View arg0)
{
try
{
Toast.makeText(MainActivity.this, no.getText().toString(), 0).show();
HttpClient client=new DefaultHttpClient();
HttpGet request=new HttpGet("http://192.168.0.30/test.js");
HttpResponse response=client.execute(request);
HttpEntity entity=response.getEntity();
String json=EntityUtils.toString(entity);
JSONObject j1=new JSONObject(json);
JSONArray ja1=j1.getJSONArray("tag");
JSONObject j2=ja1.getJSONObject(Integer.parseInt(no.getText().toString())-1);
Toast.makeText(MainActivity.this, j2.getString("first_name").toString() , 0).show();
entity.consumeContent();
}
catch(Exception e)
{
e.getStackTrace();
Toast.makeText(MainActivity.this, e.toString() , 0).show();
}
}
});

How to eliminate the empty strings inside the object in android json parsing

Hi friends i like to parse the json from url and also like to elimate the null values field and only show the object which has value if anyone known syntax for that means please guide me thanks in advance.
JSON Structure
{
"daftar_rs": [
{
"Name": "exe1",
"URL": "http://samir-mangroliya.blogspot.in/p/android-json-parsing-tutorial.html"
},
{
"Name": "exe2",
"URL": "https://code.google.com/p/json-io/"
},
{
"Name": "exe3",
"URL": ""
},
{
"Name": "exe4",
"URL": "http://stackoverflow.com/questions/10964203/android-removing-jsonobject"
},
{
"Name": "exe5",
"URL": ""
},
{
"Name": "exe6",
"URL": ""
}
],
"success": 1
}
MainActivity
public class MainActivity extends Activity {
ListView lv;
List<String> titleCollection = new ArrayList<String>();
List<String> urlCollection = new ArrayList<String>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.listView1);
// we will using AsyncTask during parsing
new AsyncTaskParseJson().execute();
lv.setOnItemClickListener(new OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
String linkUrl = urlCollection.get(arg2);
Intent webViewIntent = new Intent(MainActivity.this, WebViewActivity.class);
webViewIntent.putExtra("url", linkUrl);
startActivity(webViewIntent);
}
});
}
public void loadContents()
{
ArrayAdapter<String> adapter =new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_list_item_1,titleCollection);
lv.setAdapter(adapter);
}
// you can make this class as another java file so it will be separated from your main activity.
public class AsyncTaskParseJson extends AsyncTask<String, String, String> {
final String TAG = "AsyncTaskParseJson.java";
// set your json string url here
String yourJsonStringUrl = "http://192.168.1.167/vinandrophp/vinex.php";
// contacts JSONArray
JSONArray dataJsonArr = null;
#Override
protected void onPreExecute() {}
#Override
protected String doInBackground(String... arg0) {
try {
// instantiate our json parser
JsonParser jParser = new JsonParser();
// get json string from url
JSONObject json = jParser.getJSONFromUrl(yourJsonStringUrl);
// loop through all users
for (int i = 0; i < dataJsonArr.length(); i++) {
JSONObject c = dataJsonArr.getJSONObject(i);
// Storing each json item in variable
titleCollection.add(c.getString("Name"));
urlCollection.add(c.getString("URL"));
// show the values in our logcat
Log.e(TAG, "Name: " + titleCollection
+ ", URL: " + urlCollection);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String strFromDoInBg) {
loadContents();
}
}
}
JsonParser.java
public class JsonParser {
final String TAG = "JsonParser.java";
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
public JSONObject getJSONFromUrl(String url) {
// make HTTP request
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
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(TAG, "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e(TAG, "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}

Just check it inside your code.
String linkUrl = urlCollection.get(arg2);
if (linkUrl== null || linkUrl.equals("")){
// null
}
else{
// not null so put to extras and start intent
Intent webViewIntent = new Intent(MainActivity.this, WebViewActivity.class);
webViewIntent.putExtra("url", linkUrl);
startActivity(webViewIntent);
}

try below code
for (int i = 0; i < dataJsonArr.length(); i++)
{
JSONObject c = dataJsonArr.getJSONObject(i);
// Storing each json item in variable
String Name = c.getString("Name");
String Url = c.getString("URL")
if(!TextUtils.isEmpty(Name) && !TextUtil.isEmpty(Url))
{
titleCollection.add(Name);
urlCollection.add(Url));
}
// show the values in our logcat
Log.e(TAG, "Name: " + titleCollection + ", URL: " + urlCollection);
}

try below code:-
if(c.getString("URL").equals("") || c.isNULL("URL"))
{
// do nothing
}
else
{
titleCollection.add(c.getString("Name"));
urlCollection.add(c.getString("URL"));
}

Change for loop as
for (int i = 0; i < dataJsonArr.length(); i++) {
JSONObject c = dataJsonArr.getJSONObject(i);
// Storing each json item in variable
String name = c.getString("Name");
String url = c.getString("URL");
if(name != null && !(name.equals(""))
&& url != null && !(url.equals(""){
titleCollection.add(c.getString("Name"));
urlCollection.add(c.getString("URL"));
}
// show the values in our logcat
Log.e(TAG, "Name: " + titleCollection
+ ", URL: " + urlCollection);
}

Try replace keys and values with regular expression if the key is empty in the JsonParser class.
json=json.replaceAll("\\n",""); //you should do not have any new lines after commas
json=json.replaceAll(",\\W*\"\\w+\":\\W?(\"\"|null)","");

Android-Spinner Small issue

Spinner Feed Class
public class SpinnerFeed {
private String name;
private String id;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
Function to get records from a url
public String readFeed() {
StringBuilder builder = new StringBuilder();
HttpClient client = new DefaultHttpClient();
// domain intentionally obfuscated for security reasons
HttpGet httpGet = new HttpGet("statesURL");
try
{
HttpResponse response = client.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
} else {
Log.e(MainActivity.class.toString(), "Failed to download file");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
return builder.toString();
}
Finally my spinner code which is working,
String readFeed = readFeed();
// you can use this array to find the state ID based on name
ArrayList<SpinnerFeed> allStates = new ArrayList<SpinnerFeed>();
// you can use this array to populate your spinner
ArrayList<String> states_array = new ArrayList<String>();
try {
JSONObject json = new JSONObject(readFeed);
JSONArray jsonArray = new JSONArray(json.optString("states"));
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
SpinnerFeed statespinner = new SpinnerFeed();
statespinner.setName(jsonObject.optString("stateName"));
statespinner.setId(jsonObject.optString("stateID"));
allStates.add(statespinner);
states_array.add(jsonObject.optString("stateName"));
}
} catch (Exception e) {
e.printStackTrace();
}
Spinner spinner = (Spinner) findViewById(R.id.planets_spinner);
spinner.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, states_array));
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Object item = parent.getItemAtPosition(position);
int pos = parent.getSelectedItemPosition();
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
I just can figure out how to get the ID of selected Item
parent.getItemAtPosition(position); //gives me name
parent.getSelectedItemPosition(); //gives me position
Thanks In advance

in the on itemselected method
write the following:
SpinnerFeed statespinner = allstates.get(position);
String id = statespinner.getId(); // to get the id

Show data in listview with Asynctask

I success show my data from web service JSON in listview, but I want to add Asyntask.
Where I can put code Asyntask in my code.
This my code to show data in list view
public class Jadwal_remix extends ListActivity {
String v_date;
JSONArray r_js = null;
ArrayList<HashMap<String, String>> myArray = new ArrayList<HashMap<String,String>>();
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
String status ="";
String date = "";
String result = "";
String url = "http://10.0.2.2/remix/view_list.php";
JSONParser jParser = new JSONParser();
JSONObject json = jParser.AmbilJson(url);
try
{
r_js = json.getJSONArray("view_list");
for (int i =0; i < r_js.length(); i++)
{
String my_array = "";
JSONObject ar = r_js.getJSONObject(i);
status = ar.getString("st");
date = ar.getString("date");
result = ar.getString("result");
if (status.trim().equals("er"))
{
my_array += "Sorry "+result;
HashMap<String, String> map = new HashMap<String, String>();
map.put("result", my_array);
myArray.add(map);
}
else
{
my_array += "Date : "+date+" "+"Result : "+result;
HashMap<String, String> map = new HashMap<String, String>();
map.put("result", my_array);
myArray.add(map);
}
}
}
catch (JSONException e)
{
e.printStackTrace();
}
adapter_listview();
}
public void adapter_listview() {
ListAdapter adapter = new SimpleAdapter(this, jadwalRemix,R.layout.my_list,new String[] { "result"}, new int[] {R.id.txtResult});
setListAdapter(adapter);
}
}
And this JSONParser
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject AmbilJson(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
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;
}
}
Where can I put code for Asyntask?
Ok, I get sample code, and my code now like this
public class Jadwal_remix extends ListActivity {
String v_date;
JSONArray r_js = null;
ArrayList<HashMap<String, String>> myArray = new ArrayList<HashMap<String,String>>();
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
private class myProses extends AsyncTask<Void, Void, Void> {
ProgressDialog dialog;
protected void onPreExecute() {
dialog = ProgressDialog.show(Jadwal_remix.this, "", "Loading... Please wait", true);
}
protected Void doInBackground(Void... params) {
String status ="";
String date = "";
String result = "";
String url = "http://10.0.2.2/remix/view_list.php";
JSONParser jParser = new JSONParser();
JSONObject json = jParser.AmbilJson(url);
try
{
r_js = json.getJSONArray("view_list");
for (int i =0; i < r_js.length(); i++)
{
String my_array = "";
JSONObject ar = r_js.getJSONObject(i);
status = ar.getString("st");
date = ar.getString("date");
result = ar.getString("result");
if (status.trim().equals("er"))
{
my_array += "Sorry "+result;
HashMap<String, String> map = new HashMap<String, String>();
map.put("result", my_array);
myArray.add(map);
}
else
{
my_array += "Date : "+date+" "+"Result : "+result;
HashMap<String, String> map = new HashMap<String, String>();
map.put("result", my_array);
myArray.add(map);
}
}
}
catch (JSONException e)
{
e.printStackTrace();
}
return null;
protected void onPostExecute(Void unused) {
adapter_listview();
dialog.dismiss();
}
}
public void adapter_listview() {
ListAdapter adapter = new SimpleAdapter(this, jadwalRemix,R.layout.my_list,new String[] { "result"}, new int[] {R.id.txtResult});
setListAdapter(adapter);
}
}
I'm get problem when server is die, it still loading.
How I can show message ex: can't connect to server?

Working ASyncTask tutorial,
Full ASyncTask Eclipse Project,
and here's some code that I think, when mixed with the above sample, will get you the result with the list that you desire (you'll have to adapt it to your needs a bit, though (pay attention to the list stuff, even though this is from a custom Dialog:
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Kies Facebook-account");
builder.setNegativeButton("Cancel", this);
LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View dialogLayout = inflater.inflate(R.layout.dialog, null);
builder.setView(dialogLayout);
final String[] items = {"Red", "Green", "Blue" };
builder.setAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Log.v("touched: ", items[which].toString());
}}
);
return builder.create();
}

This is my code please try this one,
MAinActivity.java
public class MyActivity extends Activity {
private ListView contests_listView;
private ProgressBar pgb;
ActivitiesBean bean;
ArrayList<Object> listActivities;
ActivityAdapter adapter;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_listview);
contests_listView = (ListView) findViewById(R.id.activity_listView);
pgb = (ProgressBar) findViewById(R.id.contests_progressBar);
listActivities = new ArrayList<Object>();
new FetchActivitesTask().execute();
}
public class FetchActivitesTask extends AsyncTask<Void, Void, Void> {
int i =0;
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pgb.setVisibility(View.VISIBLE);
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
String url = "Your URL Here";
String strResponse = util.makeWebCall(url);
try {
JSONObject objResponse = new JSONObject(strResponse);
JSONArray jsonnodes = objResponse.getJSONArray(nodes);
for (i = 0; i < jsonnodes.length(); i++)
{
String str = Integer.toString(i);
Log.i("Value of i",str);
JSONObject jsonnode = jsonnodes.getJSONObject(i);
JSONObject jsonnodevalue = jsonnode.getJSONObject(node);
bean = new ActivitiesBean();
bean.title = jsonnodevalue.getString(title);
bean.image = jsonnodevalue.getString(field_activity_image_fid);
listActivities.add(bean);
}
}
catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
public void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
pgb.setVisibility(View.GONE);
displayAdapter();
}
}
public void displayAdapter()
{
adapter = new ActivityAdapter(this, listActivities);
contests_listView.setAdapter(adapter);
contests_listView.setOnItemClickListener(new OnItemClickListener() {
//#Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long id) {
// your onclick Activity
}
});
}
}
util.class
public static String makeWebCall(String url) {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet httpRequest = new HttpGet(url);
// HttpPost post = new HttpPost(url);
try {
HttpResponse httpResponse = client.execute(httpRequest);
final int statusCode = httpResponse.getStatusLine().getStatusCode();
if (statusCode != HttpStatus.SC_OK) {
return null;
}
HttpEntity entity = httpResponse.getEntity();
InputStream instream = null;
if (entity != null) {
instream = entity.getContent();
}
return iStream_to_String(instream);
}
catch (IOException e) {
httpRequest.abort();
// Log.w(getClass().getSimpleName(), "Error for URL =>" + url, e);
}
return null;
}
public static String iStream_to_String(InputStream is1) {
BufferedReader rd = new BufferedReader(new InputStreamReader(is1), 4096);
String line;
StringBuilder sb = new StringBuilder();
try {
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String contentOfMyInputStream = sb.toString();
return contentOfMyInputStream;
}
}
ActivityBean.java
public class ActivitiesBean implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
public String title;
public String image;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}

Develop Reference

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