Develop Reference

Empty Activity When I try to load JSON from S3

When I navigate to the activity that should load a ListView from a JSON hosted on AWS S3, I get nothing but a blank activity. There's no error message, no errors in the debugger, and Logcat doesn't seem to hold any relevant information.
Here's LoadJSONTask.java:
package com.teamplum.projectapple;
import android.os.AsyncTask;
import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;
import com.teamplum.projectapple.NewsDO;
import com.teamplum.projectapple.Response;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
public class LoadJSONTask extends AsyncTask<String, Void, Response> {
public LoadJSONTask(Listener listener) {
mListener = listener;
}
public interface Listener {
void onLoaded(List<NewsDO> androidList);
void onError();
}
private Listener mListener;
#Override
protected Response doInBackground(String... strings) {
try {
String stringResponse = loadJSON(strings[0]);
Gson gson = new Gson();
return gson.fromJson(stringResponse, Response.class);
} catch (IOException e) {
e.printStackTrace();
return null;
} catch (JsonSyntaxException e) {
e.printStackTrace();
return null;
}
}
#Override
protected void onPostExecute(Response response) {
if (response != null) {
mListener.onLoaded(response.getAndroid());
} else {
mListener.onError();
}
}
private String loadJSON(String jsonURL) throws IOException {
URL url = new URL(jsonURL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
StringBuilder response = new StringBuilder();
while ((line = in.readLine()) != null) {
response.append(line);
}
in.close();
return response.toString();
}
}
and here's MainActivity.java:
package com.teamplum.projectapple;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
//import com.teamplum.projectapple.NewsDO;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class MainActivity extends AppCompatActivity implements LoadJSONTask.Listener, AdapterView.OnItemClickListener {
private ListView mListView;
public static final String URL = "https://s3-eu-west-1.amazonaws.com/tyi-work/Work_Experience.json";
private List<HashMap<String, String>> mAndroidMapList = new ArrayList<>();
private static final String KEY_TIT = "title";
private static final String KEY_CAT = "category";
private static final String KEY_DES = "description";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = findViewById(R.id.list_view);
mListView.setOnItemClickListener(this);
new LoadJSONTask(this).execute(URL);
}
#Override
public void onLoaded(List<NewsDO> androidList) {
for (NewsDO work : androidList) {
HashMap<String, String> map = new HashMap<>();
map.put(KEY_TIT, work.getTitle());
map.put(KEY_CAT, work.getCategory());
map.put(KEY_DES, work.getDescription());
mAndroidMapList.add(map);
}
loadListView();
}
#Override
public void onError() {
Toast.makeText(this, "Error !", Toast.LENGTH_SHORT).show();
}
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(this, mAndroidMapList.get(i).get(KEY_TIT),Toast.LENGTH_LONG).show();
}
private void loadListView() {
ListAdapter adapter = new SimpleAdapter(MainActivity.this, mAndroidMapList, R.layout.list_item,
new String[] { KEY_CAT, KEY_TIT, KEY_DES },
new int[] { R.id.version,R.id.name, R.id.api });
mListView.setAdapter(adapter);
}
}
I used this tutorial to help make this, if you need any extra information please feel free to ask, thank you.

I have tested the async task for the URL connection and its working fine.
The problem is either on the parsing or on the activity side. Have you tried putting breakpoints and follow the data?

Getting json response in log.d but not inside app (code included)

I am trying to use the ProductHunt API to display a list of new posts in a ListView and further expand the list item on click.
On opening the app, the Progress bar appears but after that the app screen stays blank. I think there might be some error in my OnPostExecute method, because when I added a textview to display a string, its getting displayed but my listView is not getting displayed.
I used the standard Apache HttpClient for handling api requests.
I have 4 classes,
MainActivity.java
package com.emoji.apisoup;
/**
* Created by mdhalim on 16/05/16.
*/
import java.io.IOException;
import java.util.ArrayList;
import org.json.JSONArray;
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.widget.AdapterView;
import android.widget.ListView;
import org.apache.http.HttpClientConnection;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicHttpResponse;
import org.apache.http.protocol.HTTP;
public class MainActivity extends Activity {
private ListView lvPosts;
private ProductHuntAdapter adapterPosts;
public static final String POST_DETAIL_KEY = "posts";
private ProgressDialog pDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.phunt_main);
String serverURL = "https://api.producthunt.com/v1/posts/";
ArrayList<ProductHuntList> aPosts = new ArrayList<ProductHuntList>();
adapterPosts = new ProductHuntAdapter(MainActivity.this, aPosts);
lvPosts = (ListView) findViewById(R.id.lvPosts);
lvPosts.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
{
Intent i = new Intent(MainActivity.this, ProductHuntDetail.class);
i.putExtra(POST_DETAIL_KEY, adapterPosts.getItem(position));
startActivity(i);
}
}
});
new LongOperation().execute(serverURL);
}
private class LongOperation extends AsyncTask<String, Void, Void> {
private final HttpClient Content = new DefaultHttpClient();
private String Error = null;
#Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
protected Void doInBackground(String... urls){
JSONArray items = null;
try {
HttpGet httpget = new HttpGet(urls[0]);
httpget.setHeader("Accept","application/json");
httpget.setHeader("Content-Type","application/json");
httpget.setHeader("Authorization","Bearer 2587aa878d7334e3c89794a6b73ebffb59a06c23b82cd0f789d2ab72d2417739");
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String jsonStr = Content.execute(httpget, responseHandler);
Log.d("Response: ", "> " + jsonStr);
JSONObject jsonObj = new JSONObject(jsonStr);
items = jsonObj.getJSONArray("posts");
// Parse json array into array of model objects
ArrayList<ProductHuntList> posts = ProductHuntList.fromJson(items);
// Load model objects into the adapter
for (ProductHuntList post : posts) {
adapterPosts.add(post);
}
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
Error = e.getMessage();
cancel(true);
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
ArrayList<ProductHuntList> aPosts = new ArrayList<ProductHuntList>();
adapterPosts = new ProductHuntAdapter(MainActivity.this, aPosts);
lvPosts.setAdapter(adapterPosts);
}
}
}
ProductHuntList.java containing the JSON Data model and deserializer and a static method for parsing an array of JSON
package com.emoji.apisoup;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.io.Serializable;
/**
* Created by mdhalim on 18/05/16.
*/
public class ProductHuntList implements Serializable {
private static final long serialVersionUID = -8959832007991513854L;
private String name;
private String tagline;
private String screenshot_url;
private String largePosterUrl;
private String discussion_Url;
private String created_at;
private int votes_count;
public String getNames() {
return name;
}
public String getCreated_at() {
return created_at;
}
public String getScreenshot_url() {
return screenshot_url;
}
public String getDiscussion_Url() {
return discussion_Url;
}
public int getVotes_count() {
return votes_count;
}
public String getLargePosterUrl() {
return largePosterUrl;
}
public String getTagline(){
return tagline;
}
public static ProductHuntList fromJson(JSONObject jsonObject) {
ProductHuntList b = new ProductHuntList();
try {
// Deserialize json into object fields
b.name = jsonObject.getString("name");
b.created_at = jsonObject.getString("created_at");
b.tagline = jsonObject.getString("tagline");
b.screenshot_url = jsonObject.getJSONObject("screenshot_url").getString("300px");
b.largePosterUrl = jsonObject.getJSONObject("screenshot_url").getString("850px");
b.votes_count = jsonObject.getInt("votes_count");
b.discussion_Url = jsonObject.getString("discussion_url");
} catch (JSONException e) {
e.printStackTrace();
return null;
}
// Return new object
return b;
}
public static ArrayList<ProductHuntList> fromJson(JSONArray jsonArray) {
ArrayList<ProductHuntList> posts = new ArrayList<ProductHuntList>(jsonArray.length());
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject productJson = null;
try {
productJson = jsonArray.getJSONObject(i);
} catch (Exception e) {
e.printStackTrace();
continue;
}
ProductHuntList post = ProductHuntList.fromJson(productJson);
if (post != null)
{
posts.add(post);
}
}
return posts;
}
}
ProductHuntAdapter.java this implements the ArrayAdapter
package com.emoji.apisoup;
/**
* Created by mdhalim on 18/05/16.
*/
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
/**
* Created by mdhalim on 18/05/16.
*/
public class ProductHuntAdapter extends ArrayAdapter<ProductHuntList> {
public ProductHuntAdapter(Context context, ArrayList<ProductHuntList> aPosts) {
super(context, 0, aPosts);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// Get the data item for this position
ProductHuntList posts = getItem(position);
// Check if an existing view is being reused, otherwise inflate the view
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.item_product_hunt, null);
}
// Lookup view for data population
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView created = (TextView) convertView.findViewById(R.id.created);
TextView tagline = (TextView) convertView.findViewById(R.id.tagline);
ImageView ivPosterImage = (ImageView) convertView.findViewById(R.id.ivPosterImage);
// Populate the data into the template view using the data object
name.setText(posts.getNames());
created.setText("Created On: " + posts.getCreated_at() + "%");
tagline.setText(posts.getTagline());
Picasso.with(getContext()).load(posts.getScreenshot_url()).into(ivPosterImage);
// Return the completed view to render on screen
return convertView;
}
}
and finally, a class implementing the activity for Item Details when a user clicks on any item on the list.
ProductHuntDetail
package com.emoji.apisoup;
/**
* Created by mdhalim on 18/05/16.
*/
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.text.Html;
import android.widget.ImageView;
import android.widget.TextView;
import com.squareup.picasso.Picasso;
public class ProductHuntDetail extends Activity {
private ImageView ivPosterImage;
private TextView name;
private TextView discusUrl;
private TextView upvotes;
private TextView tagline;
private TextView created;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.product_hunt_detail);
// Fetch views
ivPosterImage = (ImageView) findViewById(R.id.ivPosterImage);
name = (TextView) findViewById(R.id.name);
discusUrl = (TextView) findViewById(R.id.discusUrl);
created = (TextView) findViewById(R.id.created);
upvotes = (TextView) findViewById(R.id.upvotes);
tagline = (TextView) findViewById(R.id.tagline);
// Load movie data
ProductHuntList posts = (ProductHuntList) getIntent().getSerializableExtra(MainActivity.POST_DETAIL_KEY);
loadMovie(posts);
}
// Populate the data for the movie
#SuppressLint("NewApi")
public void loadMovie(ProductHuntList posts) {
// Populate data
name.setText(posts.getNames());
upvotes.setText(Html.fromHtml("<b>Upvotes:</b> " + posts.getVotes_count() + "%"));
created.setText(posts.getCreated_at());
tagline.setText(posts.getTagline());
discusUrl.setText(Html.fromHtml("<b>Discussion Url:</b> " + posts.getDiscussion_Url()));
// R.drawable.large_movie_poster from
// http://content8.flixster.com/movie/11/15/86/11158674_pro.jpg -->
Picasso.with(this).load(posts.getLargePosterUrl()).
placeholder(R.drawable.large_movie_poster).
into(ivPosterImage);
}
}
I have been trying to debug this for hours :/

Your Async task is returning a void.
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
ArrayList<ProductHuntList> aPosts = new ArrayList<ProductHuntList>();
adapterPosts = new ProductHuntAdapter(MainActivity.this, aPosts);
lvPosts.setAdapter(adapterPosts);
}
As far as I can tell from the code, aPosts is empty.
I think your Async task should be -
AsyncTask<String, Void, ProductHuntAdapter>
and remove -
adapterPosts = new ProductHuntAdapter(MainActivity.this, aPosts);
You are creating and updating this in your doInBackground() method already.

I got it!
I didnt need to declare these lines again in my onPostExecute() method
ArrayList<ProductHuntList> aPosts = new ArrayList<ProductHuntList>();
adapterPosts = new ProductHuntAdapter(MainActivity.this, aPosts);
So bascially, my new onPostExecute() method goes like this
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
lvPosts.setAdapter(adapterPosts);
}
I had been trying to find this error for last 2 hours, it was harder since, I wasn't even getting any errors. As soon as I posted it on StackOverFlow, seems like I had a divine intervention.

JSONParser can't request to server

I have a case where my second server I get different results when a request to the API with jsonparser. Always fail..
Server 1 | Server 2
On both servers (server 1 and 2) I made an example of exactly the same data, but when I make the request on the application turns on the first server to respond well, but the second server always responds with a null. How do I use the second server in order to run properly? I am very confused on this case..
I made ​​a simple application to perform experiments in case above :
package com.joris.androidjsonparsingfromurl;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView uid;
TextView name1;
TextView email1;
Button Btngetdata;
// URL to get JSON Array
//private static String url = "http://newapi.bacaberita.com/statis.php";
private static String url = "http://api.berthojoris.com/babe/statis.php";
// JSON Node Names
private static final String TAG_ITEM = "items";
private static final String TAG_ISDISPLAY = "IsDisplay";
private static final String TAG_TITLE = "Title";
private static final String TAG_POST = "Post";
JSONArray user = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Utils.setPolicyThread();
Btngetdata = (Button) findViewById(R.id.getdata);
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(MainActivity.this);
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.setCanceledOnTouchOutside(false);
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 result) {
super.onPostExecute(result);
if (result.length() > 0) {
pDialog.dismiss();
try {
// Getting JSON Array
user = result.getJSONArray(TAG_ITEM);
JSONObject c = user.getJSONObject(0);
// Storing JSON item in a Variable
String status = c.getString(TAG_ISDISPLAY);
String title = c.getString(TAG_TITLE);
String post = c.getString(TAG_POST);
// Set JSON Data in TextView
uid.setText(status);
name1.setText(title);
email1.setText(post);
Log.e("HASILNYA", status+title+post);
} catch (JSONException e) {
e.printStackTrace();
}
}else{
pDialog.dismiss();
Toast.makeText(getBaseContext(),
"Data Kosong Gan...", Toast.LENGTH_SHORT)
.show();
}
}
}
#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;
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage(R.string.really_quit)
.setPositiveButton(R.string.yes,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog,
int which) {
finish();
}
}).setNegativeButton(R.string.no, null).show();
return true;
} else {
return super.onKeyDown(keyCode, event);
}
}
}
Is there a difference cause I can not make a request to the second server? Please help.. Thanks

Asyntask in JSON Parsing

This is my sample code, where I make a json parsing class to parse data from a given link.
package com.billosuch.listviewblogpost;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
public class ListViewBlogPost extends Activity {
// url to make request
private static String url = "http://api.androidhive.info/contacts/";
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<SearchResults> searchResultss = new ArrayList<SearchResults>();
final ListView lv1 = (ListView) findViewById(R.id.ListView01);
JSONParser jparser = new JSONParser();
JSONObject json = jparser.getJSONFromUrl(url);
// looping through All Contacts
Log.d("*********oSR", "B4 TRy");
try {
contacts = json.getJSONArray(TAG_CONTACTS);
for (int i = 0; i < contacts.length(); i++) {
SearchResults oSR = new SearchResults();
JSONObject c = contacts.getJSONObject(i);
oSR.setId(c.getString(TAG_ID));
oSR.setName(c.getString(TAG_NAME));
oSR.setEmail(c.getString(TAG_EMAIL));
oSR.setAddress(c.getString(TAG_ADDRESS));
oSR.setGender(c.getString(TAG_GENDER));
JSONObject phone = c.getJSONObject(TAG_PHONE);
oSR.setPhone_mobile(phone.getString(TAG_PHONE_MOBILE));
oSR.setPhone_home(phone.getString(TAG_PHONE_HOME));
oSR.setPhone_office(phone.getString(TAG_PHONE_OFFICE));
searchResultss.add(oSR);
Log.d("*********oSR", oSR.getName());
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.d("*********oSR", "AFTER TRy");
lv1.setAdapter(new MyCustomBaseAdapter(this, searchResultss));
}
}
This code showing me warning to do this in Asyntask. I want it to be supported on ICS and JellyBean.
Skipped 391 frames! The application may be doing too much work on its main thread.

You should use a asynctask for this purpose and move the network related code to doinBackground()
http://developer.android.com/reference/android/os/AsyncTask.html.
Load your asynctask on the UI thread as
new TheTask().execute()
Asynctask Class.
class TheTask extends AsyncTask<Void,Void,Void>
{
protected void onPreExecute()
{ super.onPreExecute();
//display progressdialog.
}
protected void doInBackground(Void ...params)
{
//Network related opearaiton. Do not update ui here
return null;
}
protected void onPostExecute(Void result)
{
super.onPostExecute(result);
//dismiss progressdialog.
//update ui
}
}
You can pass the URL to the conbstructor of the asynctask or directly to doInbackground()

You are currently making a server request in the UI thread. While the app waits for the server response, your UI freezes and that's a bad user experience. Use an AsyncTask in order to load your data in another thread and update the UI when you get the server response.
here is an example

Change your code like below
package com.billosuch.listviewblogpost;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
public class ListViewBlogPost extends Activity {
// url to make request
private static String url = "http://api.androidhive.info/contacts/";
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
final ListView lv1;
ArrayList<SearchResults> searchResultss;
// contacts JSONArray
JSONArray contacts = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
searchResultss = new ArrayList<SearchResults>();
lv1 = (ListView) findViewById(R.id.ListView01);
new MyAsync(Youractivity.this).execute();
}
public class MyAsync extends AsyncTask<Void, Integer, Void> {
public MyAsync(Activity activity) {
this.activity = activity;
context = activity;
dialog = new ProgressDialog(context);
}
/** progress dialog to show user that the backup is processing. */
private ProgressDialog dialog;
/** application context. */
private Activity activity;
private Context context;
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
JSONParser jparser = new JSONParser();
JSONObject json = jparser.getJSONFromUrl(url);
// looping through All Contacts
Log.d("*********oSR", "B4 TRy");
try {
contacts = json.getJSONArray(TAG_CONTACTS);
for (int i = 0; i < contacts.length(); i++) {
SearchResults oSR = new SearchResults();
JSONObject c = contacts.getJSONObject(i);
oSR.setId(c.getString(TAG_ID));
oSR.setName(c.getString(TAG_NAME));
oSR.setEmail(c.getString(TAG_EMAIL));
oSR.setAddress(c.getString(TAG_ADDRESS));
oSR.setGender(c.getString(TAG_GENDER));
JSONObject phone = c.getJSONObject(TAG_PHONE);
oSR.setPhone_mobile(phone.getString(TAG_PHONE_MOBILE));
oSR.setPhone_home(phone.getString(TAG_PHONE_HOME));
oSR.setPhone_office(phone.getString(TAG_PHONE_OFFICE));
searchResultss.add(oSR);
Log.d("*********oSR", oSR.getName());
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.d("*********oSR", "AFTER TRy");
return null;
}
#Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
lv1.setAdapter(new MyCustomBaseAdapter(this, searchResultss));
}
}
}

Make LongOperation class like this.
private class LongOperation extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
JSONParser jparser = new JSONParser();
JSONObject json = jparser.getJSONFromUrl(url);
// looping through All Contacts
Log.d("*********oSR", "B4 TRy");
try {
contacts = json.getJSONArray(TAG_CONTACTS);
for (int i = 0; i < contacts.length(); i++) {
SearchResults oSR = new SearchResults();
JSONObject c = contacts.getJSONObject(i);
oSR.setId(c.getString(TAG_ID));
oSR.setName(c.getString(TAG_NAME));
oSR.setEmail(c.getString(TAG_EMAIL));
oSR.setAddress(c.getString(TAG_ADDRESS));
oSR.setGender(c.getString(TAG_GENDER));
JSONObject phone = c.getJSONObject(TAG_PHONE);
oSR.setPhone_mobile(phone.getString(TAG_PHONE_MOBILE));
oSR.setPhone_home(phone.getString(TAG_PHONE_HOME));
oSR.setPhone_office(phone.getString(TAG_PHONE_OFFICE));
searchResultss.add(oSR);
Log.d("*********oSR", oSR.getName());
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
lv1.setAdapter(new MyCustomBaseAdapter(this, searchResultss));
//might want to change "executed" for the returned string passed into onPostExecute() but that is upto you
}
#Override
protected void onPreExecute() {
}
#Override
protected void onProgressUpdate(Void... values) {
}
}

You can use async task like this...
package com.billosuch.listviewblogpost;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
public class ListViewBlogPost extends Activity {
// url to make request
private static String url = "http://api.androidhive.info/contacts/";
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<SearchResults> searchResultss = new ArrayList<SearchResults>();
final ListView lv1 = (ListView) findViewById(R.id.ListView01);
new MyTask().execute(url);
class MyTask extends AsyncTask<String, Void, String> {
ProgressDialog pDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SocialActivity.this);
pDialog.setMessage("Loading...");
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... params) {
JSONParser jparser = new JSONParser();
JSONObject json = jparser.getJSONFromUrl(params[0]);
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (null != pDialog && pDialog.isShowing()) {
pDialog.dismiss();
}
if (null == result || result.length() == 0) {
showToast("No data found from web!!!");
YourActivity.this.finish();
} else {
try {
contacts = json.getJSONArray(TAG_CONTACTS);
for (int i = 0; i < contacts.length(); i++) {
SearchResults oSR = new SearchResults();
JSONObject c = contacts.getJSONObject(i);
oSR.setId(c.getString(TAG_ID));
oSR.setName(c.getString(TAG_NAME));
oSR.setEmail(c.getString(TAG_EMAIL));
oSR.setAddress(c.getString(TAG_ADDRESS));
oSR.setGender(c.getString(TAG_GENDER));
JSONObject phone = c.getJSONObject(TAG_PHONE);
oSR.setPhone_mobile(phone.getString(TAG_PHONE_MOBILE));
oSR.setPhone_home(phone.getString(TAG_PHONE_HOME));
oSR.setPhone_office(phone.getString(TAG_PHONE_OFFICE));
searchResultss.add(oSR);
Log.d("*********oSR", oSR.getName());
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.d("*********oSR", "AFTER TRy");
lv1.setAdapter(new MyCustomBaseAdapter(this, searchResultss));
}
}

android linkify in listview

I have this code:
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 com.romantic.aacplay.R;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
// import android.text.Html;
// import android.text.Html;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.SimpleAdapter;
public class PodCast extends ListActivity {
private ProgressDialog pDialog;
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> productsList;
private static String url_all_products = "http://mysite.net/andro/pcast.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "podcast";
private static final String TAG_LINK = "link";
private static final String TAG_NAME = "nume";
JSONArray products = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.poadcast);
GradientDrawable gd = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, new int[] {Color.RED,Color.BLACK});
View title = getWindow().findViewById(android.R.id.title);
View titleBar = (View) title.getParent();
titleBar.setBackgroundDrawable(gd);
productsList = new ArrayList<HashMap<String, String>>();
new LoadAllProducts().execute();
}
class LoadAllProducts extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(PodCast.this);
pDialog.setMessage("Se incarca. Asteapta...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
Log.d("Ultimele 10 piese: ", json.toString());
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
products = json.getJSONArray(TAG_PRODUCTS);
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
String link = c.getString(TAG_LINK);
String name = c.getString(TAG_NAME);
HashMap<String, String> map = new HashMap<String, String>();
// String href = String.format(" %s ", link, name);
// String cici = Html.fromHtml(href).toString();
map.put(TAG_NAME, name);
map.put(TAG_LINK, "" + Html.fromHtml(link));
// map.put(TAG_LINK, link);
productsList.add(map);
}
} else {
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
runOnUiThread(new Runnable() {
public void run() {
ListAdapter adapter = new SimpleAdapter(
PodCast.this, productsList,
R.layout.list_item, new String[] {
TAG_NAME, TAG_LINK },
new int[] { R.id.link, R.id.name });
setListAdapter(adapter);
}
});
}
}
}
Now i'm trying to figure out how can i make the links in listview clickable. I`m trying to linkify a textview that is in found here:
protected void onPostExecute(String file_url) {
pDialog.dismiss();
runOnUiThread(new Runnable() {
public void run() {
ListAdapter adapter = new SimpleAdapter(
PodCast.this, productsList,
R.layout.list_item, new String[] {
TAG_NAME, TAG_LINK },
new int[] { R.id.link, R.id.name });
setListAdapter(adapter);
}
});
}
R.layout.list_item which is a different .xml layout for the listview.
So can you guys help me solve this? Thanks in advance!

I feel instead of using SimpleAdapter,Please extend the BaseAdapter and make the textview you are using as linkify.so it will automatically get click.
please refer:
Android dev blog

put this line to ur textview
android:autoLink="web"
i hope this will solve ur query

I wanted as well to create a linkeable textView on my list adapter so I used:
Linkify.addLinks(textViewLocationPhone, Linkify.PHONE_NUMBERS);
textViewLocationPhone.setLinksClickable(true);
and it worked.