Develop Reference

Android Can't change imageview [duplicate]

This question already has answers here:
CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch views
(6 answers)
Closed 5 years ago.
I have code that gets an image by its name from drawables, but for some reason it can't update it.
package com.infonuascape.osrshelper.fragments;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.drawable.Drawable;
import android.media.Image;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.toolbox.ImageLoader;
import com.infonuascape.osrshelper.R;
import com.infonuascape.osrshelper.activities.MainActivity;
import com.infonuascape.osrshelper.models.Account;
import org.json.JSONException;
import org.json.JSONObject;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
public class BankViewFragment extends OSRSFragment {
private static final String TAG = "BankViewFragment";
private static Account account;
private ListView lv;
private ImageView iv;
Handler handler;
ArrayList<HashMap<String, String>> ItemList;
public static BankViewFragment newInstance(final Account account) {
BankViewFragment fragment = new BankViewFragment();
Bundle b = new Bundle();
fragment.setArguments(b);
return fragment;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.bank_view, null);
ItemList = new ArrayList<>();
new GetItems().execute();
lv = (ListView) view.findViewById(R.id.list);
handler = new Handler(Looper.getMainLooper());
SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
String nikas = sharedPref.getString("bankname", "null");
return view;
}
public static int getResId(String resourceName, Class<?> c) {
try {
Field idField = c.getDeclaredField(resourceName);
return idField.getInt(idField);
} catch (Exception e) {
throw new RuntimeException("No resource ID found for: "
+ resourceName + " / " + c, e);
}
}
private class GetItems extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
SharedPreferences sharedpreferences = getContext().getSharedPreferences("minescape", Context.MODE_PRIVATE);
String nikas = sharedpreferences.getString("bankname", "null");
String url = "https://api.minesca.pe/game/classic/stats?username=" + nikas;
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "NIKAS: " + nikas);
Log.e(TAG, "ACCOUNT: " + account);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONObject items = jsonObj.getJSONObject("bank");
Iterator keys = items.keys();
while(keys.hasNext()) {
String dynamicKey = (String)keys.next();
JSONObject line = items.getJSONObject(dynamicKey);
String item = line.getString("item");
//Integer image = getResId(item, Drawable.class);
final Integer image = getResources().getIdentifier(item, "drawable", getActivity().getPackageName());
String amount = line.getString("amount");
Log.e(TAG, "DAIKTAS: " + item);
Log.e(TAG, "KIEKIS: " + amount);
HashMap<String, String> contact = new HashMap<>();
String itembank = item.replaceAll("i_", "");
String itembanks = itembank.replaceAll("_", " ");
contact.put("name", itembanks);
contact.put("email", amount);
LayoutInflater inflater = LayoutInflater.from(getContext());
View view = inflater.inflate(R.layout.bank_view, null);
lv = (ListView) view.findViewById(R.id.list);
// iv = (ImageView) view.findViewById(R.id.logo);
final ImageView ims = (ImageView) lv.findViewById(R.id.logo);
handler.post(new Runnable() {
public void run() {
if(image != null) {
Log.e(TAG, "kas cia jam netinka?: " + image);
if(image == 0) {
ims.setImageResource(R.drawable.i_noted);
Log.e(TAG, "kas cia jam netinka?: " + image);
} else {
Log.e(TAG, "kas cia jam netinka?: " + image);
ims.setImageResource(image);
}
} else {
Log.e(TAG, "null?: " + image);
}
}
});
ItemList.add(contact);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
new Runnable() {
#Override
public void run() {
Toast.makeText(getContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
};
}
} else {
Log.e(TAG, "Couldn't get json from server.");
new Runnable() {
#Override
public void run() {
Toast.makeText(getContext(),
"Couldn't get json from server!",
Toast.LENGTH_LONG).show();
}
};
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
ListAdapter adapter = new SimpleAdapter(getContext(), ItemList,
R.layout.list_item, new String[]{ "email","name"},
new int[]{R.id.email, R.id.name});
lv.setAdapter(adapter);
}
}
}
Error:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.infonuascape.osrshelper, PID: 31024
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageResource(int)' on a null object reference
at com.infonuascape.osrshelper.fragments.BankViewFragment$GetItems$1.run(BankViewFragment.java:128)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:194)
at android.app.ActivityThread.main(ActivityThread.java:5637)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)
The problem is that there's a lot of items, and most of them have the resources, but some don't and i would like to just skip those who don't have, but the main problem is that the app crashes while trying to see the bank.

You can't change Views in a non UI thread.
So in order to fix your problem just access UI related stuff in the UI thread, e.g. in onPostExecute()

Do not do this : View should not be touched in another thread except UI thread.
#Override
protected void onPostExecute(Void result) {
-->>>>> DONOT DO THIS --->>>>>lv.setAdapter(adapter);
}

Accessing the searchview query text from mainactivity

I am planning to make a news app. I have created a simple search view inside the action bar of my app.
This is the Main activity
package com.example.hp.simplenews;
import android.app.Activity;
import android.app.LoaderManager;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.content.Loader;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SearchView;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<List<News>> {
private int Newsloaderid = 1;
private Newsadapter newslistadapter;
private String search_query_input = "";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView newslistview = findViewById(R.id.list);
newslistadapter = new Newsadapter(this, new ArrayList<News>());
newslistview.setAdapter(newslistadapter);
LoaderManager loaderManager = getLoaderManager();
loaderManager.initLoader(Newsloaderid, null, MainActivity.this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the options menu from XML
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.options_menu, menu);
// Get the SearchView and set the searchable configuration
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
// Assumes current activity is the searchable activity
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
searchView.setIconifiedByDefault(false); // Do not iconify the widget; expand it by default
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String newtext) {
search_query_input = newtext;
return true;
}
#Override
public boolean onQueryTextChange(String query) {
return true;
}
});
return true;
}
#Override
public Loader<List<News>> onCreateLoader(int i, Bundle bundle) {
return new NewsLoader(this, search_query_input);
}
#Override
public void onLoadFinished(Loader<List<News>> loader, List<News> news) {
newslistadapter.clear();
if (news != null && !news.isEmpty()) {
newslistadapter.addAll(news);
}
}
#Override
public void onLoaderReset(Loader loader) {
newslistadapter.clear();
}
}
The SearchResultsActivity handles the HTTP request and JSON parsing.
This is the SearchResultsActivity
package com.example.hp.simplenews;
import android.app.Activity;
import android.app.LoaderManager;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.content.Loader;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.text.TextUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
public class SearchResultsActivity extends Activity{
String query_string = "";
private static final String LOG_TAG = SearchResultsActivity.class.getName();
public static URL createUrl(String query_url) throws MalformedURLException {
URL url = null;
String APIKey = "apiKey";
String query = "q";
try {
final String base_url = "https://newsapi.org/v2/everything?";
Uri final_url = Uri.parse(base_url).buildUpon()
.appendQueryParameter(query, query_url)
.appendQueryParameter(APIKey, "48f67c1e66994aa8a92f92a48b5f6581")
.build();
url = new URL(final_url.toString());
Log.i(LOG_TAG, "THE FINAL URL IS" + final_url);
} catch (MalformedURLException e) {
e.printStackTrace();
Log.e(LOG_TAG, "the url couldn't be made");
}
return url;
}
private static final String HTTPREQUEST(URL url) throws IOException {
String jsonresponse = "";
if (jsonresponse == null) {
return null;
}
HttpURLConnection httpURLConnection = null;
InputStream inputStream = null;
try {
httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("GET");
httpURLConnection.setReadTimeout(10000);
httpURLConnection.setConnectTimeout(150000);
httpURLConnection.connect();
if (httpURLConnection.getResponseCode() == 200) {
inputStream = httpURLConnection.getInputStream();
jsonresponse = readfromstream(inputStream);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (inputStream != null) {
inputStream.close();
}
if (httpURLConnection != null) {
httpURLConnection.disconnect();
}
}
return jsonresponse;
}
private static final String readfromstream(InputStream inputStream) throws IOException {
StringBuilder output = new StringBuilder();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, Charset.forName("UTF-8"));
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String urlline = bufferedReader.readLine();
while (urlline != null) {
output.append(urlline);
urlline = bufferedReader.readLine();
}
return output.toString();
}
private static List<News> JSONParser(String NewsJSON) throws JSONException {
if (TextUtils.isEmpty(NewsJSON)) {
return null;
}
List<News> news = new ArrayList<>();
try {
JSONObject basejson = new JSONObject(NewsJSON);
JSONArray articles = basejson.getJSONArray("articles");
for (int i = 0; i < articles.length(); i++) {
News newss = new News();
JSONObject c = articles.getJSONObject(i);
JSONObject source = c.getJSONObject("source");
newss.setMsource(source.getString("name"));
newss.setMtitle(c.getString("title"));
newss.setMdescription(c.getString("description"));
newss.setMtime(c.getString("publishedAt"));
String image = c.getString("urlToImage");
if (image != null) {
newss.setmImage(c.getString("urlToImage"));
}
newss.setNewsURL(c.getString("url"));
news.add(newss);
}
} catch (JSONException j) {
Log.e(LOG_TAG, "couldn't parse jSON");
}
return news;
}
public static List<News> fetchnews(String search_query) throws IOException, JSONException {
URL url = createUrl(search_query);
String JSONRESPONSE = null;
try {
JSONRESPONSE = HTTPREQUEST(url);
} catch (IOException j) {
j.printStackTrace();
}
List<News> news = JSONParser(JSONRESPONSE);
return news;
}
#Override
protected void onNewIntent(Intent intent) {
setIntent(intent);
try {
handleIntent(intent);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
private void handleIntent(Intent intent) throws MalformedURLException {
if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
query_string = intent.getStringExtra(SearchManager.QUERY);
Log.i(LOG_TAG, "The querytext is" + query_string);
}
}
}
This whole process of refreshing the list view is done by a AsyncTaskLoader
The custom Asyntaskloader class is copied below:
public class NewsLoader extends AsyncTaskLoader<List<News>> {
private String mUrl;
private static String LOG_TAG = NewsLoader.class.getName();
public NewsLoader(Context context, String url) {
super(context);
mUrl = url;
}
#Override
protected void onStartLoading() {
forceLoad();
}
#Override
public List<News> loadInBackground() {
if (mUrl == null) {
return null;
}
List<News> news = null;
try {
news = SearchResultsActivity.fetchnews(mUrl);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return news;
}
}
Now I have the search query entered by the user stored in the search_query_input variable in the MainActivity.
But the app just gets stuck when I press the submit button. The override methods for the asynctaskloader are not getting executed at all.
What is happening? Any help will be much appreciated.

searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener(){
onQueryTextChange(String newText){
//when user type in searchview get string as newText parameter
asynTaskMethod(newText);
}
onQueryTextSubmit(String query){
//when user press submit button in searchview get string as query parameter
asynTaskMethod(query);
}
});

Direct to android-mail client when clicking a button

hi,
this is a single Item View of a ListView. I wan't to go to email
client when clicking a Button in below fragment. there is a email
column in parse database . when clicking the button it should lead to
email client with that particular email id of this single item view .
I tried some code its not working anyone please help ??
import android.content.*;
import android.graphics.*;
import android.net.*;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.*;
import android.view.View;
import android.widget.*;
import com.parse.*;
import com.parse.ParseException;
import com.squareup.picasso.*;
import java.io.*;
import java.net.*;
public class SingleItemView extends AppCompatActivity {
String objectId;
protected TextView txtv;
protected TextView txtv1;
protected ImageView txtv2;
protected ImageView txtv3;
Button sendEmail;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_single_item_view);
txtv =(TextView)findViewById(R.id.txt123);
txtv1 =(TextView)findViewById(R.id.txt1234);
txtv2 =(ImageView)findViewById(R.id.txt12345);
txtv3 =(ImageView)findViewById(R.id.txt123456);
Intent i =getIntent();
objectId = i.getStringExtra("objectId");
ParseQuery<ParseObject> query = ParseQuery.getQuery("_User");
query.getInBackground(objectId, new GetCallback<ParseObject>() {
public void done(ParseObject object, ParseException e) {
if (e == null) {
String username = object.getString("firstname");
txtv.setText(username);
String position = object.getString("position");
txtv1.setText(position);
URL url = null;
try {
url = new URL("http://izi-dev.fr/fbc/assets/uploads/" + object.getString("image"));
} catch (MalformedURLException e1) {
e1.printStackTrace();
}
Bitmap bmp = null;
try {
bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch (IOException e1) {
e1.printStackTrace();
}
txtv2.setImageBitmap(bmp);
URL url1 = null;
try {
url = new URL("http://izi-dev.fr/fbc/assets/uploads/" + object.getString("image"));
} catch (MalformedURLException e1) {
e1.printStackTrace();
}
Bitmap bmp1 = null;
try {
bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
} catch (IOException e1) {
e1.printStackTrace();
}
txtv3.setImageBitmap(bmp);
} else {
// something went wrong
}
}
});
sendEmail = (Button) findViewById(R.id.button5);
sendEmail.setOnClickListener((View.OnClickListener) this);
}
public void onClick(View v) {
try{
Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
emailIntent.putExtra(Intent.EXTRA_EMAIL , "email");
emailIntent.setType("text/plain"); // <-- HERE
startActivity(emailIntent); // <-- AND HERE
}finally {
}
}
}

Try this:
sendEmail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(view.getId()==R.id.button5){
Intent i = new Intent(Intent.ACTION_SEND);
i.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{ emailAddress });
i.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
i.putExtra(android.content.Intent.EXTRA_TEXT, text);
startActivity(Intent.createChooser(i, "Send email"));
}
}
});

You have set the click listener in wrong way.
Implement the ClickListener
public class SingleItemView extends AppCompatActivity implements View.OnClickListener
Set the listener
sendEmail.setOnClickListener(this);
Use annotations
#Override
public void onClick(View v)
Please try that.

As i may understood correctly your problem, I suggest you to use the following plugin https://github.com/katzer/cordova-plugin-email-composer#examples. Basically with this plugin you can send HTML embodeed body with the click of a button.
cordova.plugins.email.open({
to: 'max#mustermann.de',
subject: 'Greetings',
body: '<h1>Nice greetings from Leipzig</h1>',
isHtml: true
});
Please check the documentation for further info. I hope i helped you.

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.

POST not occuring on Android?

Hey so I am not getting an error, but all my logs get initiated except for the one after HttpResponse not sure why, and on the server end I do not see any activity of a POST coming in...
here is my code:
package com.sfsfdsfds;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class wardrobe extends Activity{
//set variable for the fields
private EditText nameField;
private Spinner typeField;
private EditText colorField;
private Spinner seasonField;
private EditText sizeField;
private EditText quantityField;
private ImageView imageField;
private ProgressBar progressBarField;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.wardrobe);
ImageView user_photo = (ImageView) findViewById(R.id.user_photo);
//button for upload image
Button uploadImageButton = (Button) findViewById(R.id.uploadImageButton);
//button for posting details
Button postWardrobe = (Button) findViewById(R.id.postButton);
//Value of fields
nameField = (EditText) findViewById(R.id.nameFieldWardrobeScreen);
typeField = (Spinner) findViewById(R.id.typeFieldWardrobeScreen);
colorField = (EditText) findViewById(R.id.colorFieldWardrobeScreen);
seasonField = (Spinner) findViewById(R.id.seasonFieldWardrobeScreen);
sizeField = (EditText) findViewById(R.id.sizeFieldWardrobeScreen);
quantityField = (EditText) findViewById(R.id.quantityFieldWardrobeScreen);
imageField = (ImageView) findViewById(R.id.user_photo);
progressBarField = (ProgressBar) findViewById(R.id.progressBarWardrobe);
progressBarField.setVisibility(View.GONE);
//Creating spinner for select/options for type field
Spinner spinnerType = (Spinner) findViewById(R.id.typeFieldWardrobeScreen);
ArrayAdapter<CharSequence> adapterTypeArray = ArrayAdapter.createFromResource(this, R.array.type_array, android.R.layout.simple_spinner_item);
adapterTypeArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerType.setAdapter(adapterTypeArray);
//Creating spinner for select/options for season field
Spinner spinnerSeason = (Spinner) findViewById(R.id.seasonFieldWardrobeScreen);
ArrayAdapter<CharSequence> adapterSeasonArray = ArrayAdapter.createFromResource(this, R.array.season_array, android.R.layout.simple_spinner_item);
adapterSeasonArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerSeason.setAdapter(adapterSeasonArray);
uploadImageButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//below allows you to open the phones gallery
Image_Picker_Dialog();
}
});
postWardrobe.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//validate input and that something was entered
if(nameField.getText().toString().length()<1 || colorField.getText().toString().length()<1 || sizeField.getText().toString().length()<1 || quantityField.getText().toString().length()<1) {
//missing required info (null was this but lets see)
Toast.makeText(getApplicationContext(), "Please complete all sections!", Toast.LENGTH_LONG).show();
} else {
JSONObject dataWardrobe = new JSONObject();
try {
dataWardrobe.put("type", typeField.getSelectedItem().toString());
dataWardrobe.put("color", colorField.getText().toString());
dataWardrobe.put("season", seasonField.getSelectedItem().toString());
dataWardrobe.put("size", sizeField.getText().toString());
dataWardrobe.put("quantity", quantityField.getText().toString());
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//make progress bar visible
progressBarField.setVisibility(View.VISIBLE);
//execute the post request
new dataSend().postData(dataWardrobe);
}
//below should send data over
}
});
}
// After the selection of image you will retun on the main activity with bitmap image
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == Utility.GALLERY_PICTURE)
{
// data contains result
// Do some task
Image_Selecting_Task(data);
} else if (requestCode == Utility.CAMERA_PICTURE)
{
// Do some task
Image_Selecting_Task(data);
}
}
public void Image_Picker_Dialog()
{
AlertDialog.Builder myAlertDialog = new AlertDialog.Builder(this);
myAlertDialog.setTitle("Pictures Option");
myAlertDialog.setMessage("Select Picture Mode");
myAlertDialog.setPositiveButton("Gallery", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface arg0, int arg1)
{
Utility.pictureActionIntent = new Intent(Intent.ACTION_GET_CONTENT, null);
Utility.pictureActionIntent.setType("image/*");
Utility.pictureActionIntent.putExtra("return-data", true);
startActivityForResult(Utility.pictureActionIntent, Utility.GALLERY_PICTURE);
}
});
myAlertDialog.setNegativeButton("Camera", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface arg0, int arg1)
{
Utility.pictureActionIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(Utility.pictureActionIntent, Utility.CAMERA_PICTURE);
}
});
myAlertDialog.show();
}
public void Image_Selecting_Task(Intent data)
{
ImageView user_photo = (ImageView) findViewById(R.id.user_photo);
try
{
Utility.uri = data.getData();
if (Utility.uri != null)
{
// User had pick an image.
Cursor cursor = getContentResolver().query(Utility.uri, new String[]
{ android.provider.MediaStore.Images.ImageColumns.DATA }, null, null, null);
cursor.moveToFirst();
// Link to the image
final String imageFilePath = cursor.getString(0);
//Assign string path to File
Utility.Default_DIR = new File(imageFilePath);
// Create new dir MY_IMAGES_DIR if not created and copy image into that dir and store that image path in valid_photo
Utility.Create_MY_IMAGES_DIR();
// Copy your image
Utility.copyFile(Utility.Default_DIR, Utility.MY_IMG_DIR);
// Get new image path and decode it
Bitmap b = Utility.decodeFile(Utility.Paste_Target_Location);
// use new copied path and use anywhere
String valid_photo = Utility.Paste_Target_Location.toString();
b = Bitmap.createScaledBitmap(b, 150, 150, true);
//set your selected image in image view
user_photo.setImageBitmap(b);
cursor.close();
} else
{
Toast toast = Toast.makeText(this, "Sorry!!! You haven't selecet any image.", Toast.LENGTH_LONG);
toast.show();
}
} catch (Exception e)
{
// you get this when you will not select any single image
Log.e("onActivityResult", "" + e);
}
}
#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;
}
//Calling code for different selected menu options
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()) {
//show settings activity screen (main preference activity file)
case R.id.wardrobe:
Intent intent = new Intent(wardrobe.this, wardrobe.class);
startActivity(intent);
//if index button clicked in menu sub-menu options
case R.id.matches:
Toast.makeText(this, "matches was clicked!", 5).show();
//if index button clicked in menu sub-menu options
case R.id.worn:
Toast.makeText(this, "worn was clicked!", 5).show();
default:
}
return super.onOptionsItemSelected(item);
}
private class dataSend extends AsyncTask<JSONObject, Integer, Double> {
protected Double doInBackground(JSONObject... params) {
// TODO Auto-generated method stub
postData(params[0]);
return null;
}
protected void onPostExecute(Double result) {
progressBarField.setVisibility(View.GONE);
Toast.makeText(wardrobe.this, "info sent", Toast.LENGTH_LONG).show();
}
protected void onProgressUpdate(Integer... progress) {
progressBarField.setProgress(progress[0]);
}
public void postData(JSONObject dataWardrobe) {
Log.v("posting data", "poooooost");
// Create a new HttpClient and Post Header
//int TIMEOUT_MILLISEC = 10000; // = 10 seconds
HttpParams httpParams = new BasicHttpParams();
//HttpConnectionParams.setConnectionTimeout(httpParams, TIMEOUT_MILLISEC);
//HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);
HttpClient httpclient = new DefaultHttpClient(httpParams);
HttpPost httppost = new HttpPost("http://127.0.0.1:3000/wardrobe");
Log.v("posteed", "posteed url");
try {
Log.v("trying data", "prep");
//add data
StringEntity se = new StringEntity( dataWardrobe.toString());
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
httppost.setEntity(se);
Log.v("posteed", "posteed 11");
// execute http post request
HttpResponse response = httpclient.execute(httppost);
Log.v("posteed", "posteed 22");
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
}
}
Not sure what I am doing wrong, I tried various things and trying to look up different ways to go about doing this and none of them have worked... maybe it is something more simple than I see... the problem I think lies in the private class within this class.

I haven't read your code in great detail, but I suspect a strong contributor is this:
HttpPost httppost = new HttpPost("http://127.0.0.1:3000/wardrobe");
If you're using the emulator it's probably more likely you want to connect to "10.0.2.2". which is:
Special alias to your host loopback interface (i.e., 127.0.0.1 on your
development machine)
See here for more details on the emulator networking:
http://developer.android.com/tools/devices/emulator.html#emulatornetworking