java,android,jsonRelated issues-Collection of common programming errors

  • Zar
    java oop loops iterator
    I’m trying to iterate throuh a list while already looping through it (nested loops). Consider the code below:ArrayList<Integer> list = new ArrayList<Integer>(); // add some values to itfor(int i : list) { // ConcurrentModificationExceptionIterator iterator = list.iterator();while(iterator.hasNext()) {int n =;if(n % i == 0) {iterator.remove();}}}The example above results in a ConcurrentModificationException. The condition to remove an element is, of course, just an exa

  • blank
    java jax-ws axis2
    I’m completely stuck and need your help… I’ve created a webservice stub with jaxb 2.x for a service that sends a binary file (base64 encoded jpg images) within a soap message. Everything worked fine and I was able to receive and display the images, until I tried to export the eclipse RCP app to a product, which caused imediatly LinkageErrors (as usual, javax.xml.namespace.QName and some more).I was able to solve that problem to ‘rebundle’ axis2 and now everything works fine again – except the

  • Cave Dweller
    java libgdx
    The full code is on GitHub.I’m fairly certain the issue with rendering is in (src/com/me/pong/ in the render() method:@Overridepublic void render() {update();“Pong | ” + (int)(1.0f/ + ” FPS” );, 1, 1, 1);;camera.update();batch.setProjectionMatrix(camera.combined);batch.begin();for(Entity e : entities) {e.draw(batch);}batch.end();}as there doesn’t seem to be any issue

  • Robert Harvey
    java sleep timertask
    I have a stream of events recorded (for example an ArrayList<InputEvent> sorted by InputEvent.getWhen()). Differences in time between consecutive events can be of the order of tens of milliseconds. My goal is to execute (“replay”) the recorded stream as accurate as possible, that is, to execute the first event InputEvent firstEvent at long startTime = System.currentTimeMillis(), the second at startTime + (secondEvent.getWhen() – firstEvent.getWhen()), and so on.Of course, the most accurate

  • Metaphalon
    java spring gwt
    i have an application using spring 3.2.1, gwt 2.4 and hibernate.This deploys fine in tomcat and runs without errors.When i try to start a GWT dev mode server for development, the server fails with following errorLoading[ERROR] Unexpected error while processing XMLjava.lang.NullPointerExceptionat$Impl.startElement( org.allcolor.xml.parser.CShaniSaxParser.parseStartTag(

  • prabu
    java findbugs
    I am using Findbugs integerated with eclipse.When i run findbug on my project the below code is not captured for possible null pointer exception. In the below snippet the object test is prone to null pointer exception which is not identified by findbugs. @Overridepublic boolean saveIrr(TestObject test) throws DuplicateRecordException {boolean status = falsetry {test.getAddDate();status = adhocMaintPopupMapper.saveIrr(IRRPopupMaint);} catch (DataIntegrityViolationException e) {logger.error(“Error

  • Hosam Aly
    java enums
    I’ve an enum type: ReportTypeEnum that get passed between methods in all my classes but I then need to pass this on the URL so I use the ordinal method to get the int value. After I get it in my other JSP page I need to convert it to back to an ReportTypeEnum so that I can continue passing it. How can I convert ordinal to the ReportTypeEnum?Using Java 6 EE.

  • grkvlt
    java cassandra cql3 datastax-java-driver
    I have Cassandra 1.2.11 running on my laptop. I can connect to it using nodetool and cqlsh but when I try and use the DataStax 1.0.4 Java API to connect using CQL 3.0 I get the following error:com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: localhost/ ([localhost/] Unexpected error during transport initialization (com.datastax.driver.core.TransportException: [localhost/] Channel has been closed)))at com.datastax.

  • Sotirios Delimanolis
    java generics arraylist
    I have two types that extend the generic ArrayList type.public class BuyersGuideResponse extends ArrayList<BuyersGuideItem> {private void checkStatusAttributes(){ … }private void addItems(){ … } }public class CatalogEngineTypeResponse extends ArrayList<CatalogEngineType> {private void checkStatusAttributes(){ … }private void addItems(){ … } }The checkStatusAttributes method is identical in both types so I’d like to create a abstract generic intermediate type. I currently have

  • Infotechie
    java css html-to-pdf xhtmlrenderer
    I have a java web application in which I am converting help guide of HTML pages into pdf. Html to pdf conversion is working fine but following error is coming:WARNING: Can’t read image file; unexpected problem for URI ‘http://localhost:8080/App/content/css/abc.css’ http://localhost:8080/App/content/css/abc.css’ is not a recognized imageformat. at com.lowagie.text.Image.getInstance( at org.xhtmlrenderer.pdf.ITextUserAgent.getImageResource(

  • PX Developer
    android exception android-asynctask sharedpreferences
    I have an application that stores some data in SharedPreferences. This control data is synchronized with a server, and when the user logins in the application I retrieve it using an AsyncTask. I’m trying to store the data retrieved in SharedPreferences again, but I’m getting a java.lang.ExceptionInInitializerError. This is the AsyncTask code:public class RetrieveLogTask extends AsyncTask<Void, Void, Boolean> {private String errorMessage;@Overrideprotected Boolean doInBackground(Void… par

  • user2237853
    android ubuntu adb android-studio
    When I go to install the packages from with Android Studio I get a “ADB not responding” error with wait/restart/close options. I can run adb from a term. I can see my device and install the apk from the cmd line, but it doesn’t work from within Android Studio.In the terminal (that is running Android Studio) I get the following 03:56:36 E/adb: Unexpected exception ‘Cannot run program “/media/5b317046-147a-42ee-aec1-f73caf1922c5/home/kloud9/WorkSpace/downloads/workspace/android-studio/sdk/platform

  • Mohit
    android optionmenu
    flipper = (ViewFlipper) findViewById(;flipper.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {flipper.showNext();}}); }@Override public boolean onPrepareOptionsMenu(Menu menu) {if(flipper.isFlipping()){menu.removeItem(0);}else{menu.removeItem(1);}return true; }@Override public boolean onCreateOptionsMenu(Menu menu) {menu.add(0, 0, 0, “start slideshow”);menu.add(0, 1, 1, “stop slideshow”);menu.add(0, 2, 2, “close”);return super.onCreateOptions

  • ophilbert
    android android-layout rotation android-animation rotateanimation
    I’m trying to make an animation on a layout that has been previously rotated using RotateAnimation. The animation i want to do are fadeIn and FadeOut depending of the situationaLayout = (LinearLayout) _context.findViewById(R.layout.layoutId);AlphaAnimation fadeIn = new AlphaAnimation(0, 1.0f);AlphaAnimation fadeOut = new AlphaAnimation(1.0f, 0);fadeIn.setDuration(500);fadeOut.setDuration(500);fadeIn.setFillAfter(true);fadeOut.setFillAfter(true);Depending of the situation i apply :aLayout.startAn

  • Usama Shakeel
    I am working on Wi-Engine and currently facing the issue while loading two sheets into zwoptex manager. In the code below I am loading two sheets (sheeta and sheetb), with two animations which are stored as actions in class (firstAction, secondAction). Later when I runAction on the sprite on button click, the firstAction runs fine but the secondAction uses the texture of firstAction with frames of second, which causes unexpected result. kindly if you can let me know what I am missing or doing wr

  • Chirag Raval
    android web-services ksoap2
    package com.demowold;import;import android.os.Bundle; import android.widget.Button; import android.widget.EditText; import android.widget.TextView;import org.ksoap2.SoapEnvelope; import org.ksoap2.serialization.SoapObject; import org.ksoap2.serialization.SoapSerializationEnvelope; import org.ksoap2.transport.HttpTransportSE; public class DemoWold extends Activity {private EditText etUserName; private TextView lblResult; /** Called when the activity is first created. */privat

  • pawel
    android gradle android-studio facebook-android-sdk
    I followed this guide on official facebook developers site: when im trying to build first sample app im getting error:Gradle: Error while executing dx command Gradle: UNEXPECTED TOP-LEVEL EXCEPTION: Gradle: java.lang.IllegalArgumentException: already added: Landroid/support/v4/widget/CursorAdapter$1; Gradle: at Gradle: a

  • Creights
    android mysql sql cursor
    When I run the following query, I get unexpected results:String[] columns = new String[] { KEY_ROWID, KEY_NAME, KEY_SCORE };Cursor c = mDb.query(DATABASE_TABLE, columns, null, null, null, null, KEY_SCORE + ” DESC”, “10”);String result = “”;So, this should sort the results by the KEY_SCORE column in my table, and sort them based on descending order. When I do this, I get the following results:Mr Z – 72 Mr S – 70 Mr A – 50 Mr B – 50 Mr T – 130 Mr X – 125It therefore seems to be grouping the valu

  • Jack BeNimble
    android fonts custom-font
    I’m using a custom font for a Japanese quiz app on Android. I tried it on a friend’s phone at a cookout, and the font did not show up (it shows up on mine and others). The font is delivered with the apk. I don’t have access to the logcat, and unfortunately forgot to check the phone model, although I think it’s kind of a budget version. Has anyone had this problem this, or have any ideas what might cause it?

  • Davek804
    php android mysql foreach
    Trying to make manageable output for Android to convert $output into JSONObjects. When I use the commented out bottom line, it receives the data in Android’s log just fine, but can’t convert JSONArray to JSONObject – thus the desire for a foreach loop to return each SQL row on its own. I can’t see any syntax issues, so I don’t know what PHP is complaining about – any ideas? Also, when I use the commented out print code, it returns proper results, so I know it’s no problem accessing the db. Here’

  • Van J. Wilson
    ruby json erb middleman
    I have a JSON data file in my Middleman project that has an object with info about 5 sections of a a site where we are building prototypes for a new project. Here is part of that file:”industries”: {“Insulation”: {“url”: “insulation”,”color”: “#B48126″},”Roofing”: {“url”: “roofing”,”color”: “#52bd4a”}, …I’d like to pull attributes from that object based on the current page.For instance, if I’m on page in the Insulation section, I’d like grab the highlight color for insulation from that file an

  • Vadim Gremyachev
    json rest powershell
    The following JSON is returned from SharePoint REST service:{“d”: {“results”: [{“__metadata”: {“id”: “c7b44ed8-a1fc-44cb-ab36-46aacf1ff992″,”uri”: “https:\/\/\/_api\/Web\/Lists(guid’c2477113-c582-4c57-bcc6-d4a5ea2e29c9′)\/Items(1)”,”etag”: “\”1\””,”type”: “SP.Data.Nokia_x0020_OfficesListItem”},”FirstUniqueAncestorSecurableObject”: {“__deferred”: {“uri”: “https:\/\/\/_api\/Web\/Lists(guid’c2477113-c582-4c57-bcc6-d4a5ea2e29c9′)\/Items(1)\/FirstUniqueAnce

  • Optimus
    objective-c json web-services
    I’m new in ios development. I’m developing an app which consuming soap web services and I’m facing a problem now The method in webservice return value as json string but it look like xml data which is given below <?xml version=”1.0″ encoding=”utf-8″?> <string xmlns=””>[“data”1,”data”2,”data”3,”data”4]</string>because of that I cant convert the json to NSArray using SBJSONParser when I’m trying to parse it showing the following error-JSONValue failed. Error i

  • duncan
    javascript jquery json google-maps-api-3
    Here’s my code:<script src=”//”></script> <script>var API = “,+Mountain+View,+CA&sensor=true”;var API = “”;$.getJSON(API, function (data) {console.log(data); }); </script>If I comment out the second var API, I get a returned result

  • choroba
    php json phpmyadmin
    I am trying to get the postcode with one query and use it in the where clause for another query.<?php $mobile = ‘07790807055’; //$mobile = $_POST[‘mobile’];mysql_connect(“”, “”, “”) or die(mysql_error()); mysql_select_db(“”) or die(mysql_error());$query =(“SELECT POSTCODE FROM appregistration WHERE MOBILE_NUMBER = ‘$mobile'”); $result = mysql_query ($query) or die (“Unable to connect. ” . mysql_error()); $row = mysql_fetch_array($result); $postcode = $row[‘POSTCODE’]; /// gets postcode from a

  • Rohan Kumar
    php jquery ajax json
    Hi friends can anyone me for this plz. im new to this chapter..i am trying to get JSON format value from PHP but while im running i got this output “SyntaxError: JSON.parse: unexpected characte”.. i think i had done mistake in php conversion …plz help me friends my .html file<html> <head><script src=””></script><title>Display Page</title> </head> <body><button type=’button’ id=’getdata’>GetData.<

  • raheel shan
    html json codeigniter
    i need help ! i want to retrieve json data from a Codeigniter server. This is my html local file (d://myproject/index.html)$.ajax({type: “POST”,url : serverUrl+’mobcontroller/users/’,crossDomain: true,async: false,data : $(“#formlogin”).serialize(),dataType : MobileJsonType[1],beforeSend : function(){//do stuff here},success : function(responseData) {alert(JSON.stringify(responseData));},error : function(jqXHR, textStatus, errorThrown) {// do stuff here },complete: function(xhr, settings){ale

  • PieOneer
    python json dictionary weather
    I want to write weather information to a file and read it with another script. Currently I’m stuck at writing to file. Original Code:#!/usr/bin/env python3 from pprint import pprint import pywapi import pprint pp = pprint.PrettyPrinter(indent=4)steyregg = pywapi.get_weather_from_weather_com(‘AUXX0022’)pp.pprint(steyregg)this give me output like this:> { ‘current_conditions’: { ‘barometer’: { ‘direction’: u’falling > rapidly’, > ‘read

  • Hugolpz
    javascript jquery json handlebars.js mustache
    Given html with an anchor and an handlebars/mustache’s template:<!– 1. Anchor –> <div id=”anchor”>Anchor</div><!– 2. HTML-Mustache template –> <script id=”?pl” type=”text/template”>{{#people}}<li><b>{{family}} {{name}}</b> ({{title}}, {{place}}) : {{introduction}}.</li>{{/people}} </script>Given a data.json (proven valid & from an 3rd party website): {“people”: [{“family”: “Lopez”,”name”: “Hugo”,”title”: “leader”,”place”: “Paris

  • Noel Proulx
    javascript json
    Hello and thank you for the time you are taking to look at this.The problem I am having is with a JSON return from a third party service so I have no control over how the JSON is formatted. I am using the following (stripped down to the important pieces)function JSONgrabber(Zip,iplocation){var requestBase =””;var requestData =”iplocate=true&output=json&callback=useJSON”;var request=requestBase+”&&zip=”+Zip+”&”+requestData;if(iplocation ==

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