android - Can't return an Array list from AsyncTask into Main Activity? -


I can not understand how the object is returned from the AsyncTask which is ArrayList . Right now if I try to add tours.add (tour); Return to the list inside AsyncTask return code; How can I break from AsyncTask and successfully return these objects to my main activity?

Category with ArrayList: 

  Public class Jason Parser {list & lt; Travel & gt; Tourism = new arreelist & lt; Travel & gt; (); Tourism data source datasource; Private string LOGTAG; // reference CTX; // Public JasonPerser (reference reference) {// ctx = context; //} Public listing & lt; Travel & gt; StartJson (Reference Reference) {AsyncHttpClient Client = New AsyncHttpClient (); Client.get ("http://edmondvarga.com/android_dev/party_alarm/test_j.php", New AsyncHttpResponseHandler () {@Success Public Overhead (string response) {try {JSONObject jsonObj = new JSONObject (response); JSONArray Contact = JsonObj.getJSONArray ("user"); for (int i = 0; i & lt; contacts.length (); i ++) {JSONObject json = contacts.getJSONObject (i); Tour tour = new tour ( ); Tour.setTitle (Json.getString ("title"); // string c = json.getString ("content"); Log.i (LOGTAG, "Travel ID created with:" + tour.getTitle ( ); Tours.add (tour);}} Hold (JasonXExation E) {e.printStackTrace ();}}}); Return tourism; }}   
 Part of my main activity:  
  Public Zero DataData () {JsonParser jp = new JsonParser (); & Lt; Tour & gt; Tourism = jp.startJson (this); // ToursPullParser Parser = New ToursPullParser (); // from the list & lt; Tour & gt; Tourism = parser Prsxml (this); For (Tour tour: Tourism) {Datasource. Crete (tour); }    
 
 
 Your problem is that the work is asynchronous following the system (the image we understand better Are working on only one core):  call startJson   to create asyncTask , but now the system is still  startJson . Now the system things are fine, this is the right time to start the ASC work and it fills your list. But if you have already returned it then the solution is quite easy. Call another method at the end of  onSuccess , which handles results for further operations. (Or just do it on  in Success , because it's already on the main thread)  
  @edit:   
  Public Sector Jason Parser {list & lt; Travel & gt; Tourism = new arreelist & lt; Travel & gt; (); Tourism data source datasource; Private string LOGTAG; // reference CTX; // Public JasonPerser (reference reference) {// ctx = context; //} private finals main activity mCallback; Public JsonParser (main activity callback) {mCallback = callback; } Public listing & lt; Travel & gt; StartJson (Reference Reference) {AsyncHttpClient Client = New AsyncHttpClient (); Client.get ("http://edmondvarga.com/android_dev/party_alarm/test_j.php", New AsyncHttpResponseHandler () {@Success Public Overhead (String Response) {Try {JSONObject jsonObj = New JSONObject (Response); JSONArray Contact = JsonObj.getJSONArray ("user"); for (int i = 0; i & lt; contacts.length (); i ++) {JSONObject json = contacts.getJSONObject (i); Tour tour = new tour ( ); tour.setTitle (Json.getString ("title"); // string c = json.getString ("content"); Log.i (LOGTAG, "Travel ID created with:" + tour.getTitle ( ); tours.add (tour);}} Grip (JasonXSpeep e) {e.printStackTrace ();} callback.setResult (Tourism);}}); Public class main activity .... Public Award made data () {JasonPerser JP = new JasonPerson (this); & Lt; Tour & gt; Tourism = jp.startJson (this); } Public Zero Set Result (List & Travel; Travel & Tourism) {Tour (Tour: Tourism) {//.}}

Comments

Post a Comment

Popular posts from this blog

c# - ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type already has the same primary key value -

In brief, the wrapper module is inserted during posting and the status of an entry is changed to 'modified' . Before changing the state, the state is set to 'separate', but calling attachments () causes the same error to be thrown away. I am using EF 6. Model / wrapper class public class avi model {public A is a {get; Set; } Public listing & lt; B & gt; B {received; Set; } Public cc {receipt; Set; }} Administrator edit public functioning (int? id) {if (id == null) {new HttpStatusCodeResult (HttpStatusCode.BadRequest); } If (! Conveyor Access (id.Value)) new HTTPTitus code result (HTTP status code. Forbidden); Var aViewModel = new AViewModel (); aViewModel.A = db.As.Find (id); If (aViewModel.Receipt == zero) {return HttpNotFound (); } aViewModel.b = db.Bs.Where (x => x.aid == id.Value) .Oolist (); AViewModel.Vendor = db.Cs.Where (x => x.cid == aViewModel.a.cID) .FirstOrDefault (); See Return (aViewModel); } [HTPFost] [Valid AntitiferousTeacon...
Read more

jasper reports - How to center align barcode using jasperreports and barcode4j -

I use iReport 5.5.0 . How to align a barcode component to the center The relevant piece of my jrxml is below & Lt; JR: Code 128 xmlns: JR = "http://jasperreports.sourceforge.net/jasperreports/components" xsi: schemaLocation = "http://jasperreports.sourceforge.net/jasperreports/components http: //jasperreports.sourceforge Purge / xsd / components.xsd "textPosition =" bottom "& gt; & Lt; Jr: codeExpression & gt; & Lt; [CDATA [$ F {number}]] & gt; & Lt; / Jr: codeExpression & gt; & Lt; / Jr: Code 128 & gt; & Lt; / componentElement & gt; "Text" itemprop = "text"> Create a style after this, it is called "barcode", like: & lt; Style name = "barcode" fontName = "Helvetica" fONTSIZE = "10" hAlign = "center" valign = "center" /> and set the property of your barcode element to "barcode".
Read more

django - CommandError: You must set settings.ALLOWED_HOSTS if DEBUG is False -

I use Django 1.6.5 with settings in my program txsite: DEBUG = true I set the lie to debug, but when I get the runner , I get the following error: CommandError: You have to set the settings. OLOWOWHESTS If DEBUG is False I ALLOWED_HOSTS = ['127.0.0.1', 'localhost'] but I get the same error. Does anyone know this address? Try ALLOWED_HOSTS = ['*'] Less secure If you are not on a firewall or public LAN, but what I use and it works. Edit: Interestingly enough, I have to add some of my 1.8 projects, even if DEBUG = True . Why so very uncertain
Read more