Tell about the "asynctask" used in android application. Currently I am working on an application where I have to create a Class in which I have to just get the response of any particular URL given. I this particular class I was told to perform this task by making use of "asynctask".
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I'm trying to figure out the correct way to create an AsyncTask to retrieve some data from the internet and then to take that data and bundle it up in an Intent and pass it to a new activity(A list display). So in the first activity I just have an EditText and Button. In the event of an OnClick the task should be called and when it is finished the data should be bundled inside an Intent and passed to the next Activity. The problem is when I take the results from onPostExecute and set them to an instance variable of the main activity, that instance variable is still null when the task is complete. Here is the barebones version of the code:
CODE:...........
When I debug the application I see onPostExecute does contain a valid PlacesList full of results, so why is the instance variable places set to null after the task is executed? I am going about "returning data" from an AsyncTask incorrectly?
Back when we all found out about the bad gps on this phone there was talk to file a complaint against att for false advertising of gps capabilities with the Captivate. Well, I was pissed and went ahead and filed the complaint. I received a letter in the mail a few weeks ago that the FCC had received the complaint.Today, I received a response from ATT in my inbox.
View 48 Replies View Relatedanyone else having issues using the keyboard / inputing text while the hero is lying flat down on a table? i sometimes get no response or sluggish response when its on a table and i'm trying to send e-mail or texting. I tried re-calibrating and works fine when I hold it upwards/regular.
View 1 Replies View RelatedI've written a port scanner for Android. It works properly when using a connection over Wifi, but on the mobile (3G) connection, everything reports a false positive.Why is this? I don't know very much about the way the mobile data network is structured and I'd like to know more. Is my service provider meddling with the connections, or have I just done something wrong?
View 4 Replies View RelatedI have a problem. I'm doing a http post request to a URL like this; DefaultHttpClient httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(url); HttpResponse response = httpclient.execute(httppost); I am able to get the response content (html in this case) but I would like to be able to get the url of the response. Is there a way? Or could i use some other technique to do the post request and retrieve the url? The repsonse url is lke www.url.com?x=1&y=2 and would like to get the parameter values, I've tried to use the getParams().getParameter() on the HttpResponse object without any success. So if anyone has a solution to get the parameters without getting the url.
View 16 Replies View RelatedCode... I want to get Session Key from here. How to get it.
View 2 Replies View RelatedI want to Consume the SOAP Web Services in Android
I downloaded KSOAP2 Library
I have done some thing like this ......
CODE:..................
Android VM crash in a Samsung Galaxy running a code good working with emulator. My code call facebook rest service to get my friends info. But when I get server response VM crash...........
View 5 Replies View RelatedHow can i response from the server without request? I can send httpRequest but i want to server will be able to send any response whenever it want. (Server will be able to push to handset) Must i install web server to my android?
View 2 Replies View RelatedSometimes when I try to scroll using a scrollview (wrapped around a textview), there will be no response. I've noticed this in both my apps and the only common thing between them is the textview in both apps use Spanned (SpanableStringBuilder to be exact) text. This happens even when there is no activity on the window and no any pops up either.
View 7 Replies View RelatedCurrently, I use a regular activity with some EditText fields as a registration screen in my application.The inputs are used to construct a soap message which is posted to the registration server, with the response being parsed to do some configuration of the application.I'd like to change this to have the registration page load in a WebView instance, so that the registration process takes place on an external web page.This would make it easier to make changes to the registration process without having to deploy a new build, as it would just be a matter of changing the web page that is loaded in the WebView.The question is would there be any way for me to get the response that is sent back from my registration server to the client? From what I can tell, if I went this route, there wouldn't be a way for me to parse the response like I currently do to initialize the application settings.
View 2 Replies View RelatedI have two queries based on XML parsing which comes as httpresponse. am sending an httprequest to a site with a GET header. The response I expect is to be in XML. First, I need to know whether I am getting XML as the httpresponse. Is there any method which checks whether the received response is in XML or not? Second, I need help in parsing the XML which I get from the httpresponse. I am pasting a code snippet here which I have written : Can you guys look at the above code and tell me how to get the xml data from the httpresponse? Code...
View 2 Replies View RelatedI want to know how to parse the web service response data in android .Actually i m accessing the .net web service.I can get a result of some complex type.i want to know how to retrive a particular value from this complex type.Is there is any parser available to parse the content of the response or else we have to parse manually? If u have any code snippet pls bring me.
View 3 Replies View RelatedCalling a .net SOAP1.1 web service from android using ksoap2 lib I met a problem of casting response to a custom object. For instance the code below is called correct after httpTransport.call(soap Action, soapEnvelope); and have data inside. But I cant't cast it to specific object neither to SoapObject or Vector as I saw in several examples, I get CastException or simple nothing. If somebody knows how to deal with it,Code...
View 1 Replies View RelatedI use a ksoap2 lib for communicating from android client with SOAP web service. Great job was done by ksoap team, but the problem is, there is no any good example how to use it correct in different aspects. For instance I get in soap response following data: It's a complex object, or rather a collection of Status Setting objects. When I try to get a property of SoapObject it's only 1 property with all that data as a string. It can't be parsed as json too. Unbelievable that nobody met same problem regarding to popularity android is gaining. Would be very cool to know if somebody solved this issue and how.
View 2 Replies View RelatedI add to system a lot of POIs via addProximityAlert. When I have got the alert, I don't know for which setting has occurred.
The only Extra that is passes is the 'entering' flag as it is described in the documentation.
How can I know that?
After the answers here is the working code:
code:....................
I managed to call a webservice using KSoap2 in android but I can't find a way to parse the response...
So here's what I receive from the webservice
CODE:......
And here's the code I'm using to call the webservice...
CODE:......
Is there any way to parse it "easily" without having to so through every property "manually"? something like a XML parser...
I am working on a simple application (studying purposes) which list all the files from a selected folder. On top of that I would like to have a search feature where the user can search for files (the code for that is already in place). Now, I was thinking about having the search running in the background somehow, whilst the user can still navigate, create folders, copy, sort and do other stuffs normally. When the search finishes the user would get a notification and then could click on it and go to that activity (It ideally should be the same ListView I already use for browsing the files, I would just need to update the Adapter there with the latest processed data after clicking in the notification). What's the best answer for that? Threading or AsyncTask?
View 4 Replies View RelatedCan anyone point me to a good example where a AsyncTask queries a local SQLite database and then updates the UI successfully. I have a database which I query using doInBackground... create a new custom SimpleCursorAdapter (overriding onViewBind), return the adapter (SimpleCursorAdapter), then in postExecute() create ListView adapter which is set to the the SimpleCursorAdapter, that was returned, then I set the listview adapter using SetAdapter(adapter);...
For some reason I throw an exception on fillWindow.java:200....
My application parse an xml file dans display data in a list view. On start of application i load data using an AsyncTask. A Progress Dialog is display during the load. This part works fine.A button in the application make it possible to reload the data. I would like to run the AsyncTask but the sytem say i can't alter view in other thread. I have also read an AsyncTask can't be run another time So i would like to know what is the best way to do this and not to have the "application not responding" message.
View 5 Replies View RelatedI know this is not how an async task should behave but my question is how to "block" the user while executing it.My need is the following: I have my own backup/restore process and I have an async task to run these two actions. The backup is fine, I can warn the user when the backup is done and that's just fine But my problem is about the restore process. When the user click on restore he shouldn't be able to make any change in the application (and anyway don't want to because he would lose all his changes).I understand that having the user blocked while restoring (or maybe with a progress bar) is not a best pratice but I do not see any other possibility in this context.
View 7 Replies View RelatedI know how to use AsyncTask in a standard manner to manage operations that are in the background in relation to a UI thread.However,I want to run a task in the background which might run for a very long time under certain circumstances. In these cases, I would like to force the background task to fail if it runs for an excessive amount of time.I know that I can invoke the "get(long timeout, TimeUnit unit)" method of AsyncTask in my UI thread in order to terminate my background task if it runs too long. However, in that case, my UI will block while this "get()" command is waiting.There are probably other drawbacks to directly calling "get()" in this manner, not the least of which being an evil interaction with the "done()" method of AsyncTask's contained FutureTask object, which itself is calling "get()" at least this is what I see when I look at the source code for AsyncTask.
View 10 Replies View RelatedI have an activity that needs to do some stuff in the background. When the background is done, I want it to load a new activity.I can successfully kick off the async task and using using ViewSwitcher I can show a nice progress dialog.However, when the user hit 'back' or 'close' from the new task, I want them to see the main screen of this task again. So, I use the showPrevious() after I start the new Activity, but I see the screen switch from the loading window back to the main window BEFORE the new Acitivity is launched.How do I get it to switch after the new activity, or when they come back from the new activity?I tried onRestart() and onResume() but both of them seem to give me a view of -1 that I couldn't do much with.
View 2 Replies View RelatedI'm running a network service within an ASyncTask. I want to be able to time the task, and after a certain period of time interrupt it.Is there a simple way to do this? Basically, when the doInBackground() methods starts, I want to say "If it hasn't completed in 30 seconds, do something else".
View 2 Replies View RelatedI'm developing a game based on SurfaceView and a game thread for the whole game thing.Now I want to do some HTTP requests triggered on events inside the thread. They should of course be asynchronous, so the game doesn't stop. I found AsyncTask to be a neat way to do this but I'm having trouble implementing this at the moment. Maybe I misunderstood the concept of AsyncTask,I don't know it just drives me nuts as I read docs and blogs and still I don't get it. So sorry if that's a dumb question but I'm mad of thinking about it.
View 4 Replies View Relatedwhile debugging and app that uses AsyncTask to record audio and update UI I noticed that everytime that an AsyncTask object ends running (finishes doInBackground and onPostExecute or on Cancelled it´s thread stays alive (running status).At least for me that should not be the behavior of the class since the doInBackground task may not stay running forever (as an example the android manual says that a status bar should be updated by an asynctask, and it won´t last for the whole app running time).Is there anything I´m missing, as a method to destroy it, or should I just ignore and keep creating threads as I need and the VM will handle them as it needs resources?
View 9 Replies View RelatedWhen I try to compile to following code, I get two errors:
Description Resource Path Location Type
Syntax error on token "void", invalid Expression AsyncTask.java /AsyncTask Project/src/org/me/asynctask line 19 Java Problem
Description Resource Path Location Type
The type AsyncTask is not generic; it cannot be parameterized with arguments AsyncTask.java /AsyncTask Project/src/org/me/asynctask line 25 Java Problem
CODE:............
Obviously AsyncTask IS a generic (http://developer.android.com/reference/android/os/AsyncTask.html#execute so why do i get those errors?
In order to get XML data from a server repeatedly, I'm attempting to use AsyncTask and Timer as per Mark Murphy's suggestion. I get the following error:01-07 16:11:26.705: ERROR/AndroidRuntime(729): Caused by: java.lang.Runtime Exception: Can't create handler inside thread that has not called Looper.prepare()I'm using SDK 1.5 with Eclipse on Windows.I've looked in documentation, on StackOverflow and in the Android Developers group, but I'm not clear what's causing the error or how to fix it.I can get the data once - i.e. without Async and Timer - and parse it via SAX without problems.s: I'm quite new to Android.
View 5 Replies View RelatedMy program was going wonderfully. It is a search engine that connects to our back end database by sending Get requests to our server and displays the results. I've managed to get it to query my server and back end database, return results using JSON, return the first headers and pour them into a ListView widget in the main activity. Then when the user clicks on one of the headers it then sends another query from a sub-activity. It then parse those results and format them neatly into a WebView embedded into the sub-activity.
All this works perfectly. That is until I come to make a second query on the main activity. Listed below is my stack trace of where the error happens. I think I know why this is happening, but obviously not clearly understanding it.
I think it is because I am trying to call AsyncTask again. I remember reading that the AT can only be called once, but I presumed quite wrongly that this meant you can not do concurrent calls. I thought that once an AT had done it's task it was cleared and then could be called again, but this does not seem to be the case. Is it because of AT attempts at more than one call ? If so, would I be better changing that section into a Handler with a Runnable on the main activity?
-----Stack Trace----
CODE:.....................