Android :: Can Pass Different Types Of Parameters To An AsyncTask
Oct 13, 2010
I want to implement a generic, thread save class which takes the RessourceId of an ImageView and the Url (http) where the desired image file is stored. It'll download the image and fills the src of the ImageView in the UiThread.
I thought AsyncTask would be the best thing for me. However I noticed that I only can pass one type of parameters to the doInBackground() Method. Like an Array of Urls. Is that true? What would u suggest me?
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May 23, 2009
This maybe a silly question, but I was wondering how to pass multiple parameters to AsyncTask
I have something like ,code...
I would like to pass in the 3 parameters , I am not sure (1) if it is possible and (2) what the syntax would be .
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Jun 19, 2010
I use an AsyncTask for loading operations that I implemented as an inner class. In onPreExecute() I show a loading dialog which I then hide again in onPostExecute(). But for some of the loading operations I know in advance that they will finish very quickly so I don't want to display the loading dialog. I wanted to indicate this by a boolean parameter that I could pass to onPreExecute() but apparently for some reason onPreExecute() doesn't take any parameters.
The obvious workaround would probably be to create a member field in my AsyncTask or in the outer class which I would have to set before every loading operation but that does not seem very elegant.
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Apr 19, 2010
Today I met a problem, I need to pass a ArrayList<MyClass> from an activity to another. I dont know what the Intent exactly do when I use putExtra to pass in an ArrayList<MyClass> object. I guess MyClass need to implement Parcelable interface, so I just did it. But still, it does not work. Maybe I need to create a Bundle and then use Bundle's putParcelableArrayList method to put my ArrayList<MyClass> object in, and then pass this bundle as parameter of putExtra to the intent. So crazy! I am lazy, I just want to pass an ArrayList<MyClass> object simply, is there a simple way??
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Oct 29, 2010
I am writing a class in Android that requires certain parameters from the class that calls its functions.
For Example my class is called "DoStuff"
DoStuff has 3 functions:
CODE:.....................
Is there a way for me to have canvas, tick and toggle implicetly passed to the "DoStuff" when I call on it's functions from somewhere else (that somewhere is unknown to DoStuff).
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Feb 10, 2010
When providing a user on a mobile, a link to an android application via a web page, it is possible for params from the url to be passed to the app being installed.
I'm guessing the answer is no - but it doesn't help to ask.
The reasoning being that it would be handy for some situations to have a generic app that pulls config information from the referrer.
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Mar 13, 2010
I can establish a connection using HttpUrlConnection.
My code below.
CODE:....................
Getting filenotfound exception. dont know why?
How to pass username and passwrod parameter to the url by code..
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Oct 15, 2010
what parameters do I pass to this function? invalidate(left, top, right, bottom) for use with google map on android ?
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Oct 13, 2010
This function runs on the UiThread, but it seems that doesnt mean it also has access to the activity context. Shall I implement to my AsyncTask a public Setter to pass the activity (as reference)?
protected void onPostExecute( Bitmap bitmap ) {
//following is underlined red due to missing context
(ImageView)findViewById(ResId)).setImageBitmap(bitmap);}
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May 23, 2010
Is it possible to pass the android market place parameters for later use for example: request id?
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Jul 28, 2010
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?
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Jul 13, 2010
I was just on there yesterday i go into browse tonight and now all of a sudden it says pass world invalid from last night till this morning i tried typing in the little letters they had and I cant read it so I go to the google site. I put the info in and it says sorry account has been terminated for terms and conditions I didnt even do any thing to violate them?
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Jun 17, 2010
I am working on an app that has multiple tabs. In the first tab the user will enter values. In the other tabs it will display the results of calculations based off of those values.
Like in tab 1, the user will enter "3" and "2". In tab 2, the program will add them and display "5".
In tab 2 how do I access the ints "3" and "2"?
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Apr 20, 2010
In requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); if I put time interval and distance as zero, will this work, or shall I need to give a value greater than zero.
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Mar 2, 2009
I'm programming an Activity that launches a second one through startActivity just like in the Forwarding example. The main difference is that I'd like to pass some data to the second Activity when starting it, for example an item selected in a list owned by the first Activity. I can't find how to do that. Am I missing something? I guess I do.
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Feb 17, 2009
I am trying the FaceDetector class using the code as shown in the following link: http://www.anddev.org/quick_and_easy_facedetector_demo-t3856.html Everything works fine as far as the activity drawing the bitmaps is concerned but I haven't had any success in getting Android to recognize a face. Has anyone tried this feature? Could anyone please help in understanding the parameters of the images to use or please post a link to some image that has worked for them?
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Dec 15, 2009
Im using ksoap2 to call web .net services. The call works just fine except when I pass paramaters. The passed paramaters are always recieved as null values by the web service. I dont know what the problem is, I hope someone can help.
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Oct 8, 2009
I want to use default Android credentials for specific phone to pass authentication test in Google Apps, but documentation is terrible :-(, and worst of all I'm a newbie. Anyone have a idea how to do it? There are some apache libs for it, but as I mentioned documentation is very weak. Here is reference to this class.
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Oct 6, 2009
I want to use default user login/pwd in my app. Do you know how can I have access to this data?
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Feb 18, 2010
This link describes how to search the Android Market for apps using various parameters:
http://developer.android.com/guide/publishing/publishing.html
I'm having a heck of a time figuring out how to format a link for my apps published by my company using this format. For searching by developer name, the doc says to use the following format:
market://search?q=pub:<Developer Name>
It also says it returns exact matches only. My publisher name is "Polyclef Software". I guess I'm wondering why Google can't make a market search feature that searches for substrings in the publisher's name, but aside from that, how am I supposed to format the link? Neither of the following work:
market://search?q=pub:Polyclef Software market://search?q=pub:Polyclef+Software
I've tried a number of variations now and nothing works.
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Jun 2, 2010
I have a HTTP GET request that I am attempting to send. I tried adding the parameters to this request by first creating a BasicHttpParams object and adding the parameters to that object, then calling setParams( basicHttpParms ) on my HttpGet object. This method fails. But if I manually add my parameters to my URL (i.e. append '?param1=value1¶m2=value2') it succeeds.
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Jul 20, 2010
I am trying to upload file to php server using following tutorial http://getablogger.blogspot.com/2008/01/android-how-to-post-file-to-php-server.html
I dont know how to add parameters like: userid="12312";sessionid="234" in it.
How to achieve this?
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Jan 19, 2010
I am developing an app that uses the phone camera, and I want to set the Flash Mode, if flash exists. From documentation, it looks like I need to call Camera.Parameters.getFlashMode() and check if it returns null to determine if flash exists. Note: getFlashMode() is supported from API level 5
However, when I try to run this app on a phone with cupcake, I get an error: 01-19 14:02:43.404: ERROR/dalvikvm(18891): Could not find method android.hardware.Camera$Parameters.getFlashMode, referenced from method ...
I tried to call this code based on SDK version as follows, but that does not work either. Looks like there is a class verification thats fails at init:
CODE:............................
So now I am wondering if there is any other way to check if flash exists? or is there a way to conditionally compile code based on mSdkVersion?
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Apr 29, 2010
I have the following xml object representing a ImageButton I try to inflate it and add it to a TableRow with the following code : Ok so I noticed that it didn't look as expected, so I fire up the Hierarchy Viewere and noticed that the ImageButton's actually have an layout_width = FILL_PARENT instead of WRAP_CONTENT, also the layout_gravity is NONE and there is no padding to be seen. Do, am I inflating it wrongly ? Or is maybe the new TableRow.LayoutParams() part doins omething wrong ? Code...
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May 10, 2010
I made the connection between my service WCF and my app android. But i'm wondering if u have ideas about using complex types (classes created on the server side). should i implement the serialization process? or should i juts create the classes on my client side(android)
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Aug 20, 2010
I have read a lot of stuff about launching Google Maps in Android. That's pretty easy:
Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
The problem is that the map is shown at a high zoom level and there is no marker on the map. So, if the user move a little bit or something happen, the point is lost. Is that possible to add a marker like this:
http://img.skitch.com/20100820-da3n4r7h5xbsu6bsx4p4ujjghc.jpg
or like this:
http://img.skitch.com/20100820-qg7k2m5wtwm3j5phphrgc8tb53.jpg
So I can be sure that even if the user move the map, he will be able to find this place again.
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Oct 7, 2010
I'm trying to use the camera in an Android app using the 1.5 API. I want the camera to flash for every picture. However, when I looked at the API for camera.parameters, the setFlashMode() method is only supported for 2.0 and higher. Yet my Cliq XT, which runs 1.5, has a flash that I can set in the menu - I take this to mean there is a way to do this for the 1.5 API, though I was unable to find it.Does anyone know how to set the flash mode using the 1.5 API?
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Aug 4, 2010
I am trying to do a Contacts search on Android using Contacts Contract. I would like to search on multiple parameters, e.g. - Where name = myname AND email = myemail AND nickname = mynickname, etc. I have it working w/ just name, but need the syntax to add email and nickname as search params. I know they are stored separately from display name & have a different format. The code below is what is working for the search by just name. How can I add to the selection variable to also search by email and nickname? CODE: String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" + ("1") + "'"; selection += "AND " + ContactsContract.Contacts.DISPLAY_NAME + "= '" + cp.name + "'"; Uri uri = ContactsContract. Contacts.CONTENT_URI; String sortOrder = contactsContract. Contacts. DISPLAY_NAME + " COLLATE LOCALIZED ASC"; Cursor myCursor = mApp.managedQuery(uri, null, selection, null, sortOrder);
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Sep 20, 2010
I want to get a set of Views to redraw after I change some drawing parameters. I'm calling invalidate() and forceLayout() on the parent of the Views but nothing happens. If I rotate the screen then the Views redraw correctly using the new parameters, as you would expect. What else do I need to do to get the Views to redraw?
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Jul 21, 2010
So Im trying to add an imageview to my current xml design - and its working decently. Now my main problem is that I cant seem to find a way to set the attributes for the image like where it needs to be displayed etc.
RelativeLayout mRelativeLayout = (RelativeLayout) findViewById(R.id.board);
ImageView i = new ImageView(this);
i.setImageResource(R.drawable.blue_1);
i.setAdjustViewBounds(true);
mRelativeLayout.addView(i);
setContentView(mRelativeLayout);
i tried messing around with setlayoutparams but got absolutely no clue what to do with it.
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