Android :: Update ListActivity When List Data Changes
Oct 8, 2009
i want to know how to refresh the ListActivity when i change/add data to the list wich is dispayed.i first thougt the ListAdapter would know when the list is changed but when i add elements to the list there is no update, only when i close the activity and reopen it i see the changes.so i searched for any update() refesh() or something like that method but there is none.so it seem i didnt get the concept, can someone help me please?
View 2 Replies
Jun 21, 2010
I'm trying to display an image before the list in a listactivity. If I put an ImageView before the ListView, then only the list is displayed..
View 1 Replies
View Related
Oct 29, 2009
What is the best way to display a database queries results on the screen using ListActivity? I need the db queries to run in the background and I also need to be able to make different queries and refresh the screen according to the query result. I am using the ListActivity class with a SimpleCursorAdapter in order to display the db queries result on the screen. At the moment, I am doing the db queries at the background using AsyncTask, when getting the results I want the list to be updated immediately, but I can't find a good way to do it. It worked only when I used the changeCursor(cursor) function to set the adapter to a new cursor with the new results. But I don't think this is a good solution since it seems to stuck the UI for a while. I also found some posts about notifyDataSetChanged() but I am not sure if/how/when I should be using it with a SimpleCursorAdapter to make the view refresh.
View 2 Replies
View Related
Mar 18, 2009
I have a simple ListActivity midlet. It populates the list using a String array which is passed to the setListAdapter method. code...
However my question is, how is it possible to modify the properties of the list so if I know "etc" and "dev" are directories and I want to change the text colour to reflect that it is a directory how can I do this ?
Can anyone point me to any API's ?
View 2 Replies
View Related
May 31, 2010
I would like to write a rather simple content application which displays a list of textual items (along with a small pic).I have a standard menu in which each menu item represents a different category of textual items (news, sports, leisure etc.).Pressing a menu item will display a list of textual items of this category.Now, having a separate ListActivity for each category seems like an overkill (or does it?)
Naturally, it makes much more sense to use one ListActivity and replace the data of its adapter when each category is loaded.My concern is when "back" is pressed. The adapter is loaded with items of the current category and now I need to display list of the previous category (and enable clicking on list items too)
Since I have only one activity - I thought of backup and load mechanism in onPause() and onResume() functions as well as making some distinction whether these function are invoked as a result of a "new" event (menu item selected) or by a "back" press.This seems very cumbersome for such a trivial usage.Am I missing something here?
View 1 Replies
View Related
Jan 30, 2010
I have a working ListActivity class. Each of the list item consists of an ImageView and a TextView. However, when I try to replace the ImageView with ImageButton, The list becomes unselectable. The onListItemClick or any other function no longer get called when press a list item (Although the track ball can still focus a list item, but nothing more can be done). I have searched the forum and also the internet and failed to find any such working example, apart from one guy reporting a similar problem but with no answer.Code...
View 6 Replies
View Related
Jul 1, 2010
I got a ListActivity. I update the activity using onContentChanged() API. My problem is that each time I call the above API the list scrolls to the top. Is there any easy way to turn this "feature" off?
View 1 Replies
View Related
Dec 11, 2009
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_list);
mDbHelper = new MyDbAdapter(this);
mDbHelper.open();
fillData();
registerForContextMenu(getListView());....................
The date is actually stored as an int in the SQLLite database, and thus it displays as an integer. Does anyone know a way to create a date from the int so it doesn't display as 1216544611 (or whatever) but as "12/11/2009 11:32"?
View 2 Replies
View Related
Jan 4, 2010
I update a value in my Database in a Listview using a Context Menu. The code so far seems to be ok. But everything i try to make the update visible in the View failed. Anyone can point me whats wrong there ? I use a ViewBinder to map the Layout for each row.Code...
View 7 Replies
View Related
Nov 3, 2010
I have lot of lists: for example: Categories, and subCategories, in my case some Categories has subcategories, So What I want to do, is if the categories has subcategories I want to clean the recently list and show the subcategories,(This can be solved by creating new activity for only subcategories, but I would say that the most of the code woyld same)I wounder how can I updoate list whit new data?If possible to add some animation when clicking, so the list goes to left when clicking, and showing data comes from right,
View 1 Replies
View Related
Jul 2, 2010
Anyone seen a general list or data manager app for Android? Not looking for a to-do list or task list - but a general list manager where I can define my own tables and fields, edit data, filter, sort, etc. Syncing to a PC app would be great, but I don't really expect that.If anyone has used Listpro fom Ilium Software, on Palm or Win Mobile - that's what I am looking to replace.I may end up using Excel spreadsheets with Documents to Go from Dataviz - and some general sync tool for PC to phone data sharing - but Listpro was so good, I'll miss it!
View 4 Replies
View Related
Aug 1, 2010
I have got list that is filled with data from internet.
Datas are downloaded in chunks. At the end of the list next portion of data is downloaded and added to the list.
I'm detecting list end with help of onScrollListner:
CODE:........
I would like to addLoading... row when datas are being downloaded. Something similar to Gmail loading row at the end of the list.
I know that I can hack adapter.getCount() to return size + 1 and force adapter.getView to display loading... at the end of the list.
How can I do that in more elegant way?
View 1 Replies
View Related
Apr 29, 2010
I have been searching for a way to get the json data from a URl (for example: http://search.twitter.com/trends.json) and display it in a listview. Couldnt get a perfect example to get it done. Can anyone plz help me out by getting the solution and providing a good example of how to do it...
View 2 Replies
View Related
Apr 30, 2010
I want to retrieve the data from the url(http://www.sumasoftware.com/ alerts/GetAlerts.php) and parse the data. The data should be inserted to a list view showing alert text and the corresponding date. I have done this using a text view. But cant figure out how to display using list view... Plz help me out. I'll be grateful if anyone could provide some sample code too...
View 12 Replies
View Related
Nov 18, 2010
In the scenario that I made up a user chooses an application and and I offer him/her the available pieces of data to operate on. I know that the possible data type for an application is specified in its manifest file and I suppose that this information is available, but I have some difficulty finding out what the data content type for application is?
View 2 Replies
View Related
Apr 23, 2010
I juststarted programming in android a few weeks ago, so I am not entirely sure how to deal with listing values. I have some questions regarding displaying data sets from db in a list. Currently I have a cursor returned by my db points to a list of rows and I want display 2 columns values in a single row of the list.
The row xml looks like this:
CODE:...............
so I was thinking using simplecursoradapter which supposedly makes my life easier by displaying the data in a list. However that is only true if I want to display the raw data. For the purpose of my program I need to do some computations on the raw data sets, then display them. I am not sure how to do that using SimpleCursorAdapter.
Here's how I display the raw data:
CODE:.........
Is there a way to do computation on the data in those rows before I bind it with the SimpleCursorAdapter? I was trying to use an alternative way of doing this by using arraylist and arrayadapter, but that way I dont know to how achieve displaying 2 items in a single row.
This is my code for using arrayadapter which only display 1 text in a row instead of 2 textviews in a row:
CODE:.......
It's very obvious that it only displays one textview in a row because I set the second arrayadapter overwrites the first one! I was trying to use R.id.text1 and R.id.text2 for them, but it gave me some errors saying 04-23 01:40:58.658: ERROR/AndroidRuntime(3309): android.content.res.Resources$NotFoundException: Resource ID #0x7f070008 type #0x12 is not valid.
View 2 Replies
View Related
Oct 29, 2010
In my apps preferences screen, i want to pop up a dialog that shows a list of checkbox items that are dynamically generated.
How does one do that and also, how does one get the checked values? I have made custom dialogs in the past, but for some reason my brain wont function today ..
View 2 Replies
View Related
Feb 3, 2009
I have a list. Which will first show 10 items, user would be able to do pagination with click pagination button.The list is extended from listActivity, and the list adapter is extends from BaseAdapter .But how to update UI when I get next 10 items back?
View 7 Replies
View Related
Nov 27, 2010
data monitor widget missing after update to 2.1-xperia x8...any ideas?
View 1 Replies
View Related
Jan 18, 2010
I am developing one application which fetches the list of data/images from the server and shows on to the device. When I change the orientation, press Back button after doing it for 4-5 times app gets crashed. I am handling orientation change within activity itself and not setting the new view.
[Code]
View 8 Replies
View Related
Feb 1, 2010
I need to be able to scroll through a list with (up to) 20K rows, backed by a cursor on a read-only db. Testing 20K rows on a G1, the query takes approx .02s regardless of table size, while binding the adapter to the list takes 4.5s. Note that this is before the view calls used in rendering. What makes the binding delay more troublesome is that it blocks the UI thread, and is incurred on every rotate. Combine these, and doing a rotate just after starting the bind results in a delay up to 9s.
I tried lazy loading with a base adapter, but that hits the same delay in the underlying cursor.getCount(), and the overall user experience isn't ideal. I also considered using an ArrayAdapter, adding synthesized objects from the cursor rows, but then I'd incur the overhead of creating up to 20K objects (not to mention the additional memory requirements).
View 18 Replies
View Related
Mar 9, 2009
Is is possible to specify data in xml resource file and initialize ArrayList from it? I am looking for a way to use the ArrayList with a SimpleAdapter to bind to a ListView. I am wondering if there is a way to specify my data in xml resource file and init ArrayList from it.
View 6 Replies
View Related
Oct 2, 2009
How to load data in expandable List Adapter through Scroll .
Means I want to add data as per Scrolling in Run time.
View 1 Replies
View Related
Dec 15, 2009
So my problem is that I've written a function that takes two Doubles, two Int, and a Calendar object on Android (Java). I believe the class provided to allow it to run in a separate thread, AsyncTask, accepts only one type of Object (but allows multiple) as an argument so I figured I might be able to put it in a List or a Linked List or something. Is there such a type that allows multiple data types like that (Double, Double, Int, Int, Calendar), or would I have to create my own object class? I'm a novice programmer so less complicated is probably better, but I'm interested in the best solution as well. What the function does is take a location (double latitude, double longitude), a couple options as integers, and a Calendar Object. It takes the location, options, and date then returns a Time object of the sunrise (or sunset, depending on the options) for that location. and I understand it would probably be best to create a special object class and just pass that, or override the background thread class, but I'm pretty new to object-oriented programming so the less overhead the better (for now). (Update) After a lot of work, it ended up being easier making a data-type class and just using that. The right way turned out to be easier in the end. Who'd a thought.
View 3 Replies
View Related
Aug 30, 2009
How can I create a list Array (the list display First Alphabet when scroll) with the cursor data?
View 1 Replies
View Related
Sep 7, 2010
I have a list that gets refreshed every 2 seconds via the Handler postDelayed() method.Every 2 seconds an AsyncTask is run that makes an HTTP GET request, turns the JSON into a list of objects, then sets the ListAdapter.My problem is that every time the task completes (so, roughly every two seconds) my list jumps back to the top, even if I have scrolled down to the middle or bottom of the list. This would be very annoying to the end user, so I need the list to update in the background, as it's doing, but the current view of the list to not jump back to the top at the completion of the AsyncTask.I can include any more code needed. I'm somewhat new to android development, so I'm not sure what is helpful to others.
View 1 Replies
View Related
Jun 24, 2010
From everything that I've seen and have been reading, I'm apparently supposed to add all my OverlayItems in the constructor, then call Populate().The problem I have conceptually, is that if I'm pulling these items from a database (fed by a web site), then when exactly do I update the items?Also, it seems to me that it's a waste of resources to feed it all the items in advance instead of the ones pertaining to the current location... This seems to be the perfect case to use a ContentProvider, but I don't see anything indicating that one can be used with either ItemizedOverlay or anything else related to the Google Maps API.
View 14 Replies
View Related
Aug 3, 2010
I am planning to store a password in my Native app (Android and iPhone). Should I store them after encrypting it ? or can I store it without any encryption? Are they really secure?
View 3 Replies
View Related
May 16, 2009
I have two cursor, one of them from contact content provider, other one from database. id fields are sycnhorinzed.i want to show them in same column with two row in list. i m think that i have to use simpleCursorAdapter, because arrayadapter and other adapters can not show two cursor in a list.
CODE:..........
So my list is not refresing/updating altough all cursors all results are updating.
View 2 Replies
View Related
Sep 16, 2010
I have a list (ListView) which displays news items. They contain a image, title and some text. The image is loaded in a separate thread (with a queue and all) and when the image is downloaded, I now call notifyDataSetChanged() on the list adapter to update the image. This works, but getView() is getting called way to often now, since notifyDataSetChanged() calls getView() for all visible items. I want to update just the single item in the list. How would I do this?Problems I have with my current approch is that the list is slow and I have a fadein animation on the image which happens every time a single new image in the list is loaded.
View 2 Replies
View Related
