Android :: ListView Not Getting Updated On Calling NotifyDataSetChanged()
May 26, 2010
I've created a custom listview which looks the twitter timeline and contains posts. The following function gets a list of posts from server, parses them and adds them to the list used to populate the listview.
CODE:.....
After calling this function, the list adapter was notified of change in data set by calling
CODE:...............
in the main thread. But the listview doesn't updated. For trail purpose I added a button on top of list view and called the populateTimeline() again and then notifyDataSetChanged() when the button was clicked. Surprisingly all the posts pop up in the ListView this time. What should be done so as to update the listview without the button click?
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Oct 7, 2010
I have a ListView that I'm binding to an adapter. The adapter is a protected member of my main class. I have a listener thread that receives data and updates the source list for my adapter. When I call the adapter's notifyDataSetChanged() method, an exception is thrown:
Runtime Exception: PhoneLayoutInflater(LayoutInflater).inflate(int, ViewGroup, boolean) line: 322
I've read that the notifyDataSetChanged() method has to be called on the UI thread, and I'm doing that. In fact, just to be sure, I even update the ListView's data source on the UI thread. All I do in my listener thread is update a protected member that houses the data. Here's an example of what I'm doing (note that I don't have the part of the code that calls the AsyncTask, but it's fired from a listener):
CODE:............
Does anyone have any pointers or ideas as to why I'm getting this exception? Any help is much appreciated.
Here are the layout files, as requested:
main.xml:
CODE:....................
row.xml:
CODE:...............................
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May 18, 2010
I have this scenario
onResume of an activity:
CODE:............
Adapter has been defined as:
CODE:.............
And the onContentChanged event is not fired, although the onResume and the call to the adapter is issued.
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Aug 30, 2010
CODE:........
My array clearly has been updated, and I can see the change when my app starts, but why doesn't it update in this method? The code enters this method.
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Jun 21, 2010
On a click event I create a thread and start a long-running operation based on this method. After the long-running task is completed, it does a callback to another method, which does a post to the handler:
@Override
public void contentSearchModelChanged(Model_ContentSearch csm, ArrayList<Class_Reminder> newRemindersList) {
remindersList = newRemindersList;
mHandler.post(mUpdateDisplayRunnable);
}...........
This works beautifully when I do this normally. However, if I change the orientation while the long-running operation is running, it doesn't work. It does make the callback properly, and the remindersList does have items in it. But when it gets to this line:
r_adapter.notifyDataSetChanged();
Nothing happens. The odd thing is, if I do another submit and have it run the whole process again (without changing orientation), it actually updates the view twice, once for the previous submit and again for the next. So the view updates once with the results of the first submit, then again with the results of the second submit a second later. So the adapater DID get the data, it just isn't refreshing the view. I know this has something to do with the orientation change, but I can't for the life of me figure out why. can anyone suggest an alternative method of handling threads with orientation changes?
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Aug 10, 2010
I must be missing something simple here.I've searched around but don't think my search query is touching on the right topics to yield results. Anyhow, what I'm after is running through the array of data I bind to a ListView after a "Submit" button has been clicked.
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Aug 29, 2010
Im using ListView to to show some custom data, once data is updated in the adapter i call notifyDatasetChanged(), so the view will get updated, all of this works well, my issue though is i would like to run an animation once only on items that got changed when the adapter was updated. currently i keep a copy of all the changed objects and i tried to animate the correct items through the getView() call.
However if i do it only once for every getView call then i see no animation most of the time on items that changed. if i continue to do so in successive getView calls i see animation on items that don not change as well and also the ones that changed get animated again and again.
Im guessing sometimes android calls the getView() for other reasons than showing the generated view immediately, and thats the reason it doesnt work if i do it once.
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May 4, 2009
I have a ListView whose position should be changed automatically along with the data. So, when the adapter's data has changed (adapter is calling notifyDataSetInvalidated), I'm calling setSelection. This has no effect. If the call to setSelection is done later (e.g. in a click handler) it is working.
The second problem is, that the ListView maintains the scroll position of the list although the data is completely invalidated, that makes no sense IMO.
It looks like a call to layoutChildren before the call to setSelection does help in this case, but layoutChildren is protected.
What is the correct way to do this?
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Sep 8, 2010
I'm trying to use in my Android Application the notifyDataSetChanged method for an ArrayAdapter but it doesnt't work for me.
I found as answer here, that notifyDataSetChanged should run in the main thread, but there was no example for that.
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Oct 20, 2010
I want to refresh my expandablelistview, but it seems there is no way to use notifyDataSetChanged()? how can i refresh my expandablelistview?
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Jun 16, 2010
I have a strange problem with one of my ListActivity. I have overrided the default ArrayAdapter in order to customize my list. I have then filled the adapter with an ArrayList.
If I insert an element on the list and then call notifyDataSetChanged() on the adapter everything works fine.
But if I insert an element at the END of the list and then call notifyDataSetChanged(), the new element doesn't appear ...
And finally if I override getCount() on my adapter like this :
CODE:...............
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Sep 8, 2010
I write following application:
There is an AutoCompleteTextView field as Adapter I'm using ArrayAdapter with ListArray the ListArray consists of some constant string item and one item, which will be changed dynamically everytime user typed something in the field
I took TextChangedListener to update this last list item. But it seems, that update occurs only once.
I add a bit code of me. May be somebody can show me, what did i do wrong.
CODE:.................
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Jan 25, 2010
The problem is that notifyDataSetChanged() is not firing up getView() of listView class.
I have an activity class in which i have Gallery Adapter and custom List Adapter (extending base class and overriding getView). What i want is, if i select any picture from gallery then, the list should get updated (dont worry about the data source now, as i am using static images for gallery and static string array for listview). After getting onClickevent from gallery i am calling notifyDataSetChanged via listView Adapter Context so that getView of listView should be called and i can supply another static string array to change the list, but getView of listView is not being called.
If i call notifyDataSetChanged from onClickEvent of listview, then getView of listView is being called. How shall we use notifyDatasetChanged to update the listview using event from another adapter.
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Aug 4, 2010
I have a doubt that what is the difference between adapter.notifyDataSetChanged(); adapter.notifyDataSetInvalidated();
Because when i used both one by one, both worked exactly same. Please let me know what is the exact difference between these two.
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Oct 18, 2010
I have a list view which I'm trying to refresh to update it self when i add an element to the underlying array list.
Here is the code snippet:
CODE:.....
The arrlEvents is the underlying arraylist with the events, and im adding one event, trying to update the list view with notifyDataSetChanged(), but it doesnt work.
Here is the source code for the adapter:
CODE:...............
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Apr 26, 2010
I've a question about ListActivity & ListView & CursorAdpater. The problem is that my listview isn't updating when I call notifyDataSetChanged method from adapter, after I delete an item from database.
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May 19, 2010
An OnItemClickListener for a ListView has the following method:
CODE:.......
I'd like to have the adapter behind the ListView refresh, and I believe this is done through the use of:
CODE:.........
How do I use the parent parameter in the onItemClick method to do this? So far I've tried:
CODE:.................
This throws an error because the object returned is of class HeaderViewListAdapter, which for reasons unknown isn't a subclass of BaseAdapter.
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May 27, 2010
I have a very simple application. There is a refresh button, everytime it is being clicked, the adapter will call notifyDataSetChanged() to update a ListView. However, I got IllegalStateException all the time.
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Jun 26, 2010
I would like to change text and back ground color of my Listview without building custom rows. Is this possible ?
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Jun 24, 2009
There must be a way to do this. How can you tell a ListView that has a header to not scroll it when the user scrolls the contents? I want it to stay in a "stuck" position so that the user can always see what column the content applies to.
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Sep 9, 2010
In my project i m parsing xml and i want to put it in xml list with in list.
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Jul 8, 2010
I have old version of my app installed in the G1, and then I copy the apk file of new version to the SD card. When I install the new version from SD card, it raises a error: 07-08 22:11:05.396: DEBUG/(1748): unable to unlink '/data/data/ com.android.packageinstaller/files/myapp.apk': No such file or directory (errno=2) btw: I do not want to uninstall the app, I just want to update the app when I install the new version of app.
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Jan 16, 2010
I hear that there was an update for facebook yesterday? so what is the latest version? is it still 1.1.2? the reason i ask is because im wondering if there is a way i can get facebook notifications to appear on my droids notification bar? I want to know if i need to download the other facebook clients like blabber or not. I saw something on Droudforums.net about checking a box for android for facebook under notification settings on the facebook main page, but that didnt help me at all.!
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Mar 25, 2010
The Facebook downright sucks. It's a poor implementation... often get errors when trying to post a comment. And having pics and notification links just link you to the web version is quite lame. WHEN can we expect a refresh of the Facebook app?
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Nov 3, 2010
FYI nothing groundbreaking but it has places and groups added but what i like most is that YOU CAN NOW REPLY TO YOUR NOTIFICATIONS INSIDE THE APP!
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Sep 27, 2010
I would like to know how to intercept the event that the apk has been updated in order to launch again my Timer. Indeed, I have a Timer wich is "scheduled AtFixedRate", but when my App is updated through the market, the timer is killed ; and if the user doesn't launch the App, the timer is not started (so my app becomes useless). How could I do to avoid it ? Is there an event to catch the "App updated" ? I searched, tried, but nothing.
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Mar 18, 2010
Need to have updated Google Sky Map
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Sep 9, 2010
Google maps have been updated to include navigation for walking directions and filter search result by distance or ratings.
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Aug 4, 2010
Follow the link for all the info.......
Facebook for Android Gets Another Big Overhaul | Android Phone Fans
In my opinion it's better....but still not great
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May 30, 2010
So a while back I saw a app that let you set your wallpaper to the public feed of a webcam. They had a big list of webcams you could use or you could add your own feed. There was one feed that was a view of the earth from a satellite, and you could watch the shadow creep across the planet as the day went on. I thought that was pretty cool, however can't find what app that was.
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