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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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.
I want to refresh my expandablelistview, but it seems there is no way to use notifyDataSetChanged()? how can i refresh my expandablelistview?
View 2 Replies View RelatedI 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:...............
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:.................
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.
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:...............
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:...............................
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.
View 2 Replies View RelatedAn 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.
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?
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.
View 1 Replies View RelatedCODE:........
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.
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.
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?
I am New to the android ,what is the difference between android sdk 1.5 and android sdk 2.0
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