Android :: NotifyDataSetChanged Not Working As Expected
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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Jul 5, 2009
I'm developing an application wich has a location push service that start at boot. The main responsability of this service is very simple, just inform the location of the phone based on the *requestLocationUpdates* parameters. I don't care if it's using the network or GPS, obviuosly I'd prefer the most accurate one, but if the GPS is turned off, I don't mind to receive the network less accurate location fix. My problem is that the service isn't working as I expect, since I deploy the app on my HTC Magic, and after a lot of miles driving my car, only the first fix is shown, but no one else. Here some snippet of my service (BTW, I've checked with DDMS that the service is launched at boot):
CODE:..................
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Oct 12, 2009
This is continuation to the question I already asked a while back. I've been offered a solution which is not really working. Anyway - here's the problem/question. Code...
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Nov 22, 2010
I set locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 60000, 0f, this);
It has an odd behavior, locationChanged gets called every second instead of any time close to 1 minute. Secondly, locationChanged gets called every second for like 10 seconds, then stops completely, the gps satalites icon disappears, then only resumes again when the screen returns from display timeout.
what's wrong? I'm currently on android 1.5.
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Nov 20, 2009
When I set my HTC Hero to sync with exchange "As Items Arrive", the phone is constantly synching and therefore my battery drains. Even when I turn off the phone, the phone uis still awake since it is constantly checking/sync-ing with exchange. I was under the impression that by selecting this type of sync, the items would be "pushed" to the device rather than the device constantly checking if there are new messages, contacts, or calendar eventsto sync. Is this expceted behaviour, or is there some other tweak I need to do? By the way, I just updatedmy phone yesterdey to the latest firmware, and the issue still persist.
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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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Nov 12, 2010
I have an application that runs in the background, and displays an error message via the notifications system. This notification has a pendingIntent that leads back the the app's main screen. On this main screen, I have set launchmode="singleTask". As I understand it from the Android Dev Guide, this should mean that my main activity will only ever have one instance.However, if the user is viewing that activity at the time (or another one within the app), and goes and touches the notification to clear it, it goes ahead and puts another copy of the activity on the stack, so if I hit the back button, it will return to the main screen again (from the main screen).
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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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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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Dec 27, 2009
I have a service that gets updated every x minutes depending on the user preferences. This service connects to a web service and pulls some data. If during an update the user has no connection I register my receiver and start listening for changes (ConnectivityManager.CONNECTIVITY_ACTION), the thing is that onReceive () only gets called on every update instead of firing onReceived as soon as I plug the connection back in. Have I understood the concept of Broadcast Receiver wrong? Is it not suppose to send a notification as soon as it detetcs a change in the connection?
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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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Aug 16, 2010
In the android manifest on the first line "" I'm getting an error marker (with a red X). When I mouse over the red x it says- "Manifest attribute 'minSdkVersion' is set to '2.1'. Integer is expected."
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Jan 22, 2010
I have a simple LinearLayout with one TextView and one ImageView. I want the text in the TextView to be aligned to the right, but the result show that the Text was aligned to the left.
Is there anything wrong with my layout xml?
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 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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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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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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Mar 17, 2010
Help me in resolving the below issue. I have three image buttons on screen. All these three buttons controlled under ontouchlistner as below. My problem is, as it is under multi touch event handler like above, it does not detect when touch all three button at a time to try to produce multi touch effect, instead it detects only one imagebutton touch at a time even though i touch all three image buttons. As i am developing this project on Android 1.6 SDK, is there any problem accessing my requirement(multi touch) (or) it is a known issue? I am hoping that, when it works for single button touch, why shouldn't it work when clicking three imagebuttons at a time to produce three logs printed as per my above code? Code...
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Oct 28, 2010
Is there a way to ensure that my Android UI will display as expected across different phones ?
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Oct 19, 2010
I'm requesting data from my server and receive a string in the form of 2|bit.ly|1||1| and | should be the separator. I thought the following piece of code should do the work
BufferedReader br = null; ...
br = new BufferedReader(new InputStreamReader(inputStream)); ...
String line; String[] columns; ContentValues values;
while((line = br.readLine())!=null) { columns = line.split("|"); ...
}
But after the line.split("|"); the columns contains 15 elements instead of expected 6. Taking a closer look at it's content reveals that each character in the string was stored in one array element. The code coming from server isn't encoded in any way in in the example I use only ASCII characters appear.
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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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Dec 5, 2009
What kind of download speed should I expect with my Droid ERIS? Using my 802.11g wireless router I get around 2mb/sec according to spreedtest.net. I get around 1mb/sec using 3G. My laptop gets around 15mb/s over my 802.11g network. I'm guessing that the difference might be because my laptop has 4gb ram and a dual core and the ERIS doesn't.
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Aug 10, 2010
I have come to the conclusion that vzw aborted the ota on the 1st 2.2, and not many people have gotten it. It seems at least on this forum that everyone has 2.2 via a forced update. Very few people have chimed in that they got a ota.However, given that vzw is releasing the droid2 on Thu the 12th, I would think that this is going to have the newest froyo, not the version released ota that everyone forced with. Correct thinking?
If that is also true, then shouldn't we be seing something coming out ota for us 2.1 droid 1 users very shortly? anyone have any dates?
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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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Jun 2, 2010
I've posted a bigger chunk of the code below. You can see that initially QUOTE was procedural- coded in place. I'm trying to learn how to use declarative design so I want to do the same thing but by using resources. It seems like I need to access the string.xml thru the @R.id tag and identify QUOTE with that string value. But I don't know enough to negotiate this.
CODE:.......................
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Nov 9, 2013
I cant sync my google accounts ('sync is currently experiencing problems, it will be back shorly)
Google maps says 'no network connection'
Play store says 'server error'
Gmail says 'waiting for sync, your emails will appear shorly'
Sounds like my internet is broken? ITS NOT. whatsapp and opera mini, web browser is still working 100% and able to connect
I have tried:
turning sync of and on
clear the cache of various google apps
turning the phone off and on
The last action I did before it worked was to uninstall the 'microsoft outlook app'.
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