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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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:.................
I have an Android app that has both CursorAdapter based ListViews (backed by sqlite) as well as custom BaseAdapter based ListViews which are built on the fly from JSON pulled down from a server.
The data displayed in both is identical - an image and a couple of TextViews. My Cursor-based ListView has 3000 rows, the JSON-based ListView has about 30. However, scrolling down the list is significantly faster for the Cursor-based adapter. For the JSON-based lists, the data is all fetched before the rows are made visible. Images for both types of lists are downloaded on-demand.
I have both ListViews configured identically - both with fastScrollEnabled, scrollingCache and smoothScrollbar set to true.
I'm looking for leads on how to go about trying to figure out what's going on here and to potentially fix it so that the JSON-based ListViews as as fast as the Cursor-based ones.
Just looking at options for data updating affecting items in a ListView and have hit a few issues/queries.
There seems to only be notifyDataSetChanged() and notifyDataSetInvalidated(). While I could use notifyDataSetChanged() I am most likely in my case to have the scenario where additional data has been added and it seems inefficient to say the data has changed, which can only be resolved by calling getCount() and then getView() for all displayed items where knowing the data has been appended would just require adjusting the scrollbar. Is there some way to achieve something similar to this as the market seems happy populating dynamically in a manner that seems to reflect my desired behaviour (unless it just refreshes it all that fast).
Next question is the situation where the data behind just one item has changed. For instance I may wish to download icons in a background thread, but display available information with a placeholder icon. The best idea I've had so far is to store a map of indexes and views in my adapter which I can check against then call getView directly myself to have the view recycled with the new data. I'd just need additional logic to handle removing the map when the view gets destroyed or when it's recycled in getView. Either a bi-directional map (do we have one of those?) or two maps. Is the above likely to be my best approach or is there something built-in/better to get it done.
I'm using an autocomplete box, with suggestions provided by a SimpleQueryAdapter.Not sure if relevant, but only difference I see is that, both in the adapter constructor, as well as in runQuery(), I use a cursor returned by SQLiteDatabase#query obtained via an SQLiteOpenHelper instance.Should I be using on these cursors or not?If I don't use managed cursors, then I get "leak found" warnings ("database was created [sic] but never closed").
View 3 Replies View RelatedCurrently I'm trying to find an efficient way to handle the following scenario. Please comment on my current implementations and all feedback is greatly appreciated! I have about 7 adapters with data. This data comes from database and some come from xml queries over the internet which are kept static in memory. In my current implementation I re-use one ListView constantly to display this data as requested by the user. Here are the questions: 1. Is this a proper approach? or should I have a ListView for every Adapter?
View 9 Replies View RelatedI'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 am having two different data in two different adapters.
Now i want to merge both data in a single adapter.
is this possible?
How can I do that?
When I try to charge my Evo off of my usb charging adapter from my zune, it either A) takes ~3x as long to charge, or B) won't charge at all. Does the USB wall adapter that comes with the phone have something special in it? I'm drawing a blank... I mean even hooking it into the USB of my computer as charge only takes forever too.
View 9 Replies View RelatedI 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:...............
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 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.
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.
Alot of the MHL adapters are sold with "for Samsung galaxy S II" or "for Galaxy S3", but they look exactly the same, so are they model specific or can be used on Android phone?
View 2 Replies View RelatedI 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.
I have a ListView filled with twitter tweets. I made a custom Tweet class so I could store a special type number. So, I have the Tweet class and custom ArrayAdapter: Code...
View 1 Replies View RelatedI am trying to display the text from json in a list view.But my problem is that i cant figure out how to display them in list view. I also want to get only some of the text from url(for example, alerttext and date). Can anyone help me in declaring the list adapter and list view in order to display the data in the way i want.
View 1 Replies View RelatedOn 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'm searching for android phones that can use video out to the tv for a research project. I'm considering the HTC Touch Pro.
Is there anything I have to do specifically to get the video out to work (for displaying my app on the tv)? or will the phone just display a running app on the tv without extra work?
I have google voice and use it for every phone call I make. I heard that there were issues with several gvoice updates, so I haven't updated google voice since 0.2.8 and it is working just fine- every call connects, no problems. Is it worth updating to the newest version of google voice with push? For those of you with 2.1 on your Eris- does google voice work for you?
View 12 Replies View RelatedI'm trying to determine whether or not my phone is defective, or if this is a current problem with the Cliq.
Of the apps I've downloaded, only a few of them have worked. Of those few that work, some don't work right. Has anyone had problems with these apps crashing on them, or just not working correctly?
- Nice Battery (see description at bottom of: My Ultimate CLIQ settings (so far))
- WeatherBug (kept showing the wrong location, crashed when trying to change location)
- Snake - doesn't work just says its "paused"
- RingDroid - crashes when I select the "Facebook Pop" button
- Layar - screen is rotated 90 degrees at all times
There have been others, but usually I just uninstall them right after discovering it doesn't work right.
I've had an HTC Desire on Orange in the UK for about 6 weeks and it is having persistent problem. Firstly despite having a strong 4-bar out of 4 signal, online services and the internet do not work at all when a 3G signal is being received (e.g. news, weather, all widgets, internet, email etc).Calls and texts do work however with a 3G signal.But when a 3g+ signal (HSDPA) is being received, all internet services as above work fine.However, when a 3+ signal is being received, the phone does not make or receive calls or text messages, and often fails to send texts. Calls I make immediately shut down (bleep + �call ended�), and incoming calls from other people go straight to answerphone. Also often when turning the data connection on/off, it freezes and has to be rebooted, and turning airplane setting on and off does not fix the problem.
I have also tried the different network settings (GSM, WCDMA, auto, etc). �GSM� sends and receives calls and texts but doesn�t work (or is incredibly slow) with internet, and �auto� and �WCDMA only� show the problems as above.I don't think this is a network/coverage issues as, as I have seen many people reporting these same issues on other networks and in other parts of the UK, and I have read that other people are having to manually turn off HSDPA to be able to make calls (using an app?). Even if I can stop HSDPA from connecting to make sure the phone works, I still can�t use the internet at all on 3g � even GSM works better!
Finally, when I connect to a bluetooth device (e.g. car and headphones) the phone will connect briefly, and then randomly disconnect. I have also seen this issue reported elsewhere.I very much like the phone and don't want to get rid of it, but these problems are making the phone unuseable.Also I don't know if I should be contacting HTC or Orange about this. Will the upcoming Android 2.2 fix these problems?Anyone know how to fix this or if I need a new handset? Are there any apps that can help? Also does the Nexus One have these problems and are they fixed by Froyo?
So I made a discovery - my dialpad doesn't work during a call. Even if I bring it up via the softkeys, the numbers don't register a tap...anyone. else have this issue or is it just my phone?
View 49 Replies View RelatedI have so far found two bugs in Galaxo 1.6.3:
a) Speaker doesn't work in call (very weak). works well in ringtones etc.
b) Scrolling contacts by letter doesn't work.
Other than that this is a leap forward, especially with the overclock options!
Both bugs, as well as others, fixed in 1.6.3.1 update!