I have implemented Section Indexer for an Adapter class which extends BaseAdapter.Now for the first launch Section Indexer is showing an overlay correctly. But when the contents of the list gets updated the Section Overlay does not get updated and gives ArrayOutOfBoundException. Now what happens is overlay gets updated but the Overlay is coming to the left top of the listview.
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I have a custom adapter to display a list of items with section headings. I've looked at Jeff Sharkey's SeparatedListAdapter and CommonsWare's MergeAdapter as examples of how to achieve this, and I now have a solution which works by providing a separate adapter for the content of each section. This creates a big performance problem, though. In my case, there are potentially thousands of items in the list, each with an associated date, and I want to use the date as section heading for all the items with that date. So, without section headings, I'd have a single Cursor which returns the items sorted by date. Nice and easy. With section headings, I'm currently doing this: One Cursor to select all distinct dates in the dataset. For each distinct date, a separate Cursor to return the items matching that date. Pour the dates (section headings) and separate SimpleCursorAdapters for each date's items, into my custom adapter.
View 1 Replies View RelatedI have built a simple app that uses a Google MapActivity. On top of the Map, I have 2 overlays, a Marathon Course and the position of a runner. The latter position overlay simply shows an updated blue dot.I update the location of the dot every second but the screen does not refresh. If I tap the scrren then the dot updates. Am I missing some hard refresh call somewhere? My Overlay code is small and shown below. Note that it does go into the draw routine every second and the point is changed.
View 3 Replies View Relatedin my app i am having an Activity that launches another Activity ontop of it. The second Activity is meant to provide controls like next and previous for the first activity.How can i pass button events between the two activities that are visible at the same time without closing the Activity with the controls?
View 2 Replies View RelatedI like tu use the MapActivity to display some pins. When a pin is pressed i like to open a description. This can I obtain following the tutorial: http://developer.android.com /resources /tutorials/views/hello-mapview. But now I like to put a button on the overlay window. That button should open a detail activity. How can I make this? How is possible to personalize the overlay "info window"?
View 2 Replies View RelatedI have ListView with adapter class which extends ArrayAdapter and implements SectionIndexer. The problem is section indexer is not updated when adapter data is changed. Even if i add new elements the section remain the same. I tried some options setFaseScrollEnabled(false); setFaseScrollEnabled(true); but i got IndexOutOfBounds exception. So how can i update sectionIndexer when adapter's data is changed.
View 2 Replies View RelatedI 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.
View 3 Replies View RelatedI have a list view that can display items based on internal state (it has items, and 'viewed' items). i need to be able to toggle between the two states, i do that using a simple button that change the adapter's state and the adapter then called notifyDatasetChanged(). My data DOES gets updated, however i was facing two problems:
if in the previous mode the list was partially scrolled, it stayed in that state after i changed the data set (if i was half the way down i'll be half way down in the new data set as well, this is not the behavior i want, but i cols not find a way to scroll the list manually to position 0. any ideas?
(setSelected is not exactly a solution since i DON'T want any selection i want to stay in touch mode) In my list View each item has an image that is fetched from the net, as so it's being brought using my networking manager and i send the image request ONLY if i'm in this screen for the first time OR if scroll state is idlle, i didn't want to start loading images from the getView method since if i fling the screen it may load a lot of unnecessary images. However when calling notifyDatasetChanged() the scroll listener methods are not called. i solved this one by using notifyDatasetInvalidated even though my data is not empty, is there a better way to solve this issue ?
I have a list view that can display items based on internal state (it has items, and 'viewed' items). i need to be able to toggle between by two states, i do that using a simple button that change the adapter's state and the adapter then called notifyDatasetChanged(). My data DOES gets updated,
However i was facing two problems:
1. if in the previous mode the list was partially scrolled, it stayed in that state after i changed the data set (if i was half the way down i'll be half way down in the new data set as well, this is not the behavior i want, but i cols not find a way to scroll the list manually to position 0. any ideas ?
2. In my list View each item has an image that is fetched from the net, as so it's being brought using my networking manager and i send the image request ONLY if i'm in this screen for the first time OR if scroll state is idlle, i didn't want to start loading images from the getView method since if i fling the screen it may load a lot of unnecessary images. However when calling notifyDatasetChanged() the scroll listener methods are not called. i solved this one by using notifyDatasetInvalidated even though my data is not empty, is there a better way to solve this issue ?
Just watched Google IO's "World Of ListView" presentation [1]. Awesome stuff. I think every Android dev should watch it.
One gotcha for me was to use BaseAdapter.notifyDataSetChanged[2]. I checked code that I have written more than a year ago and found that I did try to use that, but commented it out with '// doesn't work' and I use requery() instead. That is of course much slower.
I now tried to find out why I wrote that it didn't work and hoped that I am meanwhile so much wiser that it would be easier to understand the proper use of the API. So much for ambition: The effect I see is that the list is not updated after I call notifyDataSetChanged(), but works with requery() and I am not so much wiser.
What could be the issue here? I use a ResourceCursorAdapter and only implemented the bindView() Method. This method is called when I call notifyDataSetChanged() on the RCAdapter. However the method is called with a cursor that contains the stale data.
Now there was a second gotcha from the presentation that I couldn't really place. It was said that the data should be committed on the GUI thread too (before calling notifyDataSetChanged()). I couldn't place it then, but I now suspect that this may be the issue here. So the rule would be to do the commit() on the Cursor on the UI thread? I do the updates to the database using a Service. This Service runs in the background, sometimes the app is in the foreground at the same time, but most often not. So I don't see how I should commit something in a UI thread? Is this the issue here? There are two different Cursors and I could only use notifyDataSetChanged when it would be the same cursor, otherwise requery() is correct?
Is that it? Any ideas? Is somebody going to write a book "The Android SDK - The missing manual"?
I'm running into an IllegalStateException updating an underlying List to an Adapter (might be an ArrayAdapter or an extension of BaseAdapter, I don't remember). I do not have or remember the text of the exception at the moment, but it says something to the effect of the List's content changing without the Adapter having been notified of the change.This List /may/ be updated from another thread other than the UI thread (main). After I update this list (adding an item), I call notifyDataSetChanged. The issue seems to be that the Adapter, or ListView attached to the Adapter attempts to update itself before this method is invoked. When this happens, the IllegalStateException is thrown.If I set the ListView's visibility to GONE before the update, then VISIBLE again, no error occurs. But this isn't always practical.I read somewhere that you cannot modify the underlying this from another thread--this would seem to limit an MVC pattern, as with this particular List, I want to add items from different threads. I assumed that as long as I called notifyDataSetChanged() I'd be safe--that the Adapter didn't revisit the underlying List until this method was invoked but this doesn't seem to be the case.
I suppose what I'm asking is, can it be safe to update the underlying List from threads other than the UI? Additionally, if I want to modify the data within an Adapter, do I modify the underlying List or the Adapter itself (via its add(), etc. methods). Modifying the data through the Adapter seems wrong.I came across a thread on another site from someone who seems to be having a similar problem to mine: http://osdir.com/ml/Android-Developers/2010-04/msg01199.html (this is from where I grabbed the Visibility.GONE and .VISIBLE idea).To give you a better idea of my particular problem, I'll describe a bit of how my List, Adapter, etc. are set up.I've an object named Queue that contains a LinkedList. Queue extends Observable, and when things are added to its internal list through its methods, I call setChanged() and notifyListeners(). This Queue object can have items added or removed from any number of threads.I have a single "queue view" Activity that contains an Adapter. This Activity, in its onCreate() method, registers an Observer listener to my Queue object. In the Observer's update() method I call notifyDataSetChanged() on the Adapter.I added a lot of log output and determined that when this IllegalStateExcption occurs that my Observer callback was never invoked. So it's as if the Adapter noticed the List's change before the Observer had a chance to notify its Observers, and call my method to notify the Adapter that the contents had changed.
So I suppose what I'm asking is, is this a good way to rig-up an Adapter? Is this a problem because I'm updating the Adapter's contents from a thread other than the UI thread? If this is the case, I may have a solution in mind (give the Queue object a Handler to the UI thread when it's created, and make all List modifications using that Handler, but this seems improper).I realize that this is a very open-ended post, but I'm a bit lost on this and would appreciate any comments on what I've written.
How to load data in expandable List Adapter through Scroll .
Means I want to add data as per Scrolling in Run time.
I have a ListView populated via a CursorAdapter. I give my user the ability to alter the data in the list. For example, the user can mark a row as being unread (the data are messages).
Suppose my user marked a row unread. Would a proper implementation mark the row in the database as read and then requery the Cursor?
I'm have a custom GridView Array Adapter. The problem for me is that when the grid list gets large enough to scroll off the screen the gridview and arraylist get out of sync. For instance in my case I have code that checks if an actor is of type director the text color should be red. if you scroll up and down my list enough times all the actors text in my gridview will become red. The thing is that the Gridview appearance actually looks fine its the backing data. Here is the complete class. In the code you can see where I tried to override getItem and getItemId but that didn't fix anything. Code...
View 6 Replies View RelatedI 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?
I am trying to overlay route data in KML files on a MapView.
The following code works great:
CODE:................
The only problem I have with this is that I don't need to re download these KML files every time. I have about 10-15 KML files that will rarely change. Also since it has to connect, download, and parse these each time there is a delay in opening the maps.
It would make a lot more since for me to save these as a local resource and have the URI reference it there. Is there a way to construct a URI using the geo: scheme and have it point towards a local resource?
It looks like file:///sdcard support was included in 2.1. The only reference I could find to it was at the end of this bug report thread. I am currently at work and don't have time to play with this yet but I would like to figure it out later. I feel like there are a lot of people on stackoverflow and elsewhere who would really appreciate a reasonable way to do this.
I need some clarification regarding Updating android OS version. Currently my mobile is running on android-1.6 and i have installed so many applications, some of them are dealing with the databases. If i update my mobile with android 2.1 version, will the data still remains same? What about the Preference variables information that are saved in the android phone memory if i do FACTORY RESET?
View 11 Replies View RelatedI have a tab widget where one of the tabs is a chat-type feature. I want to update the chat data at an interval (variable depending on whether the chat tab is active or not).
The best approach seemed to be using an AsyncTask in my main TabActivity class, as that would avoid any issues of the chat activity being destroyed while in the background, while an AsyncTask was running. I wanted to ensure that the Activity isn't destroyed and recreated, thus causing my AsyncTask to be unable to modify the actual active Activity's data.
However, now that my AsyncTask is in the TabActivity activity, I don't have a direct way to call my Chat's ListAdapter notifyDataSetChanged() from my onPostExecute() method anymore. Is there a way to get a reference to a given Tab's current Activity from the TabHost/TabActivity?
Or, alternatively, can I assume my chat activity will never be destroyed as a child activity of the TabActivity activity (well, never destroyed while the TabActivity is active at least), and then just put the AsyncTask in the Chat Activity?
Do not update your profile via Setting/System Updates.
It deletes your pictures, videos, and movies. Just an FYI in a more prime location since not everyone reads the troubleshooting forum.
http://androidforums.com/support-troubleshooting-evo-4g/105549-lost-all-pictures-videos-movies.html
If you must do it, back your SD card up first.
I can not get any kind of data on my phone after updating to cm 6.0 and idk if it is a verizon problem or if it was something i did?
View 2 Replies View RelatedI got question from SE PC Companion if I wanted to update. I updated, and followed every step. But when I restart my X8, I've lost all data, and I still got android 1,6. The Backup app wont Recovery my data, even if I saved it.
View 17 Replies View Relatedto my HTC it says "this may result in additional chargers from your wireless provider" i have an incredible from verizon
View 3 Replies View RelatedI want to add,delete,update android Contact Database using native c code. please tell me how to do if any one have done it.
View 3 Replies View RelatedAnyone having trouble with widgets stop updating? Like my clock/calendar/weather/news/pretty much any widget i have stops updating after an hour. So i look at my clock widget two hours later and it is an hour behind. Happens to ALL my widgets.Even the quick turn on/off wifi,bt,gps and such. They just stop updating/showing animation.I have ADW launcher installed. I am wondering if it is that. I do not really want to remove it as i hate the stock 3 button interface at the bottom (why do i need a contacts and phone, just use the phone to look thru contacts, wasted space IMO) and am quite keen on keeping the 5 button.Any ideas? If i power off the phone and turn it back on it's fine again for about an hour. SOmetimes randomly thru the day it will start updating and working fine again then randomly stop again.
View 12 Replies View RelatedI have an app which I think could be in the featured section of the Android Market and was wondering the best way to proceed. The application is Scan2PDF Mobile which uses your phone's camera to "scan" documents and make PDF files which can be saved or emailed from the phone. The pages are enhanced and compressed and then made into a multi-page PDF. Think of it as having a scanner, photocopier and fax machine in your pocket/Sicen Scan2PDF Mobile has been on the Adroid market it is proving very popular, getting an average rating of 4.7. It is unlike any other app on the market and in our opinion would be a good candidate for the featured list - so how do we go about it?
View 7 Replies View RelatedI literally need like step by step instructions.I can't figure out how to use google calendar on the Fascinate.I'd like to put a button/app whatever on that goes directly to it.Whenever I try to hit calendar it comes up and says it's not supported.I don't know if it's because of the cursed Bing on the phone or what. First smartphone here which I don't think I need to point out.I added the android agenda widget but I can't figure out how to use it.It shows appointments but I can't delete things that change.
View 1 Replies View Relatedcould anyone point me to some examples on how to achieve Tableview with section and Index on Section. Similar to one it's in iPhone => http://www.iphonesdkarticles.com/2009/01/uitableview-indexed-table-view.html
View 3 Replies View RelatedAll fee information is shown in USD, GBP, EUR, AUD, and CAD so I think that tells us who is going to be able to sell apps in the coming months. Allowable price ranges are $0.99 to $200 (YES $200 Sheesh) or 0.50 GBP to 100 GBP.Chargebacks for less than $10 USD will be automatically charged back.A $3 USD fee may be added to chargebacks on top of the refund.The 24 hour refund period starts when the user has *downloaded* the app, not when they purchase it. The views expressed in this email are those of the author and not necessarily those of Funky Android Limited, it's associates, or it's subsidiaries.
View 7 Replies View RelatedSo I've recently released an application on to the Android Market. Whilst it was in the "Just In" section I was seeing decent download numbers, but since then interest seems to have dropped off significantly. I think now people can only find my app through a specific keyword search, which doesn't make me particularly confident about it ever becoming popular.
What can you do when your app has passed the 'Just In' stage but has not reached the 'Featured' stage? The majority of applications seem to be in this middle stage so I think other people must have a similar problem. It seems like the 'Featured' section just makes the popular apps more popular, and makes it really difficult for newer apps to ever catch up with them. Does anyone know if the situation with the Apple App Store is any different?
It seems to be possible to refresh your app and make it appear in the 'Just In' section again if you update it sometime after, but I can't find any real guidelines on this. Is anyone familiar with the specific rules for this, and is repeatedly riding the 'Just In' buzz the only viable strategy for a new app?
I'm adding section headers for my listView, there are few methods on the web. Since I'm using simpleCursorAdapter to manage my listView, I adopted phil bogle's method. http://thebogles.com/blog/2010/02/section-headers-for-android-listviews/
The error occurred at this part of the code:
CODE:.................
This is the LogCat shows how they compare while I scroll up the list:
CODE:..............
The correct output should be:
Sun, 05 Sep 2010
112
120
But when I scroll up, the setViewValue calls 120 first and compare with preDate(show above), it becomes:
Sun, 05 Sep 2010
112
Sun, 05 Sep 2010
120
So how can I make the section headers fixed after creating the headers? Why setViewBinder been called while scrolling?