Android :: How To Get Notified When ListView Displayed?
Nov 12, 2010
I have a list view with array adapter to show user some information that retrieved from Internet, As we all know reading data from Internet requires some time to finish, but if I try to read data on getView(), it means user must wait and he/she cannot see anything at that time, the screen is black for long a time because it will cost too much time to finish. This is unacceptable.
So I think maybe I can show user a empty list view first and then display a progress dialog to let user know I'm now just reading data. The background task will read data and send message to UI thread when job is done. But there's one problem: I don't know how to get notified when list view is displayed. I mean, I want to know when & where to show that progress dialog when I first show user an empty list?
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Jul 30, 2009
I'd like to use CursorAdapter but Cursor its based on cannot be returned by simple sql query, since in db i have two fields and based on some criteria they build the String that would be displayed in the ListView.
what is the best solution: forget CursorAdapter and use ArrayAdapter or MatrixAdapter iterating over my db Cursor and adding rows, or maybe use CursorWrapper or some ither solution?
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Aug 28, 2010
I have list of items ion my activity which I load dynamically, item after item. Initially I load "lightweight" version and when processing is done I want to update the item with new information. Like set some text or replace an image. That means I need to update what ListView item is displaying after Adapter#getView already returns. Of course I don't know if user is actively scrolling and this item is still visible or has been scrolled out ot view. The only thing I can think of is to extend View so it performs some operations on it's own thread and updates itself when done,but will it work?
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Apr 22, 2010
I am trying to laod the listview dynamically. There are three textviews inside a listview. The text to be set in the textview is fetched from the server. All this is working fine. I am able to fetch the text and am able to display it inside the listview.
The only problem is the position of the textview. The xml layout file is as under:
CODE:.............
If I look at this xml layout in the eclipse layout tab then it is displayed properly. Problem occurs only when the text is fetched dynamically.
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Jun 24, 2009
I have a listview that is populated by a couple threads that pull in data from the network. Before that data comes in, there are some default values displayed. When the screen loads, there are 6 items displayed, each with the default data. The 1st (index 0) loads and is updated on the screen, and then number 6 (index 5) is updated with that same info. Then, item 2 (index 1) loads, and then item 5 (index 4) mirrors that data. Then item 3 loads, then item 4 reloads with the correct data, then then item 5 with the correct data, then item 6. Why are items 5 and 6 briefly showing the data from other elements in the list? I can't figure out what in the world could be causing this.
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Apr 22, 2010
CODE:...................
This is the layout that I am inflating in the Adapter. Everything is displayed, but only the second textview which should be displayed at the bottom is getting displayed at the top. Can someone let me know the problem with this?
I I view this in the layout tab in Eclipse then it displays properly. The problem occurs only when the text is fetched dynamically.
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Nov 1, 2009
Our application displays widgets that update every minute through Alarm. It works fine under 1.5 and 1.6 but since 2.0, widget is not displayed at all. Only initial layout is displayed.
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Jun 24, 2010
Finally bought my Droid last week, and am very glad to have done so. My first smart phone, and I'm having a blast. One question about FB notifications. Is there any way to change what you get notified for? Right now i only get notified for pokes. It'd be nice to hear "Droid" when someone posts on my wall or something. Any ideas?
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Nov 5, 2009
I'm wondering if there is any way to get notified when applications are installed. I'd like to install my app as a service which just waits to be notified on app installation.
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Sep 30, 2010
Can I be notified of the following events for an Activity: I realize that I can probably override the main View's onSizeChanged() and be notified when the View has changed, but how can I be notified when it's about to change?
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Aug 13, 2009
I am creating an app and the requirement is - I have to listen to the SD card for new data comes in. Whenever a new file is downloaded into SD card , I want to be notified. (or say , I want to listen for changes). Any code sample, link will be nice to have.
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Oct 16, 2010
I'd like to implement a feature that monitors incoming calls and SMS and blocks them if necessary. But I don't know how to capture such events, could someone tell me how to do that?
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May 28, 2009
I am listening events from accelerometer sensor and everything is going right. The problem occurs when phone gets in standby mode and I am not being notified by sensors anymore. Does Anyone know if it's possible to get sensor notifications, by implementing a listener, even if phone is in standby?
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Jan 28, 2010
I am currently working to get notified when a new document is added/edited/deleted.But I dont find any way to do this.
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May 12, 2010
Do any have idea about how do I get notification when the day changes from 23:59:50 to 00. There in intent broad casted as DATE_CHANGED by android but this intent is to get notified only if the date is changed by user it seems. I have basically have my function to run on the event.
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Nov 9, 2010
Is it possible to be notified in Android when the Audio system starts playing audio? it looks like i should wire up a BroadcastReceiver, but it's not clear what i would listen for. I could listen for the MediaPlayer intent, but that would only capture when that particular application was playing audio, not when a third party application played audio, etc.
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Jun 9, 2009
Is there a way to be notified from my application of sdcard mount? any services etc?
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May 26, 2010
I was wondering is it possible to get a notification of when a new configured network is added to the Wifi Manager in Android? I know you can get the current list of configured networks.
http://developer.android.com/intl/de/reference/android/net/wifi/WifiM...
But is it possible to get notification of when a new one is added? I don't see anything in the Wifi Manager that would be helpful. How this could be achieved?
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Nov 23, 2010
Does Android provide a notification of being in vicinity of a new Wifi Network? Whether the device is configured to connect to that wifi network depends on whether the device has the wifi configuration set for that particular wifi network, but is it possible to get notification whenever entering any new wifi network?
I saw the WifiManager class but the states inside the class do not seem to achieve what I am trying to do. Any ideas?
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Oct 6, 2010
I want to write a service for Android platform that is notified when the current foreground activity changes. Basically the service should do some tasks only when the top activity changes. Is there any way to subscribe and to be notified when this kind of event occurs? Or there is no possibility and the service should poll from time to time the list of running activities and to check what is the foreground activity ?Not preferable solution...
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Mar 12, 2009
If I upload a new version of the application. Does the user knows that there is a new version of the app?
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Dec 2, 2009
I would like to know whenever the top task is changing. i.e. when a new task is starting or a task is finishing or when the current active task changes. Is there an intent that is sent that I can listen to?
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Mar 15, 2009
I'm trying to find the "correct" way to do the following:
I have an activity with a button that starts a repeating task in the background. That is, if the user goes away from my activity, I want my task to still be scheduled and executed every x minutes. I want a status TextView to be displayed on the activity, and if the task happens to start executing while my activity is showing, the TextView should be updated so the user can be aware of what's going on. So basically, is there a way to start a scheduled background repeating task and be notified when it is executed? From what I saw in the sample applications, I understand I'm supposed to use AlarmManager and a Service but I'm not sure about the notification part.
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Jun 26, 2010
Is there a broadcast receiver or some kind of setting that we can listen/monitor to get notified if the internet/network has been connected.
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Sep 29, 2010
Is there a way to be notified when the keyboard is about to show, or has shown? The following events would be great:
keyboardWillShow
keyboardDidShow
keyboardWillHide
keyboardDidHide
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Jun 25, 2010
I am writing an app that connects to a telnet server via wifi. I have a service that manages the socket connection. It all works fine, but when the phone sleeps it disconnects the wifi radio, which causes the socket connection to break (and throws a SocketException). I feel like I should be able to set up a a broadcast receiver whose onResume() method is called when the wifi network connection is lost, and that would allow me to gracefully shut down the socket, and re-open it if the network is immediately re-connected. But I can't find anything like that in the doc or via searching.
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Jul 24, 2010
I would like my Activity to be informed when the SD card is removed, since it relies on files from the SD card (to keep apk size down) but for compatibility reasons is not targeted at Froyo. I'd like to close the application when the SD card is removed/mounted (giving the user a dialog message to inform them of course) so that I don't get IOExceptions etc (I'd quite like to not have to check everytime I load a file to see if the external storage is available, I already do a check on application launch). There doesn't seem to be any attribute in the manifest for this (like configChanges) that I can find.
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Jun 10, 2009
I've been searching the application permissions and I see no way to make an app to enable getting notified when the user send an SMS or make a phone call. How can I accomplish this task?
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Jun 4, 2010
Can i get informed in my android application when a user adds a new entry in his calendar application (i.e. via listeners, ...) or is checking the calendar every now and then via the content provider of the calendar app the only solution to find out if the user has added new entries ?
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Oct 15, 2010
Is it possible to get notified every time a new image,video is inserted on the sd card of your android device and how? I have looked at the Media Scanner class which indexes files but I can't find how to do get notified from that only how to notify Media Scanner of a new image I have created.
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