Android :: Cant Dynamically Update ListAdapter For ListView
Mar 19, 2010I have a problem with adding new items to ListView.
I use custom adapter MyListAdapter. I do that way:
CODE:...................
View 7 Replies
View 7 Replies
Android :: ListView And ListAdapter
May 25, 2010I am trying to use ListView and ListAdapter. If I create a simple Android project and add a ListView as the content view, and set it's adapter to my adapter based on ListAdapter, everything seems to work. My ListAdapter's 'getCount' is called, and I return 3, my 'getViewTypeCount' is called and I return 1, my 'getItemType' is called and I return 0, and for each item, my 'getView' is called and I return a TextView. Everything works, and the list is displayed with 3 items.
Now if I try and do the same thing in a more complicated environment, it does not work. My 'getCount', 'getViewTypeCount' and 'getItemType' methods are called, but the 'getView' method is never called and the ListView appears empty.
Now I know that I must be doing something wrong in the more complicated case, but I cannot see what it is. The code is really too involved to post here, but I was hoping that someone could give me some ideas as to why my 'getView' is never called even though I return 3 from my 'getCount' method.
Android :: ListView And Selected Items With A Custom ListAdapter
Oct 13, 2010Android has ListView component which is quite nice. The problem is that I created my own adapter to supply viewitems for each item displayed and I don't get anymore: Background color change when i scroll the items using up/down arrows. Background color change when I select an item. How do I do that?
View 1 Replies View RelatedAndroid :: Bind Data To ListView Without Preparing ArrayLists For ListAdapter?
Sep 14, 2010I get my Models in a nice object-oriented form. In order to bind them to my List, I have to use the listAdapter. Can I only fill this listAdapter with stupid ArrayLists? Because that means, I have to iterate over my ModelCollection and pull all the data out of my Models again. So, I detach my data from the models and I cant easily refresh the data in my listView, if something chances in the modelCollection (like becoming bigger through new Items / pagination). Does a more intelligent way exist, than I use right now? Can I bind my ModelCollection more driectly to the listView?
ModelCollection modelCollection = ModelCategory.findAll();
/*
* Prepare Data for Adapter
*/
ArrayList<String> itemTitles = new ArrayList<String>();
// Iterate over my ModelCollection and pull all the Data from each Model
for (int i = 0; i < modelCollection.items.size(); i++) {....................
Android :: Java.lang.ClassCastException When Using Self-defined ListAdapter In Listview
Mar 11, 2010I am writing a adapter for a specific app, the problem I met is:
I have only 1 listview in main.xml, and the row style is defined in file_row.xml. If I simply use list.setAdapter(new ArrayAdapter<String>(this, R.layout.file_row, R.id.file_name, items)); where items is a ArrayList<String>, everything works well.
But if I use my custom Adapter, say, list.setAdapter(new MyOwnListAdapter(this, filename)); and in the class of MyOwnListAdapter, the code has been simplified as
CODE:................
But I always met the problem which is:
CODE:.........
I thought the self-defined Adapter class actually has only one line of valid execution, which is super(context, R.layout.file_row, R.id.file_name, filename_list); It's essentially identical to direct calling of list.setAdapter(new ArrayAdapter<String>(this, R.layout.file_row, R.id.file_name, items)); Then why I always got this error if I call my own Adapter?
Android :: Dynamically Grow Listview
Nov 2, 2009I am trying to make ListView which should display data from db. But the db is filled slowly so want the entries in the ListView to grow dynamically according to the elements in db. For example on a desktop music player when you import a folder to the music library the list with songs is filling in real time with the newly added songs. So how can i get this working on android.
View 5 Replies View RelatedAndroid :: Dynamically Loading ListView
Sep 28, 2010I want to dynamically load a ListView, for example, load them during the scrolling so its not loading all 100 posts I have. How can I achieve this?
I have looked at similiar solutions here at SO, but since I not got it to work, I asked this question.
My code:.............
I have in the same .java file, functions to download the info from the web and loop through 100 items, like this:
CODE:................
And then it add a new order correctly and so on. But now!(?) I want to have so when the first item is loaded, it should appear and when scrolling it loads gradually.
Android :: Add Image In Listview Dynamically?
Sep 21, 2009How can i add image to my listview dynamically.
Here is My Code...
Android :: Change Dynamically Items In A ListView
Sep 23, 2010Im using a custom listView with a Title and a Subtitle where you can read a brief explanation of the item.
For each item on the list, im displaying an alertDialog to select an option (different for each case). When the option is selected, i want to change the Subtitle for the option selected by the user.
This is what i tried:
CODE:.....................
For the first item on the list it works fine, when i select an option, the subtitle get replaced by that option, but when i make a selection in the alertDialogs of the other 2 items, the option selected replaces the subtitle of the first item!
Dynamically Create Expandable Listview In Android
Oct 4, 2012i have to create expandablelistview is dynamically.how can i do.
View 4 Replies View RelatedAndroid :: Pick Contacts And Dynamically Adding Into ListView
Dec 11, 2009I am copying my code below to do the above. The problem I have right now is after I have picked a Contact from the list, I am not able to add the name to the listview. I get a Force Close at that step. See point no. A below to understand what I am talking about.
Also, the ListView is built using 'strings' ArrayList which is empty the very first time. The Menu option 'Add' is then used to pick a Contact and add the contact Name to the ArrayList which is then:
CODE:................................
Android :: Change The Divider Height Of Listview Dynamically
May 1, 2010I have a listview in which there should be different divider height between different rows. So, how can we set the divider height dynamically?
Suppose, I have 10 rows and there should be a divider height of 5 between first 2 rows and then there should be a divider height of 1 between next 5 rows and so on.
Android : How To Append Additional Rows In ListView Dynamically?
Dec 16, 2009Is there a working example out there that demonstrates how to append additional rows in ListView dynamically?
View 3 Replies View RelatedAndroid :: Adding ListView Items Dynamically - Force Close
Dec 11, 2009I have an Absolute Layout with two buttons on top, a Text View of fixed size in the middle and List View as the rest of the Layout.
I want to use the top left button to add a list view item to the existing list and the top right button to remove the last item from the list. The List is layed out properly when the App starts, but as soon as any of the two buttons is pressed, the Activity Force Closes.
Here is the code:..................
Android :: Dynamically Extend The Height Of ListView Row Background Image
Apr 23, 2010I am loading a listview dynamically. I have set a .9.png image as row background image. The main purpose of using .9.png image was to extend the height of the image dynamically according to the contents of the listview. But, the image is not getting extended. The contents which can be displayed within the height of the row are being displayed and the rest are being cut.
View 3 Replies View RelatedAndroid :: Layout Not Displayed Properly While Loading Listview Dynamically
Apr 22, 2010I 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.
Android :: Dynamically Change Text Color Of A TextView Inside A ListView
Nov 18, 2010I'm trying to create a game lobby for a project, and I'd like the game's status text to be a different color: red for an "[IN PROGRESS]" game and green for a game that's "[Waiting for x players]". The ListView will be populated with data, and each ListView item will have a game ID and then immediately to the right of that the game's status.
Right now I'm essentially using the Hello ListView code to create my ListView.
(In constructor)
CODE:...........
Then, I have a refresh button that obtains data from our database. It will get two Strings, one for the ID of the game, and the other for the status of the game. If the game status is 0, then it's still waiting for players. If the game status is 1, then the game has started. So, I create a gameItem to add to the gameList:
CODE:.............
This is where I'm stuck. I don't really understand how I can alter the specific TextView when I create the gameItem or when I add that to the gameList. There isn't a way I can see of accessing the TextView's properties. I see how the text of the view is set (through the mapping of the strings to "line1" and "line2", but I don't know how to change any of the properties.
ListView - Add / Remove Items Dynamically
Aug 29, 2012how to dynamically add/remove items to a ListView and display it? how to put a list of items (that can be clicked), and put a list of CheckBoxes?
View 1 Replies View RelatedAndroid : Layout - Change The Text Color Of The Textview Inside The Listview Dynamically
Oct 17, 2010Can I modify android.R.layout.simple_list_item_1? For eg., I want to change the text color of the textview inside the listview dynamically. For this, I need to get to the textview and change its color.. How can I do that?
View 1 Replies View RelatedAndroid :: Layout Not Displayed Properly While Dynamically Loading A Listview In Android
Apr 22, 2010CODE:...................
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.
Android :: Dynamically Extend The Height Of The ListView Row Background Image In Android
Apr 23, 2010I am loading a listview dynamically. I have set a .9.png image as row background image. The main purpose of using .9.png image was to extend the height of the image dynamically according to the contents of the
listview.
But, the image is not getting extended. The contents which can be displayed within the height of the row are being displayed and the rest are being cut.
Android :: Apply Background Color To Listview Dynamically In Android
Dec 15, 2009How to apply background color to listview dynamically in Android?
View 1 Replies View RelatedAndroid :: Set MarginBottom In Android Listview Or Linearlayout Dynamically
Sep 17, 2010I want to set layout_marginBottom using java code or dynamically in list view or linearlayout, how to achieve this?
View 2 Replies View RelatedAndroid :: How To Update Widget Dynamically?
May 28, 2010I am currently learning about widgets in Android. I want to create a WIFI widget that will display the SSID, the RSSI (Signal) level. But I also want to be able to send it data from a service I am running that calculates the Quality of Sound over wifi. Here is what I have after some reading and a quick tutorial: public class WlanWidget extends AppWidget Provider {RemoteViews remoteViews; AppWidgetManager appWidgetManager; Component Name thisWidget; WifiManager wifiManager; public void onUpdate(Context context, AppWidgetManager appWidget Manager, int[] appWidgetIds) { timer timer = new Timer(); timer.schedule AtFixed Rate(new WlanTimer(context, appWidgetManager), 1, 10000); The above seems to work ok, it updates the SSID on the widget every 10 seconds. However what is the most efficent way to get the information from my service that will be already running to update periodically on my widget? Also is there a better approach to updating the the widget rather than using a timer and timertask?
View 12 Replies View RelatedAndroid :: Add Table Row Dynamically - Unable To Update
Jul 22, 2009i am using TableLayout and i am adding row dynamically. when the all the row is created after that i want to update that row one by one mean i want to add image in that row but problem is what i am not getting any row id or any reference of specific row due to this i unable to update the row
View 2 Replies View RelatedAndroid :: How To Update Widget Dynamically (Not Waiting 30 Min)?
May 28, 2010I am currently learning about widgets in Android.I want to create a WIFI widget that will display the SSID, the RSSI (Signal) level.But I also want to be able to send it data from a service I am running that calculates the Quality of Sound over wifi.Here is what I have after some reading and a quick tutorial:public class WlanWidget extends AppWidgetProvider{
RemoteViews remoteViews;
AppWidgetManager appWidgetManager;
ComponentName thisWidget;
WifiManager wifiManager;
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
Timer timer = new Timer();
timer.scheduleAtFixedRate(new WlanTimer(context, appWidgetManager), 1, 10000);
private class WlanTimer extends TimerTask{
remoteViews remoteViews;
AppWidgetManager appWidgetManager;
ComponentName thisWidget;
public WlanTimer(Context context, AppWidgetManager appWidgetManager) {
this.appWidgetManager = appWidgetManager;
remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
thisWidget = new ComponentName(context, WlanWidget.class);
wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
@Override
public void run() {
remoteViews.setTextViewText(R.id.widget_textview,
wifiManager.getConnectionInfo().getSSID());
appWidgetManager.updateAppWidget(thisWidget, remoteViews);
}The above seems to work ok, it updates the SSID on the widget every 10 seconds.However what is the most efficent way to get the information from my service that will be already running to update periodically on my widget?Also is there a better approach to updating the the widget rather than using a timer and timertask? (Avoid polling)UPDATE As per Karan's suggestion I have added the following code in my Service: RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
ComponentName thisWidget = new ComponentName( context, WlanWidget.class );
remoteViews.setTextViewText(R.id.widget_QCLevel, " " + qcPercentage);
AppWidgetManager.getInstance( context ).updateAppWidget( thisWidget, remoteViews );This gets run everytime the RSSI level changes but it still never updates the TextView on my widget, any ideas why?
Android :: Listviews Dynamically Update UI Output When Database It's Binded To Changes?
Dec 1, 2009I have a database that gets updated by a background thread. Is is possible for the UI ouput(using a listview) to change when a database entry is added/deleted? I've seen examples of using SimpleCursorAdapter and listViewAdapters and I'm not sure which to use and if it would even work.
I found an "efficient" listViewAdapter which would work great for me since it doesn't call findViewById often and I can change the data structure to hold exactly what I need, but I don't know how to hook it into my database adapter so it dynamically updates the output when there is a database change. Example: http://www.androidsnippets.org/snippets/125/
Android :: Dynamically Update Autocomplete Box In Android?
Aug 22, 2010I will like to know if we can continuously call some service for fetching results and displaying in Autocomplete list.I have one screen with the text box and when user starts entering in that textbox the autocomplete should get filled with the data. The data will not be hardcoded and will be fetched through http connection.I think I need to call http connection in onTextChanged method of Edittext but is that the perfect solution.Moreover, should this type of implementation done in mobile application. Since, this feature is web based. Can this be done in mobile application too?
View 1 Replies View RelatedAndroid : How To Update A ListView In Tab?
Nov 5, 2009I saw Mark M. example (http://www.androidguys.com/2008/07/28/fancy- listviews-part-five/ ) and test it. This is really good. But i have one problem: After i start the app, i want to see my GUI (one Tab content is a ListView, the second and last Tab is a MapView). In a background thread, i want (and i can) load the data for the listView. So i first create the Tab with the ListView without any content (my string array is empty: String [] array = {""}; ). Now if the background thread is ready and the array-String has get the data, i want to update the ListView in my tab. I try: my_adapter.notifyDataSetChanged(); but without success. What must i do, that the ListView gets updated.
View 5 Replies View RelatedAndroid :: ListAdapter Repaint ?
Mar 22, 2010i have the following problem. I fill a ListView with a custom ArrayAdapter with data from a BD. However, in background, i'm updating those datas from the info provided by an API, so the idea is when the update finish, the adapter shows the updated data instead its "old version".
The problem is that when i do that, i notice a lag while the adapter is updating itself. Is the any efficient solution to avoid this?