Android :: How To Add Data To An Empty ListView?

Jul 6, 2010

I have a problem with listView, I used ArrayList to store data, and a customized Adapter. But, when I remove all the data, and add one item again, it does not display anything in this list. What happens to my List, can anyone help me?



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Android :: How To Show Empty View When ListView Is Empty?

Sep 22, 2010

For some reason the empty view (TextView in this case) always appears, even when the List is not empty. I thought the ListView would automatically detect when to show the empty view.How can I hook up the empty view properly?

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Android :: How To Handle Empty ListView?

Sep 22, 2010

My app connects to the net and populates a ListView. Sometimes nothing will be returned. What is the best way to notify the user the list is empty?

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Android :: Specify View To Use When ListView Is Empty?

Feb 12, 2010

I can't find this in the docs - isn't there a way to specify a View to use for a ListView if the adapter is empty?

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Android :: An Empty Listview Rendered?

Feb 22, 2010

If a listview is not given any items, how is it rendered? Will it still expand to fill the space in the layout allotted to it?

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Android :: Possible To Use A ViewGroup For Empty ListView?

Jul 30, 2010

I have a ListActivity whose layout looks like. code...

However, my empty list view consist only of the ImageView listed first inside the nested LinearLayout.

This seems like a reasonable thing to do but I don't completely understand Android's layout rules yet.

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Android :: Way To Show Message On ListView Only With It's Empty?

Oct 27, 2010

I'm developing an Android application.Is there any way to show a message on a ListView only with it's empty?I'm using a custom ArrayAdapter, so I have to create a specific object with the text I want to show.I'm wondering if there is a specific field on ListView to setup a message when it's empty.

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Android :: Adding Empty Space To End Of ListView

Oct 17, 2010

I have a ListView that with alphabetical headers for each letter. I also have an index function that brings the letter headers to the top of the screen.

My problem is when I reach the end of the list setSelection is unable to bring the last few headers to the top because it will not scroll past the end of the list.

My question is this: Is there a way to add a blank space to the end of the screen dependent on screen size? I would like to scroll until the last item in the list is at the top of the listView.

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Android :: Call To ListView's Set Empty Method Not Working

Sep 16, 2010

I have an Activity which contains a ListView defined in XML (its not subclassing the List Activity class).I want to display a message when the ListView is empty, so I tried doing so with the setEmptyView method: Code...

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Android :: Way To Inflate Footer Layout Below Listview Without Empty Space?

Sep 6, 2010

I have listview and below it have footer to bind more data at footer button click event,the data has been binded well but the problem here is expanding of empty space after click event,when i scrolled to move down,when i reach the last list row by scrolling the footer position is being at same at initially loaded,but here the problem is the list scrolling is applies to this footer layout also when i scrolled down after list row the footer get's moving down,but i need it be after list last row and i also need to know how to scrolling to be stopped when particular condition satisfied.

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Send Data To Mysql Database - Posted Data Empty

Apr 6, 2014

I send data to my mysql database the posted data is empty...I don't know what is wrong with my code.

[HIGH]urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setDoOutput(true);
urlConnection.setChunkedStreamingMode(0);
OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream ());

[Code]...

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Android : Setting A Layout To Use As Empty View For A ListView In Case Adapter Has Zero Items In A Activity

Nov 16, 2010

How to use a layout as empty view for a listview when the adapter has zero elements?

setEmptyView is not working with this code :

CODE:..............

Layouts used :

CODE:...........

main.xml

CODE:...............

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Android :: Saving ArrayList To Txt File / Data Folder Empty

Apr 25, 2010

I am trying to save an arraylist to a .txt file below is the code I am using, which runs without error but when I try to go to Astro file manager and browse the data folder there is nothing there.

String filename = stationname.getText().toString() + System.currentTimeMillis();
FileOutputStream fos = openFileOutput(filename,Context.MODE_PRIVATE);
ObjectOutputStream out = new ObjectOutputStream(fos);
out.writeObject(report);
Report is the ArrayList that holds each of my station Reports.
out.close();

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Android :: Add Data Into The Listview

Nov 23, 2010

My ListView has to be customized like, it should have three imageView in each ListItem along with the name and date that has to populated from the DB,added with that, once i click upon the a list item ,that corresponding Listitem information has to be displayed in another Screen...The Size of the List should be based on the Cursor object from DB..and it should be possible to add data in to the Listview..too. how to proceed the above said..Please check the ScreenShot of ListView that i mentioned..(My ListView should have to be like this only)..[SampleListView Below- please click that link][1] http://imgur.com/RjtXe.jpg.

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Android :: Way To Show Data On Listview?

Jul 23, 2010

Here is my Arrival.Java. May i know why isn't there any data being shown on my ListView?

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Android :: Using OnListItemClick With Data Driven ListView

Jun 25, 2010

I have a ListView which its contents could change at any time (eg. a list of cities within a state; a new city could be added to the state in our database at anytime). How do I implement, if possible, the onListItemClick event to work with this? For example, if a user selects a certain city in the ListView, i should be able to pass a value that independently identifies what city was clicked onto my next activity. I can't listen for positions because they could change with an addition or removal of a city.

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Android :: Contacts / Numbers Data To ListView

Mar 31, 2010

Does someone know how to get a 'flat' map / list of the contacts and there phone numbers. I am currently using this to build a datastructure, so I can display it in a lIstView, which is not really fast. The code shows that I do two queries. Would it be possible to do this with one query so that I end up with a just one cursor. The structure ideally would be: contact name number number contact name number

This would then allow me with a custom listView Adapter to display the data and make the names non clickable.................

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Android :: ListView With Complex Data Model

Oct 20, 2009

I'd like to map an Array of "complex" data to a ListView. In a very simplified form my data model would look like something like this:
Code...

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Android :: ListView Data Binding From XML Parser

Aug 17, 2009

I currently building an android apps that retrieve data from a distant Web service and I search an efficient way to bind data form XML to ListView. I already use CursorAdapter and i search on the web for an "XmlAdapter". I read on Google IO topic "Coding for Life - Battery Life, That Is" (http://code.google.com/events/io/sessions/ CodingLifeBatteryLife.html) that is more efficient to use "stream parser" instead of "tree parser" but I don't find the way to build a class that implement ListAdapter because of stream parser can't navigate backward so I don't understand how implement method that use "position" parameter (How retrieve data before current XML Parser position?).

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Android :: No Data Appearing In ListView - Using SimpleCursorAdapter

Jul 26, 2010

With the below code, nothing appears in the ListActivity as I would expect.

No errors are shown in logcat.

CODE:..............

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Android :: Getting Data From SQlite And Place In Listview

Sep 7, 2010

How to get data from SQLite which contains some data. How to place it(the data) in the listview.

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Android :: Converting Sql Data Before Presenting It In ListView

Sep 30, 2010

I'm having my first stumbling steps with android and are trying to modify an existing notepad example from Android dev. I have a database with an existing column named CREATED_DATE (of the note) but the data for that column is presented as System.currentTimeMillis(). This is all good and probably in line with conventions since it's created by the developers.

But my problem is that I want to present the date in a ListView using the format "30 sep". My problem, how do I convert the data to that format before presenting it in the ListView? Right now I'm using this kind of adapter:

CODE:...........

Now, I've figured out how to convert currentTimeMillis() to todays date but how can I convert the data coming from the cursor before I toss it into the adapter?

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Android : Getting Stored Data From My Database Into ListView

Jun 22, 2010

package one.two;

import java.util.ArrayList;
import java.util.List;

import android.app.ListActivity;
import android.database.Cursor;
import android.inputmethodservice.Keyboard.Row;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView; Code...

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Android :: Getting Updated Array Of Data From ListView / Adapter

Aug 10, 2010

I 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.

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Android :: Construct Grouped Data And Display Of ListView

Dec 27, 2009

How do you make those standard header labels in the ListView Control?

An example would be in the contacts application you see the first letter of the grouped contacts for each letter in the alphabet.

If possible provide some code snippets on how to construct the grouped data and the display of the ListView.

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Android :: Need Efficient Data Mappings Example For ListView Drill Down

Oct 12, 2010

I'm pretty new to java programming and am looking to do basic data mappings.What I want to happen is when you click an item it goes to it's subcategory.I'm not worried about switching the data when an item is clicked. I'm just not sure how to create the data set in an efficient way using Android.Eventually this will be driven by a database but I want to figure out how to use mock-data to get this working first.I'd like to be able to access it like myData['category2'] or myData['category2']['subcategory3']Should I create this in xml files and link them up or is it best to create a new class structure for it?

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Android :: Binding Data From Database To Checkbox In ListView?

Oct 1, 2009

I'm trying to bind data from my SQLiteDatabase to a ListView. I'm currently using a SimpleCursorAdapter to fill in my ListView. Unfortunately this doesn't seem to work with setting a CheckBox's checked attribute. This is how I do it now; instead of changing the CheckBox's checked status the adapter is filling in the value to the text argument, so the value is displayed right of the CheckBox as text.

Java:
setListAdapter( new SimpleCursorAdapter( this, R.layout.mylist, data,
new String[] { Datenbank.DB_STATE, Datenbank.DB_NAME }, new int[] { R.id.list_checkbox, R.id.list_text } ) );

mylist.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent" android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android" >
<CheckBox android:text="" android:id="@+id/list_checkbox"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:checked="false" > </CheckBox>
<TextView android:text="" android:id="@+id/list_text" android:layout_width="wrap_content"
android:layout_height="wrap_content" > </TextView> </LinearLayout>

The field in the database is of course of type boolean and I've also tried to assign an id to the checked field to fill the value in.

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Android :: How To Fill A ListView (in Droid) With XML / JSON Data?

Feb 9, 2010

I read a tutorial, and it uses SQLlite and "SimpleCursorAdapter" to fill the list with items. This is the code...

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Android :: Resetting ListView After Adapter's Data Changed

Nov 21, 2010

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 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 ?

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Android :: ListView ArrayAdapter Data Updates Best Practices

Aug 26, 2010

I have an activity with multiple list views that are continuously receiving new values form a socket thread, another thread parses the data and updates the array adapters, then the ui thread calls notifyDataSetChanged() to cause the list to refresh.

My issue is that im refreshing all the list a couple of time a second, this causes the UI to be very laggy when some animations need to happen.

I was wondering what the best way is to update multiple lists with multiple value changes every second?

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Android :: Update Listview After Thread Loaded Data From The Net

Mar 16, 2009

I like that my GUI appears immediatly when the User starts the APP. Than some Data (text, Pictures) come loaded in the Background (like Youtube APP) The Listview and Gallery comes updated automaticly with this new Data.

I initiate my Listview, start a Thread and load the Data....and than the Listview does not come updated!!
Several People write I should use notifyDataSetChanged(). But I can not place this Command in my Thread (just unknown).

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Android :: Resetting The ListView After Adapter's Data Was Changed

Nov 21, 2010

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 ?

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Android : Want To Reload Data In ListView When Change Orientation

Nov 17, 2010

I have a listview that Display some Categories on it from my server, it works fine but when i change Orientation it Reload it...

What Should i do to Avoid Reload ?

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Android : Using A ListView - An Adapter - How To Use Notify Data Set Changed()

Jun 3, 2010

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"?

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Android :: Bind Data To ListView Without Preparing ArrayLists For ListAdapter?

Sep 14, 2010

I 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++) {....................

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Android :: Optimization Proposals For ListView With Data From Multiple Tables

Aug 18, 2010

I just encountered the following situation. I have an Android app with a scenario which I guess may happen in multiple apps. It's about tagging/labeling/categorizing, call it as you want.After CommonsWare's feedback here a bit of a clarification. I'm weird about doing the second query to the DB inside the CursorAdapter, basically this would result in one query per row and I fear this will heavily impact my performance (I've still to test it on a real device with a substantial amount of data to see how much this impacts).My question therefore is on whether there are some strategies on how to avoid this given my data model or whether I have to basically "live" with that :)

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Android :: Adding Items To Data Source Doesn't Appear In ListView

Aug 29, 2010

I am adding items to my data source and would like it to appear in my ListView.

For some reason nothing is appearing:

Adapter:

CODE:.........

Adding items in onCreate:

CODE:...............

Here is my layout:

CODE:..................

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Android :: ListView For XML Data - Existing Array Or Database Cursors

Mar 16, 2009

Where could I find any examples of rendering XML data in a ListView? i.e, the model is read from a XML file, not in an existing array or database cursors.

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Android :: How To Filter ListView Data When Typing On EditText In Droid?

Oct 29, 2009

I have a ListView and a EditText. How can I filter ListView data when typing on EditText ?

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Android :: Show Cursor Data In A Listview With Subsection Headings

Feb 3, 2010

I have not found an example yet with a solution to the following task.

I have a SQLite database with two tables- BOOK and AUTHOR. I execute a query on the DB that uses a join and results in a cursor that looks like this. code...

New authors and books can be added to the database at any time, and I also need the user to be able to remove books, hence the [ ] checkboxes.

So i have two row layouts, row_author.xml & row_book.xml. I detect when I need to show a row_author subheading by seeing when the current author has changed compared to the previous row. But I have realized that the rendering of an Author Row will then move the cursor forward one row and jump over their first book.

Can anyone suggest a good approach to presenting data like this? Is there a much better way to do this?

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