Android :: No Data Appearing In ListView - Using SimpleCursorAdapter
Jul 26, 2010With the below code, nothing appears in the ListActivity as I would expect.
No errors are shown in logcat.
CODE:..............
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Android :: Filtering SimpleCursorAdapter ListView
Feb 27, 2010Since the query that comprises my ListView basically gets the rowID, name, and a third column from my databases's table, I want to be able to filter the cursor based on the partial value of the name column. However, I am uncertain of whether I can do this directly from runQuery without expanding my DB class since I want to filter the existing cursor, or will I have to create a new query function in my DB class that partially searches my name column, and if so, how would I go about creating the query statement while using the CharSequence constraint argument in runQuery?I am also concerned about the performance issues associated with trying to run multiple queries based on partial text since the DB table in question has about 1300-1400 rows. In other words, would I run into a bottleneck trying to filter the cursor?
View 1 Replies View RelatedAndroid :: Jerky Scrolling When Using SimpleCursorAdapter With ListView
Jul 23, 2010I'm getting some very jerky scrolling while using the code below to create a ListView from a Cursor. Is there something I'm doing wrong, or any way to improve the performance of this ListView?
CODE:.............
Note: bookmarkStore.getCursor() returns an unmanaged cursor from a sqlite database containing the columns from bookmarksColumns.
Android :: Way To Text Filter A Listview Based On A Simplecursoradapter?
Jan 4, 2010I have a ListView that is backed by a SimpleCursorAdapter. I'd like to be able to filter the list like you would a contacts list, just by typing, and I came across the textFilterEnabled() Problem is, I couldn't see how to get it to work with a SimpleCursorAdapter. Is this even possible?
View 1 Replies View RelatedListview Simplecursoradapter Move To Record?
Dec 8, 2013 My app is mainly made up of a listview linked to a simplecursoradapter (custom one I might add) which in turn uses a cursor which gets the data fed in from a dbadapter class.
using the dbadapter class I can retrieve data using the rawquery and query methods no problem. However I am trying to allow the user to enter a month in and then the app will scroll to that month in the list , instead of the user having to scroll through several months to get there.
This is where I am struggling, I have tried to move to the position within the original cursor and then calling changeCursor from the simplecursoradapter with no luck and tried using the listview with smothscrolltoposition again with no luck and even tried to notifydatachangedset (probably got that named wrong) and then within the custom simplecursoradater try and move to it but that does not work either.
Android :: Computation On Db Data Then List Them Using Either SimpleCursorAdapter Or ArrayAdapter
Apr 23, 2010I juststarted programming in android a few weeks ago, so I am not entirely sure how to deal with listing values. I have some questions regarding displaying data sets from db in a list. Currently I have a cursor returned by my db points to a list of rows and I want display 2 columns values in a single row of the list.
The row xml looks like this:
CODE:...............
so I was thinking using simplecursoradapter which supposedly makes my life easier by displaying the data in a list. However that is only true if I want to display the raw data. For the purpose of my program I need to do some computations on the raw data sets, then display them. I am not sure how to do that using SimpleCursorAdapter.
Here's how I display the raw data:
CODE:.........
Is there a way to do computation on the data in those rows before I bind it with the SimpleCursorAdapter? I was trying to use an alternative way of doing this by using arraylist and arrayadapter, but that way I dont know to how achieve displaying 2 items in a single row.
This is my code for using arrayadapter which only display 1 text in a row instead of 2 textviews in a row:
CODE:.......
It's very obvious that it only displays one textview in a row because I set the second arrayadapter overwrites the first one! I was trying to use R.id.text1 and R.id.text2 for them, but it gave me some errors saying 04-23 01:40:58.658: ERROR/AndroidRuntime(3309): android.content.res.Resources$NotFoundException: Resource ID #0x7f070008 type #0x12 is not valid.
Android :: ListView Items Appearing Under Tab
Aug 16, 2010When this displays the first two rows of the listview appear under the tabs, the Mercury, and Venus planets. How do I get the tabs to occupy the top and the listview rows to start after the tabs?
tablistmenu.xml:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/textview1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="" />
<TextView
android:id="@+id/textview2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="" />
<TextView
android:id="@+id/textview3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="" />
<TextView
android:id="@+id/textview4"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="" />
</FrameLayout>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@+id/lstMain"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ListView>
</LinearLayout>
</TabHost>
tablistmenu.java: public class tablistmenu extends TabActivity {
private ListView mainListView ;
private ArrayAdapter<String> listAdapter ;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.tablistmenu);
TabHost mTabHost = getTabHost();
mTabHost.addTab(mTabHost.newTabSpec("tab_test1").setIndicator("Contacts", getResources().getDrawable(R.drawable.contact_32)).setContent(R.id.textview1));
mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("Credit Cards", getResources().getDrawable(R.drawable.credit_card_32)).setContent(R.id.textview2));
mTabHost.addTab(mTabHost.newTabSpec("tab_test3").setIndicator("Notes/Misc", getResources().getDrawable(R.drawable.notes_32)).setContent(R.id.textview3));
mTabHost.addTab(mTabHost.newTabSpec("tab_test4").setIndicator("Websites", getResources().getDrawable(R.drawable.globe_32)).setContent(R.id.textview4));
mTabHost.setCurrentTab(0);
// Find the ListView resource.
mainListView = (ListView) findViewById( R.id.lstMain);
// Create and populate a List of planet names.
String[] planets = new String[] { "Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"};
ArrayList<String> planetList = new ArrayList<String>();
planetList.addAll( Arrays.asList(planets) );
// Create ArrayAdapter using the planet list. listAdapter = new ArrayAdapter<String>(this, R.layout.simplerow, planetList);
// Set the ArrayAdapter as the ListView's adapter. mainListView.setAdapter( listAdapter );
// End
} } }
Android :: Text Not Appearing In My ListView
Nov 19, 2010I have a ListView that is being populated. I have checked the contents of the datasource and it contains valid data. Unfortunately, the number of rows is correct, but the text I want to display is not appearing. Here is how I am setting up the ListView: Code...
View 2 Replies View RelatedAndroid :: Add Data Into The Listview
Nov 24, 2010My 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.
View 1 Replies View RelatedAndroid :: Way To Show Data On Listview?
Jul 23, 2010Here is my Arrival.Java. May i know why isn't there any data being shown on my ListView?
View 2 Replies View RelatedAndroid :: How To Add Data To An Empty ListView?
Jul 6, 2010I 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?
View 1 Replies View RelatedAndroid :: Using OnListItemClick With Data Driven ListView
Jun 25, 2010I 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.
View 1 Replies View RelatedAndroid :: Contacts / Numbers Data To ListView
Mar 31, 2010Does 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.................
Android :: ListView With Complex Data Model
Oct 20, 2009I'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...
Android :: ListView Data Binding From XML Parser
Aug 17, 2009I 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?).
View 8 Replies View RelatedAndroid :: Getting Data From SQlite And Place In Listview
Sep 7, 2010How to get data from SQLite which contains some data. How to place it(the data) in the listview.
View 2 Replies View RelatedAndroid :: Converting Sql Data Before Presenting It In ListView
Sep 30, 2010I'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?
Android : Getting Stored Data From My Database Into ListView
Jun 22, 2010package 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...
Android :: Getting Updated Array Of Data From ListView / Adapter
Aug 10, 2010I 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 RelatedAndroid :: Construct Grouped Data And Display Of ListView
Dec 27, 2009How 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.
Android :: Need Efficient Data Mappings Example For ListView Drill Down
Oct 12, 2010I'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?
View 1 Replies View RelatedAndroid :: Binding Data From Database To Checkbox In ListView?
Oct 1, 2009I'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.
Android :: How To Fill A ListView (in Droid) With XML / JSON Data?
Feb 9, 2010I read a tutorial, and it uses SQLlite and "SimpleCursorAdapter" to fill the list with items. This is the code...
View 1 Replies View RelatedAndroid :: Resetting ListView After Adapter's Data Changed
Nov 21, 2010I 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 ?
Android :: ListView ArrayAdapter Data Updates Best Practices
Aug 26, 2010I 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?
Android :: Update Listview After Thread Loaded Data From The Net
Mar 16, 2009I 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).
Android :: Resetting The ListView After Adapter's Data Was Changed
Nov 21, 2010I 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 ?
Android : Want To Reload Data In ListView When Change Orientation
Nov 17, 2010I 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 ?
Android : Using A ListView - An Adapter - How To Use Notify Data Set Changed()
Jun 3, 2010Just 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"?
Android :: SimpleCursorAdapter
Jun 25, 2009I am trying to pull data from a cursor which is initialized as follows:
Uri inboxUri = Uri.parse("content://sms/"); Cursor c = managedQuery(inboxUri, null, null, null, null);
This effectively gets me to latest text message that has been sent/ received. I am now trying to put certain fields into a listView, but need to format them before displaying them. The date is represented in the table in milliseconds and I want to convert it to a date before placing it in the list.
Here is where I am trying to place the date in my list. How can I format these fields before placing them into my listview?
CODE:.......................