Android :: Multiple Column List/grid With Adapter And OnItemClickListener
Jun 19, 2010
I have a simple grid with rows of items and columns of options on each item. Of course I can manually link OnClick actions to cell items through specific resource IDs:
CODE:.............
What I'd prefer to to is use a ListView or a GridView and an Adapter. Is there a way to get cell id's from one of those? I was hoping that ListView setOnItemClickListener() would call me with the view id of a view within row 'position': onItemClick(AdapterView parent, View view, int position, long id) { ... }
But no go. Maybe a different approach?
Update:
I started with this:
CODE:.............
I'd assumed that I couldn't go into my Adapter and set child view OnClickListeners. Bad assumption. When I went back at this I gave it a try:
CODE:.................
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Feb 2, 2009
I am trying to use a list adapter. While querying, i need to have a column called "_id" which helps to scroll through the database. I have an other primary key in this table. Can I use a custom column name, or am i bound to the "_id" column.
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Jun 2, 2010
I've been implementing a number of custom-lists, all worked fine. Now I'm trying to add an EditText to the list's rows. When constructing the list I set an ItemClickListener for the list with listView. setOnItemClickListener(onItemClick);. This used to work fine but fails as soon as there is an EditText in the list rows.
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Aug 9, 2010
What I want is a central column using Grid View, but everything I try does not work. It always aligns to the left. I have tried messing around with layout_gravity and gravity to no avail. I have a Grid View in a Linear Layout:
<Linear Layout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent".
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Oct 28, 2010
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...
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Nov 3, 2010
I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).
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Nov 16, 2010
I would like to improve the load of my activities in my Android app. Every activity is either a GridView, a List or a Gallery. My questions is : How can I load only what's displayed ? Let's say I have to display a list of 500 songs (The same with a grid of 500 pictures), and each cell includes the Thumbnail, title and lenght. How can I know which one is currently displayed? I don't know if I made myself clear, if not please jut let me know.
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Dec 2, 2009
I am having multiple choice list where I have three column like below ************************* Col1 Col2 Col3 ************************* Col2 and Col3 should be right aligned with a gap of 10 px in between
code:................
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Oct 6, 2010
I am trying to get a multiple column list view. The hello in the picture is the second column i m trying to achieve.
Here is the link to picture. http://www.flickr.com/photos/34403563@N02/5057967965/
Here is my xml code, if someone can help me with xml properties for label 3 it would be quite helpful.
code:.................
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Jul 28, 2009
Hi, I am looking for a way to create a Microsoft data grid style list in android. But I am wondering is there any available built in component capable of doing this job such as listview? Thanks
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Aug 12, 2009
I have a bit of code that takes a list of contact ID's that have been selected and return a cursor with other data I might be interested in for those ID's.
CODE:............
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Oct 7, 2010
I did get the issue of how to get second column resolved by your help. Now I am not able to understand how to get the word hello which is the second column horizontally aligned in a straight line.
http://www.flickr.com/photos/34403563@N02/5058549047/
Here is my xml code
code:............
I have been getting opinions that I should have gone for table layout could someone please save me from doing the work from scratch. I really dont want to do everything again. Thanks and sorry for the posts. Trust me this problem is different than last one.
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Oct 6, 2010
I would like to have my list activity to display 2 items(title, content) in a single row. I have almost 10 rows to display like that. And I want the width of the columns to be equally spread out. I tried with linear layout and table layout, but I could not bring the columns equally sized. I am using the following layout. kindly help me and advice me on this....
code.............
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Nov 24, 2010
I have created a table named train_table in SQLite database with 3 columns. they are train_id, train_no and train_name. Now, i wrote a class in which i displayed the train_name in a list view. how do i get the related train_no in the next page? can anyone help me in sorting this problem.?
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Nov 15, 2010
I have a custom layout with a lot of Views. Currently, I build the entire view hierarchy in the on Create, though I stream the actual work in small batches. This works OK up to about 1000 Views and then performance degrades a little. Obviously, I'd like to use the List Adapter pattern and only generate the parts of the View hierarchy that are visible on the screen. My parent View, however, is not (and cannot be) any of the existing List View types. My question, then, is how do the List View types interact with a List Adapter to limit the number of Views necessary to represent a big list? More broadly, is there a pattern out there for extending a Linear Layout to create special List Views?
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Apr 23, 2010
I'm trying to create a multiple selection list where the selection is represented graphically rather than with checkboxes.My list has checkboxes, but I want them to serve a different purpose. I'm using a cursor to hold my data and created a custom view binder for the SimpleCursorAdapter. I did this for the checkboxes and general flexibility.So far I haven't even been able to show one line as being selected. I've enabled multiple selection on the list and denied the children of the list item focusability. I've tried manually changing background color with the position fed in through the list item click listener. But the wrong items get changed and they don't even change to the right color. I've enabled touch focusability with no improvement either.Ideally, I'd like the trackball highlight focus bar to appear in multiple places. But I don't think this is possible unless you use the drawable directly. But I don't know how to find or apply it. My next idea was to have a slim view bar that changes color. But I had the same problem with the wrong item being selected so I never finished trying to guess the index position to see if this would work. My most recent idea is to completely swap out the view for another one if it's selected. But I have no idea how to do this either. I'm thinking of using an array list to store the _id s of the items that need a different view to get around the wierd selection problem. I'm also thinking of passing in the ID field as my from and the selection view as the to for my adapter. Then I'd intercept it with my binder and change the view accordingly. But once again, I'm not sure how to do this successfuly.
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May 20, 2010
I have a ListView with custom ArrayAdapter. Each of the row in this ListView has an icon and some text. These icons are downloaded in background,cached and then using a callback, substituted in their respective ImageViews. The logic to get a thumbnail from cache or download is triggered every time getView() runs.
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Aug 28, 2009
How i get the Selected item from the list Adapter.In this above code if i selected March from the Dropdown Adapter means then how can i retrieve the Manth March to show in a textview.
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Nov 5, 2010
I have been playing around with a LazyList code sample which is pretty neat for displaying images in a safe and non-memory-hogging way. It uses a very simple mechanism of displaying images based on a list that exists within the class file.
Example:
CODE:...........
I am trying to load these values from an index file that is downloaded to the SD card, and then loaded from it. Here is the code that loads the index file and simply displays it as a Toast message (this works fine).
PULL FILE FROM SD CARD
CODE:.........
What I am struggling with is how to take this string that is being loaded from the SD card and pass it into the list adapter.
The code presently looks like this:
CODE:................
I am trying to reload or refresh that same adapter using the values I pulled from the SD card file, presently called "readString".
Can anyone give me some pointers? I am leaving out the code that I created that doesn't work ... because I don't think I am handling this at all correctly. Also - go easy on my, I am a complete newbie to all of this. :-)
Here is my what I am trying to do. Simply copy and paste the working code where I want it. I know it's not that simple, but I am having a hard time reconstructing it properly. Here is my edited code ...
PULL FILE FROM CARD ATTEMPT #2
CODE:..........
The error that I get on "adapter=new LazyAdapter(this, readString);" is "The constructor LazyAdapter(new View.OnClickListener(){}, String) is undefined".
Having not shared the contents of LazyAdapter, that information may not be helpful. So here is the LazyAdapter class in it's entirety ...
CODE:.........................
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Jan 12, 2010
I have the following code to intantiate a SimpleCursorAdapter to use with a ListView. As you can see I have passed the R.layout.log_item to display the list items, and one value/control to bind to (TripDate).
SimpleCursorAdapter sca = new SimpleCursorAdapter(this, R.layout.log_item,c,new String[] {DBAdapter.KEY_LOG_TRIPDATE},new int[]{R.id.txtTripDate});
This works. I currently only have one widget in the layout xml, a TextView to hold the TripDate.
How do I pass multiple binding parameters for the additional widgets in the layout? So I can also display other info.
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Oct 5, 2010
I have a ListView which is populated using a CursorAdapter. I'd also like to have some separators in my ListView. I have accomplished this with an ArrayAdapter, but I'm not sure how to accomplish this with a CursorAdapter. Are there any strategies for doing so? Or am I out of luck?
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Jun 9, 2010
I have table with 3 columns which is binded to an XML document with three text views.
CODE:........
Depending on the value store in the third column, I have to decide whether i should display this row or not
How should, I go about with this.
This is what I have so far :
CODE:...............
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Jul 12, 2010
I am calling one webservice.Result of webservice I am storing in an Array list. Result of webservice I want to display as list view. For ListView I am using SimpleAdapter. and SimpleAdapter is something like this:- SimpleAdapter adapter = new SimpleAdapter(this,hashmap, layout, from, to);
I am not able to put array list into hashmap. Is there anyway to do this?
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Sep 10, 2010
I have a custom list adapter contains a layout with controls in it. I was wondering how I can get each individual controls id? I am planning on changing the color of some textviews. code...
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Mar 25, 2010
I have a ListView with a custom Adapter that extends ArrayAdapter. It's ArrayAdapter of Type Artist. (There are about 1200 artists in my list). Artist is a very small class that has a name and an id. The Artist Class has toString() overridden to return just the name. I have an EditText. The EditText has an TextChangeListener where I call .getFilter().filter(chars, callback) on my adapter. In the Filter.Filterlistener().onComplete() callback i print the count and it looks really good. As i type the count decreases. So it seams everything works as advertised, but the List stays the same. I tried to call artistAdapter.notifyDataSetChanged() to force the list to redraw, but nothing happens. [see 2.)]. I am tinkering around for days now! I am desperate. Hopefully someone can have a look on my code and tell me what I am doing wrong! How can I force the list to be redrawn?
Here is what I have done:
1.) Defined a ListView and an EditText like this:
<EditText xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/list_search_text"
android:layout_width="fill_parent"
android:layout_height="35dip"
android:layout_below="@id/header">
</EditText>
<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/list_search"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</ListView>
2.) Setup my ListView in the Activities onCreate():
private ListView listView = null;
private ArtistAdapter artistAdapter = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_artists);
artistAdapter = new ArtistAdapter(this, R.layout.row, list); // 'list' is an ArrayList<Artist>
listView = (ListView) findViewById(R.id.list_search);
listView.setAdapter(artistAdapter);
listView.setFastScrollEnabled(true);
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> av, View v, int position, long id) {
// do something } });
EditText txtSearch = (EditText) findViewById(R.id.list_search_text); txtSearch.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable arg0) { }
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
public void onTextChanged(CharSequence chars, int start, int before, int count) {
artistAdapter.getFilter().filter(chars, new Filter.FilterListener() {
public void onFilterComplete(int count) {
Log.d(Config.LOG_TAG, "filter complete! count: " + count);
artistAdapter.notifyDataSetChanged();
}});
}});
}
3.) This is my ArtistAdapter in short. I added an remove() and add() method:
public class ArtistAdapter extends ArrayAdapter<Artist> implements SectionIndexer {
private List<Artist> items;
/* other stuff like overridden getView, getPositionForSection,
getSectionForPosition and so on */
@Override
public void remove(Artist object) {
super.remove(object);
items.remove(object);
}
@Override
public void add(Artist object) {
super.add(object);
items.add(object);
} }
4.) My artist has also the toString() overridden:
public class Artist implements Comparable<Artist> {
public String uid;
public String name;
public Artist(String id, String name) {
this.uid = id;
this.name = name; }
public int compareTo(Artist another) {
return this.name.compareToIgnoreCase(another.name);
}
@Override
public String toString() {
return this.name;
} }
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Jul 13, 2009
I am struggling with applying a forced line break in the xml layout when using a simple list adapter. The data for the list adapter is being pulled from an sqlite db.
Here is the code:
CODE:.................
And here is the R.layout.item xml:
CODE:...................
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Jun 2, 2009
I developed a List View with a custom adapter (which extends Array Adapter). The problem is that i can't selected or highlighted items. Is there a attribute to fix in the list View Layout or something else?
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May 11, 2010
made a custom list adapter extending the Base adapter. Each item in the list has an imagebutton, 2 textviews and a button. I tried to add the context menu to the list so as to display some options for an item in the list. registerForContextMenu(getListView()); I used a MenuInflater object to inflate the context menu xml file. But on clicking the items in the list nothing shows up or the usual highlighting of the item of list on click isn't shown. Is it that the context menu doesn't work for custom list views? Any help would be much appreciated.
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May 29, 2010
I am extending BaseAdapter and trying to populate the List Screen on my Activity Screen. NotifyDataSetChanged is not working as expected. Please find the below snippet of code.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); initialize();
context = this; config = Config.getInstance();
searchText = new EditText(this); handler = new Handler() {
@Override public void handleMessage(Message msg) {
msgQueueAdapter.notifyDataSetChanged();
context.msgQueueAdapter.notifyDataSetChanged();
msgQueueAdapter.notifyDataSetInvalidated(); } };
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Oct 2, 2009
How to load data in expandable List Adapter through Scroll .
Means I want to add data as per Scrolling in Run time.
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