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.
View 3 Replies
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:.................
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).
View 1 Replies View RelatedI 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:................
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:.................
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
View 4 Replies View RelatedI 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:............
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.
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.............
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.?
View 2 Replies View RelatedI 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?
View 4 Replies View RelatedHow 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.
View 5 Replies View RelatedI 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:.........................
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?
View 1 Replies View RelatedI 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:...............
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?
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...
View 1 Replies View RelatedI 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;
} }
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:...................
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?
View 22 Replies View Relatedmade 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.
View 1 Replies View RelatedI 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(); } };
How to load data in expandable List Adapter through Scroll .
Means I want to add data as per Scrolling in Run time.
I would like to write a rather simple content application which displays a list of textual items (along with a small pic).I have a standard menu in which each menu item represents a different category of textual items (news, sports, leisure etc.).Pressing a menu item will display a list of textual items of this category.Now, having a separate ListActivity for each category seems like an overkill (or does it?)
Naturally, it makes much more sense to use one ListActivity and replace the data of its adapter when each category is loaded.My concern is when "back" is pressed. The adapter is loaded with items of the current category and now I need to display list of the previous category (and enable clicking on list items too)
Since I have only one activity - I thought of backup and load mechanism in onPause() and onResume() functions as well as making some distinction whether these function are invoked as a result of a "new" event (menu item selected) or by a "back" press.This seems very cumbersome for such a trivial usage.Am I missing something here?
The same code that displays the lists running on the emulator doesn't run on the mobile (Motorola Milestone). I'm using the same android platform (2.1-update).
Inbox Code...
TextView subject_textview = (TextView)rowLayout.findViewById(R.id.subject_textview);
subject_textview.setText(email.getSubject());
String body_hint = " - " + email.getBodyHint();
TextView bodyhint_textview = (TextView)rowLayout.findViewById(R.id.body_hint_textview);
bodyhint_textview.setText(body_hint);
String sender_name = get_sender_name(email.getSender());
TextView sender_name_textview = (TextView)rowLayout.findViewById(R.id.sender_textview);
sender_name_textview.setText(sender_name);
TextView date_time_textview = (TextView)rowLayout.findViewById(R.id.date_time_textview);
date_time_textview.setText(email.getTime());
Stack Trace
07-16 14:00:49.690: WARN/System.err(703): java.lang.ArrayIndexOutOfBoundsException
07-16 14:00:49.698: WARN/System.err(703): at com.anubis.mail.Inbox.populate_list(Inbox.java:237)
07-16 14:00:49.698: WARN/System.err(703): at com.anubis.mail.Inbox.onCreate(Inbox.java:69)
07-16 14:00:49.698: WARN/System.err(703): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-16 14:00:49.698: WARN/System.err(703): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
07-16 14:00:49.706: WARN/System.err(703): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
07-16 14:00:49.706: WARN/System.err(703): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
07-16 14:00:49.706: WARN/System.err(703): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
07-16 14:00:49.706: WARN/System.err(703): at android.os.Handler.dispatchMessage(Handler.java:99)
07-16 14:00:49.706: WARN/System.err(703): at android.os.Looper.loop(Looper.java:123)
07-16 14:00:49.706: WARN/System.err(703): at android.app.ActivityThread.main(ActivityThread.java:4363)
07-16 14:00:49.706: WARN/System.err(703): at java.lang.reflect.Method.invokeNative(Native Method)
07-16 14:00:49.706: WARN/System.err(703): at java.lang.reflect.Method.invoke(Method.java:521)
07-16 14:00:49.706: WARN/System.err(703): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-16 14:00:49.706: WARN/System.err(703): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-16 14:00:49.706: WARN/System.err(703): at dalvik.system.NativeStart.main(Native Method)
Currently I am working on IM, and I am facing problem during implementations. I am implementing this messenger using XMPP client and using smack API for implementing all features like contacts list, online offline status, and chat also. Prblem which I am facing:
Its my list view where I am showing contacts list
public class ContactsList extends ListActivity implements OnClickListener{
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ContactsManager manager = new ContactsManager(this); setListAdapter(manager);
} public class ContactsManager extends BaseAdapter{
private LayoutInflater mInflater; private Bitmap mainListIcons[];
private static ContactsInfo contactsInfo; public ContactsManager(Context context) {
mInflater = LayoutInflater.from(context); mainListIcons= new Bitmap[3];
mainListIcons[0] = BitmapFactory.decodeResource (context.getResources(), R.drawable.online);
mainListIcons[1] = BitmapFactory.decodeResource (context.getResources(), R.drawable.offline);
} @Override public int getCount() { return Global.contacts.size();//
contacts is vector where I am saving my contacts
} public Object getItem(int position) { return position;
} public long getItemId(int position) { return position;
} public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder; if (convertView == null) {
convertView = mInflater.inflate (R.layout.main_settings_lists_icon_text, null);
holder = new ViewHolder(); holder.mainListDisplayText = (TextView) convertView.findViewById(R.id.main_settings_lists_text);
holder.mainListDisplayIcon = (ImageView) convertView.findViewById(R.id.main_settings_lists_icon);
convertView.setTag(holder);}else{ holder = (ViewHolder) convertView.getTag();
} contactsInfo = (ContactsInfo)Global.contacts.elementAt (position);
String username = contactsInfo.getUsername(); String status = contactsInfo.getUserstatus();
if(status.equalsIgnoreCase("unavailable")) { older.mainListDisplayIcon.setImageBitmap(mainListIcons[1]);
}else{ holder.mainListDisplayIcon.setImageBitmap(mainListIcons[0]);
} holder.mainListDisplayText.setText(username); return convertView;
} static class ViewHolder { TextView mainListDisplayText;
ImageView mainListDisplayIcon;}
public class ContactsHandler implements RosterListener {
@Override public void entriesAdded(Collection<String> c) {
for(String s:c) { Log.i("ADDED Contacts",s);
} } @Override public void presenceChanged(Presence p) {
Log.i("PRESENCE",p.getFrom()); Log.i("IS Available",""+p.isAvailable());
Log.i("UserStatus",""+p.getStatus()); if(p.getFrom().contains("@") && p.isAvailable())
{ ChatManager chatmanager = Connection.getVopConnection getXMPPConnection().getChatManager();
Chat newChat = chatmanager.createChat("gulfam@imran-mehmood", new ChatHandler());
} } }
I have a list which shows data from a database using a cursor adapter. Using Menu option I am updating my database (inserting more rows deleting existing rows). When Menu operation completes, I want contents of list should show updated contents.
I have tried using cursor.requery(); (or explicitly querying cursor again) and using adapter.notifydatasetchanged(), but with this list of contents are not updated.
How can I refresh the contents of the list.
This has got me all confused! I'm trying to return the max value from a column in my database but the return value is always the name of the column.
The query I use:
private static final String SELECTMAX = "SELECT MAX(?) FROM " + TABLE_NAME ;
The (test) function to return the max value:
CODE:............
The column i'm querying is an INTEGER type but the result 's' is always the column name and not the desired value.
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 want to change the text color in R.id.c. How should, I go about with this.
This is what I have so far :
COD:...............
the error in my logcat is such Logcat
08-29 08:20:57.961: ERROR/AndroidRuntime(1766): java.lang.RuntimeException: Unable to start activity ComponentInfo{one.two/one.two.Booking}: java.lang.IllegalArgumentException: column '_id' does not exist
08-29 08:20:57.961: ERROR/AndroidRuntime(1766): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2268)
08-29 08:20:57.961: ERROR/AndroidRuntime(1766): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2284).................