Android :: Get Number Of Selected Items In Android ListView
Oct 9, 2010I have a multiselection listview in my android app. What I need to know is how many items on that list I have selectet.
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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 :: How To Get Selected Items In A ListView - Multi Selection Check Boxes
May 10, 2010How do I get the selected items in a ListView which contains a multi selelected check boxes.?
The following code doesn't work correctly... getContacts() is being called in a Button click().
CODE:..................
Android :: ListView Set Number Of Items To Show
Mar 4, 2010How can i set the number of items to show in a list without to scroll?
Example: I have a list with 10 items.
I want that only 3 items appears and that I have to scroll to see the rest of the items.
Android :: ListView Large Number Of Items - Best Practices
Oct 20, 2010I am working with a ListView, custom adapter and a large number of items. I read in a book for Android that is was more efficient to use what it called the holder pattern. That is to create a wrapper class for each view in the list view that cached the objects in the view so as to avoid calls to findViewById because those are supposed to be expensive. My question is what is better? To have 50,000 objects GC'd every time the user scrolls or to make the 4 or five calls to findViewById per view? Below is my implementation of what the book suggested.
@Override public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView; if (view == null) {
final LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.survey_item, null);
view.setTag(new SurveyItemWrapper(view));
} bindView((SurveyItemWrapper) view.getTag(), position);
return view; } private void bindView(SurveyItemWrapper surveyItemWrapper, int position)
{ final SurveyedItem surveyedItem = surveyedItems.get(position);
surveyItemWrapper.getDescription().setText(surveyedItem.getItemName());
surveyItemWrapper.getCube().setText(String.format("%9.2f", surveyedItem.getCube()));
surveyItemWrapper.getShipping().setText(String.format("%d", surveyedItem.getShipping()));
surveyItemWrapper.getNotShipping().setText(String.format("%d", surveyedItem.getNotShipping()));
} private class SurveyItemWrapper { private TextView description;
private TextView cube; private TextView shipping;
private TextView notShipping; private View view;
public SurveyItemWrapper(View view) { this.view = view;
} public TextView getDescription() {
if (description == null) { description = (TextView) view.findViewById(R.id.SurveyItemDescription); } return description;
} public TextView getCube() { if (cube == null) {
cube = (TextView) view.findViewById(R.id.SurveyItemCube);
} return cube; } public TextView getShipping() {
if (shipping == null) { shipping = (TextView) view.findViewById(R.id.SurveyItemShipping);
} return shipping;} public TextView getNotShipping() {
if (notShipping == null) { notShipping = (TextView) view.findViewById(R.id.SurveyItemNotShipping); } return notShipping; } }
Android :: ListView Scrolling - Array Contain Large Number Of Items
Jun 27, 2010I have a ListView with a scrolling issue. The Array contain a large number of items. When I try to scroll down, the listview displays the first items again. For example, if the initial view shows 12 items and I scroll down to view the next three, instead of showing 4 through 15, if shows 4 through 12 followed by 1, 2, and three. Debugging the Adapter reports that getView return 4 through 15 just as I would expect.
View 3 Replies View RelatedAndroid :: How To Update CursorAdapter Tied To Listview When Number Of Items Changes?
Aug 16, 2010I have a ListView backed by a custom adapter based on a CursorAdapter.The cursor I give it is based on a list of Notes in the database (each note is a DB row).Everything works just fine until I delete a note from the database. I'm not sure how to properly update the cursor/adapter/listview to display the new data.I've read conflicting posts on using adapter.notifyDataSetChanged() vs cursor.requery() to refresh the UI, but neither of them seems to work in this case.The only way I've been able to refresh it is by creating a new cursor from a new query and calling adapter.changeCursor(newCursor).Could someone demonstrate the proper way to update the backing data and then the UI (with psuedocode if possible).
View 2 Replies View RelatedAndroid :: Unable To Get Correct Selected Items
Apr 17, 2010I am to display the list and store the selected items in an array. But I am not able to get the correct items that were selected. Here whenever the user clicks an item, the array is getting updated, irrespective if the user is clicking the item to select it or deselect it. Could some one please help me solve this. I could actually perform an iteration to remove the odd numbered items in the array but I feel that would become an overload on the phone. Is there something for efficient. Please advise.
public class MainActivity extends ListActivity { TextView selection; String[] items={"sodium", "O2", "C02", "HCL", "NaCl", "H2So4", "O3", "Ag"}; String names[] = new String[10]; static int i=0; int posarray[] = new int[10]; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, items)); .........
Android :: List View With A Custom Adapter / Items Can't Be Selected
Jun 2, 2009I 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 RelatedAndroid :: Filtering Items In View Based On Value Selected In Spinner
Sep 29, 2009I am trying to change the items in a list view based on a value that gets selected in a spinner that is in the same activity. Is there a quick way to do filtering on the list adapter data based on that value, or should I go the long way of changing my adapter implementation for easy filtering?
View 2 Replies View RelatedAndroid :: Listview With Pre Selected Checkboxes
Nov 28, 2009I have a listview with some checkboxes. I want some of them to be prechecked when the activity starts. I have the positions of those checkboxes which needs to be pre selected.
View 2 Replies View RelatedAndroid :: How Do I Get Value Of Item Selected In ListView
Jun 3, 2010I thought I could use the position int, but when I click on the item in the list view, nothing happens. Please help. Code...
View 1 Replies View RelatedAndroid :: Listview's First Item Is Always Selected
Jun 8, 2010I'm using a custom view to display items in a listview. For some reason every time the list is populated; the first item is shown as selected (ie; orange highlight). I've tried everything I can think about to solve it; any ideas?
View 2 Replies View RelatedAndroid :: What Is Best Way To Get Item Selected In Listview
Jun 24, 2010I have a listview which has a bunch of selections. I want to keep the focus on the listview in touchmode and get the item selected. What is the best way to do that?
I found this blog:
http://bestsiteinthemultiverse.com/2009/12/android-selected-state-listview-example/ and
http://developer.android.com/resources/articles/touch-mode.html
What does the community suggest?
Android :: Need To Get Selected Item From ListView
Sep 11, 2010I need to get the selected Item from a ListView in adnroid .
View 1 Replies View RelatedAndroid :: Getting Selected Item From A ListView
Sep 14, 2010Please Help me for getting the selected Item from a ListView. Items for the ListView are getting from a xml file. Elements of the ListView are filled up by the adapter(adpter contains ImageView and textView). I only need the TextView content from the ListView.By using the onItemClick i get only the index of the item.
View 2 Replies View RelatedAndroid :: Selected Positions In A Listview
Aug 27, 2009How can I retrieve the positions of the selected item in a multichoice listView ? The getSelectedItemPosition method returns only the first one...
View 1 Replies View RelatedAndroid :: How To Get On Which ListView Has Been A ContextItem Selected
May 18, 2010I have an activity with three listviews, each having three different cursors, but all have the same ContextMenu show/resolve code and when the selection event fires, I want to get the ListView to refresh it.
I can't use menuInfo.targetView, as that holds the LinearLayout for the ListView row, and not the ListView.
in this method public boolean onContextItemSelected(MenuItem item)
How is possible?
Android :: ListView Stay Selected ?
Jun 24, 2010I have a list view full of items, after the users selects an item it lights up, and then it goes normal. Is there a way to make it so after the users select an item in my ListView it stays selected, and highlighted?
View 2 Replies View RelatedAndroid : Application Always Sends 2 Sms Messages To The Selected Number
May 10, 2010I have a application which send sms. but i found that the application always sends 2 sms messages to the selected number. couldn't figure out how is this happening. so i'll paste the code below if you have any suggestions just let me know
CODE:.......................
Android :: OnListItemClick - Get The Name Of Selected File In ListView
Feb 17, 2010I have a listview that shows files in a specified folder which works. But what I can't figure out is in the onListItemClick method. How can I get the name of the selected file in the ListView from the ArrayAdapter instead of the position or id?.......................
View 4 Replies View RelatedAndroid :: ListView Scroll To Selected Item
Aug 17, 2010I have a ListView with an edit text and a button below it. When I click on a listView item the keyboard appears and push up the edit text and the button. I want the list to scroll to the selected item.
View 2 Replies View RelatedAndroid :: Change View In ListView If Selected
May 13, 2009I'd like to create my ListView and make it's Views be changed while selected (or, clicked). How could I do it?
View 3 Replies View RelatedAndroid :: Prevent ListView Footer From Becoming Selected?
Oct 29, 2010I have a ListView which can be navigated with the dpad. It has a footer. I want to prevent navigation into the footer with the dpad. I have set focusable and focusableInTouchMode of the footer view itself to false; this makes no difference (so I deduce that it is not actually focus I am seeing, but rather selection).
How do I prevent the footer from becoming selected?
Android :: Can Not Get Text From A Selected Item In A Listview?
Mar 30, 2010I always get an ClassCastException error... i do not what else to do...
- I'm using a data biding concept to populated the listview from a sqlite3 database.
- I just want to get the selected item text after a long press click.
This is the code of the activity:
CODE:........
This is the xml where a define the rows to show on the listview:
CODE:.................
Android :: Set An Item As Selected When The ListView Opens?
Oct 8, 2010An activity has a Button and a ListView. Initially, only the Button is visible. When the button is pressed, the ListView is displayed. When displayed, is it possible for me to show one particular item as selected/focussed?
A use case could be that suppose it is a list of language settings and when the list opens, the currently selected language must be shown as highlighted. If I know the index of the item, how to set it as focused on display?
Android :: How To Style Selected Item In ListView
Oct 29, 2010I am an Android newbie trying to learn the UI side of things and it's doing my head in. Here's what I have right now:
CODE:.....
What I am struggling to figure out is how do I style the selected item? At the moment the selected item has a ghastly orange background which, under the rounded green rectangle, gives an orange outline effect.
Android :: Custom ListView Selected Item Children?
Oct 27, 2010I have a custom listview row that contains a number of textView components. Instead of the "standard" single text item, I have created a item where each listview row contains several bits of information. For this example, I have a record id, a name, and a description for each row in the listview. I have my listview populated via
this.mDbHelper = new RecordDBAdapter(this); this.mDbHelper.open();
Cursor c = this.mDbHelper.fetchAllRecords(); startManagingCursor(c);
String[] from = new String[] {RecordDBAdapter.ROW_ID, RecordDBAdapter.NAME,
RecordDBAdapter.DESCRIPTION};
int[] to = new int[] {R.id.recordId, R.id.lblName, R.id.lblDescription};
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter records = new SimpleCursorAdapter(this, R.layout.record_row, c, from, to); this.list.setAdapter(dives);
Now what I want is to be able to access the recordId value within each clicked item. I've tried to follow the Android tutorials to no avail. They do something like
Object o = adapter.getItemAtPosition(position);
but that still doesn't help either. What I really want is to get the value of the recordId within each selected listItem. Does anyone know how this would be accomplished? Here is my onItemClick event:
protected OnItemClickListener onListItemClick = new OnItemClickListener() {
@Override public void onItemClick(AdapterView<?> adapter, View view, int position, long rowId) {
// My goal is either to grab the value of the
// recordId value from the textView, or from the adapter.
//Object o = adapter.getItemAtPosition(position);
//Tried this, no joy
Intent intent = new Intent(NeatActivity.this, SomeOtherActivity.class);
// intent.putExtra("selectedRecordId",val); //val here is a numerical record row id being passed to another activity.
startActivity(intent); } };
Android :: How To Keep The Selected Item Of A ListView Vertically Centered
Nov 18, 20091) A ListView with many items (i.e. scrolling will occur at some point)
2) At the beginning, the selection is at the top (item #0)
3) User is scrolling down (i.e. we're not in touch mode)
4) For the first items, the selection is moving down without the list to scroll.
5) Once the selected item is reaching the middle of the list's viewport: the list starts to scroll-down.
6) Then, toward the end of the list: scrolling stops and the selection keeps moving down until the last item is reached.
It's a common feature in (keyboard-enabled) UI frameworks but I don't believe it's possible to achieve with Android, as for now... Right?
Android :: How To Pass Selected Item's ID From A ListView To An AlertDialog
Jul 20, 2009I have a ListActivity, and long-pressing on an item brings up a context menu. One item in the context menu is "delete", and that brings up a confirmation box (and AlertDialog). When the user presses OK in the confirmation dialog, I need to know the ID of the item that was originally selected, so that I can actually delete it.
The flow looks like this:
This event: Causes Android to call:
-----------------------------------------------------
Long press an item -> onCreateContextMenu()
Select context menu item -> onContextItemSelected()
call showDialog()-> onPrepareDialog()
user clicks OK -> onClick()
In onCreateContextMenu and onContextMenuSelected, I can get at the id of the selected item from the ContextMenuInfo. In onPrepareDialog, however, I no longer have access to that information. The rub is that onPrepareDialog needs this information to set up an onClick listener on its POSITIVE button.
I know that, during onContextMenuSelected, I can stash the selected item's ID away into a field of my activity. I have done that, and it works. But it's also really ugly. The statefulness that it introduces makes me uneasy. Has anybody else seen a better way to pass such information around than to use fields in the activity?