If I have a listview being populated with webservices and the elements added in each row have a unique id stored in the array list which utilizes a hashmap to store data,thn what would be the simplest way to obtain the id of the data,that was clicked in the row..
I am using a base adapter on my list,
Any help would be greatly appreciated.
set on item click listener on listview. it will return position of the clicked item in the adapter (equivalent to position in the array list). you can fetch the id using that.
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),String.valueOf(position), Toast.LENGTH_SHORT).show();
}
});
Third parameter is Position of Item in the list.
use this method listView.getItemAtPosition(position). It got a position you can use
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
// Get item at position like this:
// listView.getItemAtPosition(position));
}
});
if you use the adapter.getItem(position) function you'll be able to get the item stored in the ListView in that specific position.
update: this is of-course in the setOnItemClickListener
Related
I have a problem with receiving _ID value when an item is clicked on listView.
I have this code:
List<SavedSearch> values = mydb.getAllSavedSearches();
ArrayAdapter<SavedSearch> adapter = new ArrayAdapter<SavedSearch>(this,
android.R.layout.simple_list_item_1, values);
//adding it to the list view.
obj = (ListView)findViewById(R.id.listView1);
obj.setAdapter(adapter);
obj.setOnItemClickListener(new OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
And my problem is that i want in onItemClick to somehow get the _ID value from database of clicked item in listView. int position and long id both are returning just position on the list.
Thanks for help, and I can say that any of previous topics helped me.
If you're using a database I would suggest you do not use an ArrayAdapter and instead use a CursorAdapter. Then simply call the method getItemId() from your CursorAdapter to retrieve the id of an item at a given position. So, do this:
CursorAdapter adapter = new CursorAdapter(Context yourAppContext, Cursor yourDBCursor, false);
obj = (ListView)findViewById(R.id.listView1);
obj.setAdapter(adapter);
obj.setOnItemClickListener(new OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
adapter.getItemId(position); // This is the _ID value
}
This is just the suggestion. I am not sure this will solve the issue.
Method 1:
Whenever you load the listView just set the id for the row and you can get the id from onItemClikListener method
Method 2:
Add an texView (set visibility gone) and set text as your id and get id using getText() method
Note
Don't use position this is always changing when the listview is reCycling.
In my android application i'm having a list view and some items in that,now my requirement is when I select a particular item from that list the list item should be highlighted with a red color, and that selection should not be disappear because in my application i should choose an item from the list view and i should click a button(submit).
So in order to know to the user that he has selected an item from the list view it should be highlighted until he clicks submit button.
I have used choice Mode attribute and set the value to single choice and i have changed the color for highlighting everything works fine but i need it not to be disappeared until user clicks the submit button
The variable val consists of some names which i retrieved from database.
Please help me to solve this Thanks in advance.
ArrayAdapter<String> adptr= new ArrayAdapter<String>(this,R.layout.row,R.id.member_name,array);
lv.setAdapter(adptr);
lv.setOnItemClickListener(new OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> parent, View v, int pos,
long id) {
// TODO Auto-generated method stub
val=lv.getItemAtPosition(pos).toString();
//Toast.makeText(getApplicationContext(), val, 5000).show();
}
});
use OnItemClickListener
ListView lview = getListView();
int pos =0;
lview.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> adapter, View v, int position,
long arg3)
{
// set the background of v here
if (position == pos)
// reset the background color
// and pos = position;
else
get the previous listitem view and reset it's background to original
}
});
Actually I had the same problem sometime back. I was working on non touch andorid ui application for google tv.
The solution is like this.
1) create a custom ArrayAdapter (extending ArrayAdapter)
2) onItemClick get the position of the item.
3) send that position to your adapter by some public method say setCurrentPosition(int pos)
4) in getView() of the adapter check for the position and set the background to red for that view.
Hope this will work as it worked for me.
I am displaying an arraylist through a listactivity. Also, i have associated id's with these arraylist elements which i can get together in a hashmap maybe. But the problem is i want to obtain that particular id of the element when it is clicked. How to achieve that. Any help is appreciated.
You can return the id based on the clicked position if you an implementation of the getItemId(position) method in your adapter. The id you return here will be the long id argument in the onListItemClick(...) method of your ListActivity.
getItemId(int position) is a member of the ArrayAdapter class. The ListActivity will call that function from the adapter of yourListView. All you have to do is to provide the implementation, the rest will work out just fine.
http://developer.android.com/reference/android/widget/ArrayAdapter.html#getItemId(int)
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapter, View v, int position, long id) {
long pos=lv.getItemAtPosition(position);
//do your stuff here
}
});
if you are using your own ArrayAdapter, you can implement the getItem(position) method..
The answer that worked for me is as follows. Hope it maybe useful for others.
I had the data in Arraylist> testdata. I passed it like this :-
this.setListAdapter(new SimpleAdapter(Grammar_tab_start.this, testdata ,
.layout.tab_single_item, new String[] { "module_name"},
new int[] { R.id.from}));
ListView lv = getListView();
to single list item on click
lv.setOnItemClickListener(new OnItemClickListener()
public void onItemClick(AdapterView<?> parent, View view,
int position, long id)
{
Log.i("check","Module item clicked");
HashMap<String,String> pos=(HashMap<String, String>) lv.getItemAtPosition(position) ;
Log.i("check","----" + position + "id" + id +"actual is "+ pos.get("module_id"));
}
I used the lv.getItemAtPosition() function to retrieve the whole object that was clicked. And then took th eid part from it. Cheers.
Suppose we have this example:
http://techdroid.kbeanie.com/2009/07/custom-listview-for-android.html
with source code available here:
http://code.google.com/p/myandroidwidgets/source/browse/trunk/Phonebook/src/com/abeanie/
How can we modify a mobile phone number once clicked on the list item?
In the method onItemClick() get the PhoneBook element corresponding to the position(the position parameter) of the row clicked, update the value and then notify the adapter that the data has changed with a call to the method notifyDataSetChanged():
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View view, int position, long index) {
// make the adapter a field in your class (or final)
PhoneBook element = (PhoneBook) adapter.getItem(position);
//modify the PhoneBook element
element.setPhone("555-555-555");
// notify the adapter that something has changed
adapter.notifyDataSetChanged();
showToast(listOfPhonebook.get(position).getName());
}
});
I want to delete a selected item from the list view;
actually I want to perform this operation from the context menu. Everything is going fine but I'm not able to delete that item.
Please give me some suggestions or examples to remove item from the listview
I have used like this in my code, it can delete multiple items from the list
ListView lv_ArchivePartylist;
ArrayList<Parties> select_archived_party;
lv_ArchivePartylist = (ListView)findViewById(R.id.archive_ListView01);
lv_ArchivePartylist.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
// TODO Auto-generated method stub
if(view.findViewById(R.id.img_chkbox_archive).getVisibility()==TextView.GONE)
{
view.findViewById(R.id.img_chkbox_archive).setVisibility(TextView.VISIBLE);
Toast.makeText(ctx_archive, "Name="+archived_parties.get(position).getPartyTitle(), Toast.LENGTH_SHORT).show();
select_archived_party.add(archived_parties.get(position));
}
}
});
Then I've declared one button of "Delete" and on it's On ClickListener method, it calls the code from the database(In your case it may be Arraylist or array) to delete the items selected in Arraylist "select_archived_party". Hope it helps :-)