How to dynamically remove items from ListView on a button click?

Question

I am working on an app that requires removing items from a ListView on a button event.

I tried to remove it from ArrayList and create the whole new adapter and load the list again. As my list is huge, doing this will affect the performance of my app. So I was wondering if there is any other way by which I could remove an item from my list dynamically.

Edit: I tried what you said.

When I removed one item it worked perfectly, but as I increase the number of selected items it starts giving me IndexOutOfBoundException.

Here's my code:

public void onClick(View view)
{
    SparseBooleanArray checkedPositions = new SparseBooleanArray();
    checkedPositions.clear();
    checkedPositions = lv.getCheckedItemPositions();
    int size = checkedPositions.size();
    if(size != 0)
    {

        for(int i = 0; i <= size; i++)
        {
            if(checkedPositions.valueAt(i))
            {
                list.remove(notes.getItem(checkedPositions.keyAt(i)));
                notes.notifyDataSetChanged();
            }
        }
    }
        else{}
}

Here, notes is a reference to an object of SimpleAdapter.

Octavian Helm · Accepted Answer · 2011-03-31 09:40:30Z

52

Well you just remove the desired item from the list using the remove() method of your ArrayAdapter.

A possible way to do that would be:

Object toRemove = arrayAdapter.getItem([POSITION]);
arrayAdapter.remove(toRemove);

Another way would be to modify the ArrayList and call notifyDataSetChanged() on the ArrayAdapter.

arrayList.remove([INDEX]);
arrayAdapter.notifyDataSetChanged();

edited Mar 31, 2011 at 9:40

answered Mar 31, 2011 at 9:18

Octavian Helm

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7 Comments

Buda Gavril Over a year ago

you have to add arrayAdapter.notifyDataSetChanged()

Octavian Helm Over a year ago

Well if you work with the ArrayAdapter directly you don't have to but if you work with the ArrayList you have to.

Varundroid Over a year ago

unfortunately i am using SimpleAdapter instead of ArrayadAdapter. so is there any way to remove item from SimpleAdapter like the way u mentioned above? or do i need to use ArrayAdapter insted of SimpleAdapter?

Octavian Helm Over a year ago

ArrayList is a concrete class whereas List is the interface. You can't instantiate a List but only a type implementing it. I'm quite certain you are working with an ArrayList.

RyanWang Over a year ago

the first way can only remove the last item, why?

|

Suraj Bajaj · Accepted Answer · 2012-09-23 19:42:30Z

5

This worked for me. Hope it helps someone. :)

SimpleAdapter adapter = (SimpleAdapter) getListAdapter();
this.resultsList.remove((int) info.id);
adapter.notifyDataSetChanged();

answered Sep 23, 2012 at 19:42

Suraj Bajaj

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Comments

Uday · Accepted Answer · 2011-03-31 09:46:51Z

4

adapter.remove(arraylist.get(position));
adapter.notifyDataSetChanged();

or you can call again

setListAdapter(adapter)

edited Mar 31, 2011 at 9:46

answered Mar 31, 2011 at 9:40

Uday

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3 Comments

Octavian Helm Over a year ago

Why should he do that in the getView() method?

Uday Over a year ago

(its not must) If he wanna remove item at position..or else if he wanna remove at statically he can use anywhere..

Octavian Helm Over a year ago

I think you got dynamically and statically mixed up now.

user665270 · Accepted Answer · 2012-04-18 04:40:03Z

Have a button on list and let it onclick feature in xml like to get postion first

public void OnClickButton(View V){
  final int postion = listView.getPositionForView(V);
    System.out.println("postion selected is : "+postion);
Delete(postion);

}
public void Delete(int position){
    if (adapter.getCount() > 0) {

        //Log.d("largest no is",""+largestitemno);
        //deleting the latest added by subtracting one 1 
        comment = (GenrricStoring) adapter.getItem(position);
        //Log.d("Deleting item is: ",""+comment);
        dbconnection.deleteComment(comment);
        List<GenrricStoring> values = dbconnection.getAllComments();
        //updating the content on the screen
        this.adapter = new UserItemAdapter(this, android.R.layout.simple_list_item_1, values);
        listView.setAdapter(adapter);
    }
    else
    {
        int duration = Toast.LENGTH_SHORT;
        //for showing nothing is left in the list
        Toast toast = Toast.makeText(getApplicationContext(),"Db is empty", duration);
        toast.setGravity(Gravity.CENTER, 0, 0);

        toast.show();
    }

}

kometen · Accepted Answer · 2023-03-22 11:19:32Z

1

private List<DataValue> datavalue=new ArrayList<Datavalue>;

@Override
public View getView(int position, View view, ViewGroup viewGroup) {
    view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            datavalue.remove(position);
            notifyDataSetChanged();
        }
    });
}

edited Mar 22, 2023 at 11:19

kometen

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answered Oct 17, 2016 at 4:49

Divyesh Patel

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Comments

MindBrain · Accepted Answer · 2015-02-07 13:37:14Z

0

 List<String> entries;
 private ArrayAdapter<String> categoryAdapter;
 //Your list of entries {Example: <"category1","category2","category3">}
 entries =  new ArrayList<String>();
 categoryAdapter = new ArrayAdapter<String>(ViewBeaconsActivity.this,
                                   android.R.layout.simple_list_item_1, entries);
 //Remove that specific category from the list
 entries.remove(categoryName);
 //Notify the adapter that your dataset has changed.
 categoryAdapter.notifyDataSetChanged();

answered Feb 7, 2015 at 13:37

MindBrain

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Comments

Nadhir Titaouine · Accepted Answer · 2015-05-29 02:53:25Z

You can remove item from list view like this: or you can choose on your Button event which item have to be removed

public class Third extends ListActivity {
private ArrayAdapter<String> adapter;
private List<String> liste;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_third);
     String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
                "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
                "Linux", "OS/2" };
     liste = new ArrayList<String>();
     Collections.addAll(liste, values);
     adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, liste);
     setListAdapter(adapter);
}
 @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
     liste.remove(position);
     adapter.notifyDataSetChanged();
  }
}

zxul767 · Accepted Answer · 2015-07-18 00:56:15Z

As for your last question, here's the problem illustrated with a simple example:

Let's say that your list contains 5 elements: list = [1, 2, 3, 4, 5] and your list of items to remove (i.e. the indices) is indices_to_remove = [0, 2, 4]. In the first iteration of the loop you remove the item at index 0, so your list becomes list = [2, 3, 4, 5]. In the second iteration, you remove the item at index 2, so your list becomes list = [2, 3, 5] (as you can see, this removes the wrong element). Finally, in the third iteration, you try to remove the element at index 4, but the list only contains three elements, so you get an out of bounds exception.

Now that you see what the problem is, hopefully you will be able to come up with a solution. Good luck!

Delmirio Segura · Accepted Answer · 2014-08-28 01:49:38Z

-1

<ImageView
    android:id="@+id/btnDelete"
    android:layout_width="35dp"
    android:layout_height="match_parent"
    android:layout_alignBottom="@+id/editTipo"
    android:layout_alignParentRight="true"
    android:background="@drawable/abc_ic_clear"
    android:onClick="item_delete_handler"/>

And create Event item_delete_handler,

answered Aug 28, 2014 at 1:49

Delmirio Segura

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