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remove listview items in android


remove listview items in android  using -'android,android-listview'

Can somebody please give me an example code of removing all ListView items and replacing with new items?

I tried replacing the adapter items without success. My code is

populateList(){

 results //populated arraylist with strings

 ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, results);

 listview.setAdapter(adapter);
 adapter.notifyDataSetChanged();
 listview.setOnItemClickListener(this);

}

// now populating list again

repopulateList(){

 results1 //populated arraylist with strings

 ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, results1);

 listview.setAdapter(adapter1);
 adapter1.notifyDataSetChanged();
 listview.setOnItemClickListener(this);
}


Here repopulateList() method will add to ListView items, but it doesn't remove/replace all ListView items.
    

asked Sep 21, 2015 by sujata naik
0 votes
46 views



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7 Answers

0 votes

You will want to remove() the item from your adapter object and then just run the notifyDatasetChanged() on the Adapter, any ListViews will (should) recycle and update on it's own.

Here's a brief activity example with AlertDialogs:

adapter = new MyListAdapter(this);
    lv = (ListView) findViewById(android.R.id.list);
    lv.setAdapter(adapter);
    lv.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView a, View v, int position, long id) {
        AlertDialog.Builder adb=new AlertDialog.Builder(MyActivity.this);
        adb.setTitle("Delete?");
        adb.setMessage("Are you sure you want to delete " + position);
        final int positionToRemove = position;
        adb.setNegativeButton("Cancel", null);
        adb.setPositiveButton("Ok", new AlertDialog.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                MyDataObject.remove(positionToRemove);
                adapter.notifyDataSetChanged();
            }});
        adb.show();
        }
    });
answered Sep 21, 2015 by vijayshukla80
0 votes

You can use

adapter.clear() 

that will remove all item of your first adapter then you could either set another adapter or reuse the adapter and add the items to the old adapter. If you use

adapter.add()

to add data to your list you don't need to call notifyDataSetChanged

answered Sep 21, 2015 by tushar2k6
0 votes

I think if u add the following code, it will work

listview.invalidateViews();

To remove an item, Just remove that item from the arraylist that we passed to the adapter and do listview.invalidateViews();
This will refresh the listview

answered Sep 21, 2015 by vimaldas2005
0 votes
  • You should use only one adapter binded with the list of data you need to list
  • When you need to remove and replace all items, you have to clear all items from data-list using "list.clear()" and then add new data using "list.addAll(List)"

here an example:

List myList = new ArrayList();
ArrayAdapter adapter = new ArrayAdapter(this,       android.R.layout.simple_list_item_1, myList);
listview.setAdapter(adapter);
listview.setOnItemClickListener(this);

populateList(){
   List result = getDataMethods();

   myList.addAll(result);
   adapter.notifyDataSetChanged();
}

repopulateList(){
   List result = getDataMethods();

   myList.clear();
   myList.addAll(result);
   adapter.notifyDataSetChanged();
}
answered Sep 21, 2015 by ankitarajoria4
0 votes
            names = db.getSites();
            la = new ArrayAdapter(EditSiteList.this,
                    android.R.layout.simple_list_item_1, names);
            EditSiteList.this.setListAdapter(la);
            listview.invalidateViews();

this code works fine for me.

answered Sep 21, 2015 by sachin wagh
0 votes

At first you should remove the item from your list. Later you may empty your adapter and refill it with new list.

private void add(final List trackList) {
    MyAdapter bindingData = new MyAdapter(MyActivity.this, trackList);

    list = (ListView) findViewById(R.id.my_list); // TODO

    list.setAdapter(bindingData);


    // Click event for single list row
    list.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView parent, View view,
                final int position, long id) {
            // ShowPlacePref(places, position);
            AlertDialog.Builder showPlace = new AlertDialog.Builder(
                    Favoriler.this);
            showPlace.setMessage("Remove from list?");
            showPlace.setPositiveButton("DELETE", new OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {    

                    trackList.remove(position); //FIRST OF ALL REMOVE ITEM FROM LIST
                    list.setAdapter(null); // THEN EMPTY YOUR ADAPTER

                    add(trackList); // AT LAST REFILL YOUR LISTVIEW (Recursively)

                }

            });
            showPlace.setNegativeButton("CANCEL", new OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {

                }
            });
            showPlace.show();
        }

    });

}
answered Sep 21, 2015 by deepak07.s
0 votes

Try this code, it works for me.

public class Third extends ListActivity {
private ArrayAdapter adapter;
private List 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();
     Collections.addAll(liste, values);
     adapter = new ArrayAdapter(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();
  }
}
answered Sep 21, 2015 by gauravg.gwl

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