Remove items from listview on its ItemClickListener

Question

I am using a collection of ArrayList to fill my Listview. My ListView contains two separate rows types.

Header and Footer.

I am trying to achieve the ExpandableListView Functionality on my Listview from which I am trying to remove some items on click of header till next header. I am using this function to loop through items and removing items

private void removeItems(int value)
{   Log.e(Constant.LOG, items.size()+"");
    for (int i = value;i < items.size(); i++) {
        if(!items.get(i).isSection())
            items.remove(i);
    }
    Log.e(Constant.LOG, items.size()+"");
    adapter = new EntryAdapter(this, items, this);
    mListView.setAdapter(adapter);
}

QUESTION IS : I am not able to remove all items from the list in one shot, some stays there !

I have tried looping through adapter.count(); but no luck

My List : SECTION 1 ITEM 1 ITEM 2 Item N Section 2 But when I click on Section 1 not all ITEMS get deleted in one shot WHY! I am not able to use Expandable Listview at this stage because activity contains many more complex functionality on List. Please help me where I am going wrong!

Answer 1

Create a new ArrayList<Collection> , Then add your item in it and then use removeAll(collection) .

TRY THIS:

  private void removeItems(int value)
  {   Log.e(Constant.LOG, items.size()+"");
   ArrayList<Collection> deleteItems= new ArrayList<Collection>();

  for (int i = value;i < items.size(); i++) {
    if(!items.get(i).isSection())
       deleteItems.add(items.get(i));
}
 items.removeAll(deleteItems);
 Log.e(Constant.LOG, items.size()+"");
 adapter = new EntryAdapter(this, items, this);
 mListView.setAdapter(adapter);
 }

EDIT

Every time you are deleting an item, you are changing the index of the elements inside .

eg : let suppose you are deleting list 1 , then list[2] becomes list 1 and hence your code will skip list 1 next time because now your counter would be moved to 2.

Here are other ways by which you can achieve this also, Removing item while iterating it

Answer 2

So what exactly I did now. Instead of looping through items again I did like this :

I created another list and parallely populate it with the main array.

items.add(user);
// after populating items did this
newItems.addAll(items);  // same collection ArrayList

and finally I can play with the main array by using removeAll and addAll methods.

items.removeAll(newItems);  // remove items
items.addAll(afterPosition,newItems); // add items after position