Dynamically Delete an element from listview - Android

Question

I want to delete an element from the list when a button x is clicked on the layout of a list element. Here is my java code, onNext() is working for adding an element to the list . but the onDelete isnt working.The textView4 element has numbers starting from 1 to n when new elements are added

 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list2);
        arrayList = new ArrayList<String>();
        arrayList.add("1");
        adapter2 = new ArrayAdapter<String>(this, R.layout.list2_layout, R.id.textView4, arrayList);

        ListView myList2 = (ListView)
                findViewById(R.id.listView2);
        myList2.setAdapter(adapter2);


    }

    public void onNextItem(View v)
    {

            counter++;
            String str=Integer.toString(counter);
            arrayList.add(str);
        adapter2.notifyDataSetChanged();

    }
    public void onDeleteItem(View v2)
    {

        arrayList.remove(R.id.textView4);
        adapter2.notifyDataSetChanged();

    }

possible duplicate of [Remove ListView items in Android](http://stackoverflow.com/questions/2558591/remove-listview-items-in-android) — 2Dee, Jun 10 '15 at 09:19
if you just want to delete the last added item use: `arrayList.remove(arrayList.size()-1);` — Strider, Jun 10 '15 at 09:21

score 1 · Answer 1 · answered Jun 10 '15 at 08:53

1

you should not be passing the R.id.textView4 to remove the 4th textView

 arrayList.remove(R.id.textView4);

You will need to do something like arrayList.remove(4); to delete the forth element from the list

answered Jun 10 '15 at 08:53

Dominic D'Souza

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Ok, I tried that but the app closes down on doing that – Asif Muhammad Jun 10 '15 at 09:03

score 1 · Answer 2 · answered Jun 10 '15 at 08:54

1

on onNextItem(View v):

you are adding an integer(counter) converted to string to the list(arrayList.add(str);)

but on onDeleteItem(View v2):

you are trying to remove a view from the list (arrayList.remove(R.id.textView4);)

answered Jun 10 '15 at 08:54

hrskrs

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Ok, how do I delete an element then? Thanks – Asif Muhammad Jun 10 '15 at 08:56
you can do remove item from `ArrayList` and `notifyDataSetChanged` as said by @Dominic D'Souza – N J Jun 10 '15 at 09:00
@AsifMuhammad instead of `arrayList.remove(R.id.textView4);` write `arrayList.remove(StringYouWantToRemove);` – hrskrs Jun 10 '15 at 09:02

score 0 · Answer 3 · answered Jun 10 '15 at 09:16

0

Your trying to remove Textview

arrayList.remove(R.id.textView4);

do it like this

arrayList.remove(clickeditempostion);
adapter2.notifyDataSetChanged();

answered Jun 10 '15 at 09:16

Anil Meenugu

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score 0 · Answer 4 · answered Jun 10 '15 at 09:27

0

You can do something like this.

arrayList.remove(CURRENT_INDEX_OF_ARRAYLIST);
        adapter2.notifyDataSetChanged();

answered Jun 10 '15 at 09:27

Shoeb Siddique

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Dynamically Delete an element from listview - Android

4 Answers4