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  lt   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

User · Answer

private List lt DataValue gt  datavalue new ArrayList lt Datavalue gt          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

User · Answer

This worked for me  Hope it helps someone      SimpleAdapter adapter    SimpleAdapter  getListAdapter    this resultsList remove  int  info id   adapter notifyDataSetChanged

User · Answer

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

User · Answer

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

User · Answer

lt 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   gt    And create Event item delete handler

User · Answer

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 lt String gt  adapter  private List lt String gt  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 lt String gt          Collections addAll liste  values        adapter   new ArrayAdapter lt String gt  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

User · Answer

adapter remove arraylist get position    adapter notifyDataSetChanged      or you can call again  setListAdapter adapter

User · Answer

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    gt  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 lt GenrricStoring gt  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

User · Answer

List lt String gt  entries   private ArrayAdapter lt String gt  categoryAdapter     Your list of entries  Example   lt  category1   category2   category3  gt    entries    new ArrayList lt String gt      categoryAdapter   new ArrayAdapter lt String gt  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

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

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