How would i delete a listitem from a listview?
The Listitem would not be retrieved from the开发者_StackOverflow db. It is passed over from another class.
You don't "delete a listitem from a listview". You modify the data held by the ListAdapter
that is supporting the ListView
. If the adapter is an ArrayAdapter
, call remove()
on the ArrayAdapter
. If the adapter is a CursorAdapter
, remove the item from the database and requery()
the Cursor
. And so on.
Better if you use a SimpleAdapter which takes an ArrayList.Then you update your list by removing what you want to remove & just call adapter.notifyDataSetChanged().Like:
static final ArrayList<HashMap<String,String>> list =new ArrayList<HashMap<String,String>>();
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.newentrypagelayout);
//create base adapter for listview
adapter= new SimpleAdapter(
this,
list,
R.layout.custom_list_row,
new String[] {"pen","price","color"},
new int[] {R.id.text1,R.id.text2, R.id.text3}
);
populateList();
setListAdapter(adapter);
}
public void populateList()
{
sHashMap<String,String> temp = new HashMap<String,String>();
temp.put("pen","MONT Blanc");
temp.put("price", "200.00$");
temp.put("color", "Silver, Grey, Black");
list.add(temp);
HashMap<String,String> temp1 = new HashMap<String,String>();
temp1.put("pen","Gucci");
temp1.put("price", "300.00$");
temp1.put("color", "Gold, Red");
list.add(temp1);
HashMap<String,String> temp2 = new HashMap<String,String>();
temp2.put("pen","Parker");
temp2.put("price", "400.00$");
temp2.put("color", "Gold, Blue");
list.add(temp2);
HashMap<String,String> temp3 = new HashMap<String,String>();
temp3.put("pen","Sailor");
temp3.put("price", "500.00$");
temp3.put("color", "Silver");
list.add(temp3);
HashMap<String,String> temp4 = new HashMap<String,String>();
temp4.put("pen","Porsche Design");
temp4.put("price", "600.00$");
temp4.put("color", "Silver, Grey, Red");
list.add(temp4);
}
now if you need to delete an item.Get the selected index(the item that has been selected) remove it from the array list & call the method I told before.Like:
public void itemDeleteButtonClicked(View v)
{
int index=itemsListView.getSelectedItemPosition();
list.remove(index);
adapter.notifyDataSetChanged();
}
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