我將如何從listview中刪除listitem？

Question

Listitem不會從數據庫中檢索。它從另一個班級轉移過來。

Answer 1

您不「從列表視圖中刪除listitem」。您修改支持ListView的ListAdapter所擁有的數據。如果適配器是ArrayAdapter，請致電remove()ArrayAdapter。如果適配器是CursorAdapter，請從數據庫中刪除該項並requery()Cursor。等等。

Answer 2

更好，如果你使用），一個SimpleAdapter它可以通過消除要刪除&只是調用adapter.notifyDataSetChanged（什麼需要一個ArrayList.Then您更新列表一樣：

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(); 

    }