從列表視圖中刪除元素（刷卡或點擊）

Question

我正在嘗試創建一個動態列表視圖。我可以添加一個項目，但我現在無法刪除它。代碼實際上非常簡單，我看到的每一個指南都對我和我的代碼來說太複雜了。我想在我的MainActivity中添加一些簡單的東西來刪除選中的項目。我不在乎在哪種方式，像gmail刷卡或通過點擊或任何其他方式..我只是想我簡單的方式來刪除列表中的元素。這是活動

public class MainActivity extends Activity { 
    private EditText etInput; 
    private Button btnAdd; 
    private ListView lvItem; 
    private ArrayList<String> itemArrey; 
    private ArrayAdapter<String> itemAdapter; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     setUpView(); 

    } 

    private void setUpView() { 
     // TODO Auto-generated method stub 
     etInput = (EditText)this.findViewById(R.id.editText_input); 
     btnAdd = (Button)this.findViewById(R.id.addbtn); 
     lvItem = (ListView)this.findViewById(R.id.listView_items); 


     itemArrey = new ArrayList<String>(); 
     itemArrey.clear(); 

     itemAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,itemArrey); 
     lvItem.setAdapter(itemAdapter); 


     btnAdd.setOnClickListener(new View.OnClickListener() { 

      public void onClick(View v) { 

       addItemList(); 
      } 
     }); 

     etInput.setOnKeyListener(new View.OnKeyListener() { 

      public boolean onKey(View v, int keyCode, KeyEvent event) { 
       // TODO Auto-generated method stub 

       if (keyCode == KeyEvent.KEYCODE_ENTER) { 
        addItemList(); 
       } 
       return true; 
      } 
     }); 


    } 

    protected void addItemList() { 

    if (isInputValid(etInput)) { 
     itemArrey.add(0,etInput.getText().toString()); 
     etInput.setText(""); 

     itemAdapter.notifyDataSetChanged(); 

    } 

    } 

    protected boolean isInputValid(EditText etInput2) { 
     // TODO Auto-generatd method stub 
     if (etInput2.getText().toString().trim().length()<1) { 
      etInput2.setError("Insert a value"); 
      return false; 
     } else { 
      return true; 
     } 

    } 
} 

是否可以插入部分代碼來刪除我的活動代碼中的項目？由於

Answer 1

試試這個，雖然ListView項長ClickListener你可以做到這一點

lvItem.setOnItemLongClickListener(new OnItemLongClickListener() { 

     @Override 
     public boolean onItemLongClick(AdapterView<?> parent, View v, 
       int position, long id) { 
      // TODO Auto-generated method stub 
           AlertDialog.Builder adb = new AlertDialog.Builder(
        YourActivity.this); 
      adb.setTitle("Are you sure want to delete this item"); 
      adb.setPositiveButton("Yes", 
        new DialogInterface.OnClickListener() { 

         @Override 
         public void onClick(DialogInterface dialog, 
           int which) { 
          // TODO Auto-generated method stub 
          itemArrey.remove(position); 
          itemAdapter.notifyDataSetChanged(); 


         } 
        }); 
      adb.setNegativeButton("NO", 
        new DialogInterface.OnClickListener() { 

         @Override 
         public void onClick(DialogInterface dialog, 
           int which) { 
          // TODO Auto-generated method stub 
          dialog.dismiss(); 

         } 
        }); 
      adb.show(); 

      return false; 
     } 
    }); 

Answer 2

將這個方法在你的onCreate：

lvItem .setOnItemClickListener(new OnItemClickListener() { 
    public void onItemClick(AdapterView<?> parent, View v,int position, long id) { 
     itemArrey.remove(position); 
     itemAdapter.notifyDataSetChanged(); 
    }); 
} 

Answer 3

這會幫助你。

 lv.setOnItemLongClickListener(new OnItemLongClickListener() { 

      @Override 
      public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
        int position, long id) { 

       itemArrey.remove(position); 

       itemAdapter.notifyDataSetChanged(); 

       return true; 
      } 
     }); 

Answer 4

當然是可能的。 ArrayList.html#remove

或者如果您不知道索引只是遍歷列表。 Calling remove in foreach loop in Java

Answer 5

做到這一點的方式..

lvItem.setOnItemLongClickListener(new OnItemLongClickListener() { 
      @Override 
      public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
        int position, long id) { 

       itemArrey.remove(position); 
       itemAdapter.notifyDataSetChanged(); 
       return true; 

      } 
     }); 

Answer 6

要刪除列表項只做一件事情，得到的ListView onLongClickListener。 然後打開它有兩個選項

1. 上下文菜單中刪除

2. 取消

當用戶拿起第一個項目從列表中刪除。然後調用listadapter notify datasetChanged方法。

Answer 7

試試下面的代碼：

單一的點擊：

listview .setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView<?> parent, View v,int position, long id) { 

      showDialog(int position); 

     }); 
    } 

public void showDialog(int position){ 
    AlertDialog alertDialog; 
AlertDialog.Builder builder = new AlertDialog.Builder(BaseActivity.this); 
    alertDialog = builder.create(); 
    alertDialog.setOnDismissListener(new myOnDismissListener()); 

    alertDialog.setTitle(TITLE OF DIALOG); 
    alertDialog.setMessage(MESSAGE YOU WANT TO SHOW IN DIALOG); 
    alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK", new DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog, int whichButton) { 

        YOUR ARRAY.remove(position); 
        YOUR ADAPTER.notifyDataSetChanged(); 

     } 
    }); 
    alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "CANCEL", new DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog, int whichButton) { 
     } 

    }); 
    alertDialog.show(); 
} 

Answer 8

使用這個庫，我用這個和它工作得很好，如果你喜歡刷卡試試這個：

https://github.com/47deg/android-swipelistview