2012-07-19 60 views
0

這是我的代碼: 這裏_alProduct是一個在主類中定義的靜態的ArrayList。 我正在從_alProduct上長按一下listview就刪除一個項目。 現在我想顯示刪除刪除項目的列表視圖。我如何刷新android中的listview?

公共類MCRActivity2您ArrayAdapter延伸,而不是在ArrayList調用remove()活動{

TextView tvShoppingCart; 
ListView lvSelectedItems; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.mcractivity2); 

    lvSelectedItems = (ListView) findViewById(R.id.lvSelectedItems); 

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, MobileCashRegisterActivity._alProduct); 

    lvSelectedItems.setAdapter(adapter); 

    lvSelectedItems.setOnItemLongClickListener(new OnItemLongClickListener() { 

     public boolean onItemLongClick(AdapterView<?> adapter, View view, 
       int position, long arg3) { 
      // TODO Auto-generated method stub 
      String text = "Clicked item is " + adapter.getItemAtPosition(position); 

      Toast.makeText(getApplicationContext(),text,Toast.LENGTH_LONG).show();// ""+ lvSelectedItems.getSelectedItem().toString(),Toast.LENGTH_LONG).show(); 

      MobileCashRegisterActivity._alProduct.remove(position); 
      MobileCashRegisterActivity._alPrice.remove(position); 
      MobileCashRegisterActivity._alQuantity.remove(position); 

      return false; 
     } 
    }); 
    } 
} 

回答

3

呼叫remove()。這將從ArrayList中刪除該項目,並通知AdapterView刷新其內容。

+0

可以請你寫一些代碼先生,怎麼做,因爲它顯示的功能像removeAllViews()等 – 2012-07-19 17:20:24

+0

我找不到apapter.remove()函數 – 2012-07-19 17:29:32

+0

@ user1507602:這是'ArrayAdapter'的鏈接' remove()':http://goo.gl/C5qMg – CommonsWare 2012-07-19 17:34:39