2012-07-19 61 views
0

这是我的代码: 这里_alProduct是一个在主类中定义的静态的ArrayList。 我正在从_alProduct上长按一下listview就删除一个项目。 现在我想显示删除删除项目的列表视图。我如何刷新android中的listview?

公共类MCRActivity2您ArrayAdapter延伸,而不是在ArrayList调用remove()活动{

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()。这将从ArrayList中删除该项目,并通知AdapterView刷新其内容。

+0

可以请你写一些代码先生,怎么做,因为它显示的功能像removeAllViews()等 – 2012-07-19 17:20:24

+0

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

+0

@ user1507602:这是'ArrayAdapter'的链接' remove()':http://goo.gl/C5qMg – CommonsWare 2012-07-19 17:34:39