Question

我目前有一项扩展ListActivity

的主要活动

我使用ListAdapter对数据库中的条目进行活动。我将膨胀的条目作为上下文菜单操作，但是我希望能够在单击时从所选ListView中的TextViews之一获取值，这是我用{{获得的} 1}}。

问题是，当长时间按下激活上下文菜单时，OnListItemClick listener没有注册，我无法从常规短片中获取OnItemClickListener的值单击。 ListView点击后onListItemClick可见，但View没有，onContextItemSelected只能看到MenuItem。

public class EntryActivity extends ListActivity
{ 
   String currentItemName;

   @Override
   protected void onListItemClick(ListView l, View v, int position, long id) 
   {
       //The Value i need is this: currentItemName, 
       //and i need it to register when a list item is clicked
       TextView curName =(TextView)v.findViewById(R.id.txtName) ;
       currentItemName = curName.getText().toString(); 
   }

   //I need to use the String obtained from the click in the context menu
   //to call a method, but a long click makes the onContextItemSelected 
   //be called, so onItemClickListener is never called, and i cant get the string
   @Override
   public boolean onContextItemSelected(MenuItem item ) 
   {
      switch(item.getItemId())
      {
         case ADD_ONE: 
            methodCalled(currentItemName);
            break;
      }
   }

   //I am inflating the list with a DataAdapter and a ListAdapter
   private void refresh()
   {
      //create an array the size of the cursor(one item per row)
      InventoryItem[] items = new InventoryItem[c.getCount()];

      //create and set the DataAdaptor with the array of inventory items, to the 
      //inventoryList layout
      da = new DataAdapter(this,  R.layout.inventorylist, items);
      setListAdapter(da);      
   }
}

有没有办法让我点击的视图可用于contextMenu监听器？或者我是以错误的方式来做这件事的？

Answer 1

您可以在用户长按listview项目后调用ListView.setOnItemLongClickListener(...)和AlertDialog.Builder.setItems(CharSequence[] items, DialogInterface.OnClickListener listener)来显示上下文菜单。

Answer 2

好的，事实证明这真的很容易实现。在我的listItemClicklistener中，我只需要为contextMenu注册ListItem，然后打开上下文菜单：

    protected void onListItemClick(ListView l, View v, int position, long id) 
{

    Cursor c = db.getAllItems(); 
    c.moveToFirst(); 

    //get and store the row that was clicked
    currentRow = position;    

    //register this item for a context menu 
    registerForContextMenu(l);
    //open the context menu
    openContextMenu(l);


}

并且必须将此行添加到我的OnCreate方法中：

registerForContextMenu(getListView());

方式好，效果很好！

尝试从onContextItemSelected获取选定的视图

2 个答案: