android 长按 ListView 无法弹出 ContextMeun

可能的原因：

onItemLongClick 消费了长按事件

   
     

    
      
mListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
    
      
 @Override
    
      
 public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
    
      
 mApSelect = position;
    
      
 Log.d(TAG, "onItemLongClick:" + mApSelect);
    
      
 return false;
    
      
 }
    
      
});
   
     

关键在  onItemLongClick 函数的返回值，看文档注释：

   
     

    
      
/**
    
      
 * Callback method to be invoked when an item in this view has been
    
      
 * clicked and held.
    
      
 *
    
      
 * Implementers can call getItemAtPosition(position) if they need to access
    
      
 * the data associated with the selected item.
    
      
 *
    
      
 * @param parent The AbsListView where the click happened
    
      
 * @param view The view within the AbsListView that was clicked
    
      
 * @param position The position of the view in the list
    
      
 * @param id The row id of the item that was clicked
    
      
 *
    
      
 * @return true if the callback consumed the long click, false otherwise
    
      
 */
   
     

如果返回 ture，系统认为用户实现的回调函数已经处理完了长按事件。而弹出 ContextMenu 也是长按事件的响应，且在  onItemLongClick 响应之后，所以返回 true 导致 ContextMenu 无法弹出。

来自为知笔记(Wiz)