android 長按 ListView 無法彈出 ContextMeun

標籤：

可能的原因：onItemLongClick 消費了長按事件

 

  
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;
  
 }
  
});
 

關鍵在 onItemLongClick 函數的傳回值，看文檔注釋：

 

  
/**
  
 * 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，系統認為使用者實現的回呼函數已經處理完了長按事件。而彈出 ContextMenu 也是長按事件的響應，且在 onItemLongClick 響應之後，所以返回 true 導致 ContextMenu 無法彈出。

來自為知筆記(Wiz)

android 長按 ListView 無法彈出 ContextMeun