ListView setOnItemClickListener和setOnItemSelectedListener存儲選定的項目索引

Question

我已經在這個網站上看到，如果我們想知道SelectedItem（.getSelectedItemPosition（））的索引，就必須定製一個ListView的setOnItemSelectedListener和setOnItemClickListener。所以這就是我所做的，但它沒有存儲SekectedItem的位置，而是我總是-1 ...

我想要做的只是讓用戶從列表中刪除項目選中項目並單擊一個按鈕。

請參見下面的代碼：

listViewPeople.setOnItemClickListener(new ListView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> a, View v, int i, long l) { 
      try { 
       // Remembers the selected Index 
       listViewPeopleId = listViewPeople.getSelectedItemPosition(); 
      } 
      catch(Exception e) { 
       System.out.println("Nay, cannot get the selected index"); 
      } 
     } 
    }); 

    listViewPeople.setOnItemSelectedListener(new ListView.OnItemSelectedListener() { 
     @Override 
     public void onItemSelected(AdapterView<?> a, View v, int i, long l) { 
      try { 
       // Remembers the selected Index 
       listViewPeopleId = listViewPeople.getSelectedItemPosition(); 
       System.out.println("Yay, set the selected index " + listViewPeopleId); 
      } 
      catch(Exception e) { 
       System.out.println("Nay, cannot get the selected index " + listViewPeopleId); 
      } 
     } 

     @Override 
     public void onNothingSelected(AdapterView<?> arg0) { 
      try { 
       // Remembers nothing selected 
       listViewPeopleId = -1; 
       System.out.println("Yay, set that nothing is selected " + listViewPeopleId); 
      } 
      catch(Exception e) { 
       System.out.println("Nay, cannot set that nothing is selected " + listViewPeopleId); 
      } 
     } 
    }); 

有什麼不對？

謝謝你的幫助！

克里斯托夫

Answer 1

而不是做listViewPeople.getSelectedItemPosition();嘗試使用INT I參數來獲取索引。