爲什麼在listview中總是顯示arraylist的最後一個值？

-1

我已經啓動了一個定時器，它調用了getMessage webservice，它返回該用戶的通訊消息arraylist的大小總是顯示正確的消息數量，但是當在該消息的列表視圖中顯示時只顯示最後一個消息發送給web服務我已經使用此代碼。爲什麼在listview中總是顯示arraylist的最後一個值？

public void handleMessage(Message msg) 
    { 
     super.handleMessage(msg); 

     if(msg.arg1!=RECIEVEFAILURE) 
      { 
      objrReceiveMessageSiteList =(ArrayList<ReceiveMessageSiteList>)msg.obj; 
      System.out.println("objrReceiveMessageSiteList.get(0)"+objrReceiveMessageSiteList.get(0).getMessageStatus()); 
      System.out.println("objrReceiveMessageSiteList.get(0)"+objrReceiveMessageSiteList.size()); 
      if(objrReceiveMessageSiteList.size()!=0 && !objrReceiveMessageSiteList.get(0).getMessageStatus().equalsIgnoreCase("No New Message")) 
      { 
       for(int i=0;i<objrReceiveMessageSiteList.size();i++) 
       { 
        objkeyvaluepair.setMessage(objrReceiveMessageSiteList.get(i).getMessage()); 
        objkeyvaluepair.setMessageType(objrReceiveMessageSiteList.get(i).getMessageType()); 
        objkeyvaluepair.setTimeStamp(objrReceiveMessageSiteList.get(i).getTimeStamp()); 
        objkeyvaluepair.setSenderFirstName(objrReceiveMessageSiteList.get(i).getSenderFirstName()); 
        objkeyvaluepair.setSenderId(objrReceiveMessageSiteList.get(i).getSenderId()); 
        objkeyvaluepair.setRecieverFirstName(objrReceiveMessageSiteList.get(i).getReceiverFirstName()); 
        messagerecord.add(objkeyvaluepair); 
        System.out.println("MESSAGE SIZE"+messagerecord.size()); 
        System.out.println("MESSAGE---------- findeee"+messagerecord.get(i).getMessage()); 

       } 
       System.out.println("objrReceiveMessageSiteList.get(0)--------------"+objrReceiveMessageSiteList.get(0).getMessageStatus()); 
       message.setText(""+messagerecord.size()); 
      } 
    } 

    } 
};

這裏面for循環的ArrayList適配器設置適配器發送時是表示syste.out.println.but正確的信息採取合適的尺寸，但所有的列表只顯示最後的消息view.please幫我

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2012-05-21 sandee

改變這種方法爲以下：

public void handleMessage(Message msg) 
    { 
     super.handleMessage(msg); 

     if(msg.arg1!=RECIEVEFAILURE) 
      { 
      objrReceiveMessageSiteList =(ArrayList<ReceiveMessageSiteList>)msg.obj; 
      System.out.println("objrReceiveMessageSiteList.get(0)"+objrReceiveMessageSiteList.get(0).getMessageStatus()); 
      System.out.println("objrReceiveMessageSiteList.get(0)"+objrReceiveMessageSiteList.size()); 
      if(objrReceiveMessageSiteList.size()!=0 && !objrReceiveMessageSiteList.get(0).getMessageStatus().equalsIgnoreCase("No New Message")) 
      { 
       for(int i=0;i<objrReceiveMessageSiteList.size();i++) 
       { 
        //Create Local object of the Objkeyvaluepair here, for example 
        //ObjectKeyValuePair objkeyvaluePair=new OjectKeyvaluePair(); 
        objkeyvaluepair.setMessage(objrReceiveMessageSiteList.get(i).getMessage()); 
        objkeyvaluepair.setMessageType(objrReceiveMessageSiteList.get(i).getMessageType()); 
        objkeyvaluepair.setTimeStamp(objrReceiveMessageSiteList.get(i).getTimeStamp()); 
        objkeyvaluepair.setSenderFirstName(objrReceiveMessageSiteList.get(i).getSenderFirstName()); 
        objkeyvaluepair.setSenderId(objrReceiveMessageSiteList.get(i).getSenderId()); 
        objkeyvaluepair.setRecieverFirstName(objrReceiveMessageSiteList.get(i).getReceiverFirstName()); 
        messagerecord.add(objkeyvaluepair); 
        System.out.println("MESSAGE SIZE"+messagerecord.size()); 
        System.out.println("MESSAGE---------- findeee"+messagerecord.get(i).getMessage()); 

       } 
       System.out.println("objrReceiveMessageSiteList.get(0)--------------"+objrReceiveMessageSiteList.get(0).getMessageStatus()); 
       message.setText(""+messagerecord.size()); 
      } 
    } 

    } 
};

來源

2012-05-21 04:24:53 jeet

您正在通過嵌套for循環添加相同的對象（objkeyvaluepair）到ArrayList每次迭代。

在最內部的for循環中，您應該創建一個新的對象，然後將此新對象添加到ArrayList。

來源

2012-05-21 04:37:30

爲什麼在listview中總是顯示arraylist的最後一個值？

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