Symbian下遍歷所有接入點，並動態顯示在PopupSettingItem中

在做網絡連接選擇中，我們往往是首先遍歷用戶手機內已存接入點，而後又用戶選擇適當接入點連接網絡。由於每部手機內部每個已存接入點個數是不同的，那麼就要求動態讀取和現實已有接入點。所以可以通過繼承 CAknEnumeratedTextPopupSettingItem，重載 CompleteConstructionL()方法，並在CAknSettingItemList中實現，

lib  commdb.lib

AccessPointSettingItem.h

#include <aknsettingitemlist.h>

class CAccessPointSettingItem : public CAknEnumeratedTextPopupSettingItem
    {
public:
 CAccessPointSettingItem(TInt aIdentifier, TInt& aValue);
 //load the Iap data
 TInt LoadIapListL();

 void LoadL();

private:
 void CreateAndExecuteSettingPageL();
 void CompleteConstructionL();
 
private:
 TInt& iValue;
    };

CAccessPointSettingItem.cpp

#include <commdb.h>
#include "Aaccesspointsettingitem.h"

CAccessPointSettingItem::CMobblerAccessPointSettingItem(TInt aIdentifier, TInt& aValue)
  :CAknEnumeratedTextPopupSettingItem(aIdentifier, aValue), iValue(aValue)
 {
 }

 //We must check whether the target value, iValue, is in the loaded array or not.
 //If not, it definitely causes a panic -- "Setting Item Lis 6".
 //In that case, we will choose the first item as the default one.
void CAccessPointSettingItem::LoadL()
 {
 CArrayPtr<CAknEnumeratedText>* texts(EnumeratedTextArray());
 TInt selectedIndex(IndexFromValue(iValue));

 if (selectedIndex < 0)  // no match found.
  {
  if (texts->Count() > 0) 
   {
   // choose the first item as default one.
   CAknEnumeratedText* item(texts->At(0));
   // reset external value to the default one.
   SetExternalValue(item->EnumerationValue());
   }
  }

 CAknEnumeratedTextPopupSettingItem::LoadL();
 }

TInt CAccessPointSettingItem::LoadIapListL()
 {
 TInt firstIapId(KErrNotFound);
 CArrayPtr<CAknEnumeratedText>* texts = this->EnumeratedTextArray();
  // The destinations API does not exist
  // so list all the connection points
 
  // Add all the access points to the list
 CCommsDatabase* commDb(CCommsDatabase::NewL(EDatabaseTypeIAP));
 CleanupStack::PushL(commDb);

 // Open IAP table
 CCommsDbTableView* commView(commDb->OpenIAPTableViewMatchingBearerSetLC(
   ECommDbBearerGPRS | ECommDbBearerWLAN,
   ECommDbConnectionDirectionOutgoing));

 // Search all IAPs
 for (TInt error(commView->GotoFirstRecord()); error == KErrNone; error
   = commView->GotoNextRecord())
  {
  TBuf<KCommsDbSvrMaxColumnNameLength> iapName;
  TUint32 iapId;

  commView->ReadTextL(TPtrC(COMMDB_NAME), iapName);
  commView->ReadUintL(TPtrC(COMMDB_ID), iapId);

  HBufC* text(iapName.AllocLC());
  CAknEnumeratedText* enumText(new (ELeave) CAknEnumeratedText(iapId,
    text));
  CleanupStack::Pop(text);
  CleanupStack::PushL(enumText);
  EnumeratedTextArray()->AppendL(enumText);
  CleanupStack::Pop(enumText);

  if (firstIapId == KErrNotFound)
   {
   firstIapId = iapId;
   }

  }

 CleanupStack::PopAndDestroy(commView);
 CleanupStack::PopAndDestroy(commDb);

 return firstIapId;
 }

void CAccessPointSettingItem::CreateAndExecuteSettingPageL()
 {
 CAknSettingPage* dlg(CreateSettingPageL());

 SetSettingPage(dlg);
 SettingPage()->SetSettingPageObserver(this);

 SettingPage()->SetSettingTextL(SettingName());

 SettingPage()->ExecuteLD(CAknSettingPage::EUpdateWhenChanged);
 SetSettingPage(0);
 }

void CAccessPointSettingItem::CompleteConstructionL()
 {
 CAknEnumeratedTextPopupSettingItem::CompleteConstructionL();
 }

rss中構建資源
RESOURCE AVKON_POPUP_SETTING_TEXTS r_popup_setting_texts_enum
 {
 setting_texts_resource = r_texts_enum;
 }

RESOURCE ARRAY r_texts_enum
 {
 items =
  {
  AVKON_ENUMERATED_TEXT
   {
   value = 0;
   text = "";
   }
  };
 }

RESOURCE AVKON_SETTING_PAGE r_setting_page_enum
 {
 type = EAknCtPopupSettingList;
 editor_resource_id = r_popup_setting_list_enum;
 }

RESOURCE POPUP_SETTING_LIST r_popup_setting_list_enum
 {
 flags = 0;
 }

在CCoeControl中調用
CAknSettingItemList*        iItemList;

TInt tempIapId(0);
const TDesC& text(_L("AccessPoint"));
CAccessPointSettingItem* item(new (ELeave) CAccessPointSettingItem(0, tempIapId));
CleanupStack::PushL(item);
item->ConstructL(isNumberedStyle, iCount, text, icons, R_SETTING_PAGE_ENUM, -1, 0, R_POPUP_SETTING_TEXTS_ENUM);
 
CArrayPtr<CAknEnumeratedText>* textss(item->EnumeratedTextArray());
textss->ResetAndDestroy();
TInt firstIapId(item->LoadIapListL());
// Load list of IAPs
item->Load();
//>Append list
iItemList->SettingItemArray()->AppendL(item);
CleanupStack::Pop(item);