Symbian下遍历所有接入点，并动态显示在PopupSettingItem中(转)

在做网络连接选择中，我们往往是首先遍历用户手机内已存接入点，而后又用户选择适当接入点连接网络。由于每部手机内部每个已存接入点个数是不同的，那么就要求动态读取和现实已有接入点。所以可以通过继承 CAknEnumeratedTextPopupSettingItem，重载 CompleteConstructionL()方法，并在CAknSettingItemList中实现，

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中构建资源
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中调用
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);