Required header file:
# include & ltetel3rdparty.h & gt
Required link library:
Etel3rdparty.lib
Required capacity:
Ability to read device data
Network information. h
#ifndef __NETWORKINFO_H__
#define __NETWORKINFO_H__
# include & ltetel3rdparty.h & gt// CTelephony
//Observer interface
MNetworkInfoObserver class
{
Public:
Virtual void NetworkInfoRetrievedL (
tnetworkinfov 1 & amp； aNetworkInfo)= 0；
Virtual VoidHandleNetworkInfoError (tinta error) = 0;
};
//Active object for obtaining network information
Network-like information: public activities
{
Public:
Static CNetworkinfo * newl ();
~ CNetworkInfo()；
void GetNetworkInfoL(MNetworkInfoObserver * aObserver)；
Protected:
//from CActive
void RunL()；
TInt run error(TInt a error)；
void DoCancel()；
Private:
CNetworkInfo()；
void construct 1()；
Private:
CTelephony * iTelephony
CTelephony::tnetworkinfov 1 in info；
CTelephony::tnetworkinfov 1 pckg in infopckg；
MNetworkInfoObserver * io bserver；
};
#endif // __NETWORKINFO_H__
netinfo
# contains "NetworkInfo.h"
CNetworkInfo::CNetworkInfo()
:CActive(EPriorityStandard)，
iNwInfoPckg(iNwInfo)
{
cactive scheduler::Add(this)；
}
CNetworkInfo * CNetworkInfo::NewL()
{
CNetworkInfo * self = new(e leave)CNetworkInfo；
CleanupStack::PushL(self)；
self->； construct l()；
clean upstack::Pop()；
Return to self;
}
void CNetworkInfo::ConstructL()
{
itele phony = CTelephony::NewL()；
}
CNetworkInfo::~CNetworkInfo()
{
cancel()；
Delete iTelephony
}
//This function is used by users of our class to start obtaining network information.
void CNetworkInfo::GetNetworkInfoL(MNetworkInfoObserver * AOB server)
{
__ASSERT_ALWAYS(！ IsActive()，User::Leave(KErrInUse))；
iObserver = aObserver
//Start asynchronous call to receive current network information.
iTelephony-& gt； GetCurrentNetworkInfo(iStatus，iNwInfoPckg)；
set active()；
}
void CNetworkInfo::DoCancel()
{
iTelephony-& gt； cancel async(CTelephony::EGetCurrentNetworkInfoCancel)；
}
void CNetworkInfo::RunL()
{
User::LeaveIfError(iStatus。 int())；
//The request completed successfully.
//Now we can inform our observers.
if(iObserver)
{
iob server-& gt； NetworkInfoRetrievedL(iNwInfoPckg())；
}
}
TInt CNetworkInfo::run error(TInt aError)
{
//An error occurred while retrieving the current network information.
//Let's inform our observer of this error so that it can analyze it.
//and try to recover.
if(iObserver)
{
iob server-& gt； HandleNetworkInfoError(a error)；
}
Return KErrNone
}