专题一 Symbian如何获取通讯参数之Signal Strength

一、开发环境

IDE：Carbide.C++2.0

SDK：S60 3rd

二、功能介绍

获取手机信号的强弱（Signal Strength）。

三、开发说明

S60 3rd版本中，手机信号量的获取与之前的版本有很大的区别。主要是通过CTelephony的GetNetworkInfo()函数获取，本文提供的是SDK中的一个例子：

#include <e32base.h>
#include <Etel3rdParty.h>

class CClientApp : public CActive
{

private:
CTelephony* iTelephony;
CTelephony::TSignalStrengthV1 iSigStrengthV1;
CTelephony::TSignalStrengthV1Pckg iSigStrengthV1Pckg;

public:
CClientApp(CTelephony* aTelephony);
void SomeFunction();

private:
/*
These are the pure virtual methods from CActive that
MUST be implemented by all active objects
*/
void RunL();
void DoCancel();
};

CClientApp::CClientApp(CTelephony* aTelephony)
: CActive(EPriorityStandard),
iTelephony(aTelephony),
iSigStrengthV1Pckg(iSigStrengthV1)
{
//default constructor
}

void CClientApp::SomeFunction()
{
iTelephony->GetSignalStrength(iStatus, iSigStrengthV1Pckg);
SetActive();
}

void CClientApp::RunL()
{
if(iStatus==KErrNone)
{
TInt32 sigStrength = iSigStrengthV1.iSignalStrength;
TInt8 bar = iSigStrengthV1.iBar;
}
}

void CClientApp::DoCancel()
{
iTelephony->CancelAsync(CTelephony::EGetSignalStrengthCancel);
}