symbian 监听来电状态

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/*
============================================================================
Name       : TelephoneListener.h
Author   :
Version     : 1.0
Copyright   : Your copyright notice
Description : CTelephoneListener declaration
============================================================================
*/
#ifndef TELEPHONELISTENER_H
#define TELEPHONELISTENER_H
#include <e32base.h> // For CActive, link against: euser.lib
#include <Etel3rdParty.h>
class MTelephoneListenerObserver
{
public:
    virtual void TelephoneStatusChanged(CTelephony::TCallStatus aStatus) = 0;
};
class CTelephoneListener : public CActive
    {
public:
    // Cancel and destroy
    ~CTelephoneListener();
    // Two-phased constructor.
    static CTelephoneListener* NewL(MTelephoneListenerObserver& aObserver);
    // Two-phased constructor.
    static CTelephoneListener* NewLC(MTelephoneListenerObserver& aObserver);
public:
    // New functions
    // Function for making the initial request
    void StartL(TTimeIntervalMicroSeconds32 aDelay);
private:
    // C++ constructor
    CTelephoneListener(MTelephoneListenerObserver& aObserver);
    // Second-phase constructor
    void ConstructL();
private:
    // From CActive
    // Handle completion
    void RunL();
    // How to cancel me
    void DoCancel();
    // Override to handle leaves from RunL(). Default implementation causes
    // the active scheduler to panic.
    TInt RunError(TInt aError);
private:
    enum TTelephoneListenerState
        {
        EUninitialized, // Uninitialized
        EInitialized, // Initalized
        EError
        // Error condition
        };
private:
    TInt iState; // State of the active object

    MTelephoneListenerObserver* iObserver;
    CTelephony* iTel;
    CTelephony::TCallStatusV1 iCallStatus;
    CTelephony::TCallStatusV1Pckg iCallStatusPckg;
    };
#endif // TELEPHONELISTENER_H
/*
============================================================================
Name  : TelephoneListener.h
Author   :
Version : 1.0
Copyright   : Your copyright notice
Description : CTelephoneListener declaration
============================================================================
*/
#ifndef TELEPHONELISTENER_H
#define TELEPHONELISTENER_H
#include <e32base.h> // For CActive, link against: euser.lib
#include <Etel3rdParty.h>
class MTelephoneListenerObserver
{
public:
virtual void TelephoneStatusChanged(CTelephony::TCallStatus aStatus) = 0;
};
class CTelephoneListener : public CActive
{
public:
// Cancel and destroy
~CTelephoneListener();
// Two-phased constructor.
static CTelephoneListener* NewL(MTelephoneListenerObserver& aObserver);
// Two-phased constructor.
static CTelephoneListener* NewLC(MTelephoneListenerObserver& aObserver);
public:
// New functions
// Function for making the initial request
void StartL(TTimeIntervalMicroSeconds32 aDelay);
private:
// C++ constructor
CTelephoneListener(MTelephoneListenerObserver& aObserver);
// Second-phase constructor
void ConstructL();
private:
// From CActive
// Handle completion
void RunL();
// How to cancel me
void DoCancel();
// Override to handle leaves from RunL(). Default implementation causes
// the active scheduler to panic.
TInt RunError(TInt aError);
private:
enum TTelephoneListenerState
  {
  EUninitialized, // Uninitialized
  EInitialized, // Initalized
  EError
  // Error condition
  };
private:
TInt iState; // State of the active object

MTelephoneListenerObserver* iObserver;
CTelephony* iTel;
    CTelephony::TCallStatusV1 iCallStatus;
    CTelephony::TCallStatusV1Pckg iCallStatusPckg;
};
#endif // TELEPHONELISTENER_H

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/*
============================================================================
Name       : TelephoneListener.cpp
Author   :
Version     : 1.0
Copyright   : Your copyright notice
Description : CTelephoneListener implementation
============================================================================
*/
#include "TelephoneListener.h"
CTelephoneListener::CTelephoneListener(MTelephoneListenerObserver& aObserver)
:CActive(EPriorityStandard), // Standard priority
iObserver(&aObserver),
iCallStatusPckg(iCallStatus)
{
    iCallStatus.iStatus = CTelephony::EStatusUnknown;
}
CTelephoneListener* CTelephoneListener::NewLC(MTelephoneListenerObserver& aObserver)
{
    CTelephoneListener* self = new (ELeave) CTelephoneListener(aObserver);
    CleanupStack::PushL(self);
    self->ConstructL();
    return self;
}
CTelephoneListener* CTelephoneListener::NewL(MTelephoneListenerObserver& aObserver)
{
    CTelephoneListener* self = CTelephoneListener::NewLC(aObserver);
    CleanupStack::Pop(); // self;
    return self;
}
void CTelephoneListener::ConstructL()
{
    //User::LeaveIfError(iTimer.CreateLocal()); // Initialize timer
    iTel = CTelephony::NewL();
    CActiveScheduler::Add(this); // Add to scheduler
}
CTelephoneListener::~CTelephoneListener()
{
    Cancel(); // Cancel any request, if outstanding
    DoCancel();
    delete iTel;
    iTel = NULL;

}
void CTelephoneListener::DoCancel()
{
    iTel->CancelAsync(CTelephony::EVoiceLineStatusChangeCancel);
}
void CTelephoneListener::StartL(TTimeIntervalMicroSeconds32 aDelay)
{
    Cancel();
    iState = EUninitialized;

    iTel->NotifyChange( iStatus,
            CTelephony::EVoiceLineStatusChange,
            iCallStatusPckg );
    SetActive();
}
void CTelephoneListener::RunL()
{
    if( iStatus == KErrNone )
    {
        iObserver->TelephoneStatusChanged(iCallStatus.iStatus);
        iTel->NotifyChange( iStatus,
                CTelephony::EVoiceLineStatusChange,
                iCallStatusPckg );
    }
    SetActive();
}
TInt CTelephoneListener::RunError(TInt aError)
{
    return aError;
}

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/sariy/archive/2009/12/01/4913409.aspx