symbian 监听来电状态

在写播放音频时遇到了来电的问题， 故需要监听来电状态

 

 

/* ============================================================================ 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 requestvoid StartL(TTimeIntervalMicroSeconds32 aDelay);private:// C++ constructorCTelephoneListener(MTelephoneListenerObserver& aObserver);// Second-phase constructorvoid ConstructL();private:// From CActive// Handle completionvoid RunL();// How to cancel mevoid DoCancel();// Override to handle leaves from RunL(). Default implementation causes// the active scheduler to panic.TInt RunError(TInt aError);private:enum TTelephoneListenerState{EUninitialized, // UninitializedEInitialized, // InitalizedEError// Error condition};private:TInt iState; // State of the active objectMTelephoneListenerObserver* iObserver;CTelephony* iTel; CTelephony::TCallStatusV1 iCallStatus; CTelephony::TCallStatusV1Pckg iCallStatusPckg;};#endif // TELEPHONELISTENER_H

 

 

/* ============================================================================ Name: TelephoneListener.cpp Author : Version : 1.0 Copyright : Your copyright notice Description : CTelephoneListener implementation ============================================================================ */#include "TelephoneListener.h"CTelephoneListener::CTelephoneListener(MTelephoneListenerObserver& aObserver) :CActive(EPriorityStandard), // Standard priorityiObserver(&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 timeriTel = CTelephony::NewL();CActiveScheduler::Add(this); // Add to scheduler}CTelephoneListener::~CTelephoneListener(){Cancel(); // Cancel any request, if outstandingDoCancel();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;}