Answer Incoming Call doesn't work properly

[mynick1000]

Hi,

I am new at symbian programming. I developed an app to observe incoming calls and auto answer them.

I wrote the code below. It answers the first incoming call automatically and exits without giving any error.

I want it to re-observe new incoming calls after the first call completed. (Back to the start of the RunL).

What may be wrong with this code?



CallObserver.cpp

void CCallObserver::Start()
{
iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

void CCallObserver::Stop()
{
Cancel() ;
}

void CCallObserver::RunL()
{
if(iStatus == KErrNone)
{
CTelephony::TCallStatus status = iLineStatus.iStatus;

if(CTelephony::EStatusRinging == status)
{
iTelephony->AnswerIncomingCall(iStatus, iCallId);
SetActive() ;
}
}

iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

MyAppUi.cpp

CTelephony *telApi = CTelephony::NewL() ;
callObserver = new (ELeave) CCallObserver( telApi ) ;
callObserver->Start();

[mynick1000]

I found the problem that, I call AnswerIncomingCall passing iStatus (asynchronous) and then when I call NotifyChange, I am also passing the same iStatus ie the same Active object. I am not allowed to do this. Only one outstanding request can be made per Active object.

But I could'nt find the solution, what do I have to use for AnswerIncomingCall as first parameter?

Please help. Regards.

[saji_iq]

try this code , it will work for you.

TRequestStatus iiStatus;
iTelephony->AnswerIncomingCall(iiStatus, iCallId);
User::WaitForRequest(iiStatus);

there is another way , write you answeicomming call code in a separate thread and communicate with both active objects using callbacks

[mynick1000]

Hi saji_iq,

Thanks for the response. I have changed the code like below. Now it does not exit after first call, but still does not answer the next incoming call (ringing).

Do you have a suggestion for this situation?

Regards

void CCallObserver::Start()
{ 
iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

void CCallObserver::Stop()
{
Cancel() ;
}

void CCallObserver::RunL()
{
if(iStatus == KErrNone)
{
CTelephony::TCallStatus status = iLineStatus.iStatus;

if(CTelephony::EStatusRinging == status)
{
TRequestStatus iiStatus;
iTelephony->AnswerIncomingCall(iiStatus, iCallId);
User::WaitForRequest(iiStatus);
SetActive() ;
}
}

iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

[ltomuta]

try this code , it will work for you.

TRequestStatus iiStatus;
iTelephony->AnswerIncomingCall(iiStatus, iCallId);
User::WaitForRequest(iiStatus);

there is another way , write you answeicomming call code in a separate thread and communicate with both active objects using callbacks

Never use User::WaitForRequest() in conjunction with CTelephony.. See TSS000374

Hi saji_iq,

Thanks for the response. I have changed the code like below. Now it does not exit after first call, but still does not answer the next incoming call (ringing).

Do you have a suggestion for this situation?

Regards

void CCallObserver::Start()
{ 
iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

void CCallObserver::Stop()
{
Cancel() ;
}

void CCallObserver::RunL()
{
if(iStatus == KErrNone)
{
CTelephony::TCallStatus status = iLineStatus.iStatus;

if(CTelephony::EStatusRinging == status)
{
TRequestStatus iiStatus;
iTelephony->AnswerIncomingCall(iiStatus, iCallId);
User::WaitForRequest(iiStatus);
SetActive() ;
}
}

iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

Never use User::WaitForRequest() inside of an active object.

[mynick1000]

Thanks for the warning Itomuta,

Now I have removed the WaitForRequest(iiStatus) part from the code.

Can I use this code in a way to answer incoming call without exiting after answering the initial incoming call and continues working?

Scenario is like this :

1. Observe incoming call
1. Answer incoming call
2. Make conversation
3. Hangup the call
4. Observe new incoming call
5. Answer it ...

[saji_iq]

Of course it is not recmended to use waitforrequest in an active object , instead use another object where needed, cos waitforrequest make the asynchrouns call to synchornous and that is not good and will create problems,

[mynick1000]

Hi,

Now I try to use two active objects, one for observing incoming calls and other events, and one for answering the incoming call. I have changed the code like below. But when app gets a call, phone reboots. I read lots of threads and some docs, but I couldn't manage it.

Please help me answering calls without exting.

Regards, thanks.



CallObserver.cpp

void CCallObserver::Start()
{ 
iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

void CCallObserver::Stop()
{
Cancel() ;
}

void CCallObserver::RunL()
{
if(iStatus == KErrNone)
{
CTelephony::TCallStatus status = iLineStatus.iStatus;

if(CTelephony::EStatusRinging == status)
{
AnswerCall(}
}

iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

void CCallObserver::AnswerCall()
{
callAnswer = new (ELeave) CAnswerCall( iTelephony ) ;
callAnswer->AnswerCall() ;
}

AnswerCall.cpp

#include "AnswerCall.h"

CAnswerCall::CAnswerCall(CTelephony* aTelephony)
    : CActive(EPriorityStandard),
      iTelephony(aTelephony)
{
    //default constructor
}

void CAnswerCall::AnswerCall()
{
    iTelephony->AnswerIncomingCall(iStatus, iCallId);
    SetActive();
}

void CAnswerCall::RunL()
{
    if(iStatus==KErrNone)
       {} // The call has been answered successfully;
}

void CAnswerCall::DoCancel()
{
    iTelephony->CancelAsync(CTelephony::EAnswerIncomingCallCancel);
}

[mynick1000]

Hi again,

I have removed iTelephony->AnswerIncomingCall(iStatus, iCall) function and discovered that app still exits. The problem is not about AnswerIncomingCall function.

I run the code below. If a call comes, it shows the "EStatusRinging" dialog and exits. Phone continues ringing as expected.

What may cause the exiting?

Regards...

void CCallObserver::Start()
{ 
iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

void CCallObserver::Stop()
{
Cancel() ;
}

void CCallObserver::RunL()
{
if(iStatus == KErrNone)
{
CTelephony::TCallStatus status = iLineStatus.iStatus;

if(CTelephony::EStatusRinging == status)
{
TBuf <20> lTest = _L("EStatusRinging") ;
CEikonEnv::Static()->AlertWin(lTest);
SetActive() ;
}
else if(CTelephony::EStatusConnecting == status)
{
TBuf <20> lTest = _L("EStatusConnecting") ;
CEikonEnv::Static()->AlertWin(lTest);
SetActive() ;
}
else if(CTelephony::EStatusConnected == status)
{
TBuf <20> lTest = _L("EStatusConnected") ;
CEikonEnv::Static()->AlertWin(lTest);
SetActive() ;
}

TBuf <20> lTest = _L("next notification request") ;
CEikonEnv::Static()->AlertWin(lTest);

iTelephony->NotifyChange( iStatus, CTelephony::EVoiceLineStatusChange, iLineStatusPckg );
SetActive();
}

[kis_spn]

Hi MyNick,

I've seen your problem....There are problem due to active objects ..that's why it's exit...try to call handle in this way......

void CCallListener :: ListenL()
{
Cancel();
iEvent = CTelephony::EVoiceLineStatusChange;
iTel->NotifyChange(iStatus,iEvent,iLineStatusPckg);
SetActive();
}

void CCallListener :: RunL()
{
if(iStatus.Int()!=KErrNone)
{
ListenL();
return;
}

switch(iLineStatus.iStatus)
{
case CTelephony::EStatusRinging:
{
iTel->AnswerIncomingCall( iStatus, iCallId, CTelephony::EVoiceLine );
SetActive();
break;
}
case CTelephony::EStatusConnected:
case CTelephony::EStatusAnswering:
{
iEvent = CTelephony::EVoiceLineStatusChange;
iTel->NotifyChange(iStatus, iEvent, iLineStatusPckg);
SetActive();
break;
}
case CTelephony::EStatusDisconnecting:
case CTelephony::EStatusIdle:
{
//Listen again new Call.....
ListenL();
break;
}
default:
{
iEvent = CTelephony::EVoiceLineStatusChange;
iTel->NotifyChange(iStatus, iEvent, iLineStatusPckg);
SetActive();
break;
}

}

}

//Use this code, Hope It'll solve your problem.....
//It's working fine for me......

[aamitgupta]

Hi Mynic

Yoy are going right , please go through following link, i hope it will very use full in CTelephony for dia, answer, and many more operations.

http://developer.uiq.com/devlib/uiq_...ony/index.html

with best Regards
Amit

[paipeng]

Hello, I got the Answer Call working before, but now it doesn't.

I got the same problem, after answering, the application is crashed.

I have tried also not through the AnswerIncomingCall function, but by pressing the GREEN answer button manuelly. It crashed, too.

It looks like the problem on active object [SetActive()]:
just aftering in RunL():
case CTelephony::EStatusAnswering: // 4
RequestNotification(); // crashed after 'SetActive()'

Can anybody check out the problem reasons?!

Thanks a lot

Pai

void CTelephoneEngine::RequestNotification()
	{
	LogL(_L("Request Notification\n"));
iTelephony->NotifyChange(iStatus,CTelephony::EVoiceLineStatusChange,iLineStatusPckg );
	LogL(_L("SetActive..."));
	SetActive();
	}

and

void CTelephoneEngine::RunL()
	{
	//LogL(_L("RunL IN\n"));
	
    if(iStatus != KErrNone)
    	{
    	// ***********Handle Error here ************
   		LogL(_L("Error by status\n"));
   		TBuf<32> ecode;
   		ecode.Format(_L("ErrorNo: %d\n"), iStatus.Int());
   		LogL(ecode);
   		return;
    	}
    
	switch (iLineStatus.iStatus)
		{
		case CTelephony::EStatusIdle: // 1
			{
        	LogL(_L("Status: Idle\n"));
        	//iNotifier.TelephoneReadyL();
    		RequestNotification();
			break;	
			}
		case CTelephony::EStatusDialling: // 2
			{
			LogL(_L("Status: Dialling\n"));
			//iNotifier.TelephoneDialingL();
			RequestNotification();
			break;
			}
		case CTelephony::EStatusRinging: // 3
			{
        	LogL(_L("Status: Ringing\n"));
			//AnswerCallL();
			RequestNotification();
    		break;
			}
        case CTelephony::EStatusAnswering: // 4
        	{
        	LogL(_L("Status: Answering\n"));
        	//iNotifier.TelephoneAnsweringL();
    		RequestNotification();
        	break;
        	}
        case CTelephony::EStatusConnecting: // 5
        	{
        	LogL(_L("Status: Connecting\n"));
        	//iNotifier.TelephoneConnectingL();
    		RequestNotification();
        	break;
        	}
        case CTelephony::EStatusConnected: // 6
        	{
        	LogL(_L("Status: Connected\n"));
        	//iNotifier.TelephoneConnectedL();
    		RequestNotification();
        	break;
        	}
        case CTelephony::EStatusDisconnecting: // 8
        	{
        	LogL(_L("Status: Disconnecting\n"));
        	//iNotifier.TelephoneCloseL();
			RequestNotification();
        	break;
        	}
        default:
        	{
        	//LogL(_L("default: wait for notify change!\n"));
        	TBuf<32> sCode;
        	sCode.Format(_L("Status: %d\n"), iLineStatus.iStatus);
        	LogL(sCode);
    		RequestNotification();
        	break;            
        	}
		}
		
	}

[paipeng]

in DoCancel()

void CTelephoneEngine::DoCancel()
	{
    //iTelephony->CancelAsync(CTelephony::EGetCurrentNetworkInfoCancel);
	LogL(_L("DoCancel..."));
	
	TInt error = iTelephony->CancelAsync(CTelephony::EAnswerIncomingCallCancel);
	if (error != KErrNone)
		LogErrorL(_L("EAnswerIncomingCallCancel error: "), error);
	
	error = iTelephony->CancelAsync(CTelephony::EVoiceLineStatusChangeCancel);
	if (error != KErrNone)
		LogErrorL(_L("EVoiceLineStatusChangeCancel error: "), error);
	}

I don't think the problem on CancelAsync(), because with or without calling the DoCancel() funtion, the problem is same.

[aamitgupta]

What error code raised and what is doing RequestNotification()?

[wizard_hu_]

And what is in the log?