Solution to Symbian Address Book listening

To add and delete the listening Symbian Address Book, I found the following code about the address book listening:

This is a simplified example of the code lines needed for the contacts observer. (from Nokia Technical Library)

// Application UI owns contact observer

Class ceventsappui: Public ceikappui
{

Public:

Void constructl ();
~ Ceventsappui ();

Public:

Void handlecommandl (tint acommand );

PRIVATE:

Ceventsappview * iappview; // owns

Ceventscontacts * icontactobserver; // data observer

};

Void ceventsappui: constructl ()

{

Baseconstructl (); // call base Constructor

Iappview = ceventsappview: newl (clientrect ());

Addtostackl (iappview );

// Create an observer

Icontactobserver = new (eleave) ceventscontacts (iappview );

Icontactobserver-> constructl ();

}

// Ceventscontacts implements mcontactdbobserver Interface

Class ceventscontacts: Public cbase, public mcontactdbobserver

{

Public:

Ceventscontacts (ceventsappview * aappview );

Void constructl ();

~ Ceventscontacts ();

// Override the virtual function of mcontactdbobserver

Void handledatabaseeventl (tcontactdbobserverevent aevent );

PRIVATE:

Ccontactdatabase * icontactdb;

Ccontactchangenotifier * inotifier;

Ceventsappview * iappview;

};

Ceventscontacts: ceventscontacts (ceventsappview * aappview)

: Iappview (aappview)

{

}

Void ceventscontacts: constructl ()

{

// Open the database

Icontactdb = ccontactdatabase: openl ();

// Register the observer

Inotifier = ccontactchangenotifier: newl (* icontactdb, this );

}

Ceventscontacts ::~ Ceventscontacts ()

{

Delete inotifier;

Delete icontactdb;

}

Void ceventscontacts: handledatabaseeventl (tcontactdbobserverevent
Aevent)

{

// The changed item

Tcontactitemid contactitem = aevent. icontactid;

Switch (aevent. itype)

{

Case econtactdbobservereventcontactchanged:

// Handle contact changed event

Break;

Case econtactdbobservereventcontactdeleted:

// Handle contact deleted event

Break;

Case econtactdbobservereventcontactadded
// Handle contact added event
Break;
...

Default:

Break;

}

}

Integrate the code into my program and add library cntmodel. Lib // For contact to the matrix containing the header file # include <cntdbobs. h>
# Include <cntdb. h> # include <cntdef. h> where cntdbobs. h defines tcontactdbobserverevent

 

The following error occurs:

C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdbobs. h: 96: Undefined identifier 'tcontactitemid'
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdbobs. h: 96: (encoded ded from:
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdbobs. h: 96: C:/Symbian/carbide/workspace/helloworld/INC/eventscontacts. h: 17
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdbobs. h: 96: C:/Symbian/carbide/workspace/helloworld/INC/helloworldappui. h: 15
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdbobs. h: 96: C:/Symbian/carbide/workspace/helloworld/src/helloworlddocument. cpp: 11)
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: identifier 'tcontactitemid' redeclared
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: was declared as: 'int'
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: Now declared as: 'Long'
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: (encoded ded from:
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdb. h: 13
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/carbide/workspace/helloworld/INC/eventscontacts. h: 18
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/carbide/workspace/helloworld/INC/helloworldappui. h: 15
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/carbide/workspace/helloworld/src/helloworlddocument. cpp: 11)
../Src/helloworldappui. cpp: 299: Warning: Preprocessor # warning Directive
../Src/helloworldappui. cpp: 299: Warning: # warning "Please see comment about help and uid3 ..."
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdbobs. h: 96: Undefined identifier 'tcontactitemid'
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: identifier 'tcontactitemid' redeclared
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: was declared as: 'int'
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: Now declared as: 'Long'
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: (encoded ded from:
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdb. h: 13
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/carbide/workspace/helloworld/INC/eventscontacts. h: 18
C:/Symbian/9.1/s60_3rd_mr/epoc32/include/cntdef. h: 71: C:/Symbian/carbide/workspace/helloworld/src/eventscontacts. cpp: 11)
../Src/eventscontacts. cpp: 56: Undefined identifier 'icontactid'

This is obviously a redefinition, but I don't know which file has defined my own things for a long time and it hasn't solved the problem.

I don't know which header file is redundant.

The header file # include <cntdbobs. h> remove the content defined in the two header files to avoid conflict. Because today there is no time to write the response code. I don't know which header file should be removed, but I find that the header file is not all required, even if you find which one it's not always useful.

Lessons learned