Telephony API using Qt Mobile Extension

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Article

Created: chintandave_er (07 Nov 2010)

Last edited: hamishwillee (11 Oct 2012)

This article shows how you can use the Qt Telephony Mobile Extension (XQTelephony) to make circuit switched calls and get call status notifications.

Warning: Note that Archived:Mobile Extensions are deprecated, and cross platform Qt Mobility APIs should be used instead. However at time of writing Qt Mobility 1.1 does not have telephony support.

Precondition

• In order to use an extension you need to add the source files of that extension to your project in your IDE and build them together as part of your application source codes.
• You can get more information about Mobile extension from Archived:Mobile Extensions
• Please read this Wiki article for How to use Mobile Extension APIs in Qt

Headers

#include <XQTelephony>

Making a Circuit-Switched Telephone Call

XQTelephony* telephony = new XQTelephony(this);
telephony->call("+9190000000000");

Get Notification of the call status change

    XQTelephony* telephony = new XQTelephony(this);
 
    // Connect lineStatusChanged() Signal to handleStatusChange() Slot
    connect(telephony, SIGNAL(lineStatusChanged(XQTelephony::LineStatus, QString)),this, SLOT(handleStatusChange(XQTelephony::LineStatus, QString)));
 
    // Our slot for handling telephone line status changes
    void MyTelephoneLineListener::handleLineStatusChange(XQTelephony::LineStatus status, QString number)
    {
        switch(status)
        {
 
            case XQTelephony::StatusRinging:
            {
 
            }
            case XQTelephony::StatusIdle:
            {
 
            }
            case XQTelephony::StatusDialling:
            {
 
            }
            case XQTelephony::StatusConnecting:
            {
 
            }
            case XQTelephony::StatusConnected:
            {
 
            }
            case XQTelephony::StatusDisconnecting:
            {
 
            }
            case XQTelephony::StatusHold:
            {
 
            }
            case XQTelephony::StatusTransferring:
            {
 
            }	
        }
 
    }

Get Notification for the Incoming call

To get notification for incoming call, the LineStatus of the call is StatusRinging

XQTelephony* telephony = new XQTelephony(this);
 
// Connect lineStatusChanged() Signal to handleStatusChange() Slot
connect(telephony, SIGNAL(lineStatusChanged(XQTelephony::LineStatus, QString)),this, SLOT(handleStatusChange(XQTelephony::LineStatus, QString)));
 
// Our slot for handling telephone line status changes
void MyTelephoneLineListener::handleLineStatusChange(XQTelephony::LineStatus status, QString number)
{
          switch(status)
          {
	                 // get notification for incoming call
                          case XQTelephony::StatusRinging:
                           {
                                        // Incoming call comes. 
                                        // add action 
                           }
          }
 }