1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

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     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE task

    11   PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

    12 <task xml:lang="en" id="GUID-9EE405E2-2D58-525B-8C33-B1EAC0C5A71A"><title>Network Signal Status Tutorial </title><shortdesc>This tutorial describes how to get the network signal status with the telephony API for applications. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody> <steps id="GUID-457C44A1-1947-51F5-9BBB-7DC61AE2BE3D"> <step id="GUID-DC0EA5D5-2F74-5AEA-B96E-727809E45043"><cmd/><info>create new instance of <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony</apiname></xref>  </info> </step> <step id="GUID-8BB0592B-C650-5FC1-B32A-3D41778D99A2"><cmd/><info>use <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>CTelephony::GetIndicator()</apiname></xref> to get the network signal status information </info> </step> <step id="GUID-0DE72B37-076D-5C92-9439-DC28F91EDB23"><cmd/><info>you can cancel the asynchronous request with a <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>EGetIndicatorCancel</apiname></xref> object </info> </step> <step id="GUID-7841BBB1-8081-5A91-B8D5-5210971EFDB3"><cmd/><info>use the enumeration<xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>EIndicatorChange</apiname></xref> to get the notification of any changes to the network signal status </info> </step> <step id="GUID-6E4772BB-C48B-5613-A1C7-5A5A549F4596"><cmd/><info>cancel the notification request with <xref href="GUID-97D402C8-B4B7-385A-92B3-D3FCC0CA575A.dita"><apiname>EIndicatorChangeCancel</apiname></xref> enumeration. </info> </step> </steps> <example id="GUID-B8922F87-D2CA-5103-B629-628D875CFBBD"><title>Network signal status example</title> <codeblock id="GUID-2EC900DF-10B9-5E63-8F0E-84D396520FDE" xml:space="preserve">#include &lt;e32base.h&gt;

    13 #include <Etel3rdParty.h>

    14 

    15 class CClientApp : public CActive

    16     { 

    17 

    18 private:

    19     CTelephony* iTelephony;

    20     CTelephony::TIndicatorV1 iIndicatorV1;

    21     CTelephony::TIndicatorV1Pckg iIndicatorV1Pckg;

    22 

    23 public:

    24     CClientApp(CTelephony* aTelephony);

    25     void SomeFunction();

    26 

    27 private:

    28     /*

    29        These are the pure virtual methods from CActive that  

    30        MUST be implemented by all active objects

    31        */

    32     void RunL();

    33     void DoCancel();

    34    };

    35 

    36 CClientApp::CClientApp(CTelephony* aTelephony)

    37     : CActive(EPriorityStandard),

    38       iTelephony(aTelephony),

    39       iIndicatorV1Pckg(iIndicatorV1)

    40     {

    41     //default constructor

    42     }

    43 

    44 void CClientApp::SomeFunction()

    45     {

    46     iTelephony->GetIndicator(iStatus, iIndicatorV1Pckg);

    47     SetActive();

    48     }

    49 

    50 void CClientApp::RunL()

    51     {

    52     if(iStatus==KErrNone)

    53        {

    54        if(iIndicatorV1.iCapabilities & CTelephony::KIndNetworkAvailable)

    55           {

    56           // We can detect when a network is present

    57           if(iIndicatorV1.iIndicator & CTelephony::KIndNetworkAvailable)

    58              {} // Network is present

    59           else

    60              {} // Network is no present

    61           }

    62        else

    63           {} // We do not know whether a network is present

    64        }

    65     }

    66 

    67 void CClientApp::DoCancel()

    68     {

    69     iTelephony->CancelAsync(CTelephony::EGetIndicatorCancel);

    70     }</codeblock> </example> </taskbody></task>