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<task id="GUID-1941FC6C-4E2B-5549-96C8-6090DB0C40E1" xml:lang="en"><title>Activity

Manager Tutorial</title><abstract><p>This section explains how to implement Activity Manager. </p><p>An

object of the <codeph>CUserActivityManager</codeph> class must be included

as a member of the component which need to react to activity and inactivity.</p></abstract><prolog><metadata><keywords/></metadata></prolog><taskbody>

<steps id="GUID-725EB747-9C99-5E57-A016-D10DC436BD2B">

<step id="GUID-F69BA9F9-AC38-5866-A67F-E652673B0580"><cmd/>

<info>Create an object of <codeph>CUserActivityManager</codeph>. </info>

</step>

<step id="GUID-12BE60E0-5B72-5F55-933B-4447D704C8AA"><cmd/>

<info>Create an activity callback function implementing the transition to

device activity. </info>

</step>

<step id="GUID-A4D01DE0-8893-5B3D-BB77-7495CBA8149A"><cmd/>

<info>Create an inactivity callback function implementing the transition to

device inactivity. </info>

</step>

<step id="GUID-D88E0CAA-E804-5056-A2C6-13B763CCB3C5"><cmd/>

<info>Call the <codeph>CUserActivityManager::StartL()</codeph> function using

the object of <xref href="GUID-9159ADC6-DD8E-3DF7-A023-96E1ABCB14FC.dita"><apiname>CUserActivityManager</apiname></xref>. This function accepts

the following three arguments: </info>

<info><p><ul>

<li><p>an integer representing the inactivity interval in seconds, </p></li>

<li><p>the inactivity callback, and</p></li>

<li><p>the activity callback.</p></li>

</ul></p></info>

<info>The callback arguments are instances of <xref href="GUID-6C5766BC-05DE-32A8-993D-6BB582931F43.dita"><apiname>TCallBack</apiname></xref>. </info>

</step>

</steps>

<example><title>Activity manager example</title> <codeblock id="GUID-DBD2391D-F2DE-5905-9A8B-695C18699554" xml:space="preserve">#include &lt;activitymanager.h&gt;

…

// Activity Manager instance is created and started

void CSomeComponent::ConstructL()

    {

    …

    iActivityManager = CUserActivityManager::NewL( CActive::EPriorityStandard );

    iActivityManager->StartL( iTimeout,

                   TCallBack( HandleInactiveEvent, this ),

                   TCallBack( HandleActiveEvent, this ) );

    …

    }

…

// Handles inactive event

TInt CSomeComponent::HandleInactivityEvent( TAny* aPtr )

    {

    // Code to be executed in case of user inactivity

    …

    }

// Handles active event

TInt CSomeComponent::HandleActivityEvent( TAny* aPtr )

    {

    // Code to be executed in case of user activity after an inactivity period.

    …

    }

</codeblock> </example>

</taskbody><related-links>

<link href="GUID-7FCDBDFB-6548-52D2-A18D-608FC8F151A3.dita"><linktext>Activity

Manager Overview</linktext></link>

</related-links></task>