| author | Eugene Ostroukhov <eugeneo@symbian.org> |
| Thu, 15 Jul 2010 10:08:51 -0700 | |
| changeset 450 | ed815e0eef9a |
| parent 229 | 716254ccbcc0 |
| permissions | -rw-r--r-- |
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<!DOCTYPE html |
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><meta name="copyright" content="(C) Copyright 2009"/><meta name="DC.rights.owner" content="(C) Copyright 2009"/><meta name="DC.Type" content="mobileconcept"/><meta name="DC.Title" content="ILocation.GetLocation()"/><meta name="DC.Relation" scheme="URI" content="GUID-7A0190CB-545E-48D2-BAF0-D28E03CDFCA5"/><meta name="DC.Relation" scheme="URI" content="GUID-7C69DDA4-16F1-4A8F-BDB2-4CB0015B4E81"/><meta name="DC.Relation" scheme="URI" content="GUID-65AAF569-D347-462B-B59A-9D7CA184AB9C"/><meta name="DC.Relation" scheme="URI" content="GUID-53CE4DE6-F065-4339-8C18-5C30A9540053"/><meta name="DC.Format" content="XHTML"/><meta name="DC.Identifier" content="GUID-150E440F-56E4-4249-8739-A5A7A2050600"/><title>ILocation.GetLocation() </title><script type="text/javascript"> |
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function initPage() {}
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</script><link href="../PRODUCT_PLUGIN/book.css" rel="stylesheet" type="text/css"/><link href="css/s60/style.css" rel="stylesheet" type="text/css" media="all"/></head><body onload="initPage();"><div class="body"><div class="contentLeft prTxt"><h1 class="pageHeading" id="GUID-150E440F-56E4-4249-8739-A5A7A2050600"><span>ILocation.</span>GetLocation()</h1><div> |
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<p><strong>Description:</strong></p> |
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<p>The <code>GetLocation</code> method retrieves the current location |
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of the device.</p> |
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<p>This method can be called both synchronously and asynchronously.</p> |
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<p><strong>Syntax:</strong></p> |
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<p>For synchronous calls:</p> |
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<pre class="codeblock" id="GUID-7CD9AD3A-D065-4F76-A3FF-D524249CBF65-GENIDd0e47808">result = so.ILocation.GetLocation(criteria);</pre> |
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<p>For asynchronous calls:</p> |
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<pre class="codeblock" id="GUID-F1140A2E-9B60-4953-8C6E-1A6C47461241-GENIDd0e47814">result = so.ILocation.GetLocation(criteria, callback);</pre> |
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<p><strong>Arguments:</strong></p> |
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<ul> |
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<li><p><code>criteria</code>:</p> |
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<p>This is an object that specifies what type of device location information |
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is returned and how. For more information about the object properties and |
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how to define them, see section <a href="GUID-4541E532-CC1A-4115-8467-7FA1C4378307.html#GUID-4541E532-CC1A-4115-8467-7FA1C4378307">Criteria for retrieving location information</a>.</p> |
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</li> |
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<li><p><code>callback</code>:</p> |
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<p>The <code>callback</code> argument is the name of the method |
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that is executed when an asynchronous <code>GetLocation</code> call |
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has results or status information to return. You must define this method separately. |
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Follow the instructions in section <a href="GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608.html#GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608">Defining the callback handler for an asynchronous method</a> to |
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define the <code>callback</code> method.</p> |
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<p>This argument is used only with an asynchronous <code>GetLocation</code> call.</p> |
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</li> |
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</ul> |
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<p><strong>Return value:</strong></p> |
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<p>If synchronous, the <code>GetLocation</code> method returns |
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an object that contains the requested location information, an error code, |
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and an error message.</p> |
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<div class="tablenoborder"><a name="GUID-B8FBADEC-F18E-4055-8BAA-9CC36071CF30"><!----></a><table cellpadding="4" cellspacing="0" summary="" id="GUID-B8FBADEC-F18E-4055-8BAA-9CC36071CF30" frame="border" border="1" rules="all"><caption><strong>Table: </strong>Return value |
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properties for a synchronous GetLocation</caption> |
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<thead align="left"> |
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<tr class="title "><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e47242"> |
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<p>Property</p> |
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</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e47247"> |
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<p>Description</p> |
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</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e47252"> |
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<p>Value</p> |
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</th></tr> |
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</thead> |
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<tbody> |
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<tr class=""> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47242 "> |
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<p><code>result.ReturnValue</code></p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47247 "> |
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<p>This is an object that contains the requested location information.</p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47252 "> |
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<p>See <a href="GUID-A6C9AF19-6694-478B-A9FE-7898A2091C4B.html#GUID-A6C9AF19-6694-478B-A9FE-7898A2091C4B">Returned location information</a>.</p> |
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</td> |
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</tr> |
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<tr class="bg "> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47242 "> |
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<p><code>result.ErrorCode</code></p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47247 "> |
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<p>This is a number that specifies a predefined error code.</p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47252 "> |
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<p>See <a href="GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4.html#GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4">Service API error codes</a>.</p> |
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</td> |
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</tr> |
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<tr class=""> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47242 "> |
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<p><code>result.ErrorMessage</code></p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47247 "> |
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<p>This is a text string that describes the error.</p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47252 "> |
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<p>See <a href="GUID-DEA4164E-5F03-4B57-97B9-4C6238481F89.html#GUID-DEA4164E-5F03-4B57-97B9-4C6238481F89">Location Service API error messages</a>.</p> |
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</td> |
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</tr> |
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</tbody> |
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</table></div> |
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<p>If asynchronous, the <code>GetLocation</code> method returns |
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an object that contains the initial return value for the asynchronous call |
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it started (see the following table). The actual location information is returned |
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by the <a href="GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608.html#GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608"><code>callback</code></a> method |
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in the <code>ReturnValue</code> property of its result object. The |
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returned information is described in section <a href="GUID-A6C9AF19-6694-478B-A9FE-7898A2091C4B.html#GUID-A6C9AF19-6694-478B-A9FE-7898A2091C4B">Returned location information</a>.</p> |
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<div class="tablenoborder"><a name="GUID-2B366CA4-628F-41E0-AD55-0B2A882457E5"><!----></a><table cellpadding="4" cellspacing="0" summary="" id="GUID-2B366CA4-628F-41E0-AD55-0B2A882457E5" frame="border" border="1" rules="all"><caption><strong>Table: </strong>Return value |
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properties for an asynchronous GetLocation</caption> |
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|
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<thead align="left"> |
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<tr class="title "><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e47364"> |
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<p>Property</p> |
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</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e47369"> |
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<p>Description</p> |
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</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e47374"> |
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<p>Value</p> |
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</th></tr> |
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</thead> |
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<tbody> |
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<tr class=""> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47364 "> |
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<p><code>result.TransactionID</code></p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47369 "> |
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<p>This is a number used as an identification to match transactions started |
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with the asynchronous <code>GetLocation</code> call to one or more |
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calls it generates to <code>callback</code>.</p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47374 "> </td> |
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</tr> |
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<tr class="bg "> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47364 "> |
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<p><code>result.ErrorCode</code></p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47369 "> |
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<p>This is a number that specifies a predefined error code.</p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47374 "> |
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<p>See <a href="GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4.html#GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4">Service API error codes</a>.</p> |
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</td> |
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</tr> |
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<tr class=""> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47364 "> |
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<p><code>result.ErrorMessage</code></p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47369 "> |
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<p>This is a text string that describes the error.</p> |
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</td> |
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e47374 "> |
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<p>See <a href="GUID-DEA4164E-5F03-4B57-97B9-4C6238481F89.html#GUID-DEA4164E-5F03-4B57-97B9-4C6238481F89">Location Service API error messages</a>.</p> |
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</td> |
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</tr> |
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</tbody> |
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</table></div> |
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<p><strong>Remarks:</strong></p> |
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<ul> |
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<li><p>The availability of specific location information depends |
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on the underlying GPS technology. Other factors, such as the number of satellites |
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available for a location fix, also affect what information can be returned. |
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You can change the positioning system used by an S60 device from the <strong>Settings |
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> General > Positioning > Positioning methods</strong> menu.</p></li> |
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<li><p>It takes time to retrieve the initial position fix. Subsequent |
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requests are faster.</p></li> |
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</ul> |
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<p><strong>Example code:</strong></p> |
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<p/> |
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<p>For the complete source of a sample widget |
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that demonstrates how to use this Service API, see <a href="GUID-620340F8-F844-445E-80AA-71C757320B7E.html#GUID-620340F8-F844-445E-80AA-71C757320B7E">the |
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full example</a>.</p> |
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|
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</div></div></div><div class="footer"><hr/><div class="copy">© Nokia 2009.</div></div></body></html> |