| 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="Using platform services"/><meta name="DC.Relation" scheme="URI" content="GUID-E3EA4F85-E0AE-42AB-8E51-EFD3F0E0A51E"/><meta name="DC.Relation" scheme="URI" content="GUID-85179E6B-E915-4D96-A5D1-D17D7C7180C7"/><meta name="DC.Relation" scheme="URI" content="GUID-1EFD7043-E9B8-4B4E-9EA6-A20B3EECC14A"/><meta name="DC.Format" content="XHTML"/><meta name="DC.Identifier" content="GUID-46EABDC1-37CB-412A-ACAD-1A1A9466BB68"/><title>Using |
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platform services </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-46EABDC1-37CB-412A-ACAD-1A1A9466BB68">Using |
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platform services</h1><div> |
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<p>The S60 platform allows <span>widgets</span> installed |
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on S60 mobile devices to:</p> |
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<p/> |
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<ul> |
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<li><p><a href="GUID-E092BF10-C076-4476-9E80-87919940201B.html#GUID-E092BF10-C076-4476-9E80-87919940201B">Access |
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and launch applications on a device</a> using the <a href="GUID-2D651505-F68C-4053-B565-9FF826C5B897.html#GUID-2D651505-F68C-4053-B565-9FF826C5B897">AppManager |
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Service API</a></p></li> |
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<li><p><a href="GUID-AE9A928B-F938-49B5-BC9E-72CB42046571.html#GUID-AE9A928B-F938-49B5-BC9E-72CB42046571">Access |
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and manage calendar information</a> using the <a href="GUID-CABB28B8-D2B1-496B-BD7E-34FF496E60B4.html#GUID-CABB28B8-D2B1-496B-BD7E-34FF496E60B4">Calendar |
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Service API</a></p></li> |
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<li><p><a href="GUID-662F2E2E-9538-42E5-9B5A-5664F1C11A9E.html#GUID-662F2E2E-9538-42E5-9B5A-5664F1C11A9E">Access |
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and manage information about contacts</a> using the <a href="GUID-A5853293-7B83-4CCE-9C29-B2B8F0CD8A18.html#GUID-A5853293-7B83-4CCE-9C29-B2B8F0CD8A18">Contacts |
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Service API</a></p></li> |
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<li><p><a href="GUID-D581028C-06ED-422D-866E-AE6C93075084.html#GUID-D581028C-06ED-422D-866E-AE6C93075084">Access |
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and manage information about landmarks</a> using the <a href="GUID-B8845FF1-D7F6-476A-8651-8B9C12D8789F.html#GUID-B8845FF1-D7F6-476A-8651-8B9C12D8789F">Landmarks |
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Service API</a></p></li> |
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<li><p><a href="GUID-CF55DBA3-2D4C-4FD0-8A06-862E6128F4E7.html#GUID-CF55DBA3-2D4C-4FD0-8A06-862E6128F4E7">Access |
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device logging events</a> using the <a href="GUID-F003B7DD-E450-49AD-B447-C5132FE47D3C.html#GUID-F003B7DD-E450-49AD-B447-C5132FE47D3C">Logging |
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Service API</a></p></li> |
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<li><p><a href="GUID-4DDE31C7-EC0D-4EEC-BC3A-A0B0351154F8.html#GUID-4DDE31C7-EC0D-4EEC-BC3A-A0B0351154F8">Access |
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device location information and perform location-based calculations</a> using |
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the <a href="GUID-53CE4DE6-F065-4339-8C18-5C30A9540053.html#GUID-53CE4DE6-F065-4339-8C18-5C30A9540053">Location Service |
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API</a></p></li> |
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<li><p><a href="GUID-E3D26890-581A-427F-8AFF-16081528A8B8.html#GUID-E3D26890-581A-427F-8AFF-16081528A8B8">Access |
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information about media files stored on a device</a> using the <a href="GUID-E5684FF0-28C9-4721-9421-6B9432087086.html#GUID-E5684FF0-28C9-4721-9421-6B9432087086">Media |
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Management Service API</a></p></li> |
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<li><p><a href="GUID-2240F5BE-97BD-4CB3-8DB3-B5CF7C23BF54.html#GUID-2240F5BE-97BD-4CB3-8DB3-B5CF7C23BF54">Send, |
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retrieve, and manage messages such as SMS and MMS</a> using the <a href="GUID-91579EE5-A608-401C-82B4-DCF1723EC7B5.html#GUID-91579EE5-A608-401C-82B4-DCF1723EC7B5">Messaging |
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Service API</a></p></li> |
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<li><p><a href="GUID-6FBE64B7-0949-4AAE-B835-52B276540A59.html#GUID-6FBE64B7-0949-4AAE-B835-52B276540A59">Access |
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data from the physical sensors of a device</a> using the <a href="GUID-B77C2006-879F-4AC6-B7BF-04B25B563A29.html#GUID-B77C2006-879F-4AC6-B7BF-04B25B563A29">Sensor |
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Service API</a></p></li> |
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<li><p><a href="GUID-E0ED671A-BBDA-4C07-828F-BD35782D9B36.html#GUID-E0ED671A-BBDA-4C07-828F-BD35782D9B36">Access |
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and modify system information on a device</a> using the <a href="GUID-AEB26A58-1DE2-46CB-81EC-6DB3A477B7A3.html#GUID-AEB26A58-1DE2-46CB-81EC-6DB3A477B7A3">SystemInfo |
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Service API<span> of WRT 1.1</span></a></p> |
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</li> |
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<li><p><a href="GUID-E9A578AA-58C5-4902-B418-4CE44EA40D5D.html#GUID-E9A578AA-58C5-4902-B418-4CE44EA40D5D">Access |
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system information and control certain device features</a> using the <a href="GUID-1A678A11-0BDD-4F64-9F40-013F6CDB81D7.html#GUID-1A678A11-0BDD-4F64-9F40-013F6CDB81D7">SystemInfo Service API of |
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WRT 1.0</a></p></li> |
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</ul> |
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<p/> |
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<p>The Service APIs are supported since <a href="GUID-1A3ECAC1-3F09-4602-A1CD-82164040A664.html#GUID-1A3ECAC1-3F09-4602-A1CD-82164040A664">WRT 1.1</a>.</p> |
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<div><h3>Using S60 Platform Services and Service |
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APIs</h3> |
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<p>Widgets use the S60 Platform Services through <a href="GUID-65AAF569-D347-462B-B59A-9D7CA184AB9C.html#GUID-65AAF569-D347-462B-B59A-9D7CA184AB9C">JavaScript |
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Service APIs</a> provided by the Web Runtime environment. Programming a |
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widget to access a service through its Service API involves two steps:</p> |
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<ol> |
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<li id="GUID-4BD63D17-33D3-4AC5-B04C-534DF27F5BFD"><a name="GUID-4BD63D17-33D3-4AC5-B04C-534DF27F5BFD"><!----></a><p>Create a service |
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object (an object for calling the Service API) using the <a href="GUID-04095E9A-50E7-4E5F-BD6F-71DA281A0080.html#GUID-04095E9A-50E7-4E5F-BD6F-71DA281A0080"><code>getServiceObject()</code></a> factory method provided by the <a href="GUID-571AF37F-1E95-462A-92D2-FEA2E62F1559.html#GUID-571AF37F-1E95-462A-92D2-FEA2E62F1559"><code>device</code></a> object. |
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This method uses a service provider name and an interface name to create the |
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appropriate service object:</p> |
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<pre class="codeblock" id="GUID-23173055-CA78-4B8B-ABD9-1C1DCD519C37">var so = device.getServiceObject(provider, interface);</pre> |
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<p>Each Service API has a service provider name and supports one interface. |
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The service provider name identifies the Service API while the interface defines |
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a set of common methods for service objects.</p> |
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<p>For example, the service provider name for the <a href="GUID-CABB28B8-D2B1-496B-BD7E-34FF496E60B4.html#GUID-CABB28B8-D2B1-496B-BD7E-34FF496E60B4">Calendar |
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Service API</a> is <code>Service.Calendar</code> and the supported |
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interface is <code>IDataSource</code>. To create a Calendar service |
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object, use the following code:</p> |
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<pre class="codeblock" id="GUID-7B715229-D37C-4009-B6F6-D4148E41F1B8">var so = device.getServiceObject("Service.Calendar", "IDataSource");</pre>
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</li> |
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<li id="GUID-84C7D2C3-261C-47F5-8ABF-0B2196D3CC2D"><a name="GUID-84C7D2C3-261C-47F5-8ABF-0B2196D3CC2D"><!----></a><p>Use the service |
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object to call the Service API. The calls to the Service API are made through |
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the supported interface, since it provides the necessary methods.</p> |
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<p>For example, the <code>IDataSource</code> interface defines |
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the <code>GetList()</code> method, which returns an object as its |
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return value. To make a <code>GetList()</code> call with the Calendar |
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service object created above, use the following code:</p> |
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<pre class="codeblock" id="GUID-5E760EBA-FBEA-491A-985E-B015C372177C">var result = so.IDataSource.GetList(criteria);</pre> |
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</li> |
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</ol> |
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<p>The only exception to the above is the SystemInfo Service API of WRT |
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1.0, which is a scriptable plug-in. For instructions on using this API, see |
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section <a href="GUID-1A678A11-0BDD-4F64-9F40-013F6CDB81D7.html#GUID-1A678A11-0BDD-4F64-9F40-013F6CDB81D7">JavaScript SystemInfo Service API (WRT 1.0)</a>.</p> |
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</div> |
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<div><h3>Arguments and return values</h3> |
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<p>Service API methods use <span>JavaScript</span> objects as arguments and return |
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values. Argument objects can contain primitive types and other objects. Return |
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value objects can contain primitive types, objects, arrays, and iterators. |
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A primitive type is a string, number, or boolean. An object is a type of <span>JavaScript</span> object. |
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It is a collection of properties. An array is a type of object that stores |
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values that can be primitive types or objects. These values are accessed by |
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indexing. An iterator is an object used to traverse through an ordered list |
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of objects. The <span><code>getNext()</code></span> method |
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on the iterator returns the next object in the ordered list.</p> |
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</div> |
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<div><h3>Creating objects in JavaScript</h3> |
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<p>In JavaScript, you can create an object in three ways.</p> |
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<p><strong>new() with dot notation syntax:</strong></p> |
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<pre class="codeblock" id="GUID-84B514EE-64A9-41C9-955B-55320F0C7D77">// example 1 |
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var criteria = new Object(); |
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criteria.Type = 'FileInfo'; |
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// example 2 - nested object |
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var filter = new Object(); |
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filter.FileType = 'Sound' |
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var criteria = new Object(); |
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criteria.Filter = filter; |
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</pre> |
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<p><strong>Object literal syntax:</strong></p> |
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<pre class="codeblock" id="GUID-91711FF3-169D-4D78-8FC8-A88D20147CB6">var criteria = { 'Type': 'FileInfo', 'Filter': { 'FileType': 'Sound' } };</pre>
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<p><strong>new() with array syntax:</strong></p> |
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<pre class="codeblock" id="GUID-73B06F7A-D0F1-4573-BBC4-0362BEA4556B">// example 1 |
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var criteria = new Object(); |
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criteria ['Type'] = 'FileInfo'; |
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// example 2 - nested object |
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var filter = new Object(); |
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filter['FileType'] = 'Sound' |
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var criteria = new Object(); |
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criteria ['Filter'] = filter; |
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</pre> |
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</div> |
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</div></div></div><div class="footer"><hr/><div class="copy">© Nokia 2009.</div></div></body></html> |