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plugins/org.symbian.tools.wrttools.doc.WebDeveloper/html/GUID-697AFF1F-24C7-43BD-A072-8352B3BE973C.html
author Eugene Ostroukhov <eugeneo@symbian.org>
Thu, 02 Sep 2010 10:50:38 -0700
changeset 483 109da596fa9d
parent 470 d4809db37847
permissions -rw-r--r--
Fixed relevant FindBug messages


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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="IAppManager.LaunchApp()"/><meta name="DC.Relation" scheme="URI" content="GUID-41FAD7DA-0DB7-48E7-BD60-58D6BFD785DA"/><meta name="DC.Relation" scheme="URI" content="GUID-4A2480A8-4D79-4F5D-9614-74A8934B8952"/><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-2D651505-F68C-4053-B565-9FF826C5B897"/><meta name="DC.Format" content="XHTML"/><meta name="DC.Identifier" content="GUID-697AFF1F-24C7-43BD-A072-8352B3BE973C"/><title>IAppManager.LaunchApp() </title><script type="text/javascript">
      function initPage() {}
    </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-697AFF1F-24C7-43BD-A072-8352B3BE973C"><span>IAppManager.</span>LaunchApp()</h1><div>
<p><strong>Description:</strong></p>
<p>The <code>LaunchApp</code> method launches an application based
on a unique ID for the application (UID). It also provides a way to open a
specific document (by specifying a document path), even if it is not the default
file type for the application being launched.<span> For
example, you can specify a path to a document with a <code>.txt</code> extension
to open in WordPad, even though Notepad is the default application for .txt
files.</span></p>
<p>The application can be launched as chained (embedded) or stand-alone.
For more information about embedded and stand-alone applications, see section <a href="GUID-E092BF10-C076-4476-9E80-87919940201B.html#GUID-E092BF10-C076-4476-9E80-87919940201B">Accessing and launching installed applications</a>.</p>
<p>This method can be called both synchronously and asynchronously.</p>
<p><strong>Syntax:</strong></p>
<p>For synchronous calls:</p>
<pre class="codeblock" id="GUID-21A6DD8A-D123-452E-9CD3-38987BE08CB2">result = so.IAppManager.LaunchApp(criteria);</pre>

<p>For asynchronous calls:</p>
<pre class="codeblock" id="GUID-07FA9E54-0E1E-4F9C-989D-2A9CF8E8C08F">result = so.IAppManager.LaunchApp(criteria, callback);</pre>

<p><strong>Arguments:</strong></p>
<ul>
<li><p><code>criteria</code>:</p>

<p>This is an object that specifies which application to launch. For more
information about the object properties and how to define them, see section <a href="GUID-7DD6AB91-0582-4A46-9E19-2F12DC2FE674.html#GUID-7DD6AB91-0582-4A46-9E19-2F12DC2FE674">Criteria for launching an application</a>.</p>

</li>
<li><p><code>callback</code>:</p>

<p>The <code>callback</code> argument is the name of the method
that is executed when an asynchronous <code>LaunchApp</code> call
has status information to return. You must define this method separately.
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
define the <code>callback</code> method.</p>
<p>This argument is used only with an asynchronous <code>LaunchApp</code> call.</p>

</li>
</ul>
<p><strong>Return value:</strong></p>
<p>If synchronous, the <code>LaunchApp</code> method returns an
object that contains an error code and an error message.</p>
<div class="tablenoborder"><a name="GUID-8691DA0F-9EF0-443E-8AF5-F59A9AAD4E22"><!----></a><table cellpadding="4" cellspacing="0" summary="" id="GUID-8691DA0F-9EF0-443E-8AF5-F59A9AAD4E22" frame="border" border="1" rules="all"><caption><strong>Table: </strong>Return value
properties for a synchronous LaunchApp</caption>
<thead align="left">
<tr class="title "><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e18274">
<p>Property</p>
</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e18279">
<p>Description</p>
</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e18284">
<p>Value</p>
</th></tr>
</thead>
<tbody>
<tr class="">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18274 ">
<p><code>result.ErrorCode</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18279 ">
<p>This is a number that specifies a predefined error code.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18284 ">
<p>See <a href="GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4.html#GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4">Service API error codes</a>.</p>
</td>
</tr>
<tr class="bg ">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18274 ">
<p><code>result.ErrorMessage</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18279 ">
<p>This is a text string that describes the error.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18284 ">
<p>See <a href="GUID-50795090-A429-41CF-8CAA-EA2004D2643A.html#GUID-50795090-A429-41CF-8CAA-EA2004D2643A">AppManager Service API error messages</a>.</p>
</td>
</tr>
</tbody>
</table></div>
<p>If asynchronous, the method returns an object that contains a transaction
ID for the <a href="GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608.html#GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608"><code>callback</code></a> instance,
an error code, and an error message (see the following table). When the asynchronous
call has completed, <code>callback</code> returns an
object that contains an error code and an error message (see <a href="GUID-C7C3B541-8D28-4DC6-9003-ECF57F26C608.html#GUID-E43BC9EA-3EBE-4C7F-A57E-A1C33BB01CF4">Table: Callback return value</a>).</p>
<div class="note"><p><strong class="note_title">Note: </strong>If <a href="GUID-64CC3AB4-5444-474A-9470-818F423C5611.html#GUID-64CC3AB4-5444-474A-9470-818F423C5611"><code>Cancel</code></a> is
called on an ongoing asynchronous request, <code>LaunchApp</code> will
not return a notification when the launched application terminates.</p>
</div>
<div class="tablenoborder"><a name="GUID-7ED3652F-0708-4EE8-8ADA-CE759533676D"><!----></a><table cellpadding="4" cellspacing="0" summary="" id="GUID-7ED3652F-0708-4EE8-8ADA-CE759533676D" frame="border" border="1" rules="all"><caption><strong>Table: </strong>Return value
properties for an asynchronous LaunchApp</caption>
<thead align="left">
<tr class="title "><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e18384">
<p>Property</p>
</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e18389">
<p>Description</p>
</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e18394">
<p>Value</p>
</th></tr>
</thead>
<tbody>
<tr class="">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18384 ">
<p><code>result.TransactionID</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18389 ">
<p>This is a number used as an identification to match transactions started
with the asynchronous <code>LaunchApp</code> call to one or more calls
it generates to <code>callback</code>.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18394 ">&nbsp;</td>
</tr>
<tr class="bg ">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18384 ">
<p><code>result.ErrorCode</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18389 ">
<p>This is a number that specifies a predefined error code.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18394 ">
<p>See <a href="GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4.html#GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4">Service API error codes</a>.</p>
</td>
</tr>
<tr class="">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18384 ">
<p><code>result.ErrorMessage</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18389 ">
<p>This is a text string that describes the error.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e18394 ">
<p>See <a href="GUID-50795090-A429-41CF-8CAA-EA2004D2643A.html#GUID-50795090-A429-41CF-8CAA-EA2004D2643A">AppManager Service API error messages</a>.</p>
</td>
</tr>
</tbody>
</table></div>
<p><strong>Remarks:</strong></p>
<p>Use the <a href="GUID-4A2480A8-4D79-4F5D-9614-74A8934B8952.html#GUID-4A2480A8-4D79-4F5D-9614-74A8934B8952"><code>GetList</code></a> method
to retrieve the unique ID of the application to launch.</p>
<p><strong>Example code:</strong></p>
<p/>
<p>For the complete source of a sample widget
that demonstrates how to use this Service API, see <a href="GUID-2D47E7D9-199D-4D59-BD6A-592FA9F8B16A.html#GUID-2D47E7D9-199D-4D59-BD6A-592FA9F8B16A">the
full example</a>.</p>




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