releasenotes.htm

symbian平台上多任务处理机制：多线程和Active

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<body lang=EN-US link=blue vlink=purple style='tab-interval:64.9pt'>

<div class=Section1>

<p class=MsoNormal>About S60 Platform: Thread And Active Objects Example</p>

<p class=MsoNormal>-----------------------------------------------------------------------------</p>

<p class=MsoNormal>The example demonstrates how to create an active scheduler
and how to use active </p>

<p class=MsoNormal>objects inside a new thread. Inside the mainthread (main
program) the framework</p>

<p class=MsoNormal>creates the active scheduler automatically, but inside a new
thread the active </p>

<p class=MsoNormal>scheduler must be created by the programmer. One active
object is a Bluetooth device </p>

<p class=MsoNormal>discoverer that searches Bluetooth devices in the vicinity
and displays them in </p>

<p class=MsoNormal>the listbox. </p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>The program</p>

<p class=MsoNormal>-----------</p>

<p class=MsoNormal>Searches Bluetooth devices and automatically refreshes the
&quot;found devices&quot; list.</p>

<p class=MsoNormal>Refreshing is done every 20 seconds by default.</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Prerequisites</p>

<p class=MsoNormal>------------</p>

<p class=MsoNormal>- Active objects</p>

<p class=MsoNormal>- Multitasking</p>

<p class=MsoNormal>- Symbian OS key concepts</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Running the example</p>

<p class=MsoNormal>------------------------</p>

<p class=MsoNormal>1. Select &quot;Start discovering devices&quot; from the
options menu.</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>After that every
found new Bluetooth device is displayed in the listbox.</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>All Bluetooth
devices are searched again after the refresh time has passed, cache</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>is not used.
Refresh loop (active object) runs continuously.</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>2. (optional)</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>Set a new refresh
time by selecting &quot;Set refresh time&quot; from the options menu.</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>(Note! The refresh
time cannot be less than 5 seconds due to slow Bluetooth</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>device discovery). The
refresh time is 20 seconds if not set.</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>3. Select a Bluetooth device using arrow UP or arrow DOWN. Press
the select key. An information</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>牋 </span>note displays the
Bluetooth address of the selected device as hexadecimal.</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>4. In order to stop searching, press Exit.</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Installation instructions</p>

<p class=MsoNormal>-----------------------</p>

<p class=MsoNormal>-----------------------</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>MOBILE DEVICE</p>

<p class=MsoNormal>------------------</p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>S60 1st/2nd Edition:</p>

<p class=MsoNormal><span style='mso-spacerun:yes'>