pdk/docs/guide/lights.jd

page.title=Lights
pdk.version=1.0
@jd:body
 
<a name="toc"/> 
<div style="padding:10px"> 
<a href="#androidLightsIntroduction">Introduction</a><br/> 
<a href="#androidLightsBuildingDriver">Building a Lights Library</a><br/> 
<a href="#androidLightsInterface">Interface</a><br/></div></font></div> 
 
<a name="androidLightsIntroduction"></a><h2>Introduction</h2> 
 
<p>Android defines a user space C abstraction interface for LED hardware. The interface header is defined in 
<code>hardware/libhardware/include/hardware/lights.h</code>.
In order to integrate LEDs with Android you need to build a shared library that implements this interface. 

The types of logical lights currently supported by Android include:
<ul>
<li>Backlight</li>
<li>Keyboard</li>
<li>Buttons</li>
<li>Battery</li>
<li>Notifications</li>
<li>Attention</li>
</ul>
</p> 
 
<a name="androidLightsBuildingDriver"></a><h2>Building a Lights Library</h2>
<p> To implement a Lights driver, create a shared library that implements the interface defined in <code>lights.h</code>. You must name your shared library 
<code>liblights.so</code> so that it will get loaded from <code>/system/lib</code> at runtime. 
</p

 
<a name="androidLightsInterface"></a><h2>Interface</h2> 
 
 
 
<p><span class="lh2"><a name="androidDoxygenNote"></a></span> 
 
<p class="note"><strong>Note</strong>: This document relies on some Doxygen-generated content that appears in an iFrame below. To return to the Doxygen default content for this page, <a href="lights.html">click here</a>.</p> 
 
 
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