1 page.title=Lights 2 pdk.version=1.0 3 doc.type=porting 4 @jd:body 5 6 <div id="qv-wrapper"> 7 <div id="qv"> 8 <h2>In this document</h2> 9 <a name="toc"/> 10 <ul> 11 <li><a href="#androidLightsBuildingDriver">Building a Lights Library</a></li> 12 <li><a href="#androidLightsInterface">Interface</a></li> 13 </ul> 14 </div> 15 </div> 16 17 <p>Android defines a user space C abstraction interface for LED hardware. The interface header is defined in 18 <code>hardware/libhardware/include/hardware/lights.h</code>. 19 In order to integrate LEDs with Android you need to build a shared library that implements this interface. 20 21 The types of logical lights currently supported by Android include: 22 <ul> 23 <li>Backlight</li> 24 <li>Keyboard</li> 25 <li>Buttons</li> 26 <li>Battery</li> 27 <li>Notifications</li> 28 <li>Attention</li> 29 </ul> 30 </p> 31 32 <a name="androidLightsBuildingDriver"></a><h3>Building a Lights Library</h3> 33 <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 34 <code>liblights.so</code> so that it will get loaded from <code>/system/lib</code> at runtime. 35 </p 36 37 38 <a name="androidLightsInterface"></a><h3>Interface</h3> 39 40 41 42 <p><span class="lh3"><a name="androidDoxygenNote"></a></span> 43 44 <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> 45 46 47 <iframe onLoad="resizeDoxFrameHeight();" src="lights_8h.html" scrolling="no" scroll="no" id="doxygen" marginwidth="0" marginheight="0" 48 frameborder="0" style="width:100%;"></iframe> 49
