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90 <h1>Android Platform Development Kit</h1>
91 <ul class="gc-topnav-tabs">
92 <li id="sdk_link"> <a href="http://code.google.com/android/index.html" title="Android Software Development Kit">SDK</a> </li>
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173
174
175<a name="androidGpsTitle"></a><h1>GPS</h1>
176
177
178
179<a name="toc"/>
180<div style="padding:10px">
181<a href="#androidGpsIntroduction">Introduction</a><br/>
182<a href="#androidGPSBuildingDriver">Building a GPS Library</a><br/>
183<a href="#androidGPSInterface">Interface</a><br/></div></font></div>
184
185<a name="androidGpsIntroduction"></a><h2>Introduction</h2>
186
187<p>Android defines a user space C abstraction interface for GPS hardware. The interface header is defined in <code>include/hardware/gps.h</code>. In order to integate GPS with Android, you need to build a shared library that implements this interface. </p>
188
189
190<a name="androidGPSBuildingDriver"></a><h2>Building a GPS Library</h2>
191
192<p>To implement a GPS driver, create a shared library that implements the interface defined in <code>gps.h</code>. You must name your shared library <code>libgps.so</code> so that it will get loaded from <code>/system/lib</code> at runtime. Place GPS sources and Android.mk in <code>partner/acme/chipset_or_board/gps/</code> (where "acme" is your product name and "chipset_or_board" is your hardware target).</p>
193
194<p>The following stub <code>Android.mk</code> file ensures that <code>libgps</code> compiles and links to the appropriate libraries:</p>
195
196<pre class="prettify">
197LOCAL_PATH := $(call my-dir)
198include $(CLEAR_VARS)
199
200LOCAL_MODULE := libgps
201
202LOCAL_STATIC_LIBRARIES:= \
203# include any static library dependencies
204
205LOCAL_SHARED_LIBRARIES := \
206# include any shared library dependencies
207
208LOCAL_SRC_FILES += \
209# include your source files. eg. MyGpsLibrary.cpp
210
211LOCAL_CFLAGS += \
212# include any needed compile flags
213
214LOCAL_C_INCLUDES:= \
215# include any needed local header files
216
217include $(BUILD_SHARED_LIBRARY)
218</pre>
219
220
221<a name="androidGPSInterface"></a><h2>Interface</h2>
222
223
224
225<p><span class="lh2"><a name="androidDoxygenNote"></a></span>
226
227<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="gps.html">click here</a>.</p>
228
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