c8f0e67a67
- Added Makefile stub into sensors.jd as a starting point - Small cleanup to build_new_device to reference the PRODUCT_* parameters - Fixed URL in the README for app engine testing Conflicts: pdk/README pdk/docs/guide/build_new_device.jd pdk/docs/guide/build_system.jd pdk/docs/guide/sensors.jd
67 lines
2.0 KiB
Plaintext
Executable File
67 lines
2.0 KiB
Plaintext
Executable File
page.title=Sensors
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pdk.version=1.0
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@jd:body
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<div id="qv-wrapper">
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<div id="qv">
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<h2>In this document</h2>
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<a name="toc"/>
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<ul>
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<li><a href="#androidSensorsInterface">Interface</a></li>
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</ul>
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</div>
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</div>
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<p>Android defines a user space C abstraction interface for sensor hardware. The interface header is defined in
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<code>hardware/libhardware/include/hardware/sensors.h</code>.
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In order to integrate sensors with Android you need to build a shared library that implements this interface.
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The types of sensors currently supported by Android include:
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<ul>
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<li>Accelerometer</li>
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<li>Magnetic Field</li>
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<li>Orientation</li>
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<li>Gyroscope</li>
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<li>Light</li>
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<li>Pressure</li>
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<li>Temperature</li>
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<li>Proximity</li>
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</ul>
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</p>
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<a name="androidSensorBuildingDriver"></a><h3>Building a Sensor Library</h3>
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<p> To implement a Sensors driver, create a shared library that implements the interface defined in <code>sensors.h</code>. You must name your shared library
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<code>libsensors.so</code> so that it will get loaded from <code>/system/lib</code> at runtime.
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</p>
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<p> The following stub file, <code>Android.mk</code>, ensures that <code>libsensors</code> compiles and links to the appropriate libraries:</p>
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<pre>
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LOCAL_PATH := $(call my-dir)
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include $(CLEAR_VARS)
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LOCAL_MODULE := sensors
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LOCAL_PRELINK_MODULE := false
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LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
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LOCAL_SHARED_LIBRARIES := liblog
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# include any shared library dependencies
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LOCAL_SRC_FILES := sensors.c
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include $(BUILD_SHARED_LIBRARY)
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</pre>
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<a name="androidSensorsInterface"></a><h3>Interface</h3>
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<p><span class="lh3"><a name="androidDoxygenNote"></a></span>
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<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="sensors.html">click here</a>.</p>
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<iframe onLoad="resizeDoxFrameHeight();" src="sensors_8h.html" scrolling="no" scroll="no" id="doxygen" marginwidth="0" marginheight="0"
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frameborder="0" style="width:100%;"></iframe>
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