1 page.title=Sensors 2 @jd:body 3 4 <div id="qv-wrapper"> 5 <div id="qv"> 6 <h2>Topics</h2> 7 <ol> 8 <li><a href="{@docRoot}guide/topics/sensors/sensors_overview.html">Sensors Overview</a></li> 9 <li><a href="{@docRoot}guide/topics/sensors/sensors_motion.html">Motion Sensors</a></li> 10 <li><a href="{@docRoot}guide/topics/sensors/sensors_position.html">Position 11 Sensors</a></li> 12 <li><a href="{@docRoot}guide/topics/sensors/sensors_environment.html">Environment 13 Sensors</a></li> 14 </ol> 15 <h2>Key classes and interfaces</h2> 16 <ol> 17 <li>{@link android.hardware.Sensor}</li> 18 <li>{@link android.hardware.SensorEvent}</li> 19 <li>{@link android.hardware.SensorManager}</li> 20 <li>{@link android.hardware.SensorEventListener}</li> 21 </ol> 22 <h2>Related samples</h2> 23 <ol> 24 <li><a href="{@docRoot}resources/samples/AccelerometerPlay/index.html">Accelerometer 25 Play</a></li> 26 <li><a 27 href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/os/RotationVectorDemo.html"> 28 API Demos (OS - RotationVectorDemo)</a></li> 29 <li><a 30 href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/os/Sensors.html">API Demos 31 (OS - Sensors)</a></li> 32 </ol> 33 </div> 34 </div> 35 36 <p>Most Android-powered devices have built-in sensors that measure motion, orientation, 37 and various environmental conditions. These sensors are capable of providing raw data with high 38 precision and accuracy, and are useful if you want to monitor three-dimensional device movement or 39 positioning, or you want to monitor changes in the ambient environment near a device. For example, a 40 game might track readings from a device's gravity sensor to infer complex user gestures 41 and motions, such as tilt, shake, rotation, or swing. Likewise, a weather application might use a 42 device's temperature sensor and humidity sensor to calculate and report the dewpoint, or a travel 43 application might use the geomagnetic field sensor and accelerometer to report a compass 44 bearing.</p> 45 46 <p>The Android platform supports three broad categories of sensors:</p> 47 48 <ul> 49 <li>Motion sensors 50 <p>These sensors measure acceleration forces and rotational forces along three axes. This 51 category includes accelerometers, gravity sensors, gyroscopes, and rotational vector 52 sensors.</p> 53 </li> 54 <li>Environmental sensors 55 <p>These sensors measure various environmental parameters, such as ambient air temperature 56 and pressure, illumination, and humidity. This category includes barometers, photometers, and 57 thermometers.</p> 58 </li> 59 <li>Position sensors 60 <p>These sensors measure the physical position of a device. This category includes 61 orientation sensors and magnetometers.</p> 62 </li> 63 </ul> 64 65 <p>To access these sensors, you can use the Android sensor framework. The sensor framework provides 66 several classes and interfaces that help you perform a wide variety of sensor-related tasks. To 67 learn more about the framework and the sensors that are supported on the Android system, read the 68 following documents:</p> 69 70 <dl> 71 <dt><strong><a href="{@docRoot}guide/topics/sensors/sensors_overview.html">Sensors 72 Overview</a></strong></dt> 73 <dd>Learn how to list the sensors that are on a device, set up sensor event listeners, and 74 acquire sensor data. Also learn best practices for accessing and using sensors.</dd> 75 <dt><strong><a href="{@docRoot}guide/topics/sensors/sensors_motion.html">Motion 76 Sensors</a></strong></dt> 77 <dd>Learn how to use the sensors that provide acceleration data, such as the accelerometer, 78 gravity sensor, and linear acceleration sensor. Also learn how to use the sensors that 79 provide rotational data, such as gyroscopes and rotational vector sensors.</dd> 80 <dt><strong><a href="{@docRoot}guide/topics/sensors/sensors_position.html">Position 81 Sensors</a></strong></dt> 82 <dd>Learn how to use the sensors that provide orientation and compass data, such as the 83 orientation sensor and the geomagnetic field sensor.</dd> 84 <dt><strong><a href="{@docRoot}guide/topics/sensors/sensors_environment.html">Environment 85 Sensors</a></strong></dt> 86 <dd>Learn how to use the sensors that provide environmental data, such as the light, 87 humidity, pressure, temperature, and proximity sensors.</dd> 88 </dl> 89
