SensorManager Class
Definition
Important
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SensorManager lets you access the device's android.hardware.Sensor
sensors.
[Android.Runtime.Register("android/hardware/SensorManager", DoNotGenerateAcw=true)]
public abstract class SensorManager : Java.Lang.Object[<Android.Runtime.Register("android/hardware/SensorManager", DoNotGenerateAcw=true)>]
type SensorManager = class
inherit Object- Inheritance
- Attributes
Remarks
SensorManager lets you access the device's android.hardware.Sensor sensors.
Always make sure to disable sensors you don't need, especially when your activity is paused. Failing to do so can drain the battery in just a few hours. Note that the system will not disable sensors automatically when the screen turns off.
<p class="note"> Note: Don't use this mechanism with a Trigger Sensor, have a look at TriggerEventListener. Sensor#TYPE_SIGNIFICANT_MOTION is an example of a trigger sensor. </p>
In order to access sensor data at high sampling rates (i.e. greater than 200 Hz for SensorEventListener and greater than SensorDirectChannel#RATE_NORMAL for SensorDirectChannel), apps must declare the android.Manifest.permission#HIGH_SAMPLING_RATE_SENSORS permission in their AndroidManifest.xml file.
public class SensorActivity extends Activity implements SensorEventListener {
private final SensorManager mSensorManager;
private final Sensor mAccelerometer;
public SensorActivity() {
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
}
protected void onResume() {
super.onResume();
mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
protected void onPause() {
super.onPause();
mSensorManager.unregisterListener(this);
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
}
}
Java documentation for android.hardware.SensorManager.
Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Constructors
| SensorManager(IntPtr, JniHandleOwnership) |
A constructor used when creating managed representations of JNI objects; called by the runtime. |
Fields
| GravityDeathStarI |
Gravity (estimate) on the first Death Star in Empire units (m/s^2) |
| GravityEarth |
Earth's gravity in SI units (m/s^2) |
| GravityJupiter |
Jupiter's gravity in SI units (m/s^2) |
| GravityMars |
Mars' gravity in SI units (m/s^2) |
| GravityMercury |
Mercury's gravity in SI units (m/s^2) |
| GravityMoon |
The Moon's gravity in SI units (m/s^2) |
| GravityNeptune |
Neptune's gravity in SI units (m/s^2) |
| GravityPluto |
Pluto's gravity in SI units (m/s^2) |
| GravitySaturn |
Saturn's gravity in SI units (m/s^2) |
| GravitySun |
Sun's gravity in SI units (m/s^2) |
| GravityTheIsland |
Gravity on the island |
| GravityUranus |
Uranus' gravity in SI units (m/s^2) |
| GravityVenus |
Venus' gravity in SI units (m/s^2) |
| LightCloudy |
luminance under a cloudy sky in lux |
| LightFullmoon |
luminance at night with full moon in lux |
| LightNoMoon |
luminance at night with no moon in lux |
| LightOvercast |
luminance under an overcast sky in lux |
| LightShade |
luminance in shade in lux |
| LightSunlight |
luminance of sunlight in lux |
| LightSunlightMax |
Maximum luminance of sunlight in lux |
| LightSunrise |
luminance at sunrise in lux |
| MagneticFieldEarthMax |
Maximum magnetic field on Earth's surface |
| MagneticFieldEarthMin |
Minimum magnetic field on Earth's surface |
| PressureStandardAtmosphere |
Standard atmosphere, or average sea-level pressure in hPa (millibar) |
| StandardGravity |
Standard gravity (g) on Earth. |
Properties
| Class |
Returns the runtime class of this |
| Handle |
The handle to the underlying Android instance. (Inherited from Object) |
| IsDynamicSensorDiscoverySupported |
Tell if dynamic sensor discovery feature is supported by system. |
| JniIdentityHashCode | (Inherited from Object) |
| JniPeerMembers | |
| PeerReference | (Inherited from Object) |
| Sensors |
Obsolete.
This member is deprecated. |
| ThresholdClass |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. |
| ThresholdType |
This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. |
Methods
| CancelTriggerSensor(TriggerEventListener, Sensor) |
Cancels receiving trigger events for a trigger sensor. |
| Clone() |
Creates and returns a copy of this object. (Inherited from Object) |
| CreateDirectChannel(HardwareBuffer) |
Create a sensor direct channel backed by shared memory wrapped in HardwareBuffer object. |
| CreateDirectChannel(MemoryFile) |
Create a sensor direct channel backed by shared memory wrapped in MemoryFile object. |
| Dispose() | (Inherited from Object) |
| Dispose(Boolean) | (Inherited from Object) |
| Equals(Object) |
Indicates whether some other object is "equal to" this one. (Inherited from Object) |
| Flush(ISensorEventListener) |
Flushes the FIFO of all the sensors registered for this listener. |
| FromContext(Context) | |
| GetAltitude(Single, Single) |
Computes the Altitude in meters from the atmospheric pressure and the pressure at sea level. |
| GetAngleChange(Single[], Single[], Single[]) |
Helper function to compute the angle change between two rotation matrices. |
| GetDefaultSensor(SensorType, Boolean) |
Return a Sensor with the given type and wakeUp properties. |
| GetDefaultSensor(SensorType) |
Use this method to get the default sensor for a given type. |
| GetDynamicSensorList(SensorType) |
Use this method to get a list of available dynamic sensors of a certain type. |
| GetHashCode() |
Returns a hash code value for the object. (Inherited from Object) |
| GetInclination(Single[]) |
Computes the geomagnetic inclination angle in radians from the
inclination matrix <b>I</b> returned by |
| GetOrientation(Single[], Single[]) |
Computes the device's orientation based on the rotation matrix. |
| GetQuaternionFromVector(Single[], Single[]) |
Helper function to convert a rotation vector to a normalized quaternion. |
| GetRotationMatrix(Single[], Single[], Single[], Single[]) |
Computes the inclination matrix <b>I</b> as well as the rotation matrix <b>R</b> transforming a vector from the device coordinate system to the world's coordinate system which is defined as a direct orthonormal basis, where: |
| GetRotationMatrixFromVector(Single[], Single[]) |
Helper function to convert a rotation vector to a rotation matrix. |
| GetSensorList(SensorType) |
Use this method to get the list of available sensors of a certain type. |
| JavaFinalize() |
Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. (Inherited from Object) |
| Notify() |
Wakes up a single thread that is waiting on this object's monitor. (Inherited from Object) |
| NotifyAll() |
Wakes up all threads that are waiting on this object's monitor. (Inherited from Object) |
| RegisterDynamicSensorCallback(SensorManager+DynamicSensorCallback, Handler) |
Add a |
| RegisterDynamicSensorCallback(SensorManager+DynamicSensorCallback) |
Add a |
| RegisterListener(ISensorEventListener, Sensor, SensorDelay, Handler) |
Registers a |
| RegisterListener(ISensorEventListener, Sensor, SensorDelay, Int32, Handler) |
Registers a |
| RegisterListener(ISensorEventListener, Sensor, SensorDelay, Int32) |
Registers a |
| RegisterListener(ISensorEventListener, Sensor, SensorDelay) |
Registers a |
| RegisterListener(ISensorListener, Int32, SensorDelay) |
Obsolete.
Registers a SensorListener for given sensors. |
| RegisterListener(ISensorListener, Int32) |
Obsolete.
Registers a listener for given sensors. |
| RemapCoordinateSystem(Single[], Axis, Axis, Single[]) |
Rotates the supplied rotation matrix so it is expressed in a different coordinate system. |
| RequestTriggerSensor(TriggerEventListener, Sensor) |
Requests receiving trigger events for a trigger sensor. |
| SetHandle(IntPtr, JniHandleOwnership) |
Sets the Handle property. (Inherited from Object) |
| ToArray<T>() | (Inherited from Object) |
| ToString() |
Returns a string representation of the object. (Inherited from Object) |
| UnregisterDynamicSensorCallback(SensorManager+DynamicSensorCallback) |
Remove a |
| UnregisterFromRuntime() | (Inherited from Object) |
| UnregisterListener(ISensorEventListener, Sensor) |
Unregisters a listener for the sensors with which it is registered. |
| UnregisterListener(ISensorEventListener) |
Unregisters a listener for all sensors. |
| UnregisterListener(ISensorListener, Int32) |
Obsolete.
Unregisters a listener for the sensors with which it is registered. |
| UnregisterListener(ISensorListener) |
Obsolete.
Unregisters a listener for all sensors. |
| Wait() |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>. (Inherited from Object) |
| Wait(Int64, Int32) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
| Wait(Int64) |
Causes the current thread to wait until it is awakened, typically by being <em>notified</em> or <em>interrupted</em>, or until a certain amount of real time has elapsed. (Inherited from Object) |
Explicit Interface Implementations
| IJavaPeerable.Disposed() | (Inherited from Object) |
| IJavaPeerable.DisposeUnlessReferenced() | (Inherited from Object) |
| IJavaPeerable.Finalized() | (Inherited from Object) |
| IJavaPeerable.JniManagedPeerState | (Inherited from Object) |
| IJavaPeerable.SetJniIdentityHashCode(Int32) | (Inherited from Object) |
| IJavaPeerable.SetJniManagedPeerState(JniManagedPeerStates) | (Inherited from Object) |
| IJavaPeerable.SetPeerReference(JniObjectReference) | (Inherited from Object) |
Extension Methods
| JavaCast<TResult>(IJavaObject) |
Performs an Android runtime-checked type conversion. |
| JavaCast<TResult>(IJavaObject) | |
| GetJniTypeName(IJavaPeerable) | |