public
abstract
class
OrientationListener
extends Object
implements
SensorListener
| java.lang.Object | |
| ↳ | android.view.OrientationListener |
This class was deprecated
in API level 3.
use OrientationEventListener instead.
This class internally uses the OrientationEventListener.
Helper class for receiving notifications from the SensorManager when the orientation of the device has changed.
Constants | |
|---|---|
int |
ORIENTATION_UNKNOWN
Returned from onOrientationChanged when the device orientation cannot be determined (typically when the device is in a close to flat position). |
Public constructors | |
|---|---|
OrientationListener(Context context)
Creates a new OrientationListener. |
|
OrientationListener(Context context, int rate)
Creates a new OrientationListener. |
|
Public methods | |
|---|---|
void
|
disable()
Disables the OrientationListener. |
void
|
enable()
Enables the OrientationListener so it will monitor the sensor and call
|
void
|
onAccuracyChanged(int sensor, int accuracy)
Called when the accuracy of a sensor has changed. |
abstract
void
|
onOrientationChanged(int orientation)
Look at |
void
|
onSensorChanged(int sensor, float[] values)
Called when sensor values have changed. |
Inherited methods | |
|---|---|
 From
class
java.lang.Object
| |
From
interface
android.hardware.SensorListener
| |
int ORIENTATION_UNKNOWN
Returned from onOrientationChanged when the device orientation cannot be determined (typically when the device is in a close to flat position).
See also:
Constant Value: -1 (0xffffffff)
OrientationListener (Context context)
Creates a new OrientationListener.
| Parameters | |
|---|---|
context |
Context:
for the OrientationListener.
|
OrientationListener (Context context, int rate)
Creates a new OrientationListener.
| Parameters | |
|---|---|
context |
Context:
for the OrientationListener. |
rate |
int:
at which sensor events are processed (see also
SensorManager). Use the default
value of SENSOR_DELAY_NORMAL for simple screen orientation change detection.
|
void enable ()
Enables the OrientationListener so it will monitor the sensor and call
onOrientationChanged(int) when the device orientation changes.
Developers
void onAccuracyChanged (int sensor,
int accuracy)
Called when the accuracy of a sensor has changed.
See SensorManager
for details.
| Parameters | |
|---|---|
sensor |
int:
The ID of the sensor being monitored |
accuracy |
int:
The new accuracy of this sensor.
|
void onOrientationChanged (int orientation)
Look at onOrientationChanged(int)
for method description and usage
| Parameters | |
|---|---|
orientation |
int:
The new orientation of the device. |
See also:
void onSensorChanged (int sensor,
float[] values)
Called when sensor values have changed.
The length and contents of the values array vary
depending on which sensor is being monitored.
See SensorManager
for details on possible sensor types.
Definition of the coordinate system used below.
The X axis refers to the screen's horizontal axis (the small edge in portrait mode, the long edge in landscape mode) and points to the right.
The Y axis refers to the screen's vertical axis and points towards the top of the screen (the origin is in the lower-left corner).
The Z axis points toward the sky when the device is lying on its back on a table.
IMPORTANT NOTE: The axis are swapped when the device's screen orientation changes. To access the unswapped values, use indices 3, 4 and 5 in values[].
SENSOR_ORIENTATION,
SENSOR_ORIENTATION_RAW:
All values are angles in degrees.
values[0]: Azimuth, rotation around the Z axis (0<=azimuth<360). 0 = North, 90 = East, 180 = South, 270 = West
values[1]: Pitch, rotation around X axis (-180<=pitch<=180), with positive values when the z-axis moves toward the y-axis.
values[2]: Roll, rotation around Y axis (-90<=roll<=90), with positive values when the z-axis moves toward the x-axis.
Note that this definition of yaw, pitch and roll is different from the traditional definition used in aviation where the X axis is along the long side of the plane (tail to nose).
All values are in SI units (m/s^2) and measure contact forces.
values[0]: force applied by the device on the x-axis
values[1]: force applied by the device on the y-axis
values[2]: force applied by the device on the z-axis
Examples:
-STANDARD_GRAVITY,
which correspond to the force the device applies on the table in reaction
to gravity.All values are in micro-Tesla (uT) and measure the ambient magnetic field in the X, Y and -Z axis.
Note: the magnetic field's Z axis is inverted.
| Parameters | |
|---|---|
sensor |
int:
The ID of the sensor being monitored |
values |
float:
The new values for the sensor.
|