public
final
class
InputDevice
extends Object
implements
Parcelable
java.lang.Object | |
↳ | android.view.InputDevice |
Describes the capabilities of a particular input device.
Each input device may support multiple classes of input. For example, a multi-function keyboard may compose the capabilities of a standard keyboard together with a track pad mouse or other pointing device.
Some input devices present multiple distinguishable sources of input. Applications can query the framework about the characteristics of each distinct source.
As a further wrinkle, different kinds of input sources uses different coordinate systems to describe motion events. Refer to the comments on the input source constants for the appropriate interpretation.
Nested classes | |
---|---|
class |
InputDevice.MotionRange
Provides information about the range of values for a particular |
Constants | |
---|---|
int |
KEYBOARD_TYPE_ALPHABETIC
The keyboard supports a complement of alphabetic keys. |
int |
KEYBOARD_TYPE_NONE
There is no keyboard. |
int |
KEYBOARD_TYPE_NON_ALPHABETIC
The keyboard is not fully alphabetic. |
int |
MOTION_RANGE_ORIENTATION
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_PRESSURE
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_SIZE
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_TOOL_MAJOR
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_TOOL_MINOR
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_TOUCH_MAJOR
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_TOUCH_MINOR
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_X
This constant was deprecated
in API level 12.
Use |
int |
MOTION_RANGE_Y
This constant was deprecated
in API level 12.
Use |
int |
SOURCE_ANY
A special input source constant that is used when filtering input devices to match devices that provide any type of input source. |
int |
SOURCE_BLUETOOTH_STYLUS
The input device is a Bluetooth stylus. |
int |
SOURCE_CLASS_BUTTON
The input source has buttons or keys. |
int |
SOURCE_CLASS_JOYSTICK
The input source is a joystick. |
int |
SOURCE_CLASS_MASK
A mask for input source classes. |
int |
SOURCE_CLASS_NONE
The input source has no class. |
int |
SOURCE_CLASS_POINTER
The input source is a pointing device associated with a display. |
int |
SOURCE_CLASS_POSITION
The input source is an absolute positioning device not associated with a display
(unlike |
int |
SOURCE_CLASS_TRACKBALL
The input source is a trackball navigation device. |
int |
SOURCE_DPAD
The input source is a DPad. |
int |
SOURCE_GAMEPAD
The input source is a game pad. |
int |
SOURCE_HDMI
The input source is a device connected through HDMI-based bus. |
int |
SOURCE_JOYSTICK
The input source is a joystick. |
int |
SOURCE_KEYBOARD
The input source is a keyboard. |
int |
SOURCE_MOUSE
The input source is a mouse pointing device. |
int |
SOURCE_STYLUS
The input source is a stylus pointing device. |
int |
SOURCE_TOUCHPAD
The input source is a touch pad or digitizer tablet that is not
associated with a display (unlike |
int |
SOURCE_TOUCHSCREEN
The input source is a touch screen pointing device. |
int |
SOURCE_TOUCH_NAVIGATION
The input source is a touch device whose motions should be interpreted as navigation events. |
int |
SOURCE_TRACKBALL
The input source is a trackball. |
int |
SOURCE_UNKNOWN
The input source is unknown. |
Inherited constants |
---|
From
interface
android.os.Parcelable
|
Fields | |
---|---|
public
static
final
Creator<InputDevice> |
CREATOR
|
Public methods | |
---|---|
int
|
describeContents()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
int
|
getControllerNumber()
The controller number for a given input device. |
String
|
getDescriptor()
Gets the input device descriptor, which is a stable identifier for an input device. |
static
InputDevice
|
getDevice(int id)
Gets information about the input device with the specified id. |
static
int[]
|
getDeviceIds()
Gets the ids of all input devices in the system. |
int
|
getId()
Gets the input device id. |
KeyCharacterMap
|
getKeyCharacterMap()
Gets the key character map associated with this input device. |
int
|
getKeyboardType()
Gets the keyboard type. |
InputDevice.MotionRange
|
getMotionRange(int axis)
Gets information about the range of values for a particular |
InputDevice.MotionRange
|
getMotionRange(int axis, int source)
Gets information about the range of values for a particular |
List<InputDevice.MotionRange>
|
getMotionRanges()
Gets the ranges for all axes supported by the device. |
String
|
getName()
Gets the name of this input device. |
int
|
getProductId()
Gets the product id for the given device, if available. |
int
|
getSources()
Gets the input sources supported by this input device as a combined bitfield. |
int
|
getVendorId()
Gets the vendor id for the given device, if available. |
Vibrator
|
getVibrator()
Gets the vibrator service associated with the device, if there is one. |
boolean[]
|
hasKeys(int... keys)
Gets whether the device is capable of producing the list of keycodes. |
boolean
|
hasMicrophone()
Reports whether the device has a built-in microphone. |
boolean
|
isVirtual()
Returns true if the device is a virtual input device rather than a real one,
such as the virtual keyboard (see |
boolean
|
supportsSource(int source)
Determines whether the input device supports the given source or sources. |
String
|
toString()
Returns a string representation of the object. |
void
|
writeToParcel(Parcel out, int flags)
Flatten this object in to a Parcel. |
Inherited methods | |
---|---|
From
class
java.lang.Object
| |
From
interface
android.os.Parcelable
|
int KEYBOARD_TYPE_ALPHABETIC
The keyboard supports a complement of alphabetic keys.
Constant Value: 2 (0x00000002)
int KEYBOARD_TYPE_NONE
There is no keyboard.
Constant Value: 0 (0x00000000)
int KEYBOARD_TYPE_NON_ALPHABETIC
The keyboard is not fully alphabetic. It may be a numeric keypad or an assortment of buttons that are not mapped as alphabetic keys suitable for text input.
Constant Value: 1 (0x00000001)
int MOTION_RANGE_ORIENTATION
This constant was deprecated
in API level 12.
Use AXIS_ORIENTATION
instead.
Constant for retrieving the range of values for AXIS_ORIENTATION
.
See also:
Constant Value: 8 (0x00000008)
int MOTION_RANGE_PRESSURE
This constant was deprecated
in API level 12.
Use AXIS_PRESSURE
instead.
Constant for retrieving the range of values for AXIS_PRESSURE
.
See also:
Constant Value: 2 (0x00000002)
int MOTION_RANGE_SIZE
This constant was deprecated
in API level 12.
Use AXIS_SIZE
instead.
Constant for retrieving the range of values for AXIS_SIZE
.
See also:
Constant Value: 3 (0x00000003)
int MOTION_RANGE_TOOL_MAJOR
This constant was deprecated
in API level 12.
Use AXIS_TOOL_MAJOR
instead.
Constant for retrieving the range of values for AXIS_TOOL_MAJOR
.
See also:
Constant Value: 6 (0x00000006)
int MOTION_RANGE_TOOL_MINOR
This constant was deprecated
in API level 12.
Use AXIS_TOOL_MINOR
instead.
Constant for retrieving the range of values for AXIS_TOOL_MINOR
.
See also:
Constant Value: 7 (0x00000007)
int MOTION_RANGE_TOUCH_MAJOR
This constant was deprecated
in API level 12.
Use AXIS_TOUCH_MAJOR
instead.
Constant for retrieving the range of values for AXIS_TOUCH_MAJOR
.
See also:
Constant Value: 4 (0x00000004)
int MOTION_RANGE_TOUCH_MINOR
This constant was deprecated
in API level 12.
Use AXIS_TOUCH_MINOR
instead.
Constant for retrieving the range of values for AXIS_TOUCH_MINOR
.
See also:
Constant Value: 5 (0x00000005)
int MOTION_RANGE_X
This constant was deprecated
in API level 12.
Use AXIS_X
instead.
Constant for retrieving the range of values for AXIS_X
.
See also:
Constant Value: 0 (0x00000000)
int MOTION_RANGE_Y
This constant was deprecated
in API level 12.
Use AXIS_Y
instead.
Constant for retrieving the range of values for AXIS_Y
.
See also:
Constant Value: 1 (0x00000001)
int SOURCE_ANY
A special input source constant that is used when filtering input devices to match devices that provide any type of input source.
Constant Value: -256 (0xffffff00)
int SOURCE_BLUETOOTH_STYLUS
The input device is a Bluetooth stylus.
Note that this bit merely indicates that an input device is capable of
obtaining input from a Bluetooth stylus. To determine whether a given
touch event was produced by a stylus, examine the tool type returned by
getToolType(int)
for each individual pointer.
A single touch event may multiple pointers with different tool types,
such as an event that has one pointer with tool type
TOOL_TYPE_FINGER
and another pointer with tool type
TOOL_TYPE_STYLUS
. So it is important to examine
the tool type of each pointer, regardless of the source reported
by getSource()
.
A bluetooth stylus generally receives its pressure and button state information from the stylus itself, and derives the rest from another source. For example, a Bluetooth stylus used in conjunction with a touchscreen would derive its contact position and pointer size from the touchscreen and may not be any more accurate than other tools such as fingers.
See also:
Constant Value: 49154 (0x0000c002)
int SOURCE_CLASS_BUTTON
The input source has buttons or keys.
Examples: SOURCE_KEYBOARD
, SOURCE_DPAD
.
A KeyEvent
should be interpreted as a button or key press.
Use getKeyCharacterMap()
to query the device's button and key mappings.
Constant Value: 1 (0x00000001)
int SOURCE_CLASS_JOYSTICK
The input source is a joystick.
A MotionEvent
should be interpreted as absolute joystick movements.
Use getMotionRange(int)
to query the range of positions.
Constant Value: 16 (0x00000010)
int SOURCE_CLASS_MASK
A mask for input source classes. Each distinct input source constant has one or more input source class bits set to specify the desired interpretation for its input events.
Constant Value: 255 (0x000000ff)
int SOURCE_CLASS_NONE
The input source has no class. It is up to the application to determine how to handle the device based on the device type.
Constant Value: 0 (0x00000000)
int SOURCE_CLASS_POINTER
The input source is a pointing device associated with a display.
Examples: SOURCE_TOUCHSCREEN
, SOURCE_MOUSE
.
A MotionEvent
should be interpreted as absolute coordinates in
display units according to the View
hierarchy. Pointer down/up indicated when
the finger touches the display or when the selection button is pressed/released.
Use getMotionRange(int)
to query the range of the pointing device. Some devices permit
touches outside the display area so the effective range may be somewhat smaller or larger
than the actual display size.
Constant Value: 2 (0x00000002)
int SOURCE_CLASS_POSITION
The input source is an absolute positioning device not associated with a display
(unlike SOURCE_CLASS_POINTER
).
A MotionEvent
should be interpreted as absolute coordinates in
device-specific surface units.
Use getMotionRange(int)
to query the range of positions.
Constant Value: 8 (0x00000008)
int SOURCE_CLASS_TRACKBALL
The input source is a trackball navigation device.
Examples: SOURCE_TRACKBALL
.
A MotionEvent
should be interpreted as relative movements in device-specific
units used for navigation purposes. Pointer down/up indicates when the selection button
is pressed/released.
Use getMotionRange(int)
to query the range of motion.
Constant Value: 4 (0x00000004)
int SOURCE_DPAD
The input source is a DPad.
See also:
Constant Value: 513 (0x00000201)
int SOURCE_GAMEPAD
The input source is a game pad.
(It may also be a SOURCE_JOYSTICK
).
See also:
Constant Value: 1025 (0x00000401)
int SOURCE_HDMI
The input source is a device connected through HDMI-based bus. The key comes in through HDMI-CEC or MHL signal line, and is treated as if it were generated by a locally connected DPAD or keyboard.
Constant Value: 33554433 (0x02000001)
int SOURCE_JOYSTICK
The input source is a joystick.
(It may also be a SOURCE_GAMEPAD
).
See also:
Constant Value: 16777232 (0x01000010)
int SOURCE_KEYBOARD
The input source is a keyboard.
This source indicates pretty much anything that has buttons. Use
getKeyboardType()
to determine whether the keyboard has alphabetic keys
and can be used to enter text.
See also:
Constant Value: 257 (0x00000101)
int SOURCE_MOUSE
The input source is a mouse pointing device. This code is also used for other mouse-like pointing devices such as trackpads and trackpoints.
See also:
Constant Value: 8194 (0x00002002)
int SOURCE_STYLUS
The input source is a stylus pointing device.
Note that this bit merely indicates that an input device is capable of obtaining
input from a stylus. To determine whether a given touch event was produced
by a stylus, examine the tool type returned by getToolType(int)
for each individual pointer.
A single touch event may multiple pointers with different tool types,
such as an event that has one pointer with tool type
TOOL_TYPE_FINGER
and another pointer with tool type
TOOL_TYPE_STYLUS
. So it is important to examine
the tool type of each pointer, regardless of the source reported
by getSource()
.
See also:
Constant Value: 16386 (0x00004002)
int SOURCE_TOUCHPAD
The input source is a touch pad or digitizer tablet that is not
associated with a display (unlike SOURCE_TOUCHSCREEN
).
See also:
Constant Value: 1048584 (0x00100008)
int SOURCE_TOUCHSCREEN
The input source is a touch screen pointing device.
See also:
Constant Value: 4098 (0x00001002)
int SOURCE_TOUCH_NAVIGATION
The input source is a touch device whose motions should be interpreted as navigation events. For example, an upward swipe should be as an upward focus traversal in the same manner as pressing up on a D-Pad would be. Swipes to the left, right and down should be treated in a similar manner.
See also:
Constant Value: 2097152 (0x00200000)
int SOURCE_TRACKBALL
The input source is a trackball.
See also:
Constant Value: 65540 (0x00010004)
int SOURCE_UNKNOWN
The input source is unknown.
Constant Value: 0 (0x00000000)
int describeContents ()
Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation. For example, if the object will
include a file descriptor in the output of writeToParcel(Parcel, int)
,
the return value of this method must include the
CONTENTS_FILE_DESCRIPTOR
bit.
Returns | |
---|---|
int |
a bitmask indicating the set of special object types marshaled by this Parcelable object instance. |
int getControllerNumber ()
The controller number for a given input device.
Each gamepad or joystick is given a unique, positive controller number when initially
configured by the system. This number may change due to events such as device disconnects /
reconnects or user initiated reassignment. Any change in number will trigger an event that
can be observed by registering an InputManager.InputDeviceListener
.
All input devices which are not gamepads or joysticks will be assigned a controller number of 0.
Returns | |
---|---|
int |
The controller number of the device. |
String getDescriptor ()
Gets the input device descriptor, which is a stable identifier for an input device.
An input device descriptor uniquely identifies an input device. Its value is intended to be persistent across system restarts, and should not change even if the input device is disconnected, reconnected or reconfigured at any time.
It is possible for there to be multiple InputDevice
instances that have the
same input device descriptor. This might happen in situations where a single
human input device registers multiple InputDevice
instances (HID collections)
that describe separate features of the device, such as a keyboard that also
has a trackpad. Alternately, it may be that the input devices are simply
indistinguishable, such as two keyboards made by the same manufacturer.
The input device descriptor returned by getDescriptor()
should only be
used when an application needs to remember settings associated with a particular
input device. For all other purposes when referring to a logical
InputDevice
instance at runtime use the id returned by getId()
.
Returns | |
---|---|
String |
The input device descriptor. |
InputDevice getDevice (int id)
Gets information about the input device with the specified id.
Parameters | |
---|---|
id |
int :
The device id. |
Returns | |
---|---|
InputDevice |
The input device or null if not found. |
int[] getDeviceIds ()
Gets the ids of all input devices in the system.
Returns | |
---|---|
int[] |
The input device ids. |
int getId ()
Gets the input device id.
Each input device receives a unique id when it is first configured
by the system. The input device id may change when the system is restarted or if the
input device is disconnected, reconnected or reconfigured at any time.
If you require a stable identifier for a device that persists across
boots and reconfigurations, use getDescriptor()
.
Returns | |
---|---|
int |
The input device id. |
KeyCharacterMap getKeyCharacterMap ()
Gets the key character map associated with this input device.
Returns | |
---|---|
KeyCharacterMap |
The key character map. |
int getKeyboardType ()
Gets the keyboard type.
Returns | |
---|---|
int |
The keyboard type. |
InputDevice.MotionRange getMotionRange (int axis)
Gets information about the range of values for a particular MotionEvent
axis.
If the device supports multiple sources, the same axis may have different meanings
for each source. Returns information about the first axis found for any source.
To obtain information about the axis for a specific source, use
getMotionRange(int, int)
.
Parameters | |
---|---|
axis |
int :
The axis constant. |
Returns | |
---|---|
InputDevice.MotionRange |
The range of values, or null if the requested axis is not supported by the device. |
InputDevice.MotionRange getMotionRange (int axis, int source)
Gets information about the range of values for a particular MotionEvent
axis
used by a particular source on the device.
If the device supports multiple sources, the same axis may have different meanings
for each source.
Parameters | |
---|---|
axis |
int :
The axis constant. |
source |
int :
The source for which to return information. |
Returns | |
---|---|
InputDevice.MotionRange |
The range of values, or null if the requested axis is not supported by the device. |
List<InputDevice.MotionRange> getMotionRanges ()
Gets the ranges for all axes supported by the device.
Returns | |
---|---|
List<InputDevice.MotionRange> |
The motion ranges for the device. |
See also:
String getName ()
Gets the name of this input device.
Returns | |
---|---|
String |
The input device name. |
int getProductId ()
Gets the product id for the given device, if available.
A product id uniquely identifies which product within the address space of a given vendor, identified by the device's vendor id. A value of 0 will be assigned where a product id is not available.
Returns | |
---|---|
int |
The product id of a given device |
int getSources ()
Gets the input sources supported by this input device as a combined bitfield.
Returns | |
---|---|
int |
The supported input sources. |
int getVendorId ()
Gets the vendor id for the given device, if available.
A vendor id uniquely identifies the company who manufactured the device. A value of 0 will be assigned where a vendor id is not available.
Returns | |
---|---|
int |
The vendor id of a given device |
Vibrator getVibrator ()
Gets the vibrator service associated with the device, if there is one.
Even if the device does not have a vibrator, the result is never null.
Use hasVibrator()
to determine whether a vibrator is
present.
Note that the vibrator associated with the device may be different from
the system vibrator. To obtain an instance of the system vibrator instead, call
getSystemService(Class
with VIBRATOR_SERVICE
as argument.
Returns | |
---|---|
Vibrator |
The vibrator service associated with the device, never null. |
boolean[] hasKeys (int... keys)
Gets whether the device is capable of producing the list of keycodes.
Parameters | |
---|---|
keys |
int :
The list of android keycodes to check for. |
Returns | |
---|---|
boolean[] |
An array of booleans where each member specifies whether the device is capable of generating the keycode given by the corresponding value at the same index in the keys array. |
boolean hasMicrophone ()
Reports whether the device has a built-in microphone.
Returns | |
---|---|
boolean |
Whether the device has a built-in microphone. |
boolean isVirtual ()
Returns true if the device is a virtual input device rather than a real one,
such as the virtual keyboard (see VIRTUAL_KEYBOARD
).
Virtual input devices are provided to implement system-level functionality and should not be seen or configured by users.
Returns | |
---|---|
boolean |
True if the device is virtual. |
See also:
boolean supportsSource (int source)
Determines whether the input device supports the given source or sources.
Parameters | |
---|---|
source |
int :
The input source or sources to check against. This can be a generic device
type such as SOURCE_MOUSE , a more generic device class, such as
SOURCE_CLASS_POINTER , or a combination of sources bitwise ORed together. |
Returns | |
---|---|
boolean |
Whether the device can produce all of the given sources. |
String toString ()
Returns a string representation of the object. In general, the
toString
method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString
method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@
', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
Returns | |
---|---|
String |
a string representation of the object. |
void writeToParcel (Parcel out, int flags)
Flatten this object in to a Parcel.
Parameters | |
---|---|
out |
Parcel :
The Parcel in which the object should be written. |
flags |
int :
Additional flags about how the object should be written.
May be 0 or PARCELABLE_WRITE_RETURN_VALUE .
|