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InputDevice

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.

Summary

Nested classes

class InputDevice.MotionRange

Provides information about the range of values for a particular MotionEvent axis. 

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 is deprecated. Use MotionEvent#AXIS_ORIENTATION instead.

int MOTION_RANGE_PRESSURE

This constant is deprecated. Use MotionEvent#AXIS_PRESSURE instead.

int MOTION_RANGE_SIZE

This constant is deprecated. Use MotionEvent#AXIS_SIZE instead.

int MOTION_RANGE_TOOL_MAJOR

This constant is deprecated. Use MotionEvent#AXIS_TOOL_MAJOR instead.

int MOTION_RANGE_TOOL_MINOR

This constant is deprecated. Use MotionEvent#AXIS_TOOL_MINOR instead.

int MOTION_RANGE_TOUCH_MAJOR

This constant is deprecated. Use MotionEvent#AXIS_TOUCH_MAJOR instead.

int MOTION_RANGE_TOUCH_MINOR

This constant is deprecated. Use MotionEvent#AXIS_TOUCH_MINOR instead.

int MOTION_RANGE_X

This constant is deprecated. Use MotionEvent#AXIS_X instead.

int MOTION_RANGE_Y

This constant is deprecated. Use MotionEvent#AXIS_Y instead.

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 SOURCE_CLASS_POINTER).

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_MOUSE_RELATIVE

The input source is a mouse device whose relative motions should be interpreted as navigation events.

int SOURCE_ROTARY_ENCODER

The input source is a rotating encoder device whose motions should be interpreted as akin to those of a scroll wheel.

int SOURCE_SENSOR

The input source is a sensor associated with the input 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 SOURCE_TOUCHSCREEN).

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

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.

BatteryState getBatteryState()

Gets the battery state object associated with the device, if there is one.

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.

LightsManager getLightsManager()

Gets the lights manager associated with the device, if there is one.

InputDevice.MotionRange getMotionRange(int axis)

Gets information about the range of values for a particular MotionEvent axis.

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.

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.

SensorManager getSensorManager()

Gets the sensor manager service associated with the input device.

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()

This method is deprecated. Use getVibratorManager() to retrieve the default device vibrator.

VibratorManager getVibratorManager()

Gets the vibrator manager associated with the device.

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 isEnabled()

Returns true if input device is enabled.

boolean isExternal()

Returns true if the device is external (connected to USB or Bluetooth or some other peripheral bus), otherwise it is built-in.

boolean isVirtual()

Returns true if the device is a virtual input device rather than a real one, such as the virtual keyboard (see KeyCharacterMap#VIRTUAL_KEYBOARD).

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

Constants

KEYBOARD_TYPE_ALPHABETIC

public static final int KEYBOARD_TYPE_ALPHABETIC

The keyboard supports a complement of alphabetic keys.

Constant Value: 2 (0x00000002)

KEYBOARD_TYPE_NONE

public static final int KEYBOARD_TYPE_NONE

There is no keyboard.

Constant Value: 0 (0x00000000)

KEYBOARD_TYPE_NON_ALPHABETIC

public static final 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)

MOTION_RANGE_ORIENTATION

public static final int MOTION_RANGE_ORIENTATION

This constant is deprecated.
Use MotionEvent#AXIS_ORIENTATION instead.

Constant for retrieving the range of values for MotionEvent#AXIS_ORIENTATION.

See also:

Constant Value: 8 (0x00000008)

MOTION_RANGE_PRESSURE

public static final int MOTION_RANGE_PRESSURE

This constant is deprecated.
Use MotionEvent#AXIS_PRESSURE instead.

Constant for retrieving the range of values for MotionEvent#AXIS_PRESSURE.

See also:

Constant Value: 2 (0x00000002)

MOTION_RANGE_SIZE

public static final int MOTION_RANGE_SIZE

This constant is deprecated.
Use MotionEvent#AXIS_SIZE instead.

Constant for retrieving the range of values for MotionEvent#AXIS_SIZE.

See also:

Constant Value: 3 (0x00000003)

MOTION_RANGE_TOOL_MAJOR

public static final int MOTION_RANGE_TOOL_MAJOR

This constant is deprecated.
Use MotionEvent#AXIS_TOOL_MAJOR instead.

Constant for retrieving the range of values for MotionEvent#AXIS_TOOL_MAJOR.

See also:

Constant Value: 6 (0x00000006)

MOTION_RANGE_TOOL_MINOR

public static final int MOTION_RANGE_TOOL_MINOR

This constant is deprecated.
Use MotionEvent#AXIS_TOOL_MINOR instead.

Constant for retrieving the range of values for MotionEvent#AXIS_TOOL_MINOR.

See also:

Constant Value: 7 (0x00000007)

MOTION_RANGE_TOUCH_MAJOR

public static final int MOTION_RANGE_TOUCH_MAJOR

This constant is deprecated.
Use MotionEvent#AXIS_TOUCH_MAJOR instead.

Constant for retrieving the range of values for MotionEvent#AXIS_TOUCH_MAJOR.

See also:

Constant Value: 4 (0x00000004)

MOTION_RANGE_TOUCH_MINOR

public static final int MOTION_RANGE_TOUCH_MINOR

This constant is deprecated.
Use MotionEvent#AXIS_TOUCH_MINOR instead.

Constant for retrieving the range of values for MotionEvent#AXIS_TOUCH_MINOR.

See also:

Constant Value: 5 (0x00000005)

MOTION_RANGE_X

public static final int MOTION_RANGE_X

This constant is deprecated.
Use MotionEvent#AXIS_X instead.

Constant for retrieving the range of values for MotionEvent#AXIS_X.

See also:

Constant Value: 0 (0x00000000)

MOTION_RANGE_Y

public static final int MOTION_RANGE_Y

This constant is deprecated.
Use MotionEvent#AXIS_Y instead.

Constant for retrieving the range of values for MotionEvent#AXIS_Y.

See also:

Constant Value: 1 (0x00000001)

SOURCE_ANY

public static final 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)

SOURCE_BLUETOOTH_STYLUS

public static final 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 MotionEvent#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 MotionEvent#TOOL_TYPE_FINGER and another pointer with tool type MotionEvent#TOOL_TYPE_STYLUS. So it is important to examine the tool type of each pointer, regardless of the source reported by MotionEvent#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)

SOURCE_CLASS_BUTTON

public static final 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)

SOURCE_CLASS_JOYSTICK

public static final 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)

SOURCE_CLASS_MASK

public static final 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)

SOURCE_CLASS_NONE

public static final 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)

SOURCE_CLASS_POINTER

public static final 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)

SOURCE_CLASS_POSITION

public static final 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)

SOURCE_CLASS_TRACKBALL

public static final 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)

SOURCE_DPAD

public static final int SOURCE_DPAD

The input source is a DPad.

See also:

Constant Value: 513 (0x00000201)

SOURCE_GAMEPAD

public static final int SOURCE_GAMEPAD

The input source is a game pad. (It may also be a SOURCE_JOYSTICK).

See also:

Constant Value: 1025 (0x00000401)

SOURCE_HDMI

public static final 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)

SOURCE_JOYSTICK

public static final int SOURCE_JOYSTICK

The input source is a joystick. (It may also be a SOURCE_GAMEPAD).

See also:

Constant Value: 16777232 (0x01000010)

SOURCE_KEYBOARD

public static final 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)

SOURCE_MOUSE

public static final 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)

SOURCE_MOUSE_RELATIVE

public static final int SOURCE_MOUSE_RELATIVE

The input source is a mouse device whose relative motions should be interpreted as navigation events.

See also:

Constant Value: 131076 (0x00020004)

SOURCE_ROTARY_ENCODER

public static final int SOURCE_ROTARY_ENCODER

The input source is a rotating encoder device whose motions should be interpreted as akin to those of a scroll wheel.

See also:

Constant Value: 4194304 (0x00400000)

SOURCE_SENSOR

public static final int SOURCE_SENSOR

The input source is a sensor associated with the input device.

See also:

Constant Value: 67108864 (0x04000000)

SOURCE_STYLUS

public static final 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 MotionEvent#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 MotionEvent#TOOL_TYPE_FINGER and another pointer with tool type MotionEvent#TOOL_TYPE_STYLUS. So it is important to examine the tool type of each pointer, regardless of the source reported by MotionEvent#getSource().

See also:

Constant Value: 16386 (0x00004002)

SOURCE_TOUCHPAD

public static final 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)

SOURCE_TOUCHSCREEN

public static final int SOURCE_TOUCHSCREEN

The input source is a touch screen pointing device.

See also:

Constant Value: 4098 (0x00001002)

SOURCE_TOUCH_NAVIGATION

public static final 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)

SOURCE_TRACKBALL

public static final int SOURCE_TRACKBALL

The input source is a trackball.

See also:

Constant Value: 65540 (0x00010004)

SOURCE_UNKNOWN

public static final int SOURCE_UNKNOWN

The input source is unknown.

Constant Value: 0 (0x00000000)

Fields

CREATOR

public static final Creator<InputDevice> CREATOR

Public methods

describeContents

public 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(android.os.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. Value is either 0 or CONTENTS_FILE_DESCRIPTOR

getBatteryState

public BatteryState getBatteryState ()

Gets the battery state object associated with the device, if there is one. Even if the device does not have a battery, the result is never null. Use BatteryState#isPresent to determine whether a battery is present.

Returns
BatteryState The battery object associated with the device, never null.

getControllerNumber

public 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.

getDescriptor

public 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.

getDevice

public static 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.

getDeviceIds

public static int[] getDeviceIds ()

Gets the ids of all input devices in the system.

Returns
int[] The input device ids.

getId

public 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.

getKeyCharacterMap

public KeyCharacterMap getKeyCharacterMap ()

Gets the key character map associated with this input device.

Returns
KeyCharacterMap The key character map.

getKeyboardType

public int getKeyboardType ()

Gets the keyboard type.

Returns
int The keyboard type.

getLightsManager

public LightsManager getLightsManager ()

Gets the lights manager associated with the device, if there is one. Even if the device does not have lights, the result is never null. Use LightsManager#getLights to determine whether any lights is present.

Returns
LightsManager The lights manager associated with the device, never null.

getMotionRange

public 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.

See also:

getMotionRange

public 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.

See also:

getMotionRanges

public 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:

getName

public String getName ()

Gets the name of this input device.

Returns
String The input device name.

getProductId

public 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

getSensorManager

public SensorManager getSensorManager ()

Gets the sensor manager service associated with the input device. Even if the device does not have a sensor, the result is never null. Use SensorManager#getSensorList to get a full list of all supported sensors. Note that the sensors associated with the device may be different from the system sensors, as typically they are builtin sensors physically attached to input devices.

Returns
SensorManager The sensor manager service associated with the device, never null.

getSources

public int getSources ()

Gets the input sources supported by this input device as a combined bitfield.

Returns
int The supported input sources.

getVendorId

public 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

getVibrator

public Vibrator getVibrator ()

This method is deprecated.
Use getVibratorManager() to retrieve the default device vibrator.

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 Vibrator#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 Context#getSystemService with Context#VIBRATOR_SERVICE as argument.

Returns
Vibrator The vibrator service associated with the device, never null.

getVibratorManager

public VibratorManager getVibratorManager ()

Gets the vibrator manager associated with the device. Even if the device does not have a vibrator manager, the result is never null. Use VibratorManager#getVibratorIds to determine whether any vibrator is present.

Returns
VibratorManager The vibrator manager associated with the device, never null.

hasKeys

public 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.

hasMicrophone

public boolean hasMicrophone ()

Reports whether the device has a built-in microphone.

Returns
boolean Whether the device has a built-in microphone.

isEnabled

public boolean isEnabled ()

Returns true if input device is enabled.

Returns
boolean Whether the input device is enabled.

isExternal

public boolean isExternal ()

Returns true if the device is external (connected to USB or Bluetooth or some other peripheral bus), otherwise it is built-in.

Returns
boolean True if the device is external.

isVirtual

public boolean isVirtual ()

Returns true if the device is a virtual input device rather than a real one, such as the virtual keyboard (see KeyCharacterMap#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:

supportsSource

public 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 InputDevice#SOURCE_MOUSE, a more generic device class, such as InputDevice#SOURCE_CLASS_POINTER, or a combination of sources bitwise ORed together.
Returns
boolean Whether the device can produce all of the given sources.

toString

public 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.

writeToParcel

public 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.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES
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