KeyCharacterMap

ALPHA

static val ALPHA: Int

A keyboard with all the letters, and maybe some numbers.

An alphabetic keyboard supports text entry directly but may have a condensed layout with a small form factor. In contrast to a full keyboard, some symbols may only be accessible using special on-screen character pickers. In addition, to improve typing speed and accuracy, the framework provides special affordances for alphabetic keyboards such as auto-capitalization and toggled / locked shift and alt keys.

This type of keyboard is generally designed for thumb typing.

Value: 3

BUILT_IN_KEYBOARD

static val BUILT_IN_KEYBOARD: Int

Deprecated: This constant should no longer be used because there is no guarantee that a device has a built-in keyboard that can be used for typing text. There might not be a built-in keyboard, the built-in keyboard might be a NUMERIC or SPECIAL_FUNCTION keyboard, or there might be multiple keyboards installed including external keyboards. When interpreting key presses received from the framework, applications should use the device id specified in the KeyEvent received. When synthesizing key presses for delivery elsewhere or when translating key presses from unknown keyboards, applications should use the special VIRTUAL_KEYBOARD device id.

The id of the device's primary built in keyboard is always 0.

Value: 0

COMBINING_ACCENT

static val COMBINING_ACCENT: Int

Value: -2147483648

COMBINING_ACCENT_MASK

static val COMBINING_ACCENT_MASK: Int

Mask the return value from get(int,int) with this value to get a printable representation of the accent character of a "dead key."

Value: 2147483647

FULL

static val FULL: Int

A full PC-style keyboard.

A full keyboard behaves like a PC keyboard. All symbols are accessed directly by pressing keys on the keyboard without on-screen support or affordances such as auto-capitalization.

This type of keyboard is generally designed for full two hand typing.

Value: 4

HEX_INPUT

static val HEX_INPUT: Char

This private-use character is used to trigger Unicode character input by hex digits.

Value: 61184

MODIFIER_BEHAVIOR_CHORDED

static val MODIFIER_BEHAVIOR_CHORDED: Int

Modifier keys may be chorded with character keys.

Value: 0

MODIFIER_BEHAVIOR_CHORDED_OR_TOGGLED

static val MODIFIER_BEHAVIOR_CHORDED_OR_TOGGLED: Int

Modifier keys may be chorded with character keys or they may toggle into latched or locked states when pressed independently.

Value: 1

NUMERIC

static val NUMERIC: Int

A numeric (12-key) keyboard.

A numeric keyboard supports text entry using a multi-tap approach. It may be necessary to tap a key multiple times to generate the desired letter or symbol.

This type of keyboard is generally designed for thumb typing.

Value: 1

PICKER_DIALOG_INPUT

static val PICKER_DIALOG_INPUT: Char

This private-use character is used to bring up a character picker for miscellaneous symbols.

Value: 61185

PREDICTIVE

static val PREDICTIVE: Int

A keyboard with all the letters, but with more than one letter per key.

This type of keyboard is generally designed for thumb typing.

Value: 2

SPECIAL_FUNCTION

static val SPECIAL_FUNCTION: Int

A keyboard that is only used to control special functions rather than for typing.

A special function keyboard consists only of non-printing keys such as HOME and POWER that are not actually used for typing.

Value: 5

VIRTUAL_KEYBOARD

static val VIRTUAL_KEYBOARD: Int

The id of a generic virtual keyboard with a full layout that can be used to synthesize key events. Typically used with getEvents.

Value: -1

describeContents

open fun describeContents(): Int

deviceHasKey

open static fun deviceHasKey(keyCode: Int): Boolean

Queries the framework about whether any physical keys exist on any currently attached input devices that are capable of producing the given key code.

deviceHasKeys

open static fun deviceHasKeys(keyCodes: IntArray!): BooleanArray!

Queries the framework about whether any physical keys exist on any currently attached input devices that are capable of producing the given array of key codes.

equals

open fun equals(other: Any?): Boolean

get

open fun get(
    keyCode: Int, 
    metaState: Int
): Int

Gets the Unicode character generated by the specified key and meta key state combination.

Returns the Unicode character that the specified key would produce when the specified meta bits (see MetaKeyKeyListener) were active.

Returns 0 if the key is not one that is used to type Unicode characters.

If the return value has bit COMBINING_ACCENT set, the key is a "dead key" that should be combined with another to actually produce a character -- see getDeadChar -- after masking with COMBINING_ACCENT_MASK.

getDeadChar

open static fun getDeadChar(
    accent: Int, 
    c: Int
): Int

Get the character that is produced by combining the dead key producing accent with the key producing character c. For example, getDeadChar('`', 'e') returns è. getDeadChar('^', ' ') returns '^' and getDeadChar('^', '^') returns '^'.

getDisplayLabel

open fun getDisplayLabel(keyCode: Int): Char

Gets the primary character for this key. In other words, the label that is physically printed on it.

getEvents

open fun getEvents(chars: CharArray!): Array<KeyEvent!>!

Get an array of KeyEvent objects that if put into the input stream could plausibly generate the provided sequence of characters. It is not guaranteed that the sequence is the only way to generate these events or that it is optimal.

This function is primarily offered for instrumentation and testing purposes. It may fail to map characters to key codes. In particular, the key character map for the built-in keyboard device id may be empty. Consider using the key character map associated with the virtual keyboard device id instead.

For robust text entry, do not use this function. Instead construct a KeyEvent with action code KeyEvent#ACTION_MULTIPLE that contains the desired string using KeyEvent#KeyEvent(long, String, int, int).

getKeyData

open fun getKeyData(
    keyCode: Int, 
    results: KeyCharacterMap.KeyData!
): Boolean

Deprecated: instead use KeyCharacterMap#getDisplayLabel(int), KeyCharacterMap#getNumber(int) or KeyCharacterMap#get(int, int).

Get the character conversion data for a given key code.

getKeyboardType

open fun getKeyboardType(): Int

Gets the keyboard type. Returns NUMERIC, PREDICTIVE, ALPHA, FULL or SPECIAL_FUNCTION.

Different keyboard types have different semantics. Refer to the documentation associated with the keyboard type constants for details.

getMatch

open fun getMatch(
    keyCode: Int, 
    chars: CharArray!
): Char

Gets the first character in the character array that can be generated by the specified key code.

This is a convenience function that returns the same value as getMatch(keyCode, chars, 0).

getMatch

open fun getMatch(
    keyCode: Int, 
    chars: CharArray!, 
    metaState: Int
): Char

Gets the first character in the character array that can be generated by the specified key code. If there are multiple choices, prefers the one that would be generated with the specified meta key modifier state.

getModifierBehavior

open fun getModifierBehavior(): Int

Gets a constant that describes the behavior of this keyboard's modifier keys such as KeyEvent#KEYCODE_SHIFT_LEFT.

Currently there are two behaviors that may be combined:

• Chorded behavior: When the modifier key is pressed together with one or more character keys, the keyboard inserts the modified keys and then resets the modifier state when the modifier key is released.
• Toggled behavior: When the modifier key is pressed and released on its own it first toggles into a latched state. When latched, the modifier will apply to next character key that is pressed and will then reset itself to the initial state. If the modifier is already latched and the modifier key is pressed and release on its own again, then it toggles into a locked state. When locked, the modifier will apply to all subsequent character keys that are pressed until unlocked by pressing the modifier key on its own one more time to reset it to the initial state. Toggled behavior is useful for small profile keyboards designed for thumb typing.

This function currently returns MODIFIER_BEHAVIOR_CHORDED when the keyboard type is FULL or SPECIAL_FUNCTION and MODIFIER_BEHAVIOR_CHORDED_OR_TOGGLED otherwise. In the future, the function may also take into account global keyboard accessibility settings, other user preferences, or new device capabilities.

getNumber

open fun getNumber(keyCode: Int): Char

Gets the number or symbol associated with the key.

The character value is returned, not the numeric value. If the key is not a number, but is a symbol, the symbol is retuned.

This method is intended to to support dial pads and other numeric or symbolic entry on keyboards where certain keys serve dual function as alphabetic and symbolic keys. This method returns the number or symbol associated with the key independent of whether the user has pressed the required modifier.

For example, on one particular keyboard the keys on the top QWERTY row generate numbers when ALT is pressed such that ALT-Q maps to '1'. So for that keyboard when getNumber is called with KeyEvent#KEYCODE_Q it returns '1' so that the user can type numbers without pressing ALT when it makes sense.

isPrintingKey

open fun isPrintingKey(keyCode: Int): Boolean

Returns true if the specified key produces a glyph.

load

open static fun load(deviceId: Int): KeyCharacterMap!

Loads the key character maps for the keyboard with the specified device id.

writeToParcel

open fun writeToParcel(
    out: Parcel, 
    flags: Int
): Unit

finalize

protected open fun finalize(): Unit

CREATOR

static val CREATOR: Parcelable.Creator<KeyCharacterMap!>