DigitsKeyListener

open class DigitsKeyListener : NumberKeyListener

kotlin.Any
↳	android.text.method.MetaKeyKeyListener
	↳	android.text.method.BaseKeyListener
		↳	android.text.method.NumberKeyListener
			↳	android.text.method.DigitsKeyListener

For digits-only text entry

As for all implementations of KeyListener, this class is only concerned with hardware keyboards. Software input methods have no obligation to trigger the methods in this class.

Summary

Inherited constants

From class MetaKeyKeyListener

`Int`	`META_ALT_LOCKED` Flag that indicates that the ALT key is locked.
`Int`	`META_ALT_ON` Flag that indicates that the ALT key is on. Value equals `KeyEvent.META_ALT_ON`.
`Int`	`META_CAP_LOCKED` Flag that indicates that the SHIFT key is locked in CAPS mode.
`Int`	`META_SHIFT_ON` Flag that indicates that the SHIFT key is on. Value equals `KeyEvent.META_SHIFT_ON`.
`Int`	`META_SYM_LOCKED` Flag that indicates that the SYM key is locked.
`Int`	`META_SYM_ON` Flag that indicates that the SYM key is on. Value equals `KeyEvent.META_SYM_ON`.

Public constructors
`DigitsKeyListener()` Allocates a DigitsKeyListener that accepts the ASCII digits 0 through 9.
`DigitsKeyListener(sign: Boolean, decimal: Boolean)` Allocates a DigitsKeyListener that accepts the ASCII digits 0 through 9, plus the ASCII plus or minus sign (only at the beginning) and/or the ASCII period ('.') as the decimal point (only one per field) if specified.
`DigitsKeyListener(locale: Locale?)`
`DigitsKeyListener(locale: Locale?, sign: Boolean, decimal: Boolean)`

Public methods
open CharSequence!	`filter(source: CharSequence!, start: Int, end: Int, dest: Spanned!, dstart: Int, dend: Int)` This method is called when the buffer is going to replace the range `dstart … dend` of `dest` with the new text from the range `start … end` of `source`.
open Int	`getInputType()` Returns the input type for the listener.
open static DigitsKeyListener	`getInstance()` Returns a DigitsKeyListener that accepts the ASCII digits 0 through 9.
open static DigitsKeyListener	`getInstance(sign: Boolean, decimal: Boolean)` Returns a DigitsKeyListener that accepts the ASCII digits 0 through 9, plus the ASCII plus or minus sign (only at the beginning) and/or the ASCII period ('.') as the decimal point (only one per field) if specified.
open static DigitsKeyListener	`getInstance(accepted: String)` Returns a DigitsKeyListener that accepts only the characters that appear in the specified String.
open static DigitsKeyListener	`getInstance(locale: Locale?)` Returns a DigitsKeyListener that accepts the locale-appropriate digits.
open static DigitsKeyListener	`getInstance(locale: Locale?, sign: Boolean, decimal: Boolean)` Returns a DigitsKeyListener that accepts the locale-appropriate digits, plus the locale-appropriate plus or minus sign (only at the beginning) and/or the locale-appropriate decimal separator (only one per field) if specified.

Protected methods
open CharArray	`getAcceptedChars()` You can say which characters you can accept.

Inherited functions

From class MetaKeyKeyListener

`Unit`	`adjustMetaAfterKeypress(content: Spannable!)` Call this method after you handle a keypress so that the meta state will be reset to unshifted (if it is not still down) or primed to be reset to unshifted (once it is released).
`Long`	`adjustMetaAfterKeypress(state: Long)` Call this method after you handle a keypress so that the meta state will be reset to unshifted (if it is not still down) or primed to be reset to unshifted (once it is released). Takes the current state, returns the new state.
`Unit`	`clearMetaKeyState(view: View!, content: Editable!, states: Int)`
`Long`	`clearMetaKeyState(state: Long, which: Int)` Clears the state of the specified meta key if it is locked.
`Unit`	`clearMetaKeyState(content: Editable!, states: Int)`
`Int`	`getMetaState(text: CharSequence!)` Gets the state of the meta keys.
`Int`	`getMetaState(text: CharSequence!, event: KeyEvent!)` Gets the state of the meta keys for a specific key event. For input devices that use toggled key modifiers, the `toggled' state is stored into the text buffer. This method retrieves the meta state for this event, accounting for the stored state. If the event has been created by a device that does not support toggled key modifiers, like a virtual device for example, the stored state is ignored.
`Int`	`getMetaState(text: CharSequence!, meta: Int)` Gets the state of a particular meta key.
`Int`	`getMetaState(text: CharSequence!, meta: Int, event: KeyEvent!)` Gets the state of a particular meta key to use with a particular key event. If the key event has been created by a device that does not support toggled key modifiers, like a virtual keyboard for example, only the meta state in the key event is considered.
`Int`	`getMetaState(state: Long)` Gets the state of the meta keys.
`Int`	`getMetaState(state: Long, meta: Int)` Gets the state of a particular meta key.
`Long`	`handleKeyDown(state: Long, keyCode: Int, event: KeyEvent!)` Handles presses of the meta keys.
`Long`	`handleKeyUp(state: Long, keyCode: Int, event: KeyEvent!)` Handles release of the meta keys.
`Boolean`	`isMetaTracker(text: CharSequence!, what: Any!)` Returns true if this object is one that this class would use to keep track of any meta state in the specified text.
`Boolean`	`isSelectingMetaTracker(text: CharSequence!, what: Any!)` Returns true if this object is one that this class would use to keep track of the selecting meta state in the specified text.
`Boolean`	`onKeyUp(view: View!, content: Editable!, keyCode: Int, event: KeyEvent!)` Handles release of the meta keys.
`Unit`	`resetLockedMeta(content: Spannable!)` Call this if you are a method that ignores the locked meta state (arrow keys, for example) and you handle a key.
`Long`	`resetLockedMeta(state: Long)` Call this if you are a method that ignores the locked meta state (arrow keys, for example) and you handle a key.
`Unit`	`resetMetaState(text: Spannable!)` Resets all meta state to inactive.

From class BaseKeyListener

`Boolean`	`backspace(view: View!, content: Editable!, keyCode: Int, event: KeyEvent!)` Performs the action that happens when you press the `KeyEvent.KEYCODE_DEL` key in a `TextView`. If there is a selection, deletes the selection; otherwise, deletes the character before the cursor, if any; ALT+DEL deletes everything on the line the cursor is on.
`Boolean`	`forwardDelete(view: View!, content: Editable!, keyCode: Int, event: KeyEvent!)` Performs the action that happens when you press the `KeyEvent.KEYCODE_FORWARD_DEL` key in a `TextView`. If there is a selection, deletes the selection; otherwise, deletes the character before the cursor, if any; ALT+FORWARD_DEL deletes everything on the line the cursor is on.
`Boolean`	`onKeyOther(view: View!, content: Editable!, event: KeyEvent!)` Base implementation handles ACTION_MULTIPLE KEYCODE_UNKNOWN by inserting the event's text into the content.

From class KeyListener

Int

getInputType()

Return the type of text that this key listener is manipulating, as per android.text.InputType. This is used to determine the mode of the soft keyboard that is shown for the editor.

If you return android.text.InputType#TYPE_NULL then no soft keyboard will provided. In other words, you must be providing your own key pad for on-screen input and the key listener will be used to handle input from a hard keyboard.

If you return any other value, a soft input method will be created when the user puts focus in the editor, which will provide a keypad and also consume hard key events. This means that the key listener will generally not be used, instead the soft input method will take care of managing key input as per the content type returned here.

From class NumberKeyListener

`Int`	`lookup(event: KeyEvent!, content: Spannable!)`
`Boolean`	`ok(accept: CharArray!, c: Char)`
`Boolean`	`onKeyDown(view: View!, content: Editable!, keyCode: Int, event: KeyEvent!)` Handles presses of the meta keys.

Public constructors

DigitsKeyListener()

Deprecated: Use DigitsKeyListener(Locale) instead.

Allocates a DigitsKeyListener that accepts the ASCII digits 0 through 9.

DigitsKeyListener

DigitsKeyListener(
    sign: Boolean, 
    decimal: Boolean)

Deprecated: Use DigitsKeyListener(Locale,boolean,boolean) instead.

Allocates a DigitsKeyListener that accepts the ASCII digits 0 through 9, plus the ASCII plus or minus sign (only at the beginning) and/or the ASCII period ('.') as the decimal point (only one per field) if specified.

DigitsKeyListener

DigitsKeyListener(locale: Locale?)

Parameters
`locale`	Locale?: This value may be `null`.

DigitsKeyListener

DigitsKeyListener(
    locale: Locale?, 
    sign: Boolean, 
    decimal: Boolean)

Parameters
`locale`	Locale?: This value may be `null`.

Public methods

filter

open fun filter(
    source: CharSequence!, 
    start: Int, 
    end: Int, 
    dest: Spanned!, 
    dstart: Int, 
    dend: Int
): CharSequence!

This method is called when the buffer is going to replace the range dstart … dend of dest with the new text from the range start … end of source. Return the CharSequence that you would like to have placed there instead, including an empty string if appropriate, or null to accept the original replacement. Be careful to not to reject 0-length replacements, as this is what happens when you delete text. Also beware that you should not attempt to make any changes to dest from this method; you may only examine it for context. Note: If source is an instance of Spanned or Spannable, the span objects in the source should be copied into the filtered result (i.e. the non-null return value). TextUtils.copySpansFrom can be used for convenience if the span boundary indices would be remaining identical relative to the source.

getInputType

open fun getInputType(): Int

Returns the input type for the listener.

getInstance

open static fun getInstance(): DigitsKeyListener

Deprecated: Use getInstance(Locale) instead.

Returns a DigitsKeyListener that accepts the ASCII digits 0 through 9.

Return
`DigitsKeyListener`	This value cannot be `null`.

getInstance

open static fun getInstance(
    sign: Boolean, 
    decimal: Boolean
): DigitsKeyListener

Deprecated: Use getInstance(Locale,boolean,boolean) instead.

Returns a DigitsKeyListener that accepts the ASCII digits 0 through 9, plus the ASCII plus or minus sign (only at the beginning) and/or the ASCII period ('.') as the decimal point (only one per field) if specified.

Return
`DigitsKeyListener`	This value cannot be `null`.

getInstance

open static fun getInstance(accepted: String): DigitsKeyListener

Returns a DigitsKeyListener that accepts only the characters that appear in the specified String. Note that not all characters may be available on every keyboard.

Parameters
`accepted`	String: This value cannot be `null`.

Return
`DigitsKeyListener`	This value cannot be `null`.

getInstance

open static fun getInstance(locale: Locale?): DigitsKeyListener

Returns a DigitsKeyListener that accepts the locale-appropriate digits.

Parameters
`locale`	Locale?: This value may be `null`.

Return
`DigitsKeyListener`	This value cannot be `null`.

getInstance

open static fun getInstance(
    locale: Locale?, 
    sign: Boolean, 
    decimal: Boolean
): DigitsKeyListener

Returns a DigitsKeyListener that accepts the locale-appropriate digits, plus the locale-appropriate plus or minus sign (only at the beginning) and/or the locale-appropriate decimal separator (only one per field) if specified.

Parameters
`locale`	Locale?: This value may be `null`.

Return
`DigitsKeyListener`	This value cannot be `null`.

Protected methods

getAcceptedChars

protected open fun getAcceptedChars(): CharArray

You can say which characters you can accept.

Return
`CharArray`	This value cannot be `null`.

Content and code samples on this page are subject to the licenses described in the Content License. Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.