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NumberKeyListener

public abstract class NumberKeyListener
extends BaseKeyListener implements InputFilter

java.lang.Object
   ↳ android.text.method.MetaKeyKeyListener
     ↳ android.text.method.BaseKeyListener
       ↳ android.text.method.NumberKeyListener


For numeric 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

Public constructors

NumberKeyListener()

Public methods

CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend)

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.

boolean onKeyDown(View view, Editable content, int keyCode, KeyEvent event)

Handles presses of the meta keys.

Protected methods

abstract char[] getAcceptedChars()

You can say which characters you can accept.

int lookup(KeyEvent event, Spannable content)
static boolean ok(char[] accept, char c)

Inherited methods

Public constructors

NumberKeyListener

added in API level 1
public NumberKeyListener ()

Public methods

filter

added in API level 1
public CharSequence filter (CharSequence source, 
                int start, 
                int end, 
                Spanned dest, 
                int dstart, 
                int dend)

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(Spanned, int, int, Class, Spannable, int) can be used for convenience if the span boundary indices would be remaining identical relative to the source.

Parameters
source CharSequence

start int

end int

dest Spanned

dstart int

dend int

Returns
CharSequence

onKeyDown

added in API level 1
public boolean onKeyDown (View view, 
                Editable content, 
                int keyCode, 
                KeyEvent event)

Handles presses of the meta keys.

Parameters
view View

content Editable

keyCode int

event KeyEvent

Returns
boolean

Protected methods

getAcceptedChars

added in API level 1
protected abstract char[] getAcceptedChars ()

You can say which characters you can accept.

Returns
char[]

This value will never be null.

lookup

added in API level 1
protected int lookup (KeyEvent event, 
                Spannable content)

Parameters
event KeyEvent

content Spannable

Returns
int

ok

added in API level 1
protected static boolean ok (char[] accept, 
                char c)

Parameters
accept char

c char

Returns
boolean