Added in API level 1

InputFilter


interface InputFilter
InputFilter.AllCaps

This filter will capitalize all the lowercase and titlecase letters that are added through edits.

InputFilter.LengthFilter

This filter will constrain edits not to make the length of the text greater than the specified length.

LoginFilter

Abstract class for filtering login-related text (user names and passwords)

NumberKeyListener

For numeric text entry

DateKeyListener

For entering dates in a text field.

DateTimeKeyListener

For entering dates and times in the same text field.

DialerKeyListener

For dialing-only text entry

DigitsKeyListener

For digits-only text entry

LoginFilter.PasswordFilterGMail

This filter is compatible with GMail passwords which restricts characters to the Latin-1 (ISO8859-1) char set.

LoginFilter.UsernameFilterGMail

This filter rejects characters in the user name that are not compatible with GMail account creation.

LoginFilter.UsernameFilterGeneric

This filter rejects characters in the user name that are not compatible with Google login.

TimeKeyListener

For entering times in a text field.

InputFilters can be attached to Editables to constrain the changes that can be made to them.

Summary

Nested classes
open

This filter will capitalize all the lowercase and titlecase letters that are added through edits.

open

This filter will constrain edits not to make the length of the text greater than the specified length.

Public methods
abstract 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.

Public methods

filter

Added in API level 1
abstract 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.