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LengthFilter
open class LengthFilter : InputFilter
This filter will constrain edits not to make the length of the text greater than the specified length.
Summary
| Public methods |
| open 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.
|
| open Int |
|
Public constructors
LengthFilter
LengthFilter(max: Int)
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.
getMax
open fun getMax(): Int
| Return |
Int |
the maximum length enforced by this input filter |
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Last updated 2026-02-13 UTC.
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