Added in API level 27

Summary:

Validator

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Kotlin |Java

public interface Validator

android.service.autofill.Validator

Known indirect subclasses LuhnChecksumValidator, RegexValidator LuhnChecksumValidator Validator that returns true if the number created by concatenating all given fields pass a Luhn algorithm checksum.  RegexValidator Defines if a field is valid based on a regular expression (regex).

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Class used to define whether a condition is satisfied.

Typically used to avoid displaying the save UI when the user input is invalid.