Extension Methods

This section describes how to use Kotlin extension methods for validation checks.

Overview

EasyValidation utilizes the power of Kotlin Extension methods and provides you huge number of built-in validation rules in form of extensions on String, EditText, TextView, AutoCompleteTextView, TextInputLayout, and Spinner classes.

For example, you can check some validation checks on EditText like this:

var txtEmail = findViewById<EditText>(R.id.txtEmail)
// Valid email check
txtName.validEmail() { msg ->
// Invalid email
txtName.error = msg
}
// Minimum length check
txtName.minLength(5) {
txtName.error = it
}

List of Extension Methods

Here is the list of all extension methods for String, EditText, TextView, AutoCompleteTextView, TextInputLayout, and Spinner classes.

Method

Description

validator()

Returns the Validator object with text

nonEmpty()

Returns true if the text is not empty. And returns false if text is empty.

minLength()

Returns false if the length of text is less than given minimum length.

maxLength()

Returns false if text length is greater than given length

validEmail()

Returns true if text is a valid email address.

validNumber()

Returns true if the text is any valid number

greaterThan()

Returns false if the text is number less than the given target number

greaterThanOrEqual()

Returns false if the text is number less than or equal to the given target number

lessThan()

Returns false if the text is number greater than the given target number

lessThanOrEqaul()

Returns false if the text is number greater than or equal to the given target number

numberEqualTo()

Returns false if the text is a valid number and equal to the given target number

allUperCase()

Returns false if at least one or more characters are lower case

allLowerCase()

Returns false if at least one or more characters are upper case

atleastOneUperCase()

Returns true if at least one or more characters are upper case

atleastOneLowerCase()

Returns true if at least one or more characters are lower case

atleastOneNumber()

Returns true if at least one or more characters are numbers

startWithNumber()

Returns true if text starts with any number

startWithNonNumber()

Returns false if text starts with any number

noNumbers()

Returns false if the text any number or digit.

onlyNumbers()

Returns false if text contains any alphabetic character

noSpecialCharacters()

Returns true if text contain no special characters

atleastOneSpecialCharacters()

Returns true if text contain at least one special characters

textEqaulTo()

Returns false if the text is not equal to the given text

textNotEqualTo()

Returns true if the text is not equal to the given text

startsWith()

Returns true if the text starts with the given text

endsWith()

Returns true if the text ends with the given text

contains()

Returns true if the text contains the given text

notContains()

Returns false if the text contains the given text

creditCardNumber()

Returns true if the text is valid credit card number. This supports Visa, Master Card, American Express, Diners Club, Discover, and JCB.

creditCardNumberWithSpaces()

Returns true if the text is valid credit card number with spaces between 4 characters. This supports Visa, Master Card, American Express, Diners Club, Discover and JCB.

creditCardNumberWithDashes()

Returns true if the text is valid credit card number with dashes between 4 characters. This supports Visa, Master Card, American Express, Diners Club, Discover, and JCB.

validUrl()

Returns true if the text is a valid URL

regex()

Returns true if the text matches passed RegEx pattern.