> For the complete documentation index, see [llms.txt](https://wajahatkarim.gitbook.io/easyvalidation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wajahatkarim.gitbook.io/easyvalidation/usage/validation-using-extension-methods.md). # Extension Methods ### **Overview** **EasyValidation** utilizes the power of Kotlin Extension methods and provides you huge number of [built-in validation rules](https://wajahatkarim.gitbook.io/easyvalidation/usage/built-in-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: ```kotlin var txtEmail = findViewById(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. | --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. 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