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dependencies {
  implementation 'com.github.anderscheow:validator:3.0.3'
}

Usage

Available rules

• LengthRule
• MaxRule
• MinRule
• NotEmptyRule
• NotNullRule
• RegexRule
• AlphabetRule
• AlphanumericRule
• DigitsRule
• EmailRule
• PasswordRule
• FutureRule
• PastRule
• CreditCardRule
• ContainRule
• NotContainRule
• EqualRule
• NotEqualRule
• NotBlankRule
• AllUpperCaseRule
• AllLowerCaseRule
• EndsWithRule
• StartsWithRule
• SymbolRule

Additional predefined rules to use in Validation or Condition

• contain
• notContain
• notEqualTo
• withinRange
• minimumLength
• maximumLength
• email
• alphanumericOnly
• alphabetOnly
• digitsOnly
• symbolsOnly
• allUppercase
• allLowercase
• startsWith
• endsWith
• withCreditCard
• withPassword
• notNull
• notEmpty
• notBlank
• regex
• future
• past
• matchAtLeastOneRule (Only for Validation)
• matchAllRules (Only for Validation)

Beside from using the provided Rules, you can create your own Rule by extending Rule (Create as many as you want)

class CustomRule : Rule("Value doesn't match 'ABC'") {
 
    override fun validate(value: String?): Boolean {
        if (value == null) {
            throw NullPointerException()
        }
        return value == "ABC"
    }
}

Add it to your Activity class

// Username
// Input: hello@test.com
val usernameInput = findViewById(R.id.layout_username)
val usernameValidation = validation(usernameInput) {
    conditions {
        +and(errorMessage = "Does not match 'And' condition") {
            +email(errorMessage = "")
            +endsWith(keyword = ".com", errorMessage = "")
        }
        +or(errorMessage = "Does not match 'Or' condition") {
            +minimumLength(minLength = 8, errorMessage = "")
            +contain(keyword = "hello", errorMessage = "")
        }
    }
}
 
// Password
// Input: 12345abc
val passwordInput = findViewById(R.id.layout_password)
val passwordValidation = validation(passwordInput) {
    rules {
        +notEmpty(errorMessage = "Input is empty")
        +minimumLength(minLength = 8, errorMessage = "Must have at least 8 characters")
    }
}

Mode

validator(applicationContext) {
    /* Set your mode here, by default is CONTINUOUS */
    mode = Mode.SINGLE
}

Single	Continuous

Validate the input field

// Order of the values on the success callback follow the sequence of your Validation object
validator(applicationContext) {
    mode = Mode.SINGLE
    listener = object : Validator.OnValidateListener {
        override fun onValidateSuccess(values: List<String>) {
            Log.d("MainActivity", values.toTypedArray().contentToString())
            Toast.makeText(
                applicationContext,
                "Validate successfully",
                Toast.LENGTH_LONG
            ).show()
        }

        override fun onValidateFailed(errors: List<String>) {
            Log.e("MainActivity", errors.toTypedArray().contentToString())
        }
    }
    validate(usernameValidation, passwordValidation)
}

• Introduce Validator library

Testing

I have added unit testing for Rules and Conditions, soon will provide test code on Validation and Validator, please check it out under Test code

Contributions

Any contribution is more than welcome! You can contribute through pull requests and issues on GitHub.

License

Validator is released under the MIT License