Email and phone Number Validation in android

Question

I have a registration form in my application which I am trying to validate. I\'m facing some problems with my validation while validating the phone number and email fields.<

Answer 1

//validation class

public class EditTextValidation {

public static boolean isValidText(CharSequence target) {
    return target != null && target.length() != 0;
}

public static boolean isValidEmail(CharSequence target) {
    if (target == null) {
        return false;
    } else {
        return android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
    }
}

public static boolean isValidPhoneNumber(CharSequence target) {
    if (target.length() != 10) {
        return false;
    } else {
        return android.util.Patterns.PHONE.matcher(target).matches();
    }
}

//activity or fragment

    val userName = registerNameET.text?.trim().toString()
    val mobileNo = registerMobileET.text?.trim().toString()
    val emailID = registerEmailIDET.text?.trim().toString()

    when {
        !EditTextValidation.isValidText(userName) -> registerNameET.error = "Please provide name"
        !EditTextValidation.isValidEmail(emailID) -> registerEmailIDET.error =
            "Please provide email"
        !EditTextValidation.isValidPhoneNumber(mobileNo) -> registerMobileET.error =
            "Please provide mobile number"
        else -> {
            showToast("Hello World")
        }
    }

**Hope it will work for you... It is a working example.