Validate Email Address Before Going To Second Activity

I have an activity with text edits one for name, email and password and a button that take the user to next activity.

The problem is that even if the user entered a invalid email address he still can go to second activity, I want the email address to be checked than if he entered a valid email address he can go to second activity, if not a toast message appears says INVALID EMAIL ADDRESS.

I am working with KOTLIN but I can work also with java.

Please can anyone guide me on how I can do it ?

Thanks in advance.

There is an interesting Java Library that you can use to test if an E-mail is valid or not.

Here is the Gradle dependency:

implementation group: 'commons-validator', name: 'commons-validator', version: '1.6'

Here is how you would validate an e-mail string:

First, capture the value of the editText into a String object. Then you can use the following pattern to capture a Boolean value that tells if the user has entered a Valid E-mail address.

String email = "";

Now, you can use the E-mail Validator:

 boolean isValid = EmailValidator.getInstance().isValid(email);

This is the easiest way I found. I hope that helps!

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fun isEmailValid(email: String): Boolean {
       return Pattern.compile(
 + "((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
 + "[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\."
 + "([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
 + "[0-9]{1,2}|25[0-5]|2[0-4][0-9]))|"
 + "([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]{2,4})$"

Free email address validator, This example demonstrates how to check email Address Validation in Android on edit Text.Step 1 − Create a new project in Android Studio, go to File ⇒ New Pr When the user clicks on a button, it will check edit text data and To run the app from android studio, open one of your project's activity files� Email Checker is a simple little tool for verifying an email address. It's free and quite easy to use. Just enter the email address and hit the check button. It tells you whether the email id is real or fake.

We have simple Email pattern matcher now

private static boolean isValidEmail(String email) {
        return !TextUtils.isEmpty(email) && android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();

How to check email Address Validation in Android on edit Text, Email validation is not a recurrent activity. new recipients have been added; it's been� Sending an email to an addresses that doesn't exist results in a 'hard bounce' or Non Delivery Reports (NDR). NDRs clog up your inbox requiring manual effort to both remove the NDR and perform good list hygiene by removing the bounced email address from your mailing list. The activity of processing NDRs requires time, effort and expenditure.

Verify Email Address Without Sending an Email, Email Validation and regular data hygiene is a key part of email and other email address discrepancies before they're flagged by Internet� Instead of using a regular expression to validate an email address, you can use the System.Net.Mail.MailAddress class. To determine whether an email address is valid, pass the email address to the MailAddress.MailAddress (String) class constructor. Source: Microsoft ASP.Net Website

Email Validation: How Email Verification Really Works, For one-by-one API verification, it will take 6 to 25 seconds to receive a response. When I send in a list for verification, what exactly will I receive back? You will� Disposable Email Address: We check if the email address has a domain name used for temporary email addresses. Webmail Email Addresses: We verify if the email address uses a webmail like Gmail or Yahoo. Presence of MX Records: We check if there are MX records on the domain. If there aren't, the email address can't receive emails.

Top 10 Bulk Email Verification and Validation Services Compared, In this video we will learn, how to validate an email address and password with which we Duration: 10:02 Posted: May 24, 2018 Well, since you can use your email service successfully, then the email sent to you for validating should be phishing. So, it is recommended that you report it as a spam/phishing via the method provided in my last reply. Regards, Alan-----

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