Email Address Validation in Android on Edittext

Email Address Validation in Android on EditText

To perform Email Validation we have many ways,but simple & easiest way are two methods.

1- Using EditText(....).addTextChangedListener which keeps triggering on every input in an EditText box i.e email_id is invalid or valid

/**
 * Email Validation ex:- tech@end.com
*/

final EditText emailValidate = (EditText)findViewById(R.id.textMessage); 

final TextView textView = (TextView)findViewById(R.id.text); 

String email = emailValidate.getText().toString().trim();

String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";

emailValidate .addTextChangedListener(new TextWatcher() { 
    public void afterTextChanged(Editable s) { 

    if (email.matches(emailPattern) && s.length() > 0)
        { 
            Toast.makeText(getApplicationContext(),"valid email address",Toast.LENGTH_SHORT).show();
            // or
            textView.setText("valid email");
        }
        else
        {
             Toast.makeText(getApplicationContext(),"Invalid email address",Toast.LENGTH_SHORT).show();
            //or
            textView.setText("invalid email");
        }
    } 
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    // other stuffs 
    } 
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    // other stuffs 
    } 
}); 

2- Simplest method using if-else condition. Take the EditText box string using getText() and compare with pattern provided for email. If pattern doesn't match or macthes, onClick of button toast a message. It ll not trigger on every input of an character in EditText box . simple example shown below.

final EditText emailValidate = (EditText)findViewById(R.id.textMessage); 

final TextView textView = (TextView)findViewById(R.id.text); 

String email = emailValidate.getText().toString().trim();

String emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+";

// onClick of button perform this simplest code.
if (email.matches(emailPattern))
{
Toast.makeText(getApplicationContext(),"valid email address",Toast.LENGTH_SHORT).show();
}
else 
{
Toast.makeText(getApplicationContext(),"Invalid email address", Toast.LENGTH_SHORT).show();
}

Android Email Validation on EditText

Why not use:

public final static boolean isValidEmail(CharSequence target) {
  return !TextUtils.isEmpty(target) && android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
}

As suggested here.

How can i validate email in android?

try this my friend

 String emailAddress = etSignInEmail.getText().toString().trim();

 if (android.util.Patterns.EMAIL_ADDRESS.matcher(emailAddress).matches()) {
     useremail_layout.setError("valid Email address");
}
else{
       useremail_layout.setError("invalid Email address");
}

Email validation on EditText - Android

We have a simple Email pattern matcher now

Java:

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

Kotlin Function:

 private fun isValidEmail(email: String): Boolean {
        return !TextUtils.isEmpty(email) && Patterns.EMAIL_ADDRESS.matcher(email).matches()
    }

Kotlin Extension:

fun String.isValidEmail() =
    !TextUtils.isEmpty(this) && Patterns.EMAIL_ADDRESS.matcher(this).matches()

Validate an email inside an EditText

Just change your regular expression as follows:

"[a-zA-Z0-9._-]+@[a-z]+\\.+[a-z]+"

Because . (dot) means match any single-char.ADD a double backslash before your dot to stand for a real dot.

How should I validate an e-mail address?

Don't use a reg-ex.

Apparently the following is a reg-ex that correctly validates most e-mails addresses that conform to RFC 2822, (and will still fail on things like "user@gmail.com.nospam", as will org.apache.commons.validator.routines.EmailValidator)

(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])

Possibly the easiest way to validate an e-mail to just send a confirmation e-mail to the address provided and it it bounces then it's not valid.

If you want to perform some basic checks you could just check that it's in the form *@*

If you have some business logic specific validation then you could perform that using a regex, e.g. must be a gmail.com account or something.

Android Email EditText Validation

Here By giving input type Email you are setting the keyboard of email type means "@" and "." keyword will display on key board.

the better solution is to compare the email by following function

public boolean isEmailValid(String email)
    {
         String regExpn =
             "^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]{1}|[\\w-]{2,}))@"
                 +"((([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])){1}|"
                   +"([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]{2,4})$";

     CharSequence inputStr = email;

     Pattern pattern = Pattern.compile(regExpn,Pattern.CASE_INSENSITIVE);
     Matcher matcher = pattern.matcher(inputStr);

     if(matcher.matches())
        return true;
     else
        return false;
}

if this function returns true then your email address is valid otherwise not

How to check edittext's text is email address or not?

/**
 * method is used for checking valid email id format.
 * 
 * @param email
 * @return boolean true for valid false for invalid
 */
public static boolean isEmailValid(String email) {
    String expression = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";
    Pattern pattern = Pattern.compile(expression, Pattern.CASE_INSENSITIVE);
    Matcher matcher = pattern.matcher(email);
    return matcher.matches();
}

Pass your edit text string in this function .

for right email verification you need server side authentication

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Note there is now a built-in method in Android, see answers below.

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