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   Here is my code      private boolean validate          String MobilePattern     0-9  10          String email1   email getText   toString   trim        String emailPattern     a-zA-Z0-9  -    a-z       a-z          if  name length    gt  25             Toast makeText getApplicationContext     pls enter less the 25 character in user name   Toast LENGTH SHORT  show            return true         else if  name length      0    number length      0    email length                    0    subject length      0    message length      0             Toast makeText getApplicationContext     pls fill the empty fields   Toast LENGTH SHORT  show            return false         else if  email getText   toString   matches emailPattern                 Toast makeText getApplicationContext    valid email address  Toast LENGTH SHORT  show            return true         else if  email getText   toString   matches emailPattern               Toast makeText getApplicationContext    Please Enter Valid Email Address  Toast LENGTH SHORT  show            return false         else if number getText   toString   matches MobilePattern              Toast makeText getApplicationContext     phone number is valid   Toast LENGTH SHORT  show            return true         else if  number getText   toString   matches MobilePattern              Toast makeText getApplicationContext     Please enter valid 10 digit phone number   Toast LENGTH SHORT  show            return false             return false      I have used this code above for the validation  The problem I m facing is in the phone number and email validation  only one validation is working  For example  if I comment out the phone number validation  the email validation is working properly  If I comment out the email validation  the phone number validation is working  If use both validations  it s not working

User · Answer

Android has build-in patterns for email  phone number  etc  that you can use if you are building for Android API level 8 and above   private boolean isValidEmail CharSequence email        if   TextUtils isEmpty email             return Patterns EMAIL ADDRESS matcher email  matches              return false     private boolean isValidPhoneNumber CharSequence phoneNumber        if   TextUtils isEmpty phoneNumber             return Patterns PHONE matcher phoneNumber  matches              return false

User · Answer

For Email Address Validation  private boolean isValidMail String email         String EMAIL STRING       A-Za-z0-9-           A-Za-z0-9-                       A-Za-z0-9-       A-Za-z0-9         A-Za-z  2            return Pattern compile EMAIL STRING  matcher email  matches         OR  private boolean isValidMail String email       return android util Patterns EMAIL ADDRESS matcher email  matches        For Mobile Validation  For Valid Mobile You need to consider 7 digit to 13 digit because some country have 7 digit mobile number  If your main target is your own country then you can match with the length  Assuming India has 10 digit mobile number  Also we can not check like mobile number must starts with 9 or 8 or anything   For mobile number I used this two Function   private boolean isValidMobile String phone        if  Pattern matches   a-zA-Z     phone             return phone length    gt  6  amp  amp  phone length    lt   13            return false      OR  private boolean isValidMobile String phone        return android util Patterns PHONE matcher phone  matches

User · Answer

XML   lt android support v7 widget AppCompatEditText     android id    id et email contact      android layout width  match parent      android layout height  wrap content      android inputType  text      android maxLines  1      android hint  Enter Email or Phone Number   gt    Java  private AppCompatEditText et email contact  private boolean validEmail   false  validPhone   false        et email contact   findViewById R id et email contact   et email contact addTextChangedListener new TextWatcher          Override     public void beforeTextChanged CharSequence s  int start  int count  int after                 Override     public void onTextChanged CharSequence s  int start  int before  int count                 Override     public void afterTextChanged Editable s            String regex          0-9  10 13             String emailContact   s toString            if  TextUtils isEmpty emailContact                 Log e  Validation    Enter Mobile No or Email              else               if  emailContact matches regex                     Log e  Validation    Valid Mobile No                    validPhone   true                  validEmail   false                else if  Patterns EMAIL ADDRESS matcher emailContact  matches                      Log e  Validation    Valid Email Address                    validPhone   false                  validEmail   true                else                   validPhone   false                  validEmail   false                  Log e  Validation    Invalid Mobile No or Email                                       if  validPhone    validEmail        Toast makeText this   Valid Email or Phone no   Toast LENGTH SHORT  show      else       Toast makeText this   InValid Email or Phone no   Toast LENGTH SHORT  show

User · Answer

validation class  public class EditTextValidation    public static boolean isValidText CharSequence target        return target    null  amp  amp  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  - gt  registerNameET error    Please provide name           EditTextValidation isValidEmail emailID  - gt  registerEmailIDET error                Please provide email           EditTextValidation isValidPhoneNumber mobileNo  - gt  registerMobileET error                Please provide mobile number          else - gt                showToast  Hello World                       Hope it will work for you    It is a working example

User · Answer

Use Pattern package  in Android to match the input validation for email and phone   Do like   android util Patterns EMAIL ADDRESS matcher input  matches    android util Patterns PHONE matcher input  matches

User · Answer

public boolean checkForEmail             Context c          EditText mEtEmail  EditText findViewById R id etEmail           String mStrEmail   mEtEmail getText   toString            if  android util Patterns EMAIL ADDRESS matcher mStrEmail  matches                  return true                    Toast makeText this  Email is not valid   Toast LENGTH LONG  show            return false              public boolean checkForMobile             Context c          EditText mEtMobile  EditText findViewById R id etMobile           String mStrMobile   mEtMobile getText   toString            if  android util Patterns PHONE matcher mStrMobile  matches                  return true                    Toast makeText this  Phone No is not valid   Toast LENGTH LONG  show            return false

User · Answer

He want an elegant and proper solution try this small regex pattern matcher   This is specifically for India  First digit can t be zero and and then can be any 9 digits   return mobile matches   1-9  0-9  9       Pattern Breakdown -   1-9  matches first digit and checks if number integer  lies between inclusive  1 to 9  0-9  9  matches the same thing but  9  tells the pattern that it has to check for upcoming all 9 digits   Now the  9  part may vary for different countries so you may have array which tells the number of digits allowed in phone number  Some countries also have significance for zero ahead of number  so you may have exception for those and design a separate regex patterns for those countries phone numbers

User · Answer

I am always using this methode for Email Validation    public boolean checkForEmail Context c  EditText edit        String str   edit getText   toString        if  android util Patterns EMAIL ADDRESS matcher str  matches              return true            Toast makeText c   Email is not valid      Toast LENGTH LONG  show        return false

User · Answer

in Kotlin you can use Extension function to validate input    for Email validation  fun String isValidEmail    Boolean           this isNotEmpty    amp  amp  Patterns EMAIL ADDRESS matcher this  matches       for Phone validation fun String isValidMobile phone  String   Boolean       return Patterns PHONE matcher phone  matches

User · Answer

try this   extMobileNo addTextChangedListener new MyTextWatcher extMobileNo     private boolean validateMobile                String mobile  extMobileNo getText   toString   trim        if mobile isEmpty     isValidMobile mobile   extMobileNo getText   toString   toString   length   lt 10    mobile length   gt 13                      inputLayoutMobile setError getString R string err msg mobile            requestFocus extMobileNo           return false             else           inputLayoutMobile setErrorEnabled false              return true     private static boolean isValidMobile String mobile        return  TextUtils isEmpty mobile  amp  amp  Patterns PHONE matcher mobile  matches

User · Answer

For check email and phone number you need to do that   public static boolean isValidMobile String phone        boolean check   false      if   Pattern matches   a-zA-Z     phone             if  phone length    lt  9    phone length    gt  13                   if phone length      10                check   false                 txtPhone setError  Not Valid Number              else               check   android util Patterns PHONE matcher phone  matches                    else           check   false            return check     public static boolean isEmailValid String email        boolean check      Pattern p      Matcher m       String EMAIL STRING       A-Za-z0-9-           A-Za-z0-9-                       A-Za-z0-9-       A-Za-z0-9         A-Za-z  2            p   Pattern compile EMAIL STRING        m   p matcher email       check   m matches         return check       String enter mob or email      1234567890 or test gmail com if  isValidMobile enter mob or email       Phone number is valid    else isEmailValid enter mob or email    Email is valid    else    Not valid email or phone number

User · Answer

Try this  public class Validation        public final static boolean isValidEmail CharSequence target            if  target    null            return false            else           return android util Patterns EMAIL ADDRESS matcher target  matches                          public static final boolean isValidPhoneNumber CharSequence target            if  target length    10                return false            else               return android util Patterns PHONE matcher target  matches

[android] Email and phone Number Validation in android

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