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

XML

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();
}