How to fix java.util.regex.PatternSyntaxException in android

Question

public static boolean isEmailValid(String email) {
        boolean isValid = false;

        String expression = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";

        Pattern pattern = Pattern.compile(expression, Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(email);
        if (matcher.matches()) {
            isValid = true;
        }
        return isValid;
    }

I am calling this in Activity for email validation

  if (!Util.isEmailValid(binding.etEmail.getText().toString().trim())) {
                Toast.makeText(this, getResources().getString(R.string.valid_email), Toast.LENGTH_SHORT).show();
                return false;
            }

i am getting the crash report .

java.util.regex.PatternSyntaxException: Error in {min,max} interval near index 7 (+\d{٣}[\s-]?\d{0}[\s-]?)

let me know if not clear i will post full crash report

Please help me what i am doing wrong and how to fix this crash .

Uncle Roger · Accepted Answer · 2022-03-15 11:31:39Z

1

Use this

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

instead of this

String emailPattern = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$"

answered Mar 15, 2022 at 11:31

Uncle Roger

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3 Comments

MARSH Over a year ago

Thanks for help me ,but will it cover for all validation which is given in question ?

Uncle Roger Over a year ago

Yup. Most of them. Why don't you test them out? Thank you.

MARSH Over a year ago

Thanks its working but can you please help me to understand why this crash is coming this crash is not coming for all device its coming for specific device like Android OS-10

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