Android email validation for english and arabic characters

问题

I am currently using this regular expression pattern to validate email addresses:

android.util.Patterns.EMAIL_ADDRESS.matcher(emailAddress).matches();

It doesn't work with Arabic characters. I need it to work with both English and Arabic characters.

This is the regex pattern I have incorporate for android (OS) in my project:

    public static final Pattern EMAIL_ADDRESS
    = Pattern.compile(
        "[a-zA-Z0-9\\+\\.\\_\\%\\-\\+]{1,256}" +
        "\\@" +
        "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,64}" +
        "(" +
            "\\." +
            "[a-zA-Z0-9][a-zA-Z0-9\\-]{0,25}" +
        ")+"
    );

I am not regex expert. I could use some help figuring out how to support both.

回答1:

This may not be the best answer, but I was able to get it to work by adding the aribic characters:

[\u0621-\u064A\u0660-\u0669a-zA-Z0-9\+\.\_\%\-\+]{1,256}\@[\u0621-\u064A\u0660-\u0669a-zA-Z0-9][\u0621-\u064A\u0660-\u0669a-zA-Z0-9\-]{0,64}(\.[\u0621-\u064A\u0660-\u0669a-zA-Z0-9][\u0621-\u064A\u0660-\u0669a-zA-Z0-9\-]{0,25})+

Here's an example on regexr! (it doesn't display Arabic selection properly, but it is selected)

来源：https://stackoverflow.com/questions/43150333/android-email-validation-for-english-and-arabic-characters