Android Email Validation on EditText

Question

I have one edittext and I would to to write email validation in my Editttext this is a xml code

Answer 1

private void isValidEmail(String email_id) {

        if (email_id == null){
            checkTextView.setVisibility(View.VISIBLE);
            checkTextView.setText(LocaleController.getString("EnterValidEmail", R.string.EnterValidEmail));
            return;
        }
        if (android.util.Patterns.EMAIL_ADDRESS.matcher(email_id).matches()) {
            checkTextView.setVisibility(View.GONE);
        } else {
            checkTextView.setVisibility(View.VISIBLE);
            checkTextView.setText(LocaleController.getString("EnterValidEmail", R.string.EnterValidEmail));
        }

Take a textView ex.checkTextView and validate when the email is valid then the textview is gone otherwise it show the message