Mastering Development

Problem in Implementing EditText field must contains alphanumeric

I have an EditText here called “idCustomerCode”, which used to input a code ID from user, which MUST contains alphanumeric on every input, for example (“abc123”), and will show error messages if it doesn’t meet the criteria. (example : not contains alphabet / numeric (“abcd” or “1234” only), or contains symbol). I have no idea […]