Regular Expression In Android for Password Field

Question

How can i validating the EditText with Regex by allowing particular characters . My condition is :

Password Rule:

1. On

Answer 1

All of the other answers are good, but the implementation of special characters were a bit too messy for my taste. I used Unicode for special characters instead.

I used special characters specified in the OWASP website.

Kotlin:

val SPECIAL_CHARACTERS_REGEX =
    "?=.*[\\u0020-\\u002F\\u003A-\\u0040\\u005B-\\u0060\\u007B-\\u007E]"
val PASSWORD_REGEX =
    "^(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])($SPECIAL_CHARACTERS_REGEX).{8,}\$"

fun isValidPassword(password: String) = Pattern.matches(PASSWORD_REGEX, password)