edittext 특수문자 제한, 한글만 입력

// 영문 + 숫자 
public InputFilter filterAlphaNum = new InputFilter() {
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        Pattern ps = Pattern.compile("^[a-zA-Z0-9]*$"); 
        if (!ps.matcher(source).matches()) { 
            return ""; 
        } 
        return null; 
    } 
}; 

// 한글 
public InputFilter filterKor = new InputFilter() {
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        Pattern ps = Pattern.compile("^[ㄱ-ㅣ가-힣]*$"); 
        if (!ps.matcher(source).matches()) { 
            return ""; 
        } 
        return null; 
    } 
}; 


editText.setFilters(new InputFilter[]{filterAlphaNum});