Android 判断是否为手机号码的方法

public static boolean isPhoneNumberValid(String phoneNumber) {
boolean isValid = false;
String expression = "^\\(?(\\d{3})\\)?[- ]?(\\d{3})[- ]?(\\d{5})$";
String expression2 = "^\\(?(\\d{3})\\)?[- ]?(\\d{4})[- ]?(\\d{4})$";
CharSequence inputStr = phoneNumber;
Pattern pattern = Pattern.compile(expression);
Matcher matcher = pattern.matcher(inputStr);

Pattern pattern2 = Pattern.compile(expression2);
Matcher matcher2 = pattern2.matcher(inputStr);
if(matcher.matches() || matcher2.matches()) {
isValid = true;
}
return isValid;
}