如何在android直播间中使用libphonenumber获取国家代码

implementation 'com.googlecode.libphonenumber:libphonenumber:8.12.19'

import com.google.i18n.phonenumbers.PhoneNumberUtil;
import com.google.i18n.phonenumbers.Phonenumber;

public String getCountryCode(String phoneNumber) {
    PhoneNumberUtil phoneNumberUtil = PhoneNumberUtil.getInstance();
    try {
        Phonenumber.PhoneNumber number = phoneNumberUtil.parse(phoneNumber, null);
        return "+" + number.getCountryCode();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return "";
}

String phoneNumber = "+11234567890";
String countryCode = getCountryCode(phoneNumber);
System.out.println("国家代码：" + countryCode);