A simple plugin for android and ios that detects a user's country code

• This plugin detects user's ISO country code based on SIM, Network, and Locale and returns the result as String
• Country Code is all CAPITALIZED. For example, "kr" will be returned as "KR"
• For some Mobile Virtual Network Operators "SIM" and "Network" isoCountryCode returns "--" only; therefore, will fallback to country code from "Locale"

final _countryDetector = CountryDetector();

• isoCountryCode Method will return a iso country code
• It checks for SIM first and if null, it will check for Network.
• If the value is still null, it will return country code from user's Locale

try{
  final cc = _countryDetector.isoCountryCode()
} catch (e) {
  print(e);
}

• detectAll method will return a all iso country code detected as AllCountries class

try{
  final allCodes = _countryDetector.detectAll()
} catch (e) {
  print(e);
}

• The detected values can be fetched by calling 'sim', 'network', and 'locale' -- code from sim => allCodes.sim -- code from network => allCodes.network -- code from locale => allCodes.locale