my app uses the following code to get the local currency:
Locale locale = Locale.getDefault()
java.util.Currency localCurrency = java.util.Currency.getInstance(locale);
This workes fine in all my tests and was never a problem before. Today I saw a CrashLog in the Google Play Developer Console: The app crashes with:
java.lang.IllegalArgumentException: Unsupported ISO 3166 country: es
I can easy reproduce this error when using new Locale("es") instead of Locale.getDefault():
Locale locale = new Locale("es");
java.util.Currency localCurrency = java.util.Currency.getInstance(locale);
Actually the same exception is thrown no matter was language code I use, e.g. "en", "de", "fr", etc. Only when also the country code is specified everthing workes fine, e.g. new Locale("es", "ES")
I have two problems with Exception:
1. Why is "es" not a valid locale? As fas as I understand Locale names are formed by a language code (lowercase), and an optional country code. Thus es-ESwould be a valid locale but "es" should be as well, shouldn't it?
2. What can I do to avoid this problem? I use Locale.getDefault() all over the app to give the user locale currency, locale numberformat, etc. I would assume that the system always returns a valid Locale but this is obviously not the case. How can I make sure, that a valid locale is used?
You should pay attention to this :
http://docs.oracle.com/javase/7/docs/api/java/util/Currency.html#getInstance(java.util.Locale)
If you specify a language and no country there is no way the system can determine a currency.