How to get the system language list

First, I ask you master them,
android how many countries are now able to support the language, and how to obtain this figure.
Then I would get the current language, how to get the list of languages.
Hope the experts advice, thanks ~

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Reply:
Locale.getAvailableLocales ()

Reply:
Thanks is Locale.getAvailableLocales () This has been made, thanks to help ~