app 内部 语言切换

local could be Locale.US, Locale.CHINA and so on

public static void setLanguage(Context context, Locale locale) {
    Configuration config = context.getResources().getConfiguration();
    config.setLocale(locale);
    context.getResources().updateConfiguration(config, context.getResources().getDisplayMetrics());
}

原文：https://www.cnblogs.com/Jokeyyu/p/13812958.html