public class LocalUtils {

    private static final String LANGUAGE_CODE_ENGLISH = "en";


    // returns application language eg: en || fa ...
    public static String getAppLanguage() {
        return Locale.getDefault().getLanguage();
    }

    // returns device language eg: en || fa ...
    public static String getDeviceLanguage() {
        return ConfigurationCompat.getLocales(Resources.getSystem().getConfiguration()).get(0).getLanguage();
    }

    public static boolean isDeviceEnglish() {
        return getDeviceLanguage().equals(new Locale(LANGUAGE_CODE_ENGLISH).getLanguage());
    }

    public static boolean isAppEnglish() {
        return getAppLanguage().equals(new Locale(LANGUAGE_CODE_ENGLISH).getLanguage());
    }


}

Log.i("AppLanguage: ",     LocalUtils.getAppLanguage());
Log.i("DeviceLanguage: ",  LocalUtils.getDeviceLanguage());
Log.i("isDeviceEnglish: ", String.valueOf(LocalUtils.isDeviceEnglish()));
Log.i("isAppEnglish: ",    String.valueOf(LocalUtils.isAppEnglish()));

请注意，这里的大多数答案提供了应用程序的语言。在某些情况下，这个应用程序可以拥有/设置与设备不同的语言。

获取实际的设备语言(是的，如果用户在设置中添加了多种语言，它将返回所有的语言!)

科特林：

// Will return something like ["en_US", "de_DE"]
val deviceLanguages: LocaleListCompat = ConfigurationCompat.getLocales(Resources.getSystem().configuration)
// Will return the actual language in use, like "en" or "de". The first language in the above code will be the default language
val currentActiveDeviceLanguage = languages.get(0).language 

public class LocalUtils {

    private static final String LANGUAGE_CODE_ENGLISH = "en";


    // returns application language eg: en || fa ...
    public static String getAppLanguage() {
        return Locale.getDefault().getLanguage();
    }

    // returns device language eg: en || fa ...
    public static String getDeviceLanguage() {
        return ConfigurationCompat.getLocales(Resources.getSystem().getConfiguration()).get(0).getLanguage();
    }

    public static boolean isDeviceEnglish() {
        return getDeviceLanguage().equals(new Locale(LANGUAGE_CODE_ENGLISH).getLanguage());
    }

    public static boolean isAppEnglish() {
        return getAppLanguage().equals(new Locale(LANGUAGE_CODE_ENGLISH).getLanguage());
    }


}

Log.i("AppLanguage: ",     LocalUtils.getAppLanguage());
Log.i("DeviceLanguage: ",  LocalUtils.getDeviceLanguage());
Log.i("isDeviceEnglish: ", String.valueOf(LocalUtils.isDeviceEnglish()));
Log.i("isAppEnglish: ",    String.valueOf(LocalUtils.isAppEnglish()));

你可以用这个

boolean isLang = Locale.getDefault().getLanguage().equals("xx");

当“xx”是任何语言代码，如“en”，“fr”，“sp”，“ar”....等等

这个解决方案对我很有效。这将返回android设备的语言(不是应用程序的本地语言)

String locale = getApplicationContext().getResources().getConfiguration().locale.getLanguage();

这将返回"en"或"de"或"fr"或任何你的设备语言设置。

基本的Kotlin答案:

Locale.getDefault().language