您可以从当前区域“提取”语言。你可以通过标准的Java API或者使用Android Context来提取语言环境。例如，下面这两行是等价的:

String locale = context.getResources().getConfiguration().locale.getDisplayName();
String locale = java.util.Locale.getDefault().getDisplayName();

您可以使用此代码找出键盘电流

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
InputMethodSubtype ims = imm.getCurrentInputMethodSubtype();
String locale = ims.getLocale();

你可以尝试从系统资源中获取locale:

PackageManager packageManager = context.getPackageManager();
Resources resources = packageManager.getResourcesForApplication("android");
String language = resources.getConfiguration().locale.getLanguage();

如果你想检查当前语言，请使用@Sarpe (@Thorbear)的答案:

val language = ConfigurationCompat.getLocales(Resources.getSystem().configuration)?.get(0)?.language
// Check here the language.
val format = if (language == "ru") "d MMMM yyyy г." else "d MMMM yyyy"
val longDateFormat = SimpleDateFormat(format, Locale.getDefault())

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()));

如果你想要获得你的设备所选择的语言，这可能会帮助你:

Locale.getDefault().getDisplayLanguage();

你可以使用Locale.getDefault().getLanguage();要获得常用的语言代码(例如:“德”、“en”)