使Enum.toString（）本地化 [英] Make Enum.toString() localized

问题描述

我正在开发一个Android应用程序，我想知道我是否可以设置 Enum.toString（）多语言。

我将在 Spinner 上使用这个枚举，我想使用多语言文本。

  public class Types 
 {
 public enum Stature 
 {
 tall（ 0，高），
平均（1，平均），
 small（2，small）; 
 
 private final int stature; 
 private final String statureString; 
 
 Stature（int anStature，String anStatureString）{stature = anStature; statureString = anStatureString; } 
 
 public int getValue（）{return stature; 
 
 @Override 
 public String toString（）{return statureString; 
} 
} 
  

我不知道如何使用$一个枚举内的c $ c> Context.getString（），我已经硬编码为高，平均和小来测试它。我已经在帮助类中定义了枚举。

这个我如何使用枚举 Spinner ：

  mSpinStature .setAdapter（new ArrayAdapter< Stature>（mActivity，android.R.layout.simple_dropdown_item_1line，Stature.values（）））; 
  

你知道我该怎么做？

解决方案

假设这个资源路径

  String resourceBundlePath =my.package.bundles.messages
  

在包 my.package .bundles 您可能有 messages.properties ， messages_en_US.properties 等。

然后，使用

  ResourceBundle resourceBundle = ResourceBundle.getBundle（resourceBundlePath）; 
 String messageKey =myFirstMessage; 
 String message = resourceBundle.getMessage（messageKey）; 
  

消息将包含 messageKey 在 messages.properties 中定义的属性。如果当前的区域设置实际上是 en_US ，您将从 messages_en_US.properties 获取值。如果当前的区域设置是您没有的属性文件，则该值将从默认的 messages.properties

您还可以调用

  ResourceBundle.getBundle（resourceBundlePath，myLocale）; 
  

但通常最好使用平台语言环境（看看jvm参数-Duser.language ，-Duser.country）

您可以为每个要使用枚举元素名称翻译的枚举创建一个ResourceBundle，并将其用于您的枚举：

  @Override 
 public String toString（）{
 return resourceBudle.getString（super.toString （））; 
} 
  

I'm developing an Android application and I want to know if I can set Enum.toString() multilanguage.

I'm going to use this Enum on a Spinner and I want to use multi language texts.

public class Types
{
    public enum Stature
    {
        tall (0, "tall"),
        average(1, "average"),
        small(2, "small");

        private final int stature;
        private final String statureString;

        Stature(int anStature, String anStatureString) { stature = anStature; statureString = anStatureString; }

        public int getValue() { return stature; }

        @Override
        public String toString() { return statureString; }
    }
}

I don't know how to use Context.getString() inside an Enum, and I have hardcoded "tall", "average" and "small" to test it. I have defined that enum inside on a helper class.

This how I use the enum on a Spinner:

mSpinStature.setAdapter(new ArrayAdapter<Stature>(mActivity, android.R.layout.simple_dropdown_item_1line, Stature.values()));

Do you know how can I do it?

解决方案

Assume this resource path

String resourceBundlePath = "my.package.bundles.messages"

In package my.package.bundles you may have messages.properties, messages_en_US.properties etc.

Then, using

ResourceBundle resourceBundle = ResourceBundle.getBundle(resourceBundlePath);
String messageKey = "myFirstMessage";
String message = resourceBundle.getMessage(messageKey);

message will contain the value of the messageKey property defined on messages.properties. If the current Locale is actually en_US you will get the value from messages_en_US.properties. If the current locale is something you do not have a properties file for the value will be from the default messages.properties

You can also call

ResourceBundle.getBundle(resourceBundlePath, myLocale);

but it is generally better to use the platform locale (have a look at jvm arguments -Duser.language, -Duser.country)

You can have a ResourceBundle for each enum you want to translate with keys the enum element names and use it in the toString() implementation of your enum:

@Override
public String toString() {
return resourceBudle.getString(super.toString());
}

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