在Android中使用动态R字符串 [英] Use dynamic R strings in Android

问题描述

我在使用strings.xml中存储的字符串时遇到问题，我在其中存储了大量的字符串.它们对我非常有用，因为我正在使用它们来翻译程序.但是，现在我想在这些字符串之间动态选择，而且我不知道该怎么做.通过示例将更容易理解.假设我有以下字符串:

I'm having a problem using strings stored in my strings.xml, I have a wide list of strings stored there. They are very useful for me because I'm using them to translate my program. However, now I want to choose between those strings dynamically and I don't know how to do it. It will be easier to understand with an example. Let's assume that I have the following strings:

<string name="red">Red</string>
<string name="blue">Blue</string>
<string name="green">Green</string>
<string name="yellow">Yellow</string>

现在让我们假设我有一个函数，该函数向我传递带有颜色的字符串，例如"yellow".现在，我只有一个解决方案，可以进行非常大的切换(非常大，因为我有很多字符串)，我认为必须有一个选项可以将函数的输出转换为正确的参数. 我的意思是，如果我有一个返回"yellow"的函数，并且我想使用R.strings.yellow，则它们之间必须存在链接.我不知道您是否可以使用任何一种反射方式来实现这一目标.

And now let's assume that I have a function that passes me a string with a color, for example "yellow". Now I only have a solution for this, to make a very huge switch (very very huge, because I have lots of strings), I think that there must be an option to transform the output of my function into the right parameter. I mean, if I have a function that returns me "yellow", and I want to use R.strings.yellow, there must be a link between them. I don't know if maybe you could use any kind of reflection to achieve this.

你能帮我吗?

推荐答案

使用两步过程查找要加载的ID.首先使用Resources.getIdentifier()，例如:

Use a two-step process to find the id to load. First use Resources.getIdentifier(), for example:

int id = getResources().getIdentifier("yellow", "string", getPackageName());

然后，在检查id不为零(表明它找不到资源)之后，使用id获取类似于正常的字符串:

Then, after checking the id is not zero (which indicates it could not find the resource), use the id to get a string like normal:

String colour = getString(id);

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