可能在Kotlin中使用字符串获得颜色? [英] Possible to get color with string in kotlin?

问题描述

我曾经看过这个问题，但是直到我输入这个问题，Kotlin代码没有任何答案.

Ive had a look at this question but as of the time i typed this question, there aren't any answers with Kotlin code.

在我的colours.xml文件中，如何使用字符串访问类似这些颜色的颜色?

in my colours.xml file how would i access colours like these for example using a string?

<resources>
    <!-- Orange -->
    <color name="orangePrimary">#f6a02d</color>
    <color name="orange1">#e3952a</color>
    <color name="orange2">#da8f28</color>
    <color name="orange3">#d08926</color>
</resources>

Java版本显然是这个

The Java version is apparently this

int desiredColour = getResources().getColor(getResources().getIdentifier("my_color", "color", getPackageName())); 

当android studio翻译我得到的代码时

when android studio translates the code i get this

val desiredColour: Int = getResources().getColor(
                                    getResources().getIdentifier(
                                        "my_color",
                                        "color",
                                        getPackageName()
                                    )

但是packageName()和getResources()由于某些原因变成红色，这意味着有错误

However packageName() and getResources() turn out red for some reason which means there is an error

那么Kotlin版本是什么?

So what would the Kotlin version be?

推荐答案

对此只有一种可能的解释.在粘贴代码的位置不存在getPackageName()和getResources().

There is only one possible explanation for this. getPackageName() and getResources() are not present where you are pasting the code.

例如，如果我将您的代码粘贴到活动中，那么一切似乎都很好.

For example if I paste your code in an activity, everything seems good.

val desiredColour = resources.getColor(resources.getIdentifier("my_color", "color", packageName))

带有主题:

val desiredColour = resources.getColor(resources.getIdentifier("my_color", "color", packageName),theme)

但是，如果我将其粘贴到片段中，则需要引用该片段的活动以获取程序包名称.

But if I paste it inside fragment, I need to reference the activity of that fragment to get the package name.

val desiredColour = resources.getColor(resources.getIdentifier("my_color", "color", activity?.packageName))

带有主题:

val desiredColour = resources.getColor(resources.getIdentifier("my_color", "color", activity?.packageName),activity?.theme)

如果由于某种原因将其粘贴到活动或片段之外的其他位置，则需要传递上下文或活动来调用这些方法.

And if for some reason you are pasting it elsewhere besides activity or fragment, you need to pass context or activity to call those method.

object TestSingleObject {
    fun getDesiredColour(context: Context) =
        context.resources.getColor(context.resources.getIdentifier("my_color", "color", context.packageName))
}

带有主题:

object TestSingleObject {
    fun getDesiredColour(context: Context) =
        context.resources.getColor(context.resources.getIdentifier("my_color", "color", context.packageName), context.theme)
}

这篇关于可能在Kotlin中使用字符串获得颜色?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！