Android的颜色选择不与自定义属性工作 [英] Android color selector doesn't work with custom attributes

问题描述

我有在attrs.xml

I've got in attrs.xml

<resources> 
    <!-- theme specific colors -->
    <attr format="reference|color" name="foreground" />
    <attr format="reference|color" name="background" /> 
</resources>

然后在theme.xml

And then in theme.xml

<style name="MyTheme" parent="android:Theme.Black">
    <item name="android:windowNoTitle">true</item>
    <item name="foreground">#0000FF</item>
    <item name="background">#00FF00</item>
</style>

我还创建颜色选择器名为forground_to_background.xml

I also created color selector named forground_to_background.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">   
    <item android:state_pressed="true" android:color="?background"/> <!-- pressed -->
    <item android:state_focused="true" android:color="?background"/> <!-- focused -->
    <item android:color="?foreground"/> <!-- default -->
</selector>

现在我想使用它都聚集在TextView的：

Now I'd like to use it all together in TextView:

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textColor="@color/forground_to_background" />

不幸的是它不工作。而不是有漂亮的绿蓝色我有只有一种颜色 - 红色。 TextView的永远是红色的。当我改变的TextView使用？前景颜色会发生变化。此外，当我在颜色选择器改变从？XXXX硬codeD值＃00F颜色开始工作。

Unfortunately it doesn't work. Instead of having nice green blue colors I've got only one color - red. TextView is always red. When I change TextView to use "?foreground" color will change. Also when I change in colors selector from "?xxxx" to hardcoded value as "#00f" color start to work.

在哪里的问题？我究竟做错了什么？

Where is problem? What am I doing wrong?

编辑： 我相信这是重复的问题/错误<一的href="http://stackoverflow.com/questions/3757696/can-a-selector-resource-use-a-color-defined-in-a-style">Can一个选择资源使用的样式定义的颜色？

I believe it is duplicate of problem/bug Can a selector resource use a color defined in a style?

EDIT2： 此外，当我尝试使用这个TextView的ListView中应用程序崩溃。它不能解析XML。

Moreover when I try use this TextView in ListView application crashes. It cannot parse XML.

推荐答案

之所以出现这种情况是，我有不同的语境。虽然充气语境意识到我的主题ATTRS，但到ListView适配器我通过ApplicationContext的是不知道这些的attrs的。现在，我不知道为什么它不知道他们。）

The reason why this happens is that I have different Context. While inflating Context is aware of my theme attrs, but to the ListView adapter I passed ApplicationContext that wasn't aware of those attrs. Now I don't know why it doesn't know about them ;)

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