java.lang.UnsupportedOperationException：无法转换为color：type = 0x1 [英] java.lang.UnsupportedOperationException: Can't convert to color: type=0x1

问题描述

我一直在关注Android开发人员培训的myfirstapp指南，但我遇到了一个问题他们没有正确解释如何定义颜色。

I've been following throught the myfirstapp guide on Android developers training but I've come across a problem where they do not properly explain how to define colors.

他们提到要创建自定义主题，你可以声明你的文字颜色如下：

They mention that to create a custom theme, you can declare your text colors as such:

themes.xml

themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- the theme applied to the application or activity -->
    <style name="CustomActionBarTheme"
        parent="@android:style/Theme.Holo.Light.DarkActionBar">
        <item name="android:actionBarStyle">@style/MyActionBar</item>
        <item name="android:textColor">@style/MyActionBarTitleText</item>
        <item name="android:actionBarTabTextStyle">@style/MyActionBarTabText</item>
    </style>

    <!-- ActionBar styles -->
    <style name="MyActionBar"
        parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">
        <item name="android:background">@drawable/actionbar_background</item>
    </style>

    <!-- ActionBar title text -->
    <style name="MyActionBarTitleText"
        parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
        <item name="android:textColor">@color/actionbar_text</item>
    </style>

    <!-- ActionBar tabs text styles -->
    <style name="MyActionBarTabText"
        parent="@android:style/Widget.Holo.ActionBar.TabText">
        <item name="android:textColor">@color/actionbar_text</item>
    </style>
</resources>

他们没有提到如何指定 @ color / actionbar_text ，但常识（以及一些谷歌搜索）表示值包中需要colors.xml文件：

They do not mention how to specify @color/actionbar_text, but common sense (and some googling) indicates that a colors.xml file is required in the values package:

colors.xml

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="actionbar_text">#ff355689</color>
</resources>

然而，当尝试运行应用程序时，它会出错：

However, when trying to run the app, it gives an error:

Process: com.example.myfirstapp, PID: 25997
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.MainActivity}: java.lang.UnsupportedOperationException: Can't convert to color: type=0x1

如果我从colors.xml中删除该行，则在找不到颜色引用时会出错。我相对肯定我的代码是正确的，任何人都可以看到任何错误吗？

If I remove the line from colors.xml, it errors when it can't find the color reference. Im relatively certain my code is correct, can anyone see any errors?

编辑

我只是想要注意我实际上对themes.xml文件使用略有不同的语法，因为教程不会编译。本教程使用 @ style / Widget.Holo.ActionBar.TabText ，我发现它实际上是android的属性，所以我需要使用 @android ：style / Widget.Holo.ActionBar.TabText 而不是。

I just wanted to note that I am actually using slightly different syntax for the themes.xml file as the tutorial ones dont compile. The tutorial uses @style/Widget.Holo.ActionBar.TabText, which I found was actually a property of android, so I needed to use @android:style/Widget.Holo.ActionBar.TabText instead.

推荐答案

如果我没弄错的话该代码意味着Android在预期颜色值或未能将引用转换为颜色时找到引用。看看你的代码，这一行脱颖而出

If I'm not mistaken that code means Android found a reference when it expected a color value or failed to convert reference to color. Looking at your code this line stands out

<item name="android:textColor">@style/MyActionBarTitleText</item>

尽管你可以在textColor中有一个引用，但我不确定你可以将它设置为样式。

Despite you can have a reference in textColor I'm not sure you can set it as a style.

因此，请尝试直接引用您的颜色

So try to reference your color directly

<item name="android:textColor">@color/actionbar_text</item>

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