创建自定义样式会使应用程序崩溃

Question

我正在构建我的应用程序，以便它可以从多个主题中受益。

我已经到了想要添加自定义项目的阶段，例如

<style name="My.Theme.Default">
...
    <item name="borderColorDialog">@color/red</item>
...
</style>
<style name="My.Theme.Blue">
...
    <item name="borderColorDialog">@color/blue</item>
...
</style>

因此，我将属性borderColorDialog添加到我的属性文件中，如下所示：

<attr name="borderColorDialog" format="color" />

现在我想测试一下。我有一个绘图如下：

<?xml version="1.0" encoding="utf-8"?>
<layer-list 
    xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
        <shape 
            android:shape="rectangle" >
            <solid 
                android:color="?borderColorDialog" />
        </shape>
    </item> 
    <item
        android:bottom="2dp">
        <shape 
            android:shape="rectangle" >
            <solid 
                android:color="@color/black" />
        </shape>
    </item>
</layer-list>

在我看来，这一切在逻辑上都是合理的，然而?borderColorDialog引用使模拟器崩溃：

E/AndroidRuntime(1461): FATAL EXCEPTION: main
E/AndroidRuntime(1461): java.lang.RuntimeException: Unable to start activity ComponentInfo{.MainActivity}: android.view.InflateException: Binary XML file line #26: Error inflating class com.android.internal.widget.ActionBarContainer
E/AndroidRuntime(1461):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
E/AndroidRuntime(1461):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
E/AndroidRuntime(1461):     at android.app.ActivityThread.access$600(ActivityThread.java:130)
E/AndroidRuntime(1461):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
E/AndroidRuntime(1461):     at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(1461):     at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(1461):     at android.app.ActivityThread.main(ActivityThread.java:4745)
E/AndroidRuntime(1461):     at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(1461):     at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(1461):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
E/AndroidRuntime(1461):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
E/AndroidRuntime(1461):     at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(1461): Caused by: android.view.InflateException: Binary XML file line #26: Error inflating class com.android.internal.widget.ActionBarContainer
E/AndroidRuntime(1461):     at android.view.LayoutInflater.createView(LayoutInflater.java:613)
E/AndroidRuntime(1461):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
E/AndroidRuntime(1461):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
E/AndroidRuntime(1461):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
E/AndroidRuntime(1461):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
E/AndroidRuntime(1461):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
E/AndroidRuntime(1461):     at com.android.internal.policy.impl.PhoneWindow.generateLayout(PhoneWindow.java:2784)
E/AndroidRuntime(1461):     at com.android.internal.policy.impl.PhoneWindow.installDecor(PhoneWindow.java:2844)
E/AndroidRuntime(1461):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:252)
E/AndroidRuntime(1461):     at android.app.Activity.setContentView(Activity.java:1867)
E/AndroidRuntime(1461):     at .MainActivity.onCreate(MainActivity.java:30)
E/AndroidRuntime(1461):     at android.app.Activity.performCreate(Activity.java:5008)
E/AndroidRuntime(1461):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
E/AndroidRuntime(1461):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
E/AndroidRuntime(1461):     ... 11 more
E/AndroidRuntime(1461): Caused by: java.lang.reflect.InvocationTargetException
E/AndroidRuntime(1461):     at java.lang.reflect.Constructor.constructNative(Native Method)
E/AndroidRuntime(1461):     at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
E/AndroidRuntime(1461):     at android.view.LayoutInflater.createView(LayoutInflater.java:587)
E/AndroidRuntime(1461):     ... 24 more
E/AndroidRuntime(1461): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/actionbar_background.xml from drawable resource ID #0x7f020001
E/AndroidRuntime(1461):     at android.content.res.Resources.loadDrawable(Resources.java:1918)
E/AndroidRuntime(1461):     at android.content.res.TypedArray.getDrawable(TypedArray.java:601)
E/AndroidRuntime(1461):     at android.view.View.<init>(View.java:3336)
E/AndroidRuntime(1461):     at android.view.ViewGroup.<init>(ViewGroup.java:427)
E/AndroidRuntime(1461):     at android.widget.FrameLayout.<init>(FrameLayout.java:101)
E/AndroidRuntime(1461):     at android.widget.FrameLayout.<init>(FrameLayout.java:97)
E/AndroidRuntime(1461):     at com.android.internal.widget.ActionBarContainer.<init>(ActionBarContainer.java:52)
E/AndroidRuntime(1461):     ... 27 more
E/AndroidRuntime(1461): Caused by: java.lang.UnsupportedOperationException: Can't convert to color: type=0x2
E/AndroidRuntime(1461):     at android.content.res.TypedArray.getColor(TypedArray.java:326)
E/AndroidRuntime(1461):     at android.graphics.drawable.GradientDrawable.inflate(GradientDrawable.java:951)
E/AndroidRuntime(1461):     at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:881)
E/AndroidRuntime(1461):     at android.graphics.drawable.LayerDrawable.inflate(LayerDrawable.java:165)
E/AndroidRuntime(1461):     at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:881)
E/AndroidRuntime(1461):     at android.graphics.drawable.Drawable.createFromXml(Drawable.java:818)
E/AndroidRuntime(1461):     at android.content.res.Resources.loadDrawable(Resources.java:1915)
E/AndroidRuntime(1461):     ... 33 more

这个错误一直在发生。基本上是指XML。

将其返回到@color/red效果良好。

我该怎么解决这个问题？

Answer 1

根据我的经验，Android不允许在drawable中引用带有属性的颜色。我通过为每个主题创建一个形状的变通方法解决了这个问题。我在这里发布了一个描述，作为对之前问题的回答：

https://stackoverflow.com/a/13471695/891479