設置背景從attrs.xml顏色參考崩潰

Question

我在我的主題定義的顏色類似以下內容：

attrs.xml

<attr name="defaultTextColor" format="color|reference" /> 

styles.xml

<style name="BaseLightTheme" parent="@style/Holo.Theme.Light"> 
<item name="defaultTextColor">@color/primary_text_holo_light</item> 
... 
</style> 

<style name="BaseDarkTheme" parent="@style/Holo.Theme"> 
<item name="defaultTextColor">@color/primary_text_holo_dark</item> 
... 
</style> 

每當我使用這個文字顏色，只需使用android:textColor="?defaultTextColor"工作正常。我想用這種顏色作爲視圖背景，但是這會使應用程序崩潰......爲什麼？我該如何解決這個問題？

這只是崩潰：

<View 
     android:layout_width="1dp" 
     android:layout_height="match_parent" 
     android:background="?defaultTextColor" /> 

編輯：logcat的加入

這裏是我的logcat這個錯誤（第19行是上述meantioned視圖的線）：

04-18 11:12:05.654: E/ACRA(8006): android.view.InflateException: Binary XML file line #19: Error inflating class <unknown> 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater._createView(LayoutInflater.java:262) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater.onCreateView(LayoutInflater.java:470) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater.createViewFromTag(LayoutInflater.java:316) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater.rInflate(LayoutInflater.java:604) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater.inflate(LayoutInflater.java:422) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater.inflate(LayoutInflater.java:372) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.LayoutInflater.inflate(LayoutInflater.java:367) 
04-18 11:12:05.654: E/ACRA(8006): at com.mf.androfit.fragments.WorkoutFragment$CardioViewFragment.onCreateViewHandler(WorkoutFragment.java:865) 
04-18 11:12:05.654: E/ACRA(8006): at com.mf.activitylibrary.fragments.BaseFragment.onCreateView(BaseFragment.java:185) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app._HoloFragment.onCreateView(_HoloFragment.java:124) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:928) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1105) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1461) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472) 
04-18 11:12:05.654: E/ACRA(8006): at com.mf.pagermanager.MFragStatePagerAdapter.finishUpdate(MFragStatePagerAdapter.java:170) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.view.ViewPager.populate(ViewPager.java:1068) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.view.ViewPager.populate(ViewPager.java:914) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.measureVertical(LinearLayout.java:877) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.onMeasure(LinearLayout.java:956) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:452) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.measureVertical(LinearLayout.java:784) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.onMeasure(LinearLayout.java:956) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.widget.MySlidingPaneLayout.onMeasure(MySlidingPaneLayout.java:523) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:639) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.WindowDecorView.onMeasure(WindowDecorView.java:113) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.measureVertical(LinearLayout.java:877) 
04-18 11:12:05.654: E/ACRA(8006): at org.holoeverywhere.widget.LinearLayout.onMeasure(LinearLayout.java:956) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.View.measure(View.java:15696) 
04-18 11:12:05.654: E/ACRA(8006): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4851) 
04-18 11:12:05.654: E/ACRA(8006): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 
04-18 11:12:05.654: E/ACRA(8006): at com.android.internal.policy.impl 

Answer 1

我不認爲你可以簡單地通過屬性定義一個視圖的背景。 爲了做到這一點，您需要創建一個自定義視圖。

你可以找到更多信息here。

一個簡單的例子是，在你的src目錄下創建一個單獨的Java類：

public class SuperView extends View { 

//You set all background attributes through your java code. 
} 

後，你去你的layout.xml和添加自定義視圖，例如：

<my.application.SuperView 
    android:...../>  

您可以在xml中爲該視圖添加一些其他常用屬性。