java - android.content.res.Resources$NotFoundException -/res/color/file.xml

Question

我正在尝试在我的 android 应用程序中实现颜色状态列表资源，遵循 Android 开发人员指南 Color State List Resource | Android Developers .所以我在目录 res/color/ 中创建了两个资源文件 button_text.xml 和 button_background.xml 并在 with 中引用它们@color/button_text 和@color/button_background 分别在activity_main.xml 中。这是布局代码:

<Button
    android:id="@+id/myButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/app_name"
    android:layout_marginTop="150dp"
    android:layout_gravity="center"
    android:textColor="@color/button_text"
    android:background="@color/button_background"/>

在运行该应用程序时，我在日志中收到一个Resources Not Found Exception，如下所示:

Process: com.example.myanimation, PID: 29254
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myanimation/com.example.myanimation.MainActivity}: android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class Button
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2659)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2724)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1473)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Caused by: android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class Button
Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class Button
Caused by: android.content.res.Resources$NotFoundException: Drawable com.example.myanimation:color/button_background with resource ID #0x7f0b0053
Caused by: android.content.res.Resources$NotFoundException: File res/color/button_background.xml from drawable resource ID #0x7f0b0053
at android.content.res.ResourcesImpl.loadDrawableForCookie(ResourcesImpl.java:729)
at android.content.res.ResourcesImpl.loadDrawable(ResourcesImpl.java:575)
at android.content.res.Resources.loadDrawable(Resources.java:854)
at android.content.res.TypedArray.getDrawable(TypedArray.java:928)
at android.view.View.<init>(View.java:4177)
at android.widget.TextView.<init>(TextView.java:710)
at android.widget.Button.<init>(Button.java:109)
at android.widget.Button.<init>(Button.java:105)
at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:65)
at android.support.v7.widget.AppCompatButton.<init>(AppCompatButton.java:61)
at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:109)
at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1026)
at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1083)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:769)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.example.myanimation.MainActivity.onCreate(MainActivity.java:11)
at android.app.Activity.performCreate(Activity.java:6672)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2612)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2724)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1473)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)

我尝试清理并重建项目，但没有成功。此外，将 xml 文件 放在 res/drawable/ 而不是 res/color/ 中显示相同的错误。请帮助解决问题。提前致谢!

编辑:

这是 button_text.xml 文件代码:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#000"
          android:state_pressed="true"/>
    <item android:color="#fff"
          android:state_activated="true"/>
</selector>

还有，button_background.xml文件代码:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#fff"
          android:state_pressed="true"/>
    <item android:color="#000"
          android:state_activated="true"/>
</selector>

Answer 1

所以，就在这里。请阅读完整答案。与 android:textColor 不同，android:background 属性不支持 Color State List。要使 android:background 属性起作用，您需要 State List Drawables。因此，不是 res/color/ 在 res/drawable/ 目录中创建文件。这是代码:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/white"
          android:state_pressed="true"/>
    <item android:drawable="@color/black"
          android:state_activated="true"/>
</selector>

注意使用 android:drawable 而不是 android:color。 Android 将使用颜色资源并从中制作可绘制对象。要完成此操作，您需要将颜色资源添加到您的 res/values/colors.xml 文件中。

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