調用XML可繪製的XML按鈕

Question

我在可繪製文件夾上有一系列圖像，我想在語言文件夾（drawable-p）中重複使用，因此我爲語言文件夾中的每個圖像創建了一個xml文件，如下所示：

<?xml version="1.0" encoding="utf-8"?> 
<bitmap xmlns:android="http://schemas.android.com/apk/res/android" 
    android:src="@drawable/habitat_over" /> 

然後我有一個XML文件夾，表示按鈕狀態的XML文件：

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

佈局

我有這樣的事情：

<ImageButton android:layout_weight="1" 
android:background="@null" 
android:layout_width="wrap_content" 
android:src="@xml/habitat_button" 
android:id="@+id/habitat" 
android:layout_height="wrap_content" 
android:scaleType="fitCenter"> 
</ImageButton> 

它應該工作，但是當我運行應用程序這個錯誤顯示出來：

Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class <unknown> 

E/AndroidRuntime( 409): at android.view.LayoutInflater.createView(LayoutInflater.java:518) 

E/AndroidRuntime( 409): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:568) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.rInflate(LayoutInflater.java:626) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.inflate(LayoutInflater.java:408) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 

E/AndroidRuntime( 409): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207) 

E/AndroidRuntime( 409): at android.app.Activity.setContentView(Activity.java:1657) 

E/AndroidRuntime( 409): at pnm.freiramadeira.ChapterSelection.onCreate(ChapterSelection.java:90) 

E/AndroidRuntime( 409): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 

E/AndroidRuntime( 409): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 

E/AndroidRuntime( 409): ... 11 more 

E/AndroidRuntime( 409): Caused by: java.lang.reflect.InvocationTargetException 

E/AndroidRuntime( 409): at java.lang.reflect.Constructor.constructNative(Native Method) 

E/AndroidRuntime( 409): at java.lang.reflect.Constructor.newInstance(Constructor.java:415) 

E/AndroidRuntime( 409): at android.view.LayoutInflater.createView(LayoutInflater.java:505) 

E/AndroidRuntime( 409): ... 25 more 

E/AndroidRuntime( 409): Caused by: android.content.res.Resources$NotFoundException: File res/xml/habitat_button.xml from drawable resource ID #0x7f050007 

E/AndroidRuntime( 409): at android.content.res.Resources.loadDrawable(Resources.java:1697) 

E/AndroidRuntime( 409): at android.content.res.TypedArray.getDrawable(TypedArray.java:601) 

E/AndroidRuntime( 409): at android.widget.ImageView.<init>(ImageView.java:118) 

E/AndroidRuntime( 409): at android.widget.ImageButton.<init>(ImageButton.java:85) 

E/AndroidRuntime( 409): at android.widget.ImageButton.<init>(ImageButton.java:81) 

E/AndroidRuntime( 409): ... 28 more 

E/AndroidRuntime( 409): Caused by: android.content.res.Resources$NotFoundException: File res/drawable-pt/habitat_over.xml from drawable resource ID #0x7f02002f 

E/AndroidRuntime( 409): at android.content.res.Resources.loadDrawable(Resources.java:1697) 

E/AndroidRuntime( 409): at android.content.res.Resources.getDrawable(Resources.java:581) 

E/AndroidRuntime( 409): at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:162) 

E/AndroidRuntime( 409): at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787) 

E/AndroidRuntime( 409): at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728) 

E/AndroidRuntime( 409): at android.content.res.Resources.loadDrawable(Resources.java:1694) 

E/AndroidRuntime( 409): ... 32 more 

E/AndroidRuntime( 409): Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #2: <bitmap> requires a valid src attribute 

E/AndroidRuntime( 409): at android.graphics.drawable.BitmapDrawable.inflate(BitmapDrawable.java:375) 

E/AndroidRuntime( 409): at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787) 

E/AndroidRuntime( 409): at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728) 

E/AndroidRuntime( 409): at android.content.res.Resources.loadDrawable(Resources.java:1694) 

E/AndroidRuntime( 409): ... 37 more 

有誰知道爲什麼出現這種情況？

在此先感謝！

Answer 1

儘管沒有真正的文檔記錄，<bitmap>的android:src屬性只接受圖像文件（不是XML中定義的可繪製的）。

而是在一個位圖有src="@drawable/habitat_over"，且引用該<bitmap>從您的佈局，取出<bitmap>並從佈局到@drawable/habitat_over增加的直接引用的。