后台xml无法正常工作

Question

我有按钮，我想为他们设置背景xml，当用户按任意按钮我想改变它的背景时，我就像这样工作

<Button
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:textColor="#FFFFFF"
                android:gravity="center"
                android:background="@drawable/button_selector"
                android:text="@string/b_cancel" />

button_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/button_bg" android:state_pressed="false" android:state_selected="false"/>
    <item android:drawable="@drawable/button_bg_hover" android:state_pressed="true"/>
    <item android:drawable="@drawable/button_bg_hover" android:state_pressed="false" android:state_selected="true"/>

</selector>

button_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <padding android:top="10dip"
        android:bottom="10dip"/>



    <!-- Gradient Bg for listrow -->
    <gradient
        android:useLevel="false"
        android:angle="270"
        android:centerColor="#000000"
        android:endColor="#FFFFFF"
        android:startColor="#808080" />
</shape>

button_bg_hover.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >

    <padding
        android:bottom="10dip"
        android:top="10dip" />

    <!-- Gradient Bg for Button -->
    <gradient
        android:angle="270"
        android:centerColor="#000000"
        android:endColor="#FF0000"
        android:startColor="#808080" />

</animation-list>

它作为背景很好但是当我按下按钮时它会变成全白，激发我的button_bg_hover，为什么要pelase？什么是正确的？

Answer 1

可能是错位的-tag，改变了行

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >
  ..... 
</animation-list>

到

<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
  .....
</shape>