android - 选择器按钮在我的 android 按钮上不起作用。如何解决？

Question

嗨 Stackoverflow 的 friend 们。我在下面编写了 selector_button.xml 以使我的按钮在点击时更美观。但它根本不影响我的按钮。我哪里错了？

这是selector_button.xml

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

     <!-- When clicked  -->
    <item android:state_pressed="true"
        android:state_selected="true" >
        <shape >
        <gradient        
            android:angle="90"        
            android:centerColor="@color/Lightgray"        
            android:endColor="@color/White"        
            android:startColor="@color/LightBlue"/>    
            <corners android:radius="12dip" />    
            <stroke        
                android:width="0dip"       
                 android:color="@color/LightBlue" />

         </shape>
    </item>
    <!-- When not clicked-->
      <item >
        <shape >
        <gradient        
            android:angle="90"        
            android:centerColor="#ff008888"        
            android:endColor="@color/LightBlue"        
            android:startColor="@color/Lightgray"/>    
            <corners android:radius="12dip" />    
            <stroke        
                android:width="0dip"       
                 android:color="@color/LightBlue" />
      </shape> 
</item>


</selector>

Answer 1

  <!-- When not clicked-->
  <item android:state_pressed="false"> <!-- you need to define ur state to false-->
    <shape >
    <gradient        
        android:angle="90"        
        android:centerColor="#ff008888"        
        android:endColor="@color/LightBlue"        
        android:startColor="@color/Lightgray"/>    
        <corners android:radius="12dip" />    
        <stroke        
            android:width="0dip"       
             android:color="@color/LightBlue" />
     </shape> 
  </item>