Android中有用的组件被选中和按下去的变换样式

记录一下，以备日后查阅

把下面的内容保存为xml文件，并放入到drawable文件夹中：

dockbar_selector.xml

<?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/selector_pressed_shape" />  
    <item android:state_focused="true" android:state_window_focused="true" android:drawable="@drawable/selector_focused_shape" />  
    <item android:state_focused="true" android:state_window_focused="false" android:drawable="@android:color/transparent" />  
</selector>  

selector_focused_shape.xml

<?xml version="1.0" encoding="UTF-8"?>  
<shape  
  xmlns:android="http://schemas.android.com/apk/res/android">  
    <solid android:color="#ffff9000" />  
    <stroke android:width="0.0dip" android:color="#00000000" />  
    <padding android:left="0.0dip" android:top="0.0dip" android:right="0.0dip" android:bottom="0.0dip" />  
    <corners android:topLeftRadius="6.0dip" android:topRightRadius="6.0dip" android:bottomLeftRadius="6.0dip" android:bottomRightRadius="6.0dip" />  
</shape>  

selector_pressed_shape.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <shape
   xmlns:android="http://schemas.android.com/apk/res/android">
     <solid android:color="#ffffba00" />
     <stroke android:width="0.0dip" android:color="#00000000" />
     <padding android:left="0.0dip" android:top="0.0dip" android:right="0.0dip" android:bottom="0.0dip" />
     <corners android:topLeftRadius="6.0dip" android:topRightRadius="6.0dip" android:bottomLeftRadius="6.0dip" android:bottomRightRadius="6.0dip" />
 </shape>

然后调用的时候，只需在layout的xml文件里面加上背景属性即可：

android:background="@drawable/dockbar_selector"