Android编程之selector下设置背景属性值的方法

true，当该组件能使用时显示该图片；false，当该组件不能使用时显示该图片。

android:state_window_focused

Boolean. "true" if this item should be used when the application window has focus (the application is in the foreground), "false" if this item should be used when the application window does not have focus (for example, if the notification shade is pulled down or a dialog appears).
true，当此activity获得焦点在最前面时显示该图片；false，当没在最前面时显示该图片。

 

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://www.easck.com/apk/res/android">
  <item android:state_pressed="true"
     android:drawable="@drawable/button_pressed"/><!-- pressed -->
  <item android:state_focused="true"
     android:drawable="@drawable/button_focused"/><!-- focused -->
  <itemandroid:drawable="@drawable/button_normal"/><!-- default -->
</selector>

 

希望本文所述对大家Android程序设计有所帮助。

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