我使用的是Android SDK中的图标，按钮，在窗口小部件刷新（ic_menu_refresh），我需要改变选择状态时，它是pssed $ P $。如何做到这一点？难道我定义XML的按钮？

I am using the Android SDK icon-button for refresh (ic_menu_refresh) in a widget and I need to change the selection state when it is pressed. How is this done? Do I define an XML for the button?

推荐答案

您通过选择在XML中定义的不同状态。

You define the different states in xml via selector.

样品（ESP看到国家的属性。）：

Sample (esp. see the state-attributes):

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

    <item android:drawable="@drawable/bg_catlocfilter" android:state_pressed="false" />
    <item android:drawable="@drawable/bg_catlocfilter_dark" android:state_pressed="true" />
    <item android:drawable="@drawable/bg_catlocfilter" android:state_focused="false" />
    <item android:drawable="@drawable/bg_catlocfilter_dark" android:state_focused="true" />

</selector>