1 <?xml version="1.0" encoding="utf-8"?>2 <selector xmlns:android="http://schemas.android.com/apk/res/android" >3     <!-- 正常状态 -->4     <item android:state_pressed="false" android:drawable="@drawable/btn_normal" />5     <!-- 被按下状态 -->6     <item android:state_pressed="true" android:drawable="@drawable/btn_pressed" />7 </selector>

1 <Button2         android:background="@drawable/button_skin"3         android:text="@string/button"4         android:layout_width="wrap_content"5         android:layout_height="wrap_content" />