android button 自定义

wp_button.xml(\drawable目录下建个)

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
  andorid:state_window_focused="false"
  android:state_enabled="true"
  android:drawable="@drawable/grey_wp_button"/><!--不按下状态图-->
<item
  android:state_pressed="true"
  android:drawable="@drawable/grey_wp_button_down"/><!--按下图-->
<item
  android:state_focused="true"
  android:state_enabled="true"
  android:drawable="@drawable/grey_wp_button_active"/><!--活动-->
<item
  android:state_enabled="true"
  android:drawable="@drawable/grey_wp_button"/>
</selector>

<!--9patch自作图片-->
在布局文件里引用
background="@drawable/wp_button"

附件三张图片也放到drawable里面