改变ToggleButton的图片及Button背景的更改

改变ToggleButton的图片
http://wang-peng1.iteye.com/blog/556021


在Android中使用自定义图片按钮
http://android.yaohuiji.com/archives/461
对某些控件的样式，外观的的修改的思考


Android应用开发笔记(10)：制作自定义背景Button按钮、自定义形状Button的全攻略
http://blog.csdn.net/xjanker2/article/details/6222690



http://www.cnblogs.com/mainroadlee/archive/2011/01/09/Change_the_background_image_based_on_the_state_of_the_button_on_Android.html
有效

<?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/btn_pressed" /> <!-- pressed -->
     <item android:state_focused="true"
           android:drawable="@drawable/btn_normal" /> <!-- focused -->
     <item android:drawable="@drawable/btn_normal" /> <!-- default -->
 </selector>