接下来建立三个xml文件,分别为输入框未获得焦点时的背景，输入框获得焦点时的背景，selector背景选择器（这里能获得输入框什么时候获得和失去焦点），代码如下：
bg_edittext_normal.xml(未获得焦点时)
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://www.easck.com/apk/res/android">
<solid android:color="#FFFFFF" />
<corners android:radius="3dip"/>
<stroke
android:width="1dip"
android:color="#BDC7D8" />
</shape>
bg_edittext_focused.xml(获得焦点时)
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://www.easck.com/apk/res/android">
<solid android:color="#FFFFFF" />
<corners android:radius="3dip"/>
<stroke
android:width="1dip"
android:color="#728ea3" />
</shape>
bg_edittext.xml(selector选择器，这方面资料网上很多)
<?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://www.easck.com/apk/res/android">
<item android:state_window_focused="false" android:drawable="@drawable/contact_edit_edittext_normal" />
<item android:state_focused="true" android:drawable="@drawable/contact_edit_edittext_focused" />
</selector>
这样就OK了，效果图如下：
