EditText获得焦点，边框变色

1、在xml中添加EditText;

EditText

android:layout_width="fill_parent"

android:layout_height="36dip"

android:background="@drawable/bg_edittext"

android:padding="5dip"

android:layout_margin="36dip"

android:textColorHint="#AAAAAA"

android:textSize="15dip"

android:singleLine="true"

android:hint="请输入..."

/>

bg_edittext：

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