edittext輸入框的背景效果

xml

<EditText 
        android:id="@+id/login_user_edit"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/login_top_layout"
        android:textColor="#000"
        android:textSize="15sp"
        android:layout_marginTop="25dp"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:singleLine="true"
        android:background="@drawable/login_editbox"
        android:hint="QQ號/微信號（請輸入gamecomb）"/>

drawable

<?xml version="1.0" encoding="UTF-8"?>
<selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true"  android:drawable="@drawable/login_edit_pressed" />
    <item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/login_edit_pressed" />
    <item android:state_focused="false" android:drawable="@drawable/login_edit_normal" />
</selector>