Spinner - custom giao dien cho spinner

- main.xml :

<Spinner
          ......
            android:background="@drawable/background_spinner"
           .. ..

/>

- background_spinner.xml :

<?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/slim_spinner_pressed" />
     <item android:drawable="@drawable/slim_spinner_normal" />
</selector>

- icon slim_spinner_pressed là :

- icon slim_spinner_normal là :