<Spinner
    android:background="@drawable/background"
    android:id="@+id/spinner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    style="@android:style/Widget.Holo.Light.Spinner"/>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <corners android:radius="2dp" />
    <solid android:color="#00ff00" />
</shape>

<Spinner
        android:background="@drawable/spinner_background"
        android:id="@+id/date_spinner"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="false"
        android:popupBackground="@drawable/spinner_popup_background"/>