Add disabled state to the Spinner widget.

-->

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item  android:state_window_focused="false" android:drawable="@drawable/btn_dropdown_normal" />

    <item android:state_pressed="true" android:drawable="@drawable/btn_dropdown_pressed" />

    <item android:state_focused="true" android:state_pressed="false"

    <item

        android:state_window_focused="false" android:state_enabled="true"

        android:drawable="@drawable/btn_dropdown_normal" />

    <item

        android:state_window_focused="false" android:state_enabled="false"

        android:drawable="@drawable/btn_dropdown_disabled" />

    <item

        android:state_pressed="true"

        android:drawable="@drawable/btn_dropdown_pressed" />

    <item

        android:state_focused="true" android:state_enabled="true"

        android:drawable="@drawable/btn_dropdown_selected" />

    <item android:drawable="@drawable/btn_dropdown_normal" />

    <item

        android:state_enabled="true"

        android:drawable="@drawable/btn_dropdown_normal" />

    <item

        android:state_focused="true"

        android:drawable="@drawable/btn_dropdown_disabled_focused" />

    <item

        android:drawable="@drawable/btn_dropdown_disabled" />

</selector>