Spinner not showing when set a background

[RezaOruji]

when i add a background to spinner , it disappears.

<com.toptoche.searchablespinnerlibrary.SearchableSpinner
    android:id="@+id/spinner"
    android:layout_width=wrap_content"
    android:layout_height="wrap_content"
    android:entries="@array/planets"
    android:background="@color/colorAccent"
    app:hintText="SEKECCTTT"/>

[yilmazgokhan]

++

[ArsenioInojosa]

See #40