<android.support.v7.widget.SearchView
  android:id="@+id/search_view"
  android:layout_width="match_parent"
  android:layout_height="?actionBarSize"
  app:iconifiedByDefault="false"
  app:queryBackground="@null"
  app:queryHint="@string/search_hint"
  app:searchIcon="@null"
  app:showDividers="none"
  app:submitBackground="@null">