android - Applying a theme to a menu item? -

sorry if question sounds stupid, new android , need help. have 2 menu items

  <item android:id="@+id/submenu11" android:title="newest" android:icon="@android:drawable/radiobutton_off_background"  />   <item android:id="@+id/submenu12" android:title="oldest" android:icon="@android:drawable/radiobutton_off_background"/> 

they use radio button icon, when launch app grey circle- unlike supposed like. how add theme, or color these icons not grey circles , more radio buttons? in advance, help

of question, used radio_off icon, if want set radio button menu, should create custom button on it,like this:

<item     android:id="@+id/action_navigate_search"     android:icon="@drawable/ic_search_white"     android:orderincategory="1"     android:title="@string/search"     app:actionviewclass="android.support.v7.widget.searchview"     app:showasaction="ifroom|collapseactionview"/> 

you can use "actionviewclass" set custom view, of want, there can write android.widget.radiobutton