res/menu/filtershow_activity_menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:id="@+id/menu_share"
        android:actionProviderClass="android.widget.ShareActionProvider"
        android:showAsAction="always"
        android:enabled="false"
        android:title="@string/share"/>
    <item
        android:id="@+id/undoButton"
        android:icon="@drawable/filtershow_button_undo"
        android:showAsAction="never"
        android:title="@string/filtershow_undo"/>
    <item
        android:id="@+id/redoButton"
        android:icon="@drawable/filtershow_button_redo"
        android:showAsAction="never"
        android:title="@string/filtershow_redo"/>
    <item
        android:id="@+id/resetHistoryButton"
        android:title="@string/reset"/>
    <item
        android:id="@+id/operationsButton"
        android:icon="@drawable/filtershow_button_operations"
        android:showAsAction="never"
        android:visible="true"
        android:title="@string/show_history_panel"/>
    <item
        android:id="@+id/showImageStateButton"
        android:showAsAction="never"
        android:visible="false"
        android:title="@string/show_imagestate_panel" />
</menu>