action_bar_share_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/menu_item_share"
    android:showAsAction="ifRoom"
    android:title="Share"
    android:actionProviderClass="android.widget.ShareActionProvider" />
</menu>