failed to find'?attr/actionBarSize' in current theme

error:failed to find'?attr/actionBarSize' in current theme
½â¾ö°ì·¨：
<android.support.v7.widget.Toolbar
    android:id="@+id/modifytoolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/colorPrimary">

¸ÄΪ

android:layout_height="?android:attr/actionBarSize"