RecyclerView smoothScrollToPosition(lastItem) scrolls to bottom where last item is partially visible

Question

Im working on chat type screen where new text msg item is added in list and recyclerView is scrolled to last position of the list but the last item is partially visible, and does not scroll till end of bottom when the keyboard is open. I have added

 android:layout_width="match_parent"
            android:gravity="top"
            android:layout_gravity="fill_vertical"
            android:windowSoftInputMode="adjustResize"
            android:clipToPadding="false"
            android:layout_height="match_parent"
            app:layout_constrainedHeight="true"
            app:layout_scrollFlags="scroll|enterAlways"
           app:layout_behavior="@string/appbar_scrolling_view_behavior"
            android:layout_marginBottom="@dimen/margin_5"

to the recycler view. I have also tried to use recyclerView.layoutMangaer.smoothScrollToPosition, ScrollBy() method, and also used some 300 msec delay to scroll. Nothing worked.

Will appreciate some help. Thanks.