<ListView
          android:id="@+id/lvToDoList"
          android:layout_width="match_parent"
          android:layout_height="match_parent"></ListView>

      <android.support.design.widget.FloatingActionButton
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_gravity="bottom|right"
          android:layout_margin="16dp"
          android:src="@drawable/ic_done"
          app:layout_anchor="@id/lvToDoList"
          app:layout_anchorGravity="bottom|right|end" />

</android.support.design.widget.CoordinatorLayout>