Use dimen value for bottom space height under dialpad in landscape mode.

            <!-- Margin bottom and alignParentBottom don't work well together, so use a Space instead. -->

            <Space android:id="@+id/dialpad_floating_action_button_margin_bottom"

                android:layout_width="match_parent"

                android:layout_height="8dp"

                android:layout_height="@dimen/floating_action_button_margin_bottom"

                android:layout_alignParentBottom="true" />

            <FrameLayout