Center button

            android:layout_height="wrap_content" />

    </LinearLayout>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:gravity="center">

        <ImageButton

            android:id="@+id/floating_button"

            android:layout_width="48dp"

            android:layout_height="48dp"

        android:layout_gravity="top|end"

        android:layout_marginTop="8dp"

        android:layout_marginEnd="8dp"

            android:background="@android:color/transparent"

            android:src="@drawable/ic_ime_switch"

            android:contentDescription="@string/ime_switch_button"

            android:focusable="true"

        android:clickable="true" />

            android:focusableInTouchMode="true" />

    </LinearLayout>

</FrameLayout>