packages/SystemUI/res/layout/status_bar_toggle_slider.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->

<!--    android:background="@drawable/status_bar_closed_default_background" -->
<merge xmlns:android="http://schemas.android.com/apk/res/android">
    <CheckBox
        android:id="@+id/toggle"
        android:layout_width="48dp"
        android:layout_height="0dp"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:button="@null"
        android:background="@*android:drawable/switch_track_material"
        android:visibility="gone"
        />
    <com.android.systemui.settings.ToggleSeekBar
        android:id="@+id/slider"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_toEndOf="@id/toggle"
        android:layout_centerVertical="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentEnd="true"
        android:paddingStart="20dp"
        android:paddingEnd="20dp"
        android:paddingTop="16dp"
        android:paddingBottom="16dp"
        android:thumb="@drawable/ic_brightness_thumb"
        android:progressDrawable="@drawable/brightness_progress_drawable"
        android:splitTrack="false"
        />
    <TextView
        android:id="@+id/label"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_alignStart="@id/toggle"
        android:layout_alignEnd="@id/toggle"
        android:layout_centerVertical="true"
        android:gravity="center"
        android:paddingTop="26dp"
        android:textColor="#666666"
        android:textSize="12sp"
        android:visibility="gone"
        />
</merge>