res/layout/car_top_system_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2018 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
  -->

<com.android.systemui.car.systembar.CarSystemBarView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:systemui="http://schemas.android.com/apk/res-auto"
    android:id="@+id/car_top_bar"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/system_bar_background"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:layoutDirection="ltr">

        <FrameLayout
            android:id="@+id/system_icon_area"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_marginTop="@dimen/car_padding_2"
            android:layout_marginStart="@dimen/car_padding_2"
            android:layout_centerVertical="true"
            android:layout_alignParentStart="true"
            android:gravity="center_vertical"
        >
            <com.android.systemui.car.systembar.CarSystemBarButton
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:background="@drawable/system_bar_background_pill"
                android:layout_weight="1"
                android:gravity="center_vertical"
                systemui:intent="intent:#Intent;component=com.android.car.settings/.common.CarSettingActivities$QuickSettingActivity;launchFlags=0x24000000;end">

                <include
                    layout="@layout/system_icons"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:layout_marginStart="@dimen/car_padding_2"
                    android:layout_marginEnd="@dimen/car_padding_2"
                    android:gravity="center_vertical"
                />
            </com.android.systemui.car.systembar.CarSystemBarButton>
        </FrameLayout>

        <FrameLayout
            android:id="@+id/clock_container"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_centerInParent="true"
        >
            <com.android.systemui.car.systembar.CarSystemBarButton
                android:id="@+id/qs"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@null"
                systemui:intent="intent:#Intent;component=com.android.car.settings/.common.CarSettingActivities$QuickSettingActivity;launchFlags=0x24000000;end"
            />
            <com.android.systemui.statusbar.policy.Clock
                android:id="@+id/clock"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:elevation="5dp"
                android:singleLine="true"
                android:textAppearance="@style/TextAppearance.SystemBar.Clock"
                systemui:amPmStyle="normal"
            />
        </FrameLayout>

        <include layout="@layout/mic_privacy_chip"
            android:layout_width="@dimen/privacy_chip_width"
            android:layout_height="match_parent"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/clock_container"
            android:layout_toLeftOf="@id/user_name_container" />

        <FrameLayout
            android:id="@+id/user_name_container"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_centerVertical="true"
            android:layout_marginTop="@dimen/car_padding_2"
        >
            <com.android.systemui.car.systembar.CarSystemBarButton
                android:id="@+id/user_name"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_marginEnd="@dimen/car_padding_2"
                android:background="@drawable/system_bar_background_pill"
                android:gravity="center_vertical"
                systemui:intent="intent:#Intent;component=com.android.car.settings/.users.UserSwitcherActivity;launchFlags=0x24000000;end"
            >
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal"
                    android:layout_marginStart="@dimen/car_padding_2"
                    android:layout_marginEnd="@dimen/car_padding_2"
                    android:gravity="center_vertical"
                >
                    <ImageView
                        android:id="@+id/user_avatar"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"
                        android:src="@drawable/car_ic_user_icon"
                        android:layout_marginEnd="@dimen/system_bar_user_icon_padding"
                    />
                    <TextView
                        android:id="@+id/user_name_text"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"
                        android:gravity="center_vertical"
                        android:textAppearance="@style/TextAppearance.SystemBar.Username"
                        android:maxLines="1"
                        android:maxLength="10"
                        android:layout_marginEnd="@dimen/system_bar_user_icon_padding"
                    />
                </LinearLayout>
            </com.android.systemui.car.systembar.CarSystemBarButton>
        </FrameLayout>
    </RelativeLayout>

</com.android.systemui.car.systembar.CarSystemBarView>