AndroidLauncher3/1000_r47/Code/SecondaryDisplayLauncher/res/layout/secondary_display_launcher.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.
  -->

<androidx.coordinatorlayout.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/RootView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/launcher_bg_color"
    android:fitsSystemWindows="true" >

    <GridView
        android:id="@+id/pinned_app_grid"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="@dimen/app_grid_margin_top"
        android:layout_marginStart="@dimen/app_grid_margin_left"
        android:layout_marginEnd="@dimen/app_grid_margin_right"
        android:columnWidth="@dimen/app_list_col_width"
        android:verticalSpacing="@dimen/app_list_horizontal_spacing"
        android:horizontalSpacing="@dimen/app_list_vertical_spacing"
        android:numColumns="auto_fit" />

    <ImageButton
        android:id="@+id/OptionsButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|start"
        android:layout_marginStart="@dimen/options_button_margin"
        android:layout_marginBottom="@dimen/options_button_margin"
        android:src="@drawable/ic_settings"
        android:background="@null"/>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/app_picker_fab_margin">

        <include layout="@layout/app_picker_layout"/>
    </FrameLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>