res/layout/search_panel.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2016 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.
-->
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/search_panel"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <FrameLayout
        android:id="@+id/search_bar_container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/search_panel_background"
        android:elevation="4dp">
        <androidx.cardview.widget.CardView
            android:id="@+id/search_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/search_bar_margin"
            app:cardCornerRadius="2dp"
            app:cardBackgroundColor="?android:attr/colorBackground"
            app:cardElevation="2dp">
            <Toolbar
                android:id="@+id/search_toolbar"
                android:layout_width="match_parent"
                android:layout_height="@dimen/search_bar_height"
                android:background="?android:attr/selectableItemBackground"
                android:contentInsetStart="0dp"
                android:contentInsetStartWithNavigation="0dp"
                android:theme="?android:attr/actionBarTheme">
                <SearchView
                    android:id="@+id/search_view"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:iconifiedByDefault="false"
                    android:imeOptions="actionSearch|flagNoExtractUi"
                    android:searchIcon="@null"/>
            </Toolbar>
        </androidx.cardview.widget.CardView>
    </FrameLayout>

    <FrameLayout
        android:id="@+id/layout_results"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="vertical">

        <!-- Padding is included in the background -->
        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/list_results"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingStart="@dimen/dashboard_padding_start"
            android:paddingEnd="@dimen/dashboard_padding_end"
            android:paddingTop="@dimen/dashboard_padding_top"
            android:paddingBottom="@dimen/dashboard_padding_bottom"
            android:scrollbarStyle="outsideOverlay"
            android:scrollbars="vertical"/>

        <LinearLayout
            android:id="@+id/no_results_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingTop="35dp"
            android:orientation="vertical"
            android:visibility="gone">

            <Space
                android:layout_width="match_parent"
                android:layout_height="?android:attr/actionBarSize"/>

            <ImageView
                android:layout_height="wrap_content"
                android:layout_width="wrap_content"
                android:layout_gravity="center_horizontal"
                android:src="@drawable/empty_search_results"/>

            <TextView
                android:layout_height="wrap_content"
                android:layout_width="match_parent"
                android:paddingTop="24dp"
                android:textSize="18sp"
                android:text="@string/search_no_results"
                android:gravity="center"/>

        </LinearLayout>

    </FrameLayout>

    <include layout="@layout/search_feedback"/>

</LinearLayout>