boorujelly/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/mainToolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/design_default_color_primary"
        app:contentInsetStart="0dp">

        <androidx.cardview.widget.CardView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="7.5dp"
            app:cardCornerRadius="7.5dp">

            <androidx.appcompat.widget.SearchView
                android:id="@+id/search"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:iconifiedByDefault="false"
                android:queryBackground="@android:color/transparent"

                />


        </androidx.cardview.widget.CardView>

    </androidx.appcompat.widget.Toolbar>

    <FrameLayout
        android:id="@+id/imageGridRecV"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />


</androidx.appcompat.widget.LinearLayoutCompat>