LibreTube/app/src/main/res/layout/fragment_search.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    tools:context=".SearchFragment"
    >

    <com.google.android.material.card.MaterialCardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/outlinedTextField"
        style="@style/Widget.Material3.CardView.Filled"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_margin="5dp"
        >
        <com.google.android.material.textfield.TextInputLayout
            style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:hintEnabled="false"
            android:layout_marginRight="20dp"
            android:layout_marginLeft="20dp"
           android:background="@android:color/transparent"
>

            <AutoCompleteTextView
                android:id="@+id/autoCompleteTextView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="Search"
                android:imeOptions="actionSearch"
                android:inputType="text"
                android:maxLines="1"
                android:background="@android:color/transparent"
                android:padding="12dp" />

        </com.google.android.material.textfield.TextInputLayout>

    </com.google.android.material.card.MaterialCardView>



    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/search_recycler"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/outlinedTextField"
        />

</androidx.constraintlayout.widget.ConstraintLayout>