Signal-Android/app/src/main/res/layout/chat_wallpaper_selection_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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">

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

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <androidx.appcompat.widget.AppCompatTextView
            android:id="@+id/chat_wallpaper_choose_from_photos"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:background="?selectableItemBackground"
            android:drawablePadding="26dp"
            android:gravity="center_vertical"
            android:minHeight="56dp"
            android:paddingStart="@dimen/dsl_settings_gutter"
            android:paddingEnd="@dimen/dsl_settings_gutter"
            android:text="@string/ChatWallpaperSelectionFragment__choose_from_photos"
            android:textAppearance="@style/Signal.Text.Body"
            android:textColor="@color/signal_text_primary"
            app:drawableStartCompat="@drawable/ic_photo_album_24"
            app:drawableTint="@color/signal_icon_tint_primary"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <View
            android:id="@+id/chat_wallpaper_divider"
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:layout_marginTop="16dp"
            android:background="@color/signal_inverse_transparent_05"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/chat_wallpaper_choose_from_photos" />

        <TextView
            android:id="@+id/chat_wallpaper_presets"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:gravity="center_vertical"
            android:minHeight="48dp"
            android:paddingStart="@dimen/dsl_settings_gutter"
            android:paddingTop="16dp"
            android:paddingEnd="@dimen/dsl_settings_gutter"
            android:paddingBottom="12dp"
            android:text="@string/ChatWallpaperSelectionFragment__presets"
            android:textAppearance="@style/TextAppearance.Signal.Body1.Bold"
            android:textStyle="bold"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/chat_wallpaper_divider" />

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/chat_wallpaper_recycler"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:orientation="vertical"
            android:paddingStart="@dimen/wallpaper_selection_gutter"
            android:paddingEnd="@dimen/wallpaper_selection_gutter"
            app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/chat_wallpaper_presets"
            app:spanCount="3"
            tools:listitem="@layout/chat_wallpaper_selection_fragment_adapter_item" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>