tachiyomi/app/src/main/res/layout/manga_info_header.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="wrap_content"
    android:orientation="vertical"
    tools:context=".ui.browse.source.browse.BrowseSourceController">

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

        <ImageView
            android:id="@+id/backdrop"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:alpha="0.2"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:background="@mipmap/ic_launcher" />

        <View
            android:layout_width="match_parent"
            android:layout_height="88dp"
            android:background="@drawable/manga_info_gradient"
            app:layout_constraintBottom_toBottomOf="parent" />

        <LinearLayout
            android:id="@+id/manga_info"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="16dp"
            app:layout_constraintTop_toTopOf="parent">

            <eu.kanade.tachiyomi.ui.manga.info.MangaCoverImageView
                android:id="@+id/manga_cover"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@drawable/rounded_rectangle"
                android:contentDescription="@string/description_cover"
                android:maxWidth="220dp"
                tools:src="@mipmap/ic_launcher" />

            <LinearLayout
                android:id="@+id/manga_info_section"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:orientation="vertical"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toEndOf="@+id/manga_cover"
                app:layout_constraintTop_toTopOf="parent">

                <TextView
                    android:id="@+id/manga_full_title"
                    style="@style/TextAppearance.Medium.Title"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:maxLines="3"
                    android:text="@string/manga_info_full_title_label"
                    android:textIsSelectable="false"
                    app:autoSizeMaxTextSize="20sp"
                    app:autoSizeMinTextSize="12sp"
                    app:autoSizeStepGranularity="2sp"
                    app:autoSizeTextType="uniform" />

                <TextView
                    android:id="@+id/manga_author"
                    style="@style/TextAppearance.Regular.Body1.Secondary"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textIsSelectable="false"
                    tools:text="Author" />

                <TextView
                    android:id="@+id/manga_artist"
                    style="@style/TextAppearance.Regular.Body1.Secondary"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textIsSelectable="false"
                    tools:text="Artist" />

                <TextView
                    android:id="@+id/manga_status"
                    style="@style/TextAppearance.Regular.Body1.Secondary"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="8dp"
                    android:ellipsize="end"
                    android:maxLines="1"
                    android:textIsSelectable="false"
                    tools:text="Status" />

                <TextView
                    android:id="@+id/manga_source"
                    style="@style/TextAppearance.Regular.Body1.Secondary"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:ellipsize="end"
                    android:maxLines="1"
                    android:textIsSelectable="false"
                    tools:text="Source" />

            </LinearLayout>

        </LinearLayout>

        <HorizontalScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:requiresFadingEdge="horizontal"
            app:layout_constraintTop_toBottomOf="@+id/manga_info">

            <LinearLayout
                android:id="@+id/actions_bar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:paddingStart="16dp"
                android:paddingEnd="16dp">

                <com.google.android.material.button.MaterialButton
                    android:id="@+id/btn_favorite"
                    style="@style/Theme.Widget.Button.Icon"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:checkable="true"
                    android:text="@string/add_to_library"
                    app:icon="@drawable/ic_favorite_border_24dp" />

                <com.google.android.material.button.MaterialButton
                    android:id="@+id/btn_tracking"
                    style="@style/Theme.Widget.Button.Icon"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="8dp"
                    android:checkable="true"
                    android:text="@string/manga_tracking_tab"
                    android:visibility="gone"
                    app:icon="@drawable/ic_sync_24dp"
                    tools:visibility="visible" />

                <com.google.android.material.button.MaterialButton
                    android:id="@+id/btn_share"
                    style="@style/Theme.Widget.Button.Icon.Textless"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="8dp"
                    android:contentDescription="@string/action_share"
                    android:visibility="gone"
                    app:icon="@drawable/ic_share_24dp"
                    tools:visibility="visible" />

                <com.google.android.material.button.MaterialButton
                    android:id="@+id/btn_webview"
                    style="@style/Theme.Widget.Button.Icon.Textless"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="8dp"
                    android:contentDescription="@string/action_open_in_web_view"
                    android:visibility="gone"
                    app:icon="@drawable/ic_public_24dp"
                    tools:visibility="visible" />

            </LinearLayout>

        </HorizontalScrollView>

    </androidx.constraintlayout.widget.ConstraintLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/selectableItemBackground"
        android:orientation="vertical">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingStart="16dp"
            android:paddingEnd="16dp">

            <TextView
                android:id="@+id/manga_summary_label"
                style="@style/TextAppearance.Regular.SubHeading"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:text="@string/manga_info_about_label"
                android:textIsSelectable="false"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toStartOf="@+id/manga_info_toggle"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <com.google.android.material.button.MaterialButton
                android:id="@+id/manga_info_toggle"
                style="@style/Theme.Widget.Button.Icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:text="@string/manga_info_expand"
                app:icon="@drawable/ic_baseline_expand_more_24dp"
                app:iconTint="?attr/colorOnPrimary"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <TextView
            android:id="@+id/manga_summary"
            style="@style/TextAppearance.Regular.Body1.Secondary"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="16dp"
            android:clickable="true"
            android:ellipsize="end"
            android:focusable="true"
            android:maxLines="2"
            android:textIsSelectable="false"
            tools:text="Summary" />

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

            <com.google.android.material.chip.ChipGroup
                android:id="@+id/manga_genres_tags_full_chips"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginStart="16dp"
                android:layout_marginEnd="16dp"
                android:paddingTop="8dp"
                android:paddingBottom="8dp"
                android:visibility="gone"
                app:chipSpacingHorizontal="4dp" />

            <HorizontalScrollView
                android:id="@+id/manga_genres_tags_compact"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:requiresFadingEdge="horizontal">

                <com.google.android.material.chip.ChipGroup
                    android:id="@+id/manga_genres_tags_compact_chips"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:paddingStart="16dp"
                    android:paddingTop="8dp"
                    android:paddingEnd="16dp"
                    android:paddingBottom="8dp"
                    app:chipSpacingHorizontal="4dp"
                    app:singleLine="true" />

            </HorizontalScrollView>

        </FrameLayout>

    </LinearLayout>

</LinearLayout>