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:layout_marginBottom="44dp"
            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:id="@+id/backdrop_overlay"
            android:layout_width="match_parent"
            android:layout_height="160dp"
            android:layout_marginBottom="44dp"
            android:background="@drawable/manga_info_gradient"
            android:backgroundTint="?android:attr/colorBackground"
            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:paddingStart="16dp"
            android:paddingTop="48dp"
            android:paddingEnd="16dp"
            android:paddingBottom="8dp"
            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="100dp"
                tools:src="@mipmap/ic_launcher" />

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
                android:layout_marginStart="16dp"
                android:layout_marginBottom="16dp"
                android:orientation="vertical">

                <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:layout_marginTop="4dp"
                    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" />

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="4dp">

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

                    <TextView
                        style="@style/TextAppearance.Regular.Body1.Secondary"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="4dp"
                        android:layout_marginEnd="4dp"
                        android:text="•"
                        android:textIsSelectable="false"
                        tools:ignore="HardcodedText" />

                    <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>

        </LinearLayout>

        <com.google.android.material.button.MaterialButton
            android:id="@+id/btn_favorite"
            style="@style/Theme.Widget.Button.Action"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:text="@string/add_to_library"
            app:icon="@drawable/ic_favorite_border_24dp"
            app:layout_constraintEnd_toStartOf="@+id/btn_tracking"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/manga_info" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/btn_tracking"
            style="@style/Theme.Widget.Button.Action"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="@string/manga_tracking_tab"
            android:visibility="gone"
            app:icon="@drawable/ic_sync_24dp"
            app:layout_constraintEnd_toStartOf="@+id/btn_webview"
            app:layout_constraintStart_toEndOf="@+id/btn_favorite"
            app:layout_constraintTop_toBottomOf="@+id/manga_info"
            tools:visibility="visible" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/btn_webview"
            style="@style/Theme.Widget.Button.Action"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="16dp"
            android:text="@string/action_web_view"
            android:visibility="gone"
            app:icon="@drawable/ic_public_24dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/btn_tracking"
            app:layout_constraintTop_toBottomOf="@+id/manga_info"
            tools:visibility="visible" />

    </androidx.constraintlayout.widget.ConstraintLayout>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/manga_summary_section"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp">

        <TextView
            android:id="@+id/manga_summary_text"
            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:focusable="true"
            android:maxLines="2"
            android:textIsSelectable="false"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:text="Collapsed summary content Collapsed summary content Collapsed summary content Collapsed summary content Collapsed summary content Collapsed summary content" />

        <View
            android:id="@+id/manga_info_toggle_more_scrim"
            android:layout_width="20dp"
            android:layout_height="0dp"
            android:background="@drawable/manga_info_more_gradient"
            android:backgroundTint="?android:attr/colorBackground"
            app:layout_constraintBottom_toBottomOf="@+id/manga_summary_text"
            app:layout_constraintEnd_toStartOf="@id/manga_info_toggle_more"
            app:layout_constraintTop_toTopOf="@+id/manga_info_toggle_more" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/manga_info_toggle_more"
            style="@style/Theme.Widget.Button.TextButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingStart="8dp"
            android:paddingEnd="16dp"
            android:text="@string/manga_info_expand"
            android:textAlignment="viewEnd"
            app:layout_constraintBottom_toBottomOf="@+id/manga_summary_text"
            app:layout_constraintEnd_toEndOf="parent" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/manga_info_toggle_less"
            style="@style/Theme.Widget.Button.TextButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingStart="8dp"
            android:paddingEnd="16dp"
            android:text="@string/manga_info_collapse"
            android:textAlignment="viewEnd"
            android:visibility="gone"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/manga_summary_text" />

        <HorizontalScrollView
            android:id="@+id/manga_genres_tags_compact"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:requiresFadingEdge="horizontal"
            android:scrollbars="none"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/manga_summary_text">

            <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>

        <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"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/manga_info_toggle_less" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</LinearLayout>