Quelle  popup_emojireactions.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent">

    <com.google.android.material.card.MaterialCardView
        android:id="@+id/cardview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="@dimen/emoji_popup_cardview_margin_bottom"
        android:layout_marginTop="@dimen/emoji_popup_cardview_margin_top"
        android:layout_marginLeft="@dimen/emoji_popup_cardview_margin_horizontal"
        android:layout_marginRight="@dimen/emoji_popup_cardview_margin_horizontal"
        app:strokeWidth="0dp"
        app:shapeAppearanceOverlay="?attr/shapeAppearanceCornerMedium"
        app:cardElevation="4dp">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:orientation="horizontal">

            <ch.threema.app.emojis.EmojiItemView
                android:id="@+id/top_0"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:layout_marginRight="2dp"
                android:padding="@dimen/reaction_popup_content_margin"
                android:foreground="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

            <ch.threema.app.emojis.EmojiItemView
                android:id="@+id/top_1"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:layout_marginRight="2dp"
                android:padding="@dimen/reaction_popup_content_margin"
                android:foreground="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

            <ch.threema.app.emojis.EmojiItemView
                android:id="@+id/top_2"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:layout_marginRight="2dp"
                android:padding="@dimen/reaction_popup_content_margin"
                android:foreground="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

            <ch.threema.app.emojis.EmojiItemView
                android:id="@+id/top_3"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:layout_marginRight="2dp"
                android:padding="@dimen/reaction_popup_content_margin"
                android:foreground="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

            <ch.threema.app.emojis.EmojiItemView
                android:id="@+id/top_4"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:layout_marginRight="2dp"
                android:padding="@dimen/reaction_popup_content_margin"
                android:foreground="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

            <ch.threema.app.emojis.EmojiItemView
                android:id="@+id/top_5"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:layout_marginRight="2dp"
                android:padding="@dimen/reaction_popup_content_margin"
                android:foreground="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

            <ImageView
                android:id="@+id/add_reaction"
                android:layout_width="@dimen/reaction_popup_emoji_size"
                android:layout_height="@dimen/reaction_popup_emoji_size"
                android:padding="@dimen/reaction_popup_content_margin"
                android:src="@drawable/ic_add_reaction_outline"
                app:tint="?attr/colorOnSurface"
                android:contentDescription="@string/select_emoji"
                android:background="?attr/selectableItemBackgroundBorderless"
                android:clickable="true"
                android:focusable="true" />

        </LinearLayout>

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

</FrameLayout>