Quelle  view_emoji_select_button.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center">

        <ImageView
            android:id="@+id/plus_icon"
            android:layout_width="18dp"
            android:layout_height="18dp"
            android:layout_gravity="center_vertical"
            android:visibility="visible"
            android:contentDescription="@string/select_emoji_content_description"
            app:tint="?attr/colorOnBackground"
            app:srcCompat="@drawable/ic_add_reaction_outline" />

    </FrameLayout>

</merge>