Quelle  header_recipient_list.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingVertical="@dimen/listitem_contacts_margin_top_bottom"
    android:paddingHorizontal="@dimen/listitem_contacts_margin_left_right"
    android:gravity="center_vertical"
    android:clickable="true"
    android:focusable="true"
    android:background="@drawable/listitem_background_selector">

    <ImageView
        android:id="@+id/avatar_view"
        android:layout_width="@dimen/avatar_size_small"
        android:layout_height="@dimen/avatar_size_small"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:scaleType="center"
        app:srcCompat="@drawable/ic_person_add_outline"
        android:contentDescription="@string/menu_add_contact"
        app:tint="?attr/colorOnSurface" />

    <TextView
        android:id="@+id/text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="@dimen/messagelist_avatar_padding"
        android:layout_toRightOf="@id/avatar_view"
        android:textAppearance="@style/Threema.TextAppearance.List.FirstLine"
        android:text="@string/menu_add_contact" />

</RelativeLayout>